Weather Saturday
16 responses | 0 likes
Started by metmike - Feb. 29, 2020, 7:30 p.m.

Happy Leap Day.......February 29th!  If your were born on February 29, 1956, Happy 16th Birthday (-:

 Keep giving thanks to be living in the best time of human history!

 Scroll down and  enjoy the latest comprehensive weather to the max...... occurring because of the natural physical laws in our atmosphere as life on this greening planet continues to enjoy the best weather/climate in at least 1,000 years(the last time that it was this warm) with the added bonus of extra beneficial CO2.


Still MILD extended today, especially vs a week ago's forecast.

Some  cool shots in the East though. 



Never too old: Reasons to be thankful here in 2020!

https://www.marketforum.com/forum/topic/45623/


Winter Weather Forecasts


https://www.wpc.ncep.noaa.gov/wwd/winter_wx.shtml

  Snowfall the next 7 days below.

Big snow for northern New England!
Here are the latest hazards across the country.

                                                            Southern Florida NE Gulf N of 25N E of 87WGulf from 22N to 25N E of 87W including Straits of Florida NW Gulf including Stetson BankN Central Gulf including Flower Garden Banks Marine SanctuaryW Central Gulf from 22N to 26N W of 94WCentral Gulf from 22N to 26N between 87W and 94W Atlantic from 27N to 31N W of 77WAtlantic from 27N to 31N between 70W and 77WAtlantic from 27N to 31N between 65W and 70WBahamas N of 22N including the Cay Sal BankAtlantic from 22N to 27N E of Bahamas to 70W Tropical N Atlantic from 15N to 19N between 55W and 60WCaribbean N of 18N between 76W and 85W including the Cayman BasinCaribbean N of 18N between 76W and 85W including the Cayman BasinCaribbean approaches to the Windward PassageAtlantic S of 22N W of 70W including approaches to the Windward PassageNewport/Morehead City, NCBrownsville, TXCorpus Christi, TXHouston/Galveston, TXNew Orleans, LALake Charles, LAMobile, ALTallahassee, FLTampa, FLMiami, FLKey West, FLFlorida KeysMiami, FLMelbourne, FLJacksonville, FLCharleston, SCWilmington, NCBaltimore/Washington, DCWakefield, VAPhiladelphia/Mt. Holly, PA/NJNew York, NYBoston, MAGray/Portland, ME Intra Coastal Waters from Schoodic Point ME to Stonington MECoastal Waters from Schoodic Point ME to Stonington ME out 25 NMWaters from Eastport ME to Stonington ME from 25 to 40 NMNortheast Minnesota and Northern WisconsinNorthern MichiganNorthern MichiganNorthern MichiganEast Central Wisconsin - Green BayEast Central Wisconsin - Green BaySouthern and Southeastern WisconsinNortheastern Illinois and Northwestern Indiana - ChicagoNorthern Indiana and Northwestern OhioSouthwestern MichiganNortheast Michigan - GaylordNortheast Michigan - GaylordNortheast Michigan - GaylordSoutheastern Michigan - DetroitSoutheastern Michigan - DetroitSoutheastern Michigan - DetroitNorthern OhioWestern New York - BuffaloWestern New York - Buffalo Northern MichiganLos Angeles, CASan Diego, CASan Francisco Bay Area/Monterey, CAEureka, CAMedford, ORPortland, ORSeattle, WALos Angeles AreaLos Angeles AreaLos Angeles AreaLos Angeles AreaLos Angeles AreaLos Angeles AreaSouth Central CaliforniaSan Francisco AreaWestern NevadaNorth Central CaliforniaNorthwest California CoastSouthwest Oregon and Northern CaliforniaNortheast Oregon and Southeast WashingtonNorthwest OregonNorthwest WashingtonEastern Washington and Northern IdahoSouthern Nevada, Southeastern California and Northwestern Arizona - Las VegasSouthwestern California - San DiegoCentral Arizona and California DesertsSoutheast ArizonaNorthern ArizonaUtahNorthern and Northeastern NevadaSouthwestern Idaho and Eastern OregonSoutheastern IdahoWestern Montana and Central IdahoCentral Montana - Great FallsNortheastern MontanaSoutheastern MontanaWestern WyomingSoutheastern Wyoming and Western NebraskaNortheastern ColoradoWestern Colorado and Eastern UtahSoutheastern ColoradoNorthern and Central New MexicoSouthern New Mexico and extreme Western Texas - El PasoTexas and OklahomaLubbock and South Plains TexasWestern Texas and Southeastern New MexicoWestern South Dakota and Northeastern WyomingNorthwestern Kansas and East Central Colorado - GoodlandCentral Nebraska - North PlatteNorth Central Kansas and South Central NebraskaSoutheastern South Dakota, Southwestern Minnesota, and Northwestern IowaNorthern and Northeastern South DakotaWestern North DakotaEastern Nebraska and Southwestern Iowa - Omaha ValleyNortheastern KansasSoutheastern KansasSouthwestern Kansas - Dodge CityCentral OklahomaEastern Oklahoma and Northwestern ArkansasDallas and Fort WorthCentral Texas - San AngeloAustin and San Antonio TexasCorpus Christi, Victoria, and Laredo TexasSouthern TexasTexas - Houston/GalvestonSoutheast Texas and Southwest LouisianaNorthern Louisiana and Eastern Texas - ShreveportArkansasSouthwestern MissouriNorthwestern MissouriCentral IowaSouthern MinnesotaNortheastern North Dakota and Northwestern MinnesotaNortheast Minnesota and Northern WisconsinSouthwestern Wisconsin, Southeastern Minnesota, and Northeast IowaEastern Iowa and Northwestern Illinois - Quad CitiesEastern Missouri - West Central IllinoisWestern Tennessee, Eastern Arkansas and Northern Mississippi - MemphisCentral MississippiSoutheastern LouisianaMiddle TennesseeNorthern AlabamaCentral AlabamaMobile - PensacolaWest Central FloridaEast Central FloridaPanhandle of Florida and Southwestern GeorgiaNortheast Florida and Southeast GeorgiaNorthern and Central GeorgiaLow Country of South Carolina and GeorgiaNortheastern South Carolina and Southeastern North Carolina - WilmingtonCentral South Carolina and CSRAWestern North Carolina and Northwest South CarolinaEastern TennesseeEastern KentuckyCentral KentuckySouthern Illinois and Indiana, Southeastern Missouri and Western KentuckyCentral and East Central IllinoisCentral IndianaNortheastern Illinois and Northwestern Indiana - ChicagoSouthern and Southeastern WisconsinEast Central Wisconsin - Green BayNorthern MichiganNortheast Michigan - GaylordNortheast Michigan - GaylordSoutheastern Michigan - DetroitSouthwestern MichiganNorthern Indiana and Northwestern OhioSouthwestern Ohio Northern KentuckyWest VirginiaWestern Virginia, Southeast West Virginia, and Northwest North CarolinaCentral North Carolina - RaleighEastern North CarolinaEastern Virginia, Southern Maryland and Northeast North CarolinaWashington D.C., Central Maryland, Northern Virginia, Eastern West VirginiaWestern Pennsylvania, East Central Ohio and Extreme Western MarylandNorthern OhioCentral PennsylvaniaNew Jersey, Delaware, and Southeastern PennsylvaniaNew York City and Surrounding AreasSouth Central New York and Northeastern PennsylvaniaWestern New York - BuffaloEastern New York and Western New England AreasBoston and Surrounding AreasNorthern Vermont and New YorkSouthern Maine and New HampshireNorthern Maine Gulf of Maine to the Hague LineGeorges Bank between Cape Cod and 68W north of 1000 fathomsSouth of New England between the Great South Channel and Montauk Point to 1000 fathomsSouth of Long Island between Montauk Point and Sandy Hook to 1000 fathomsHudson Canyon to Baltimore Canyon to 1000 fathomsBaltimore Canyon to Cape Charles Light to 100 NM offshoreCape Charles Light to Currituck Beach Light to 100 NM offshoreCurrituck Beach Light to Cape Hatteras to 100 NM offshoreCape Hatteras to Cape Fear to 100 NM offshoreCape Fear to 31N to 1000 FMGeorges Bank between 68W and the Hague LineEast of 69W to the Hague Line between 1000 fathoms and 39NEast of 69W and south of 39N to 250 NM offshoreBetween 1000 fathoms and 38.5N west of 69WBaltimore Canyon to 69W east of 1000 fathoms and south of 38.5N to 250 NM offshoreBaltimore Canyon to Hatteras Canyon between 100 NM and 250 NM offshoreHatteras Canyon to Cape Fear 100 NM and 250 NM offshoreCape Fear to 31N east of 1000 fathoms to 250 NM offshoreCape Flattery to Cape Shoalwater between 60 NM and 150 NM offshoreCape Shoalwater to Cape Lookout between 60 NM and 150 NM offshoreCape Lookout to Florence, OR between 60 NM and 150 NM offshoreFlorence, OR to Point St. George between 60 NM and 150 NM offshorePoint St. George to Point Arena between 60 NM and 150 NM offshorePoint Arena to Pigeon Point between 60 NM and 150 NM offshorePigeon Point to Point Piedras Blancas between 60 NM and 150 NM offshorePoint Piedras Blancas to Santa Cruz Island, CA between 60 NM and 150 NM offshoreSanta Cruz Island, CA to San Clemente Island, CA between 60 NM and 150 NM offshoreCape Flattery to Cape Shoalwater between 150 NM and 250 NM offshoreCape Shoalwater to Cape Lookout between 150 NM and 250 NM offshoreCape Lookout to Florence, OR between 150 NM and 250 NM offshoreFlorence, OR to Point St. George between 150 NM and 250 NM offshorePoint St. George to Point Arena between 150 NM and 250 NM offshorePoint Arena to Pigeon Point between 150 NM and 250 NM offshorePigeon Point to Point Piedras Blancas between 150 NM and 250 NM offshorePoint Piedras Blancas to Santa Cruz Island, CA between 150 NM and 250 NM offshoreSanta Cruz Island, CA to 120W between 150 NM and 250 NM offshoreSan Clemente Island, CA to Guadalupe Island from 60 NM Offshore west to 120W                                                                                                                                                                  


Purple/Pink/blue on land is cold/Winter weather. Brown is wind,  Green is flooding. Gray is fog.  Reddish is a red flag advisory.  

Go to the link below, then hit the location/county on the map for details.

                 https://www.spc.noaa.gov/                 Go to "hazards"                                                                                     

                   



 

https://www.mesonet.org/index.php/weather/map/us_air_temperature/air_temperature


https://www.mesonet.org/index.php/weather/map/wind_chill_heat_index1/air_temperature



 Current Weather Map


NCEP Days 0-7 Forecast Loop
NCEP Short-Range Model Discussion
NCEP Day 3-7 Discussion

 

       
Understanding These Maps
Surface Map Legend
Precip Legend
NCEP Surface Maps
(Mouseover)

U.S. Surface Analysis
National Radar Image
12-Hr Forecast
24-Hr Forecast
36-Hr Forecast
48-Hr Forecast
Short Term Loop
Day 3 Forecast
Day 4 Forecast
Day 5 Forecast
Day 6 Forecast
Day 7 Forecast
Low Tracks Error Circle
Low Tracks Ensemble





Legend

                                        

                          


Current Jet Stream


Low Temperatures Tomorrow Morning

                    

                    

                    


                                        

Highs today and tomorrow.

 

                                    

Comments
By metmike - Feb. 29, 2020, 7:34 p.m.
Like Reply

Highs for days 3-7:


  Mild next week!   


http://www.wpc.ncep.noaa.gov/medr/DAY3_MAX_filled.gif

https://www.wpc.ncep.noaa.gov/medr/DAY4_MAX_filled.gif

http://www.wpc.ncep.noaa.gov/medr/DAY5_MAX_filled.gifhttp://www.wpc.ncep.noaa.gov/medr/DAY6_MAX_filled.gif

                                    

https://www.wpc.ncep.noaa.gov/medr/DAY7_MAX_filled.gif

                                                          

By metmike - Feb. 29, 2020, 7:34 p.m.
Like Reply

Mostly reds.


https://www.wpc.ncep.noaa.gov/medr/medr_mean.shtml


http://www.wpc.ncep.noaa.gov/medr/hpcmaxwbg.gif


https://www.wpc.ncep.noaa.gov/medr/95Bwbg.gif

                                    

By metmike - Feb. 29, 2020, 7:35 p.m.
Like Reply

Surface Weather features day 3-7:


New, very wet southern stream system early next week just south of the Ohio River.  Quiet elsewhere.

https://www.wpc.ncep.noaa.gov/medr/5dayfcst_wbg_conus.gif

                                    

By metmike - Feb. 29, 2020, 7:37 p.m.
Like Reply

Liquid equivalent precip forecasts for the next 7 days are below.


Another  big rain developing from the southern stream, early next week  in the S/SE.

Day 1 below:


http://www.wpc.ncep.noaa.gov/qpf/fill_94qwbg.gif?1526306199054

http://www.wpc.ncep.noaa.gov/qpf/fill_94qwbg.gif?1531339983148

Day 2 below:

http://www.wpc.ncep.noaa.gov/qpf/fill_98qwbg.gif?1528293750112


http://www.wpc.ncep.noaa.gov/qpf/fill_98qwbg.gif?1531340045174


Day 3 below

http://www.wpc.ncep.noaa.gov/qpf/fill_99qwbg.gif?1528293842764

http://www.wpc.ncep.noaa.gov/qpf/fill_99qwbg.gif?1531340092706



Days 4-5 below:

http://www.wpc.ncep.noaa.gov/qpf/95ep48iwbg_fill.gif?1526306162

http://www.wpc.ncep.noaa.gov/qpf/95ep48iwbg_fill.gif?1531339379

 Days 6-7 below:

http://www.wpc.ncep.noaa.gov/qpf/97ep48iwbg_fill.gif?1526306162

http://www.wpc.ncep.noaa.gov/qpf/97ep48iwbg_fill.gif?1531339379

7 Day Total precipitation below:

https://www.wpc.ncep.noaa.gov/qpf/p168i.gif?1566925971


https://www.wpc.ncep.noaa.gov/qpf/p168i.gif?1566925971

  

By metmike - Feb. 29, 2020, 7:38 p.m.
Like Reply

Last 24 hour precip top map

Last 7 day precip below that

https://www.wunderground.com/maps/precipitation/daily

Static mapAnimated mapCA - BakersfieldNY - BinghamtonND - BismarckNH - BerlinTX - BrownsvilleKY - Bowling GreenMI - CadillacNC - CharlotteGA - ColumbusOH - DaytonCO - DenverIA - Des MoinesFL - Key WestVA - RoanokeCT - HartfordMO - Jefferson CityOK - LawtonNE - North PlatteAR - Little RockMT - LewistownLA - New OrleansID - McCallFL - Saint PetersburgSD - PierreAZ - PrescottUT - ProvoOR - RedmondWY - RivertonNV - RenoNM - RoswellTX - San AntonioVA - StauntonKS - SalinaIL - SpringfieldMN - Saint CloudWA - TacomaMS - Vicksburg

Learn About Daily Precipitation

Static mapAnimated mapCA - BakersfieldNY - BinghamtonND - BismarckNH - BerlinTX - BrownsvilleKY - Bowling GreenMI - CadillacNC - CharlotteGA - ColumbusOH - DaytonCO - DenverIA - Des MoinesFL - Key WestVA - RoanokeCT - HartfordMO - Jefferson CityOK - LawtonNE - North PlatteAR - Little RockMT - LewistownLA - New OrleansID - McCallFL - Saint PetersburgSD - PierreAZ - PrescottUT - ProvoOR - RedmondWY - RivertonNV - RenoNM - RoswellTX - San AntonioVA - StauntonKS - SalinaIL - SpringfieldMN - Saint CloudWA - TacomaMS - Vicksburg


By metmike - Feb. 29, 2020, 7:39 p.m.
Like Reply

Current Dew Points


Current Dew Points

                                    

Latest radar loop


http://www.nws.noaa.gov/radar_tab.php

Doppler Radar National Mosaic Loop

                       


 

Upper Mississippi Valley sector loop

  


 (3400x1700 pixels - 2.2mb)
Go to: Most Recent Image

      

Central Great Lakes sector loop
Go to: Most Recent Image

                                  

    You can go to this link to see precipitation totals from recent time periods:


https://water.weather.gov/precip/


                              Go to precipitation, then scroll down to pick a time frame. Hit states to get the borders to see locations better. Under products, you can hit "observed" or "Percent of 

                                    

                                    


By metmike - Feb. 29, 2020, 7:39 p.m.
Like Reply

Soilmoisture anomaly:

These maps sometimes take a day to catch up to incorporate the latest data(the bottom map is only updated once a week).


Wet soils in the Midwest with planting starting in 2 months. Plenty of time to dry out but Spring Storms with heavy precip will be bullish for corn.


https://www.cpc.ncep.noaa.gov/products/Soilmst_Monitoring/US/Soilmst/Soilmst.shtml#

                            

Daily Soil Moisture Pecentile       

        Daily Anomaly Soil Moisture (mm)

        Monthly Soil Moisture Change

https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/regional_monitoring/palmer.gif

https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/regional_monitoring/palmer.gif

                                    

                                    



By metmike - Feb. 29, 2020, 7:42 p.m.
Like Reply

Drought Monitor maps:

Latest: The first map below is the latest. The 2nd one is from last week.


February 27: No drought anywhere in the Midwest.

The maps below are updated on Thursdays.


      https://droughtmonitor.unl.edu/    

                     


                                                                  

Drought Monitor for conus

                                                                    

                                        

                            

                  

                    Drought Monitor for conus                         

        

                                    

            

                

By metmike - Feb. 29, 2020, 7:46 p.m.
Like Reply

The top map is the Canadian ensemble average,  the maps below are the individual members that make up the average at the end of week 2.

+++++++++++++++++++++++++++++++++++++++++

Each member is like the parent, Canadian model operational model.......with a slight tweek/variation in parameters. Since we know the equations to represent the physics of the atmosphere in the models are not perfect, its useful to vary some of the equations that are uncertain(can make a difference) to see if it effects the outcome and how.

The average of all these variations(ensembles) often yields a better tool for forecasting. It's always more consistent. The individual operational model, like each individual ensemble member can vary greatly from run to run.........and represent an extreme end of the spectrum at times. The ensemble average of all the members, because it averages the extremes.............from opposite ends of the spectrum.........changes much less from run to run.

End of week 2....................0z  Canadian ensembles:

Updated 12z maps available this late...........turning colder late week 2 vs previous solutions. Potential for another polar vortex incursion south...on some solutions, mainly this particular model!

Starting with last week below:



Last Saturday: The almost always(this year) too cold Canadian model has REALLY warmed things up late week 2 vs previous forecasts. The average is more zonal, west to east flow which is very mild. Several have a modest ridge W.Canada, trough downstream couplet which would make it much colder in the Midwest..........minority of solutions. No more cross polar flow that is a feature in next weeks cold coming from Canada..........so Canada will REALLY warm up during week 2. 

Sunday: Very mild, zonal flow. Near record warmth in Canada.

Monday: 12z model. Extremely mild, west to east zonal flow. Canada will be especially warm so cold fronts will not be very cold in week 2.

Tuesday: 12z run. Still mild.

Wednesday: COLDER than yesterday. Good bye Southeast ridge! This will allow colder air masses to penetrate more deeply southeast. A minority of members rev up the northern stream and drive it deeply into the US, along with a couple that have the polar vortex coming along for the ride. Those seem too extreme right now. 

Friday: 12z run. Huge differences based on a battle between southern stream and northern stream. One camp is very cold because it emphasizes the northern stream. The other camp is warm from emphasizing the southern stream. This particular solution is slightly colder than the previous one but similar with everything else. 

Saturday:  Similar to yesterday. Will the northern stream or southern stream dominate? With the big ridge in the Southeast dead, my money is on the northern stream. After having a cold bias for 2 months, now, with the ridge vanishing, the last week, the models have been having huge warm bias(too warm).

Sunday: 12z run. Battle between southern and northern streams. A few solutions want to build the ridge back up in the far Southeast. 

Monday: Similar to Sunday. Trough in the middle of the country has retrograded just slightly. Battle between northern and southern stream. Above precip!

Wednesday: Much more southern stream today and milder.  Only a minority still have the northern stream dominant. Significant trough in the Plains..............lots of precip from the Plains, eastward to the East Coast.

Thursday: Same as yesterday. Slightly colder?

Friday: 12z run. Much milder and looky here, the big upper ridge in the Southeast is making a come back after taking a break for a couple of weeks. Deep trough backs up/retrogrades west. Heavy precip midsection!

Sunday: Average is very mild, zonal, west to east flow, although some individual members have an amplified trough in the middle to Rockies. Some have upper level ridge rebuilding in the Southeast. Not too many have much northern stream influence.

Monday: It's all southern stream dominated and an upper level ridge building in the South. The trough out west keeps retrograding/backing up farther west each run. Extremely mild eastern 2/3rds.

Tuesday: Mild. All southern stream. Zonal average but some individual solutions are amplified. Probably not a stable pattern...........it will morph to something else.

Thursday: VERY MILD. All southern stream. Universal agreement  by every member.  How long will this last beyond 2 weeks? Upper trough now just off the West Coast and mild Pacific air spreading across the entire country from west to east. 

Saturday: VERY MILD

360h GZ 500 forecast valid on Mar 15, 2020 12 UTC

GZ 500 forecastGZ 500 forecastGZ 500 forecastGZ 500 forecast

Forecasts for the control (GEM 0) and the 20 ensemble members (global model not available)

By metmike - Feb. 29, 2020, 7:46 p.m.
Like Reply

Individual GFS ensemble solutions for the latest 0z run:

http://mp1.met.psu.edu/~fxg1/ENSHGT_0z/f360.gif

                                    

By metmike - Feb. 29, 2020, 7:50 p.m.
Like Reply

GFS Ensemble mean(average of all the individual solutions above).  The first map is a mid/upper level map. The 2nd one is a temperatures map at around 1 mile above the surface. These are anomalies(difference compared to average).

NCEP Ensemble t = 360 hour forecast



Last Monday:  The favorable ridge/west, trough east couplet from over the weekend has shifted. The ridge west has retrograded west to the Northeast Pacific to Western Alaska. The downstream trough anomaly has shifted a bit east and the 2 are less connected but still are favorable for bitter cold air............even cross polar flow between them to dump into most of Canada. This means cold fronts that can manage to get into the northern tier will have some frigid air.  At the same time, a building positive/ridge anomaly in the Southeast will make it warm there and repel any attempts from the northern stream to send cold air in that direction. This pattern is the recipe for a massive temperature contrast from north to south. Would not be surprized to see near 90 in Florida with near 0 at the same time along the Canadian border. 

Tuesday: Big positive anomaly from Northeast Pacific to Alaska and downstream negative anomaly(in far Eastern Canada...bit far away to be an ideal couplet) should drive cold down thru Canada, with some cross polar flow making it a potent brand of cold. However, the mid latitudes are not at all in sync with that cold from the northern stream getting a good(maximized) push very far east and especially not southeast. The reason is an upper level ridge/positive anomaly in the Southeast which will resist cold intrusions and induce a southerly (south to north movement) component to mid/upper level steering currents in the Southeast 1/3rd of the country. With the amount of frigid air in S.Canada during week 2, its very likely that a good chunk of that will push well south of the US border behind any waves/perturbations in the flow that tug it down with the north to south winds on the backside. 

Wednesday: Positive anomaly in the Northeast Pacific has shifted east to just off the West Coast of Canada. Downsteam negative anomaly is way up in Northeast Canada.......pretty far away for the flow between them to ideally couple and maximize the southward push of cold. Pretty impressive, growing  positive anomaly, centered in the Southeast will make it IMPOSSIBLE for cold air to do anything but make a very brief, very moderated appearance in the Southeast.  Huge temp contrast from cold/north to warm/southeast.

Saturday: 2 positive anomalies. 1 centered  off the Pac NW Coast and another in the Southeast. Modest positive anomalies between them with the nearest negative anomalies many thousands of miles away............having no flow pattern linkage to the positive anomalies anywhere close to the US.  This is the recipe for widespread warmth across North America. No chance for major cold at 2 weeks until this changes.

Sunday: Huge area of positive anomalies stretching across the entire country, with the exception of the far Northeast. This is the recipe for widespread mild weather with Pacific Origin air masses spreading across most of North America. Eastern Canada to the far Northeast might be chilly at times.

Monday: Main positive anomaly is now in the Pac Northwest with some northwest flow down stream but the source region of the air will be very mild.  Maybe the positive anomaly/ridge in the Southeast finally weakens.

Tuesday: Long lived, Positive anomaly/ridge in the Southeast is dead.  This will give that region a chance to cool off a bit but there is no very cold air around.

Wednesday: New, modest positive anomaly in far northwest Canada to almost the North Pole with weak negative anomaly to southeast Canada..............this change in the high latitudes would need to amplify in order to provide a robust flow of frigid southward into the US.....especially the Northeast US. 

Friday:  Modest positive anomalies in the high latitudes and slight weakness in the middle latitudes(USA) suggests air will be able to move from Canada southward. However, the air in Canada will be very mild, so cold fronts may not have true Arctic air. The long lived Southeast US positive anomaly/upper level high has vanished..........consistent with all the other solutions this week. This will allow cold air to the north to penetrate all the way to the Gulf Coast,  instead of it being blocked as was the case since all of this year previously. 

Saturday: The changes noted previously continue to build........lending some confidence. Positive anomalies continue to build across Western to Northern Canada coupled with a nice downstream negative anomaly in the Northeast US.  This is a classical, large scale feature pattern to deliver very cold air, deeply into the US.  Above average anomalies in the high latitudes..........below average in the mid latitudes. This pattern will cause the AO and NAO to become negative, even though those indices are not yet negative today. 

Sunday: This oz run was pretty cold! Much colder than previous runs, much colder than runs after this.  Strong positive anomaly from the Northeast Pacific to NW Canada and slight negative anomaly from SW US W.Cornbelt.  This is actually quite a bit different from yesterday. The 12z run of this same model was much milder.  Though the Euro Ensemble is colder.  Much uncertainty. 

Monday: At the end of 2 weeks, positive anomalies grow again along the East Coast. Main positive anomaly is off the Pac Northwest Coast. Closest negative anomaly of significance is south of Greenland and not an influence for US. 

Wednesday: Moving around a great deal. Positive anomaly retrogrades to the Northwest Pacific with extension into Alaska. Downstream negative anomaly in the center of the US is favorable for widespread  cold air to drop into it but some model runs are more zonal and milder than this. 

Thursday: Same as Wednesday. Cold in the central US!

Friday: Main anomaly is the big positive in the Northeast Pacific. It could potentially couple downstream with a weakness/negative anomaly in the middle of the country and send some cold air down. The last Canadian model has everything shifted much farther west and even builds the Southeast US ridge back.......not so on the GFS ensembles here. 

Sunday: Massive positive anomaly in the N.Pacific has backed up a bit with downstream negative anomaly in the West, especially W. Canada to Alaska.........where the coldest air is most likely to be aimed. Is the upper level ridge in the Southeast going to rebuild?

Monday: Even more massive positive anomaly in the N.Pacific. Downstream neg anomaly West Coast.  Upper level ridge rebuilding downstream of that, in the Southeast. WARM, especially Southeast. 

Tuesday: Huge positive anomaly in the N.Pacific continues to retrograde, forcing all the features to its east, to also back up west. Will this allow a new negative anomaly and cool air develop in the Northeast?  The last few maps suggest that but thats an unreliable period.  Positive anomalies over Greenland/N. Atlantic would  favor that.

Thursday: Huge positive anomaly in the N.Pacific still there. Downstream trough along the West coast, then modest positive anomalies from the Plains eastward........the recipe for very mild temps.

Saturday: Massive positive Anomaly in N.Pacific..........modest positive Eastern North America. Growing negative anomaly north of Alaska. Cold air cut off. 

NCEP Ensemble t = 360 hour forecast product


                                   

https://www.esrl.noaa.gov/psd/map/images/ens/t850anom_f360_nhbg.gif

                                   

                                    


            

                

By metmike - Feb. 29, 2020, 7:51 p.m.
Like Reply

Latest, updated graph/forecast for AO and NAO and PNA here, including an explanation of how to interpret them...............mainly where they stand at the end of 2 weeks.


https://www.marketforum.com/forum/t


Previous analysis, with the latest day at the bottom for late week 2 period.

Discussions, starting with the oldest  below.



Last Monday:  Some changes.  +++++AO drops hard at the end of 2 weeks but still +AO. +NAO also drops a bit late week 2. -PNA actually crosses 0 and becomes positive at the end of 2 weeks.  These would be the changes needed and they must continue in that direction for a better signal of sustained cold..........and we are getting late enough in Winter so that the brand of cold is not going to be as bone chilling.

Tuesday: With PNA finally tuning a bit positive and NAO dropping late, there is a chance for the southeast to cool off a bit. However, solidly positive AO means not much cold air from higher latitudes moving to the middle latitudes so Canada will be mild and cold fronts will not be very cold.

Wednesday: AO and NAO still holding on to positives at the end, though dropping a bit............still not ideal for cold air delivery from high to middle latitudes. PNA close to 0, just a tad positive at the end.                         

Friday: Big changes at the end of the period.  +++AO plunges to near zero at the end of 2 weeks and is still dropping. +AO also drops to near 0 and is dropping. PNA a tad positive. These changes make the environment more favorable for cold to move from high latitudes to middle latitudes in sustained fashion. 

Saturday: AO and NAO continue to drop in week 2. Still just positive at the end but (I think) headed negative in the next few days.  PNA a tad positive can also enhance the NEW set up which will be much more favorable for sustained cold to move from high latitudes(Canada) to.....deeply into the  mid latitudes(US).

Sunday: Record high +++++AO in week 1 plunges towards 0 by the end of week 2. +AO also drops to 0.  PNA close to 0 but edging towards -PNA late.  This was based on 0z guidance. The 12z GFS was so much warmer at this end of week 2 period that I'm taking any solution with a grain of salt now. 

Monday: Record high AO drops hard but stays positive in week 2. NAO and PNA close to 0. 

Wednesday: Record high +++++AO drops but stays ++AO. We need it negative to have confidence in sustained cold.  NAO drops to near 0 from being positive.......more favorable to cold to penetrate deeply into the US. However, the PNA is now morphing negative, which may oppose that.........and bring more cold, farther west.

Thursday: AO stays positive. NAO tiny bit positive. PNA near 0.

Friday: Tenacious very impressive +AO remains which will make it unlikely for extreme cold in high latitudes to be aimed south into the midlatitudes........other than brief incursions. NAO does drop close to 0 which increases changes of cold going south compared to it staying +NAO.  PNA goes negative, which is Not favorable for cold in the east but is for cold in the West. 

Sunday: ++AO stays solidly positive. NAO gets down close to 0. PNA is negative.  This favors cold in the West but not the East. 

Monday: ++AO stays positive. NAO gets down to around 0. PNA negative is growing in magnitude..........cold West, warm east of that.

Tuesday: +AO stays positive but drops a tad. NAO dropping to 0, some potential for -NAO late and cooling Northeast!  PNA solidly negative suggests cold West and warmer downstream.          

Thursday: ++AO does drop late with a couple members around 0. NAO drops to 0 late but unless there is a sharp pattern change at the end of 2 weeks, it will stay mild. Solidly negative -PNA mean cold along the West Coast and very mild downstream, to the east.

Friday: ++AO stays positive.  NAO drops to 0, might mean some cool shots along the East Coast.

By metmike - Feb. 29, 2020, 7:51 p.m.
Like Reply

National Weather Service 6-10 day, 8-14 day outlooks.

 Updated daily just after 2pm Central.


Temperature Probability


6 to 10 Day Outlook - Temperature Probability Precipitation Probability


  6 to 10 Day Outlook - Precipitation Probability


  


the 8-14 day outlooks
ArchivesAnalogsLines-Only FormatGIS Data

Temperature Probability

8 to 14 Day Outlook - Temperature Probability
8 to 14 Day Outlook - Precipitation Probability

            

                                    


By metmike - Feb. 29, 2020, 7:52 p.m.
Like Reply

Previous posts:

Craig Solberg@CraigSolberg·

Winter so far for the Nation...warmest on record (beating 2005/2006)

Image

                      

            +++++++++++++++++++++++++++++++

                Re: Re: Weather Thursday            

         

                By metmike - Feb. 6, 2020, 7:30 p.m.            

            

Eric Snodgrass@snodgrss·

Snowfall anomalies thru Feb 6 compared to the 2008-2018 avg.  Thoughts 1. Sierra Nevada need the Pacific Split to end 2. Central/Northern Rockies ahead 2. Northern Plains have already exceeded a winter's worth of snow 3. Ohio Valley / Appalachians / Northeast wet but not snowy

Image

                                    


            

                

              +++++++++++++++++++++++++++++++++++++++++               

                Re: Re: Re: Weather Thursday            

            

                By metmike - Feb. 6, 2020, 7:32 p.m.            

            

Long-term median number of days per year with snow depth of 1"+ on the ground.

@AlaskaWx

Image

                                    


            ++++++++++++++++++++++++++++++++++++

           

                                    


            


            

                By metmike - Feb. 11, 2020, 3:33 p.m.            

            

                      

NEW:  The long lived upper level ridge in the Southeast US will be breaking down during week 2! This will allow cooler air to affect the East/Southeast. However, air masses will not be very cold coming from the Pacific or from Canada in week 2.

                                    


                      +++++++++++++++++++++++++++

                    

                Re: Weather Wednesday            

                          

                By WxFollower - Feb. 12, 2020, 3:33 p.m.            

            

                            

  The Arctic (80N to 90N) is cooling down again (see image below). Will it finally get to below normal/colder than 245 K (-28 C) with the extreme and long-lasting +AO?? I'm still hoping.

  Note on the image that the coldest day's normal there (per green line) still isn't til ~2/26, when it drops briefly to 242 K (-31 C or -24 F). Also, note that the normal for exactly one month from today (3/12) is still about the same as today's 244 K. So, the point is that the Arctic can still churn out very cold air through about a month from now. That's why if the delivery/upper winds are just right and it is fast enough, it can still get mighty cold even down into the southern US into mid March despite a good bit higher sun by then. March is rarely dull from many perspectives and this is one of the reasons, the battle of the lingering very cold Arctic and the warming in the temperate regions from a higher sun. March, the weather enthusiast's dream month!

  Arctic daily mean temps through today, 2/12/2020:

  http://ocean.dmi.dk/arctic/plots/meanTarchive/meanT_2020.png

 

                                    


            +++++++++++++++++++++++++++++++               

                

                Re: Re: Weather Wednesday            

            

                            By metmike - Feb. 12, 2020, 7:43 p.m.            

            

Great points and graph Larry!


This also illustrates the fact that global warming/climate change is warming the coldest places, during the coldest times of year the most.

Since your graph shows this year, Winter only , I provided a year round temp profile for 2016-2018 below as an example of temperatures in the Arctic for the entire year.................staying milder/less harsh in the normally frigid environment of Winter but then every Summer, temperatures are very close to and sometimes BELOW average. 


The graph below this one shows each year going back over 45 years. You may need to wait a couple of seconds for it to load. What is amazing is that during the "cold" season, temperatures are consistently above to much above average(less harsh) but every Summer they get back to average(and much of the time, even a bit below average. 

So most people may think that its warmer temperatures during the melt season that is melting all the ice but temperatures have frequently been a bit BELOW average during the melt season, which melts less ice.

What is actually happening is that during the rest of the year, during the freeze season temperatures are well above average so not as much of the ice that melted the prior Summer freezes as deeply. This thinner ice, is then easier to melt the next Summer, even with temperatures that are average or even a tad below average(but above freezing and with the sun shining 24 hours a day. 

The ice loss was pretty great up until 2012. Since then it has (temporarily) stabilized. 

We should note too, that SEA ice is already floating in the sea. Melting it does not add much to sea levels(like an ice cube melting in your drink). This is a big reason for why all that melting Arctic sea ice prior to 2012 did NOT cause an acceleration of the rate of sea level increase. 


UAH Arctic Temperature Profile

https://wattsupwiththat.com/2018/11/10/uah-arctic-temperature-profile/


Arctic_DMI_3yrs.jpg



This (painstakingly created) animation shows the DMI above 80N from 1970 thru Oct 2018.  Images sourced from  DMI’s Arctic Temperatures page.

Arctic_temps


                                    



            

Brian Brettschneider@Climatologist49

·

Which month of the year has the Best Weather™?

Image

                                    


            

                

                                                                                    ++++++++++++++++++++++++++++++

      

              

       

If you are wondering why it’s been such a mild winter in the US and many other areas in the mid latitudes look no further. The vigorous polar vortex has all the cold air corraled!


 ·

Near perfect circular symmetry in the strong #PolarVortex right now and very close to being centered right over the North Pole. About as far as you can get from any sort of disruption or split.

++++++++++++++++++++++++++++++++

https://twitter.com/i/status/1229431021457702912

                                    


            

                                                    

                Re: Re: Re: Weather Thursday            

            

    

                            

                By metmike - Feb. 27, 2020, 11:59 a.m.            

            

              

                            


Can you say #fetch?  Amazing "fetch" from Lake Huron across Ontario. Note sure I've ever seen a Lake Effect fetch that focused and defined over such a long distance on the models before. NAM snowfall.

Image

                                    


            

                

By WxFollower - Feb. 29, 2020, 10:41 p.m.
Like Reply

The Arctic’s coldest so far this winter was today at 243K. Models suggest further drops to possibly as low as 240K over the next 3-5 days.


By metmike - March 1, 2020, 10:08 a.m.
Like Reply

Great observation Larry...........thanks.

The temperature anomalies in the Arctic are very cold the next 2 weeks too.  

Part of the +AO and why we will be warm down here in the mid latitudes........all that frigid air is locked/bottled up in the highest latitudes/Arctic!


https://www.esrl.noaa.gov/psd/map/images/ens/t850anom_f216_nhbg.gif