Happy September 5th! Do something especially nice for somebody.......... Then think about how you made their world better!
Scroll down and enjoy the latest comprehensive weather to the max...... occurring because of the natural physical laws in our atmosphere.
See Hurricane Dorian updates here:
Dorian is clobbering the S/NC coasts today/tonight then VA on Friday then out to sea late on Friday.
TX drought is hurting cotton.
No frost threat for grains. Crop ratings +1% corn, unch for beans. Getting late in the year for weather.
For natural gas:
Enough heat to generate significant cooling demand in some places(southern half of the US). Clearly Bullish still! EIA report was bearish this morning.
Here are the latest hazards across the country.
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"
Current Weather Map
|NCEP Days 0-7 Forecast Loop||NCEP Short-Range Model Discussion||NCEP Day 3-7 Discussion|
Wind map Press down on this on the left with your cursor!
Current Jet Stream
|Low Temperatures Tomorrow Morning|
Highs today and tomorrow.
Hot in the South and West. Cool Great Lakes to Northeast.
Highs for days 3-7:
Hot in the South!!!! Cool northern tier.
We have passed the peak in Summer temperatures based on climatological/historical averages by well OVER a month now.
Hot southern half!!!!!
Weather maps for days 3-7 below
Dorian long gone to sea. Intense heat Southern half. Rains increase in the North.
Liquid equivalent precip forecasts for the next 7 days are below.
Heavy hurricane rains NC/SC to southeast VA today/early Friday.
Rain in the Midwest pick up this weekend in the north and increase next week.
Day 1 below:
Day 2 below:
Day 3 below
Days 4-5 below:
Days 6-7 below:
7 Day Total precipitation below:
Risk of excessive rains.
Southeast to MidAtlantic coasts and just inland, high threat from Dorian Thursday
and early Friday!
|Current Day 1 Forecast|
Valid 16Z 08/30/19 - 12Z 08/31/19
|Day 2 and Day 3 Forecasts|
|Current Day 2 Forecast|
Valid 12Z 08/31/19 - 12Z 09/01/19
|Current Day 3 Forecast|
Severe Storm Risk the next 8 days:
Strong storms possible ahead of Dorian along the coast.
|Current Day 1 Outlook|| Forecaster: Grams/Leitman|
Valid: 30/1300Z - 31/1200Z
Forecast Risk of Severe Storms: Marginal Risk
| Current Day 2 Outlook|| Forecaster: Mosier|
Valid: 31/1200Z - 01/1200Z
Forecast Risk of Severe Storms: No Svr Tstms
| Current Day 3 Outlook|| Forecaster: Mosier|
Valid: 01/1200Z - 02/1200Z
Forecast Risk of Severe Storms: No Svr Tstms
| Current Day 4-8 Outlook|
Last 24 hour precip top map
Last 7 day precip below that
Current Dew Points
Dry, low humidity well south of the Ohio River, moisture coming back north in the W.Gulf states to E.Plains.
Latest radar loop
| (3400x1700 pixels - 2.2mb)|
Go to: Most Recent Image
Go to: Most Recent Image
You can go to this link to see precipitation totals from recent time periods:
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 normal"
Precipitation compared to average for the last 7, 14, 30 and 60 days.
Some spots in Iowa and especially N/C Illinois have dried out!
Usually not updated for previous day until late the next day.
These maps sometimes take a day to catch up to incorporate the latest data(the bottom map is only updated once a week).
Latest: The first map below is the latest. The 2nd one is from last week.
In july/August/Sept, it's typical to see some increase in drought because of heat being a factor in evaporation, seasonally exceeding low rainfall during this month.
TOP MAP SHOWS DROUGHT INCREASED A BIT IN THE LAST WEEK in the central Cornbelt. Not unusual for early September.
TX and cotton have the worst drought.
The map below is updated on Thursdays.
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 ensembles:
Analysis starting from a week ago, ending with today:
Last week+ of analysis, starting with the day farthest in the past. This is an end of week 2 forecast!
Last Monday: Heat ridge in the Southeast is stronger today.......carried on a couple more solutions and a slight majority.
Tuesday: On this model, the heat ridge in the Southeast is more impressive again today. Trough in the west. This couplet, if amplified more could lead to some heavy rains between the 2 features with a decent jet stream................at a time of year that is often pretty dry.
Wednesday: Less ridging in the south on this model today. More zonal flow northern tier.
Thursday: A tad more ridging in the Southeast. No frost threat.
Friday: Much less ridging in the Southeast. More troughing Great Lakes.
Saturday: Much deeper trough, even south of the Midwest.........at least on this run, with the heat ridge only in the far south...........on the average. The other models don't look this cool.
Sunday: MUCH MUCH stronger ridge in the Southeast. More like other models. Yesterday's solution from the Canadian ensembles looks like it was out to lunch.
Monday: Big heat ridge Southeast on half the solutions.
Tuesday: In contrast to the other models, this model cools it off at the end of week 2. Upper level trough Midwest/Great Lakes. However, a significant number of solutions, still minority have the opposite pattern........so no confidence in the Canadian model today.
Wednesday: Not as warm as the other models(that are pretty warm) this one with more troughing in the Midwest to Northeast.
Thursday: Less troughing Midwest to Northeast and warmer, like the other models now. Heat ridge in the South!
360h GZ 500 forecast valid on Sep 20, 2019 00 UTC
0Z GFS Ensembles at 2 weeks:
Analysis, starting with the oldest, ending with the most recent:
Last Thursday: Where will the deep trough in Canada and associated strong jet stream into at least the northern tier of the US be? Potential heat ridge farther south of this feature if it would stay west or track zonally along the US border. Solutions here strongly favor a buckling of the jet deeply into the central of the country.
Friday: How deeply into the US will the big trough in Canada penetrate? Where will this be at? Northcentral US looks likes the most likely.
Saturday: Preferred position for the big upper level trough today is around the Hudson Bay in Canada, extending pretty far south across the US border.
Sunday: Not clear. Upper level trough in Canada, strong jet underneath, potential heat ridge somewhere in the US.
Monday: Upper level ridging, maybe in the Southeast. No longer the pronounced troughing in the N/C US. Not as cool as last weeks maps.
Tuesday: This model has a bit more northern stream potential than the Canadian model.......at least on this particular run. That's what's needed to have frost potential.
Wednesday: More zonal look to jet stream along the northern tier vs an amplied pattern that would be needed to pull down much colder air(which is absent in the US today)
Thursday: Ridge in the south could expand. Upper level trough/low Pacific Northwest is agreed on by most models...........favors downstream ridge amplification if the northern stream doesn't interfere which looks to be the case.
Friday: Alot of spread and movement. Nothing extreme/unusual.
Saturday: Much different than the Canadian model with the heat ridge pronounced, pumped up on this run of this model, along with the potential of a slug of heat.......for a few days.
Sunday: Yesterday, this model was much warmer than the Canadian model, today, it's not as warm. We went from an upper ridge in the upper Great Lakes to a weak trough today.
Monday: Ridge southeast. Trough in Canada
Tuesday: Heat Ridge Southeast and vicinity. Deep trough in Canada. Heat in the south!
Wednesday: Same as Tuesday. Hot in the South!!
Thursday: Heat ridge shifts a bit west late week 2. We'll see if it means anything with future model runs.
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). The daily analysis starts with the oldest and ends with the latest.
Last Saturday: Center for the positive anomaly is now in SW Canada to just off the coast to the Gulf of Alaska with a downstream negative anomaly centered in the Great Lakes. This is usually a pretty good couplet for cool temperatures in the Midwest.
Sunday: Weaker positive anomaly off the West Coast of North America, weak negative anomaly around the Midwest. Not a strong signal for heat but neither is it especially cool.
Monday: The only significant anomaly is a positive one off the Pac NW Coast. Otherwise, near average and nothing strong to key off of. Probably a strong jet stream along the northern tier.
Tuesday: Positive anomaly again is off the Pac NW Coast. Slightly below average heights and cyclonic flow in the center of the country........so wet and cool.
Wednesday: Same as Tuesday. Positive anomaly off Pac NW Coast, modest positives along the East Coast, negative with trough in the middle of the country where is would be wet and cool.
Thursday: Similar to Wednesday. Positive anomaly off the Pac NW Coast. Negative anomaly from Hudson Bay, extended to a weakness in the Midwest. Slight positive in the Southeast, possible ridging ahead of the deep trough.
Friday: Still the modest positive anomaly off the Pac Northwest Coast. Upper trough to the east has so many variations, that it doesn't show up with that big of a negative departure in 500 mb heights average in any one place.
Saturday: Modest positive anomaly but growing/extensive all the way north across North America........modest negative anomaly downstream from north of the Hudson Bay, southward. If these anomalies increase in magnitude, they would make for a nice couplet to deliver northern stream driven cold waves southward after the first week in September.
Sunday: Yesterdays couplet is gone. Slight negative anomaly sw Canada. Modest positive anomalies US, downstream so probably warming up in the middle of the country.
Monday: Similar to Sunday. No strong anomaly disparities to key off of. Maybe just zonal flow across the US, especially northern half and not as cool in the Midwest as recent week 2 maps.
Tuesday: Negative anomaly now just off the US West Coast. Could be associated with an active jet stream aimed at parts of the Midwest? Modest positive anomalies downstream. Another positive anomaly in Alaska is going to have to get some/better cooperation downstream to connect strongly enough in order to deliver a blast of chilly air thats cold enough for frost in the Upper Midwest. There is a slight weakness in E.Canada that has potential.
Wednesday: Anomalies are pretty close to average everywhere. So, flat zonal flow in the north and no extremes with ridging favored far south and an upper level trough in Canada which is typical in September.
Thursday: Negative anomaly Pacific Northwest stands out/is agreed upon. Modest positive anomalies downstream, some ridging in the south likely.
Friday: Negative anomaly Pac NW as vanished. Modest positive anomalies most places.
Saturday: New positive anomaly in the Great Lake and vicinity with heat in the Midwest late week 2(after a shot of chill a week previous to that).
Sunday: Positive anomaly in the Great Lakes is now no longer. Not much to key off of.\
Monday: Positive Northeast....slight. Slight negative Gulf of Alaska, actually too small to be meaningful.
Tuesday: Modest positive anomalies across the country. Favorable for widespread warmth. No chance for a freeze with this pattern.
Wednesday: Positive anomalies everywhere. Widespread warmth. No chance for a freeze.
Thursday: New, positive anomaly in the N.Rockies. Is the upper level ridge shifting east, last week 2???
NCEP Ensemble t = 360 hour forecast
Latest, updated graph/forecast for AO and NAO here, including an explanation of how to interpret them...............mainly where they stand at the end of 2 weeks.
Previous analysis, with the latest day at the bottom for late week 2 period.
Last Monday: No strong signal or suggestion of anomalous type weather.
Tuesday: AO and NAO near 0. PNA has a wide spread as that indice is very sensitive to the pattern/positions of an upper level trough and ridge in Western North America.
Wednesday: AO drops to near 0. NAO near 0 and PNA drops from positive to near 0 at the end of 2 weeks. Nothing at all suggested out of the ordinary.
Thursday: AO drops from positive to near 0. NAO near 0 and PNA stays bit positive with a wide spread its sensitive to the upper level trough off the NW Coast's position relative to features surrounding it.
Friday: AO and NAO near 0. PNA a bit above 0.
Saturday: AO, NAO and PNA all slightly positive. Late week 2 is uncertain.
Sunday: AO, NAO drop to near 0. PNA slight positive. Nothing to go on.
Monday: Same as Sunday.
Tuesday: Negative AO. Near 0 NAO. Positive PNA.
Wednesday: Negative AO, Near 0 PNA, Positive PNA again.
Thursday: AO and NAO near 0. PNA a bit positive.
National Weather Service 6-10 day, 8-14 day outlooks.
My comments below are usually made hours before the afternoon update, starting with the oldest comment.
Last : Monday: Not as cool, closer to average Midwest? Fairly dry in the 6-10 day.
Tuesday: After turning drier early in the extended, it looks to turn wet. Temps? Not as cool in the middle as last weeks outlooks but there is uncertainty.
Wednesday: Dry start to the 6-10 day, then turning wetter again, especially 8-14 day. No temp extremes but not as cool in the middle as recent outlooks.
Thursday: Turning wetter again. More warmth than cool, especially south.
Friday: GFS products/tools are cool Midwest to East but there's a case to be made for warmer by the European ensemble. Precip uncertain.........could go either way.
Saturday: Cold start from late week 1, then turning warmer. Heaviest rains Plains/Upper Midwest.
Sunday: Chilly start Great Lakes/Northeast then big warm up. Increasingly wet Upper Midwest/N/C.Plains?
Monday: Warm south, spreading north. Wet northern half, dry southern half.
Tuesday: Warm, hot actually in the Southeast/South. Dry southern half. Turning wetter northern half.
Wednesday: Similar to yesterday. Hot/dry South. Wet North.,
Thursday: Hot/South, Wet North................on these outlooks but the upper level ridge may be shifting west in future outlooks.
|the 8-14 day outlooks|
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