Weather Tuesday
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Started by metmike - Sept. 11, 2018, 9:41 a.m.

September 11th. A noteworthy day in history! Do something special for somebody to remember this next day! Seriously, don't just think about it for a it today.

The threat is along the East Coast from Hurricane Florence, starting Thursday!!!

New link:

 Scroll down and  enjoy the latest comprehensive weather to the max!!

Drying this week in the Cornbelt but rains late week 1 in Upper Midwest.

 The latest rain forecasts are below...........broken down into each period coming up. Then the 1 week totals.

Day 1 below:

Day 2 below:

Day 3 below:

Days 4-5 below:

 Days 6-7 below:

7 Day Total precipitation below:

http://www.wpc.ncep.noaa.govcdx /qpf/p168i.gif?1530796126

By metmike - Sept. 11, 2018, 9:43 a.m.
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Excessive rain threat taking a break for a couple of days.

The new threat, starting Thursday will be from Hurricane Florence along the East Coast!

Current Day 1 ForecastCurrent Day 1 Excessive Rainfall Forecast

Day 1 Threat Area in Text Format  

Current Day 2 ForecastCurrent Day 2 Excessive Rainfall Forecast

Day 3 forecast below

Current Day 3 Excessive Rainfall Forecast

By metmike - Sept. 11, 2018, 9:43 a.m.
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Severe Storm Risk. Pretty low.  Hit the map for full screen.

Current Day 1 Outlook
        1300 UTC Day 1 Outlook             
          Current Day 2 Outlook
          0600 UTC Day 2 Outlook               
          Current Day 3 Outlook
          0600 UTC Day 3 Outlook               
          Current Day 4-8 Outlook
          Day 4-8 Convective Outlook
By metmike - Sept. 11, 2018, 9:46 a.m.
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High Temperatures today and Wednesday.   Hot Southwest, spewing into the Plains. Pleasant but then warming.


By metmike - Sept. 11, 2018, 9:50 a.m.
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Highs days 3-7. Very Warm Midwest, Hot South, Florence East!

New cold surge Northwest, then Northern Plains/Upper Midwest late in this period.

By metmike - Sept. 11, 2018, 9:52 a.m.
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How do these days 3-7 temperatures compare to average at this time of year?  We are now 7 weeks past the climatological time of year when temperatures are the hottest.

 Warming up again next week to well above average.............but average in mid September is not that hot anymore. With low storage, it's still possible to give a bullish kick to natural gas if it was going to last.

Very cool Northwest to N.Plains.

High temperature departures:

Low Temperature Departures:

By metmike - Sept. 11, 2018, 9:53 a.m.
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Dew points. 70+ on this scale makes it feel uncomfortable(sticky air)!  

Humid air has been showed to the Gulf Coast and Southeast.

Current Dew Points

By metmike - Sept. 11, 2018, 9:55 a.m.
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Cool Canadian High Pressure in the Midwest.  Warm and dry winds on the backside in the Plains. Florence chugging west in  the Western Atlantic.

Current US Surface Weather Map

By metmike - Sept. 11, 2018, 9:55 a.m.
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Here is the latest radar image.

Doppler Radar National Mosaic Loop

By metmike - Sept. 11, 2018, 9:57 a.m.
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Satellite picture.      

Very well defined Florence in the Atlantic is showing up and taking aim on the East Coast!!!

US Infrared Satellite Map



By metmike - Sept. 11, 2018, 9:58 a.m.
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Rains the past 24 hours.  Eastern US. Deep South.

By metmike - Sept. 11, 2018, 9:58 a.m.
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You can go to this link to see rain 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"

By metmike - Sept. 11, 2018, 10 a.m.
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Too wet in a huge area from massive September rains!

Drier this week, which will minimize the problems to the crops.

By metmike - Sept. 11, 2018, 10:02 a.m.
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Below are rains compared to average of the last 7, 14, 30 and 60 days. Usually not updated for previous day until late the next day.

Bountiful rains for most of the Cornbelt..............and points eastward and westward. This increased yields in August!!!

But September brought too much rain!  Drying out now.

By metmike - Sept. 11, 2018, 10:04 a.m.
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Drought Monitor. This product is updated every Thursday. Drought has been shrinking but still persists in Texas.........this measure takes into account the long term precip/sub soil moisture and goes back over MANY months.


Drought Monitor for conus

By metmike - Sept. 11, 2018, 10:10 a.m.
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Temperature Anomalies from GFS ensembles(fairly reliable product) going out 2 weeks. These maps show the Northern Hemisphere. The map of the US is front center. Look for the state borders in  white.

Today/tomorrow:      Hot Southwest moving into N.Plains. Cool Northwest.
NCEP Ensemble t = 024 hour forecast product

In 5+ days:

Very warm/hot air surge. Cold in Canada hitting Northwest to N.Plains.
NCEP Ensemble t = 144 hour forecast product

In 10+ days:

Cold in Canada! Positive Anomalies in US.
NCEP Ensemble t = 264 hour forecast product

Day 15  Small Positive anomalies. Bearish.  Warmth in LATE September is not like heat in LATE July!

NCEP Ensemble t = 360 hour forecast product

By metmike - Sept. 11, 2018, 10:18 a.m.
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The top map is the ensemble average, the maps below are the individual members that make up the average

End of week 2....................0Zz ensembles from Tuesday showing 500 mb heights below(mid/upper levels).  Ridge building Rocking to N.Plains, troughing East.


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.

360h GZ 500 forecast valid on Sep 26, 2018 00 UTC

GZ 500 forecastGZ 500 forecastGZ 500 forecastGZ 500 forecast

By metmike - Sept. 11, 2018, 10:21 a.m.
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The low skill, longer range CFS model for weeks 3 and 4.

Extremely  impressive upper level ridge in Western Canada to Central Canada for the 2nd day in a row. Cool in the East very dry in the Cornbelt which would accelerate harvest.

Septembers gradually gets cooler, almost every year. Heating degree days(from cold weather) will soon be replacing cooling degree days(from hot weather) as being the most important as we get into October.

Check in tomorrow to read something different............."low skill" (-:

Precip below:

By metmike - Sept. 11, 2018, 3:28 p.m.
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NWS Week 2 maps below.  Nothing exciting. Cooling off a bit in the northern border states. Still very warm south. Rains increasing in some places but no heavy rain signal.

The grains will be trading harvest weather now at times. Time to start watching South America pretty soon!

6-10 day Temperature Probability

6 to 10 Day Outlook - Temperature Probability
 Precipitation Probability

  6 to 10 Day Outlook - Precipitation Probability

8-14 day Temperature Probability

8 to 14 Day Outlook - Temperature Probability
 Precipitation Probability

  8 to 14 Day Outlook - Precipitation Probability
By metmike - Sept. 11, 2018, 3:30 p.m.
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(very) Extreme weather days 3-7.  Hurricane Florence and the remnants will be the highlight, especially bad, starting Thursday.

By metmike - Sept. 11, 2018, 7:11 p.m.
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The GFS continues farther north/right, the European model farther south/left with the track after Saturday.

Here are the NWS days 3-7 maps for surface features and total rain. Looks much closer to the GFS. That pink on the rain total map is the 20 inch contour!

By metmike - Sept. 12, 2018, 12:54 a.m.
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Latest GFS has the excessive rains confined to right along the NC coast.