Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
320 PM EDT Tue Oct 25 2022

Valid 00Z Wed Oct 26 2022 - 00Z Fri Oct 28 2022

...Heavy rain and strong to severe storms expected through Wednesday night
ahead of eastern U.S. cold front, followed by improving weather...

A well defined upper level low will track across the Ohio Valley tonight
and then become absorbed by the westerlies on Wednesday, with a trailing
cold front crossing the eastern third of the nation and exiting the East
Coast Wednesday night.  The most impactful weather is expected to occur
between now and early Wednesday.  The Storm Prediction Center has a Slight
Risk of severe thunderstorms through tonight across portions of the Deep
South and Tennessee where the best combination of instability and dynamics
will exist.  The thunderstorm threat wanes considerably going into
Wednesday and beyond as forcing for ascent decreases.  In terms of heavy
rain prospects, a corridor of moderate to heavy rainfall is forecast from
Illinois to western Lower Michigan through Wednesday afternoon, with some
1-2 inch rainfall totals possible.  Much of this will be beneficial
rainfall for areas that have been quite dry recently, so this will tend to
mitigate the potential for flooding.

The weather pattern will be more uneventful across the remainder of the
nation as a large surface high will reside across the Plains and result in
sunny to partly cloudy skies for most areas west of the ongoing Eastern
U.S. storm system.  The exception to this will be across the Cascades and
portions of the Northern/Central Rockies where a couple of mid-upper level
impulses will generate some mountain snow showers, with several inches of
accumulation possible for the higher terrain, mainly through Wednesday
evening. 

In terms of temperatures, readings are expected to be generally above
normal across the Eastern U.S., with the greatest anomalies across New
England where temperatures could be 20 degrees above normal on Wednesday. 
Cooler than average readings will likely continue across most locations in
the Western U.S. as the upper level trough remains over this region.

Hamrick

Graphics are available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php