Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
256 PM EDT Tue Sep 26 2023

Valid 00Z Wed Sep 27 2023 - 00Z Fri Sep 29 2023

...Below average temperatures to persist across the Pacific Northwest into
the Northern Rockies and across the Mid-Atlantic and Southeast...

...Above average temperatures expected across from the Southwest, through
the Rockies, Plains, Mississippi Valley, Upper Lakes and northern New
England...

...Wet weather to  continue across much of Florida into the coastal
Southeast, across the Mid-West into the Ohio Valley and across the Pacific
Northwest...

The first full week of fall will continue to show big temperature
differences across the nation with generally below average temperatures
along portions of the east coast and Pacific Northwest and above average
temperatures in between.  A series of cold fronts have been moving off the
northeast Pacific and into the northwestern U.S,  providing much needed
rains to regions currently in extreme to exceptional drought conditions
and also resulting in temperatures well below average.  High temperatures
over the next few days are forecast to remain 10 to 15 degrees below
average from northern California, across the Pacific Northwest and into
the Northern Rockies.

Below average temperatures also expected to persist into mid week along
portions of the east coast where low level clouds remain stuck from a
combination of cool surface high pressure nosing southward from southeast
Canada and a nearly stationary surface low spinning off the Mid-Atlantic
coast. 

In between the two regions of below average temperatures, above average
warmth will stretch from the Southwest, through the Rockies, Plains,
Mississippi Valley, Upper Great Lakes and into Northern New England. 
While no record highs are anticipated across these regions, temperatures
will be more summer like than fall like.  These areas will also remain
dry, bringing no relief to the extreme to exceptional drought conditions
that stretch across large portions of the Southern to Central Plains,
Upper and Lower Mississippi Valley and portions of the Southwest.

In contrast, wet weather will continue over the next few days across much
of Florida into the coastal Southeast where above average moisture values
will continue to be transported northeastward across these regions on the
eastern side of a mid to upper level low across the Gulf of Mexico. A slow
moving mid to upper level low across the Great Lakes into the Ohio Valley
region will also keep conditions wet across these regions over the next
few days.  In both regions of wet weather, areas of heavy rains may
produce isolated flash flooding, especially in urbanized regions.

Oravec

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