Short Range Forecast Discussion...amended
NWS Weather Prediction Center College Park MD
511 PM EDT Thu Sep 22 2022

Valid 00Z Fri Sep 23 2022 - 00Z Sun Sep 25 2022

...Cold front brings a high quality airmass to most of the eastern states
Friday into the weekend...

...Monsoonal moisture lingers across parts of the Desert Southwest with
some additional flooding potential...

A strong cold front currently near the East Coast Thursday afternoon will
herald a change to a truly autumnal airmass for nearly all of the eastern
U.S. to end the week.  This will be accompanied by a strong upper level
trough and highs will easily be 15-25 degrees cooler compared to recent
days, which will equate to widespread 60s and 70s during the day, and 40s
and 50s at night as the large surface high settles in.  Some frost will
even be possible for some of the inland valleys of the central and
northern Appalachians with clear skies and light winds, and also for
northern Wisconsin and northern Michigan where freeze warnings are in
effect.  The exception will be the Florida Peninsula where the front is
expected to stall, with heat and humidity remaining in place going into
the weekend.  Temperatures will likely be above average across most of the
Plains going into the weekend, with highs reaching into the 90s for much
of Texas and Oklahoma.

In terms of precipitation, some light to moderate rainfall is expected
across the Dakotas and into the Upper Midwest as a low pressure system
crosses the region and advects moisture northward, but nothing too heavy
is currently expected at this time.  Scattered to numerous showers and
storms will remain across mostly eastern Arizona and northern New Mexico
through mainly Friday night, with flood watches remaining in place for
parts of these areas.  Showers and storms are also expected to persist for
central and southern Florida with moisture convergence south of the
stalled front.  Elsewhere, a high wind watch is in effect for eastern
Maine since this area will be on the far western edge of powerful
Hurricane Fiona as it undergoes extratropical transition over Nova Scotia
and Newfoundland, and rip currents will remain a problem for much of the
East Coast through the end of the week.

Hamrick



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