Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
415 AM EDT Fri Aug 25 2023

Valid 12Z Fri Aug 25 2023 - 12Z Sun Aug 27 2023

...Dangerous heat continues from the Midwest to Gulf Coast, with relief
finally on the way for some by this weekend...

...Excessive Rainfall leading to Flash Flooding possible across portions
of the Central High Plains today...

A very dangerous heat wave will persist for just one more day across the
Midwest before retreating into the Gulf Coast this weekend. The
upper-level ridge, which supports this anomalous warmth across the
Mississippi Valley and Midwest will retract toward the Great Plains and
western U.S. this weekend. In the meantime, high temperatures in the upper
90s to 100s will tie or break existing records from the Midwest down to
the Gulf Coast states today, with the highest concentration of record
rivaling temps occurring over the Lower Mississippi Valley and east Texas
through the end of the weekend. A cold front will provide relief to much
of the Upper Midwest today and Saturday to the Middle Mississippi Valley.
Widespread record low minimum temperatures are also expected from the
Midwest to the Gulf Coast during this period due in part to increased
cloud cover overnight from the aforementioned cold front. Do not
underestimate the potential for heat-related illness--have a way to break
your heat exposure, cool down, and stay hydrated! Heat begins to build
back over the West this weekend. Excessive heat watches are in effect over
portions of the Desert Southwest.

Shortwave energy, associated with the remnants of Harold embedded within
the upper ridge centered over the Southern Plains, will trigger scattered
shower and thunderstorm activity over parts of the Central/Southern
Rockies and Great Plains this afternoon and evening. Anomalous moisture
associated with this system will interact with a surface cold front and
may generate some storms capable of producing 1"/hr rain rates and 1-2" of
total rainfall with locally higher amounts possible in the foothills. A
Slight Risk of Excessive Rainfall leading to Flash Flooding is therefore
in effect from parts of eastern Colorado to southeastern Wyoming to
western Nebraska/Kansas.

Elsewhere, scattered to isolated showers and thunderstorms are possible
across the Northeast today with lingering chances on Saturday as the cold
front moves into the Atlantic.

Kebede

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