Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
400 PM EDT Thu Aug 17 2023

Valid 00Z Fri Aug 18 2023 - 00Z Sun Aug 20 2023

...Anomalous heat shifts from Northwest into Northern/Central Plains;
Widespread record breaking heat wave persists across the Southern Plains
and Lower Mississippi Valley through the weekend...

...Showers, thunderstorms, and an increasing risk of flash flooding for
the Southwest...

...Scattered showers and thunderstorms from Ohio Valley into Northeast
through Saturday...

An amplified upper trough will cut off as it spins through the Northeast
and parts of southeastern Canada over the next couple of days. Scattered
showers and thunderstorms will focus along a surface cold front sweeping
across the Ohio Valley, northern Mid-Atlantic and Northeast. Rainfall
rates shouldn't be high enough to cause flash flooding concerns, however
marginal risks are in effect for much of the Northeast through Friday
night.

An upper trough will swing across southwestern Canada while an upper ridge
expands over the Great Plains and Mississppi Valley over the next couple
of days. Lows in the mid-upper 60s and low 70s may tie or break records
across the Northwest tonight. Widespread record high temperatures are
expected to persist across the Southern Plains and Lower Mississippi
Valley through this weekend.



Kebede

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