Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
414 AM EDT Mon Sep 12 2022

Valid 12Z Mon Sep 12 2022 - 12Z Wed Sep 14 2022

...There are Slight Risks of excessive rainfall over parts of the Upper
Midwest/Great Lakes and Mid-Atlantic/Northeast today...

...There is a Slight Risk of excessive rainfall over parts of the Great
Basin and Intermountain West on Tuesday...

...Midwest, Southwest and Southeast cool down while Great Plains warms
up...

An upper low will cut across the Ohio Valley today, and move into the
Northeast by Tuesday. This low will draw enough moisture up from the Gulf
of Mexico to cause flash flooding concerns over parts of eastern Wisconsin
into northern Michigan as well as from northern Virginia into eastern
Pennsylvania/western New Jersey, where slight risks of excessive rainfall
are in effect. Showers and thunderstorms will be the mode of precipitation
along the cold front, which is forecast to move across the Upper Midwest
and East Coast today. Showers and thunderstorms are forecast for the
Northeast on Tuesday as the cold front moves through the region. High
pressure builds on the backside of the cold front moving across the
Midwest and Ohio/Tennessee Valleys today, sending high temperatures
falling dramatically into the 60s, which will be 15-25 degrees below
average. Temperatures begin to moderate a bit over the Midwest on Tuesday
as an upper ridge shifts into the Plains.

Showers and thunderstorms pick up over the Southwest and Great basin today
as an upper trough begins to move across the region. Localized flash
flooding is possible. The flash flood threat really picks up on Tuesday,
particularly for parts of eastern Nevada and much of Utah where a slight
risk of excessive rainfall is in effect. A shortwave trough moving into
the Pacific Northwest may cause scattered thunderstorms to develop over
portions of northeastern Washington and northern Idaho on Tuesday night.
Upper ridging over the Rockies today will shift into the Great Plains on
Tuesday, dragging warm air along with it. Highs in the 80s over the
Northern/Central Rockies/Plains will be anywhere between 10-20 degrees
above average today, then highs in the 80s to low 90s in the
Northern/Central Plains will be 10-15 degrees above average on Tuesday.

Kebede


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