Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
336 PM EDT Mon Apr 25 2022

Valid 00Z Tue Apr 26 2022 - 00Z Thu Apr 28 2022

...There is a Marginal Risk of severe thunderstorms over parts across
parts of the Lower Mississippi Valley and southern/eastern Texas through
Tuesday morning and over the southern Mid-Atlantic on Tuesday...

...There is a Marginal Risk of severe thunderstorms over parts across
parts of the Lower Mississippi Valley and southern/eastern Texas through
Tuesday morning and over parts of extreme southern Texas on Wednesday...

...Temperatures will be 10 to 25 degrees below average over parts of the
Upper Midwest...

A front extending from the Lower Great Lakes southwestward to the
Central/Western Gulf Coast will move off the East Coast by Wednesday. The
boundary will destabilize the atmosphere from the Lower Great Lakes to the
Central/Western Gulf Coast. Therefore, the SPC has issued a Marginal Risk
of severe thunderstorms over parts of the Lower Mississippi Valley and
southern/eastern Texas through Tuesday morning.

The showers and thunderstorms will produce heavy rain along the associated
front on Monday evening. Therefore, the WPC has issued a Marginal Risk of
excessive rainfall with these thunderstorms along the front through over
parts of the Lower Mississippi Valley and southern/eastern Texas through
Tuesday morning. The associated heavy rain will create localized areas of
flash flooding, affecting areas that experience rapid runoff with heavy
rain.

In contrast, high pressure over Central Canada will funnel cold air over
the Upper Midwest, producing temperatures 10 to 25 degrees below average.
The temperatures will begin to moderate on Tuesday. Along with the cold,
light snow lingers over parts of the Upper Mississippi Valley/Upper Great
Lakes through Tuesday evening. On Wednesday, light snow showers move to
the Lower Great Lakes.

The showers and thunderstorms will move southern Mid-Atlantic to the
Central Gulf Coast on Tuesday. As a result, the threat of severe
thunderstorms moves to the region as well as the SPC has issued a Marginal
Risk over the southern Mid-Atlantic.

Meanwhile, a front over the Pacific Northwest will move inland to the
Northern Rockies/Great Basin by Wednesday afternoon. The system will
produce rain and the highest elevation snow over parts of the Northwest,
extending into the Northern Rockies through Tuesday. The rain and higher
elevation snow will be diurnally driven over the area on Wednesday.

Ziegenfelder

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