Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
354 PM EDT Thu Apr 06 2023

Valid 00Z Fri Apr 07 2023 - 00Z Sun Apr 09 2023

...Severe thunderstorms possible across the Mid-Atlantic today...

...Heavy rain with the potential for scattered flash flooding stretches
from South Texas to Lower Mississippi Valley through Friday...

...Unsettled weather forecast throughout much of the Pacific Northwest...

Showers and thunderstorms are moving through the eastern third and
south-central states as a cold front advances eastward today and interacts
with a very warm and moist airmass lifting from the Gulf of Mexico.
Periods of moderate to heavy rainfall with accumulations up to 3 inches
along the Gulf Coast may result is scattered areas of flash flooding. A
Slight Risk (level 2/4) of Excessive Rainfall in effect today includes the
cities of San Antonio, Austin, Corpus Christi, and Houston, TX, as well as
Shreveport, LA. An outside chance for damaging wind gusts and large hail
is also possible within some of the stronger storms today across
south-central/southeast Texas. Some of the storms this afternoon and
evening may become severe across the Mid-Atlantic states. The greatest
chances for severe thunderstorms capable of containing damaging wind gusts
and large hail spans from south-central Virginia to the Delmarva
Peninsula. Here, the Storm Prediction Center has issued a Slight Risk
(level 2/5) of severe thunderstorms. This broad area of convection will
persist from the Deep South/Gulf Coast to the Mid-Atlantic region into the
weekend as the trailing end of the cold front slowly drifts southward to
the Gulf of Mexico. The risk for excessive rainfall and local areas of
flash flooding will shift eastward Friday and Saturday. Meanwhile, a
strong high pressure system builds to the north over the Great Lakes.
Temperatures will cool to below seasonal average through the weekend
across the East behind the cold front

Chilly temperatures along with scattered snow showers continue today
across the Great Lakes region with another round of of potentially
localized heavy snow is possible across a narrow corridor of central
Wisconsin and the Lower Peninsula of Michigan on Friday night just to the
north of a strong warm front, but uncertainty remains high regarding exact
location and amounts at this time. For the West, multiple disturbances
entering the Pacific Northwest will keep wet and unsettled conditions in
store for the much of the Pacific Northwest through Friday. A cold front
and surge of Pacific moisture pushing inland from northern California to
Washington could produce a few inches of rainfall until weakening and
sliding into the Intermountain West on Friday night. Warm air associated
with the system will allow for very high snow levels to reach up to 5000
feet and the potential for snowmelt across lower elevations. Daily
temperatures will warm to near or above average for the central and
western parts of the country.


Campbell


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