Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
431 PM EDT Tue Mar 25 2025

Valid 00Z Wed Mar 26 2025 - 00Z Fri Mar 28 2025

...There is a Moderate Risk of excessive rainfall over Southern Texas on
Wednesday and Thursday...

...There is a Slight Risk of severe thunderstorms over parts of the
Pacific Northwest on Wednesday...

...Light snow from the Great Lakes to the Northeast on Wednesday into
Thursday...

Two weak fronts will move across the Great Lakes to the Northeast through
Thursday. The boundaries will produce light snow over parts of the Great
Lakes into the Northeast, with the light snow ending over the Great Lakes
by Wednesday night. The snow will continue over parts of Northern New
England through Thursday night. Overnight Wednesday, the second front will
move into the Upper Great Lakes, producing light snow over parts of the
Upper Great Lakes overnight Wednesday into Thursday evening. Furthermore,
light rain will develop over parts of the Lower Great Lakes on Thursday
evening.

Meanwhile, a third front extending from the southern Mid-Atlantic to the
Southern Plains will move eastward off the Southeast Coast by Wednesday
morning and southward to Florida and the Gulf Coast by Thursday. The
western end of the boundary will linger over/near the Western Gulf Coast
by Thursday evening. The boundary will produce light rain from the
Mid-Atlantic to the Ohio Valley early Tuesday night, with the rain ending
by early Wednesday morning. Light snow will develop over the Central
Appalachians by Wednesday morning, ending early Wednesday afternoon.

A weak moisture flow off the Gulf of America will stream northward over
the Southern Plains/Lower Mississippi Valley, producing showers and
thunderstorms over parts of the region overnight Tuesday. Upper-level
energy will develop an upper-level low over Texas on Wednesday night. The
developing upper-level low will pull move moisture off the Gulf of
America, producing showers and thunderstorms with heavy rain on Wednesday
into Thursday. Therefore, the WPC has issued a Moderate Risk (level 3/4)
of excessive rainfall over parts of southern Texas from Wednesday into
Thursday morning. Numerous flash flooding events are possible. Many
streams may flood, potentially affecting larger rivers.

The excessive rainfall threat will continue over the Western Gulf Coast on
Thursday. Therefore, the WPC has issued a Moderate Risk (level 3/4) of
excessive rainfall over parts of the Western Gulf Coast on Thursday.
Numerous flash flooding events are possible. Many streams may flood,
potentially affecting larger rivers.

Furthermore, the moisture over the Gulf Coast will continue northward into
Central Plains/Middle Mississippi Valley, producing showers and
thunderstorms over the region through Thursday evening.

In the meantime, a fourth front over the Eastern Pacific moves onshore
over the West Coast Wednesday afternoon into evening, continuing eastward
to the Northern Rockies to Southern California by Thursday evening.  The
system will produce showers and thunderstorms over the Pacific Northwest
from Wednesday afternoon into Thursday. In addition, some of the
thunderstorms will be severe. Therefore, the SPC has issued a Slight Risk
(level 2/5) of severe thunderstorms over the Pacific Northwest from
Wednesday through Thursday morning.  The hazards associated with these
thunderstorms are frequent lightning, severe thunderstorm wind gusts,
hail, and a few tornadoes. There is an added threat of hail, two inches or
greater over the region.

Showers and thunderstorms will continue over the Pacific Northwest into
the Northern Intermountain Region and Northern Rockies into Thursday
evening. 

Overnight Wednesday, rain will develop over parts of Northern California
and by Thursday morning, after the front passes, snow levels will lower
over the Northwest and California. The storm will produce rain and highest
elevation snow over the Cascades Northern California and the Sierra Nevada
Mountains.


Ziegenfelder


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