Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
400 PM EDT Wed Apr 09 2025

Valid 00Z Thu Apr 10 2025 - 00Z Sat Apr 12 2025

...Mixed rain/wet snow from the Great Lakes to interior New England will
be followed by a drenching cold rain on Friday over the Mid-Atlantic...

...Below normal temperatures continue across the East while well above
normal and near-record warmth builds across the West...

...Severe weather expected across portions of the Mid/Deep South and
Tennessee Valley on Thursday...

...Unsettled weather persists over the Pacific Northwest...

The main weather maker over the next couple of days across the country
will be a low pressure system that is forecast to progressively develop
over the eastern U.S.  The unusually chilly temperatures across much of
the eastern U.S. today are setting up for the development of mixed rain
and wet snow from the Great Lakes to interior New England through the next
of couple of days as the developing low pressure system passes well to the
south.  It will take a couple of days for the two main pieces of
upper-level troughs dipping into the mid-section of the country to
consolidate over the eastern U.S. on Friday.  As these troughs begin to
merge over the Mid-South, extra instability is forecast to trigger rapid
development of strong to possibly severe thunderstorms late on Thursday
into early on Friday.  By Friday, a low pressure system is forecast to
intensify as it begins to track northeastward up into the Mid-Atlantic
region where a drenching cold rain is expected to develop and expand
northeastward.  The increasing northeasterly winds will make for a gusty
and rainy end on Friday across the northern Mid-Atlantic while the
southern Mid-Atlantic will come under an increasing threat of strong
thunderstorms as southerly flow strengthens ahead of a sharpening cold
front.

In stark contrast, a large upper-level ridge will build over the western
U.S. the next few days, resulting in mainly dry weather and well above
normal temperatures. In fact, high temperature anomalies across the West
will climb to between 10 and 30 degrees above seasonal normal through
Friday, translating to highs in the 50s and 60s across the far
north/Pacific Northwest, to the 70s and 80s outside of the mountains
farther south, to the 90s and lower 100s across portions of the Desert
Southwest and southern Plains. High temperatures may even approach or
possibly break records for many places Thursday, Friday and into the
weekend.   

Meanwhile, unsettled weather is forecast to continue over the Pacific
Northwest as fairly energetic fronts ahead of Pacific cyclones arrive at
regular intervals and ride up the northern extent of the strong upper
ridge in the Southwest.  The next wave of moisture is forecast to move
into the region on Thursday before the system pushes farther inland with
high-elevation snow from the interior Pacific Northwest into the northern
Rockies from Thursday night into Friday.

Kong/Miller


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