Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
231 PM EDT Sun Apr 06 2025

Valid 00Z Mon Apr 07 2025 - 00Z Wed Apr 09 2025

...A lingering concern for heavy rainfall and flash flooding will exist
over the Southeast and portions of the Gulf Coast through tonight...

...Severe weather concerns will persist into Monday across portions of the
Southeast...

...Wintry weather with some accumulating snowfall expected around the
Great Lakes and parts of the Northeast...

...Unsettled weather impact the Pacific Northwest and northern Rockies
through the early part of this week...

After several days of extreme rainfall and devastating flooding across
parts of the Ohio Valley, Mid-South, Middle and Lower Mississippi Valleys,
there is still some threat for heavy rainfall and flash flooding for
portions of the Southeast and the Gulf Coast region going through this
evening and overnight. This will be caused by a slow-moving frontal zone
with multiple waves of low pressure riding along it which will be focusing
slow-moving areas of heavy showers and thunderstorms. The Weather
Prediction Center has depicted a Moderate Risk (level 3/4) of excessive
rainfall across areas of central and southern Alabama with a broader
Slight Risk (level 2/4) across adjacent areas of the interior of the
Southeast and the central Gulf Coast region going into tonight. Some
severe weather will be possible as well across this region, and the Storm
Prediction Center has depicted a Slight Risk (level 2/5) of severe weather
over many of the same areas with concerns for locally damaging winds and
an isolated tornado. Overall, the excessive rainfall rainfall threat will
diminish going into Monday as this front and associated waves of low
pressure begin to clear through the Southeast U.S. and move offshore. A
lingering threat for some severe thunderstorms will exist over the coastal
plain of the Southeast on Monday with some damaging wind potential before
the front passes through.

Meanwhile farther north on the cool side of this front, some light to
moderate rains will overspread parts of the Mid-Atlantic in connection to
the close proximity of low pressure just to the south. However, areas of
the Great Lakes and Northeast will be seeing the arrival of much colder
temperatures behind a cold front, and this will bring a threat for some
lake-effect snowfall downwind of the lakes and into some of the upslope
areas of the the northern Appalachians. This will be also influenced by a
deepening area of low pressure near New England and over the Canadian
Maritimes which will facilitate some snowfall across the far northern
Mid-Atlantic and especially New England. Overall, accumulations will be
rather light, but locally several inches of snow will be possible over the
higher elevations and also where any heavier lake-enhanced snowfall sets
up. Some concerns for even little bit of late-season sleet and freezing
rain will be possible locally for parts of the interior of the Northeast
before low pressure finally moves away from the Northeast. Temperatures
for the start of the new week will be below normal across much of the East
and the South, but overall, the pattern will turn much drier and more
tranquil compared to the last several days.

Elsewhere, a series of fronts will bring episodes of unsettled weather to
the Pacific Northwest, and the northern Rockies going through Tuesday.
These frontal systems will bring Pacific moisture inland with intermittent
shower activity. Rain will fall across coastal locations and the lower
elevations while snow will occur over the high country. The heaviest
snowfall will be confined to the higher elevations of the Olympic
Mountains and the Cascades where an additional 1 to 2+ feet can expected
over the couple of days.

The remainder of the country should be dry for the next couple of days,
but generally warm, with temperatures across much of the Southwest,
Intermountain West and the High Plains seeing temperatures trending above
normal. This will include some portions of the Desert Southwest seeing
high temperatures by Tuesday reaching well into the 90s.

Orrison


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