…Heavy snow and rain/freezing rain over parts of Northern New England
and snow over parts of the Appalachians on Sunday…
…There is a Slight Risk of excessive rainfall over parts of the
Central/Southern Appalachians and Mid-Atlantic on Saturday…
…There is a Slight Risk of severe thunderstorms over parts of the
Southeast on Saturday…
A wave of low pressure over the Lower Mississippi Valley moves
northeastward to the Mid-Atlantic by Sunday, then out over the Western
Atlantic by Monday. Moisture will surge northward over the Southeast into
the Mid-Atlantic, producing heavy rain. Therefore, the WPC has issued a
Slight Risk of excessive rainfall over parts of the Central/Southern
Appalachians and Mid-Atlantic through Sunday morning. The associated heavy
rain will create mainly localized areas of flash flooding, with urban
areas, roads, and small streams the most vulnerable. Moreover, light snow
will fall over parts of the Lower Great Lakes along the northern edge of
the precipitation shield.
Additionally, showers and severe thunderstorms will develop over parts of
the Southeast. Therefore, the SPC has issued a Slight Risk of severe
thunderstorms over parts of the Southeast through Sunday morning. The
hazards associated with these thunderstorms are frequent lightning, severe
thunderstorm wind gusts, few tornadoes, and a minimal threat of hail.
On Sunday, rain will continue over the Ohio Valley to the Mid-Atlantic and
showers and thunderstorms will develop over parts of Coastal Mid-Atlantic
into Florida. However, the threat of severe thunderstorms and excessive
rainfall will end on Sunday.
Also, as the precipitation shield moves into colder air on Sunday, snow
will develop from parts of the Ohio Valley/Lower Great Lakes to New
England. Heavy snow will develop over parts of Northern New England, while
pockets of rain/freezing rain will develop from parts of eastern New York
State into Southern New England. Snow will also develop over parts of the
Central/Southern Appalachians. By Monday morning, the area of low pressure
will be over the Western Atlantic.
Meanwhile, moisture will stream into the Pacific Northwest and Northern
California, mainly producing rain and highest-elevation snow in a few
places. The rain will continue over the Pacific Northwest through early
Sunday afternoon. The rain will be over by Monday morning.
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