…Wet snow over parts of the Upper Midwest to the Northeast and Central
Appalachians…
…There is a Marginal Risk of excessive rainfall over parts of the
southeastern Florida Peninsula on Sunday…
…There is a Marginal Risk of severe thunderstorms over parts of the
Central Appalachians on Sunday…
A front extending from the Northeast southwestward to the Southern Plains
moves eastward to off most of the Eastern Seaboard by Tuesday evening.
High pressure over Central Canada will move southward to the Central
Plains/Middle Mississippi Valley by Monday. The clear sky and calm wind
associated with the high have triggered Freeze Warnings, Advisories, and
Watches over parts of the Northern and Central Plains.
Upper-level energy associated with the boundary will produce rain from the
Northeast to the Upper Mississippi Valley through Tuesday evening. Wet
snow will develop over parts of the Upper Mississippi Valley through late
Monday night and the higher elevations of the Northeast through Tuesday
evening. In addition, wet snow will develop over parts of the Huron
Mountains of Michigan s Upper Peninsula early Tuesday morning into Tuesday
evening. On Tuesday afternoon, wet snow will develop over parts of the
highest elevations of the Central Appalachians. Further, lake effect rain
will develop downwind of the Great Lakes from Monday afternoon through
Tuesday evening over parts of the Ohio Valley and Central Appalachians.
Moreover, as the front moves over the Central Appalachians on Sunday
afternoon, the boundary will produce showers and moderate to severe
thunderstorms over parts of the Central Appalachians. Therefore, the SPC
has issued a Marginal Risk (level 1/5) of severe thunderstorms over parts
of the Central Appalachians through Monday morning. The hazards associated
with these thunderstorms are frequent lightning, severe thunderstorm wind
gusts, hail, and a minimal threat of tornadoes.
Meanwhile, easterly flow off the Atlantic will aid in producing showers
and thunderstorms with moderate to heavy rain over parts of southeastern
Florida. Therefore, the WPC has issued a Marginal Risk (level 1/4) of
excessive rainfall over parts of southeastern Florida through Monday
morning. The associated heavy rain will create localized areas of flash
flooding, affecting areas that experience rapid runoff with heavy rain.
Furthermore, a front moving onshore over the Pacific Northwest late Monday
morning will move inland to the Northern Intermountain Region and Northern
California by Tuesday evening. The system will produce light rain over
parts of the Pacific Northwest through late Tuesday afternoon. In
addition, upper-level dynamics associated with an upper-level low over the
Great. From Sunday evening through Tuesday evening, scattered showers and
thunderstorms will cover parts of the Great Basin and Central Rockies.
Ziegenfelder
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
