…Flash Flooding and Severe Weather concerns continue for portions of the
Southern Plains, Gulf Coast, Lower Mississippi Valley and Southeast…
…Freezing rain impacts possible over parts of southern Maine/central New
England…
…Unseasonably warm air surges into the eastern third of the country
leading to widespread record low temperatures Thursday night…
A shortwave trough crossing the central U.S. will support repeated rounds
of convection across the southern tier. Some of these storms will have the
potential to become severe today across the Gulf states and Southeast.
Scattered to widespread heavy rain will be the main hazard given the
influx of anomalous moisture and significant instability into the region.
A Slight Risk (level 2/4) of Excessive Rainfall leading to Flash Flooding
is in effect for portions of Louisiana to western portions of North
Carolina, where the confluence of moisture, instability and lift along the
surface front will be greatest. The primary Flash Flood risk pivots into
parts of the Southeast and Southern Appalachians while remaining over the
central Gulf Coast. The Severe threat remains for the Lower Mississippi
Valley and Southeast.
The anomalous moisture mentioned above with continue to spread into the
Northeast ahead of the approaching low pressure system over the Ohio
Valley. Rain showers in the warm sector are likely for much of the
Northeast and Lower Great Lakes tonight while freezing rain gets going
over parts of Vermont, New Hampshire and southern Maine. Freezing rain
accumulations aren’t expected to eclipse 0.1″. Light snow will occur over
central and northern Maine. Conditions should improve by Thursday
afternoon for the Northeast.
Unseasonably warm temperatures will overspread the East Coast and portions
of the Ohio and Tennessee Valleys. Low temperature anomalies between 40-50
degrees above average will lead to widespread records being broken tonight
and Thursday night. Elsewhere, low pressure in the West will produce snow
showers over the Cascades, Sierra and Rockies over the next couple of
days. New accumulations of 4 to 6 + inches are possible today and into
Friday – a few isolated areas may exceed 8 inches.
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