A brief, but major shift in the weather pattern will send
warm air northward and will produce a zone of heavy rain in parts of the
Central and Eastern states this weekend.
Temperatures will trend upward through the end of the week
from the Deep South to New England.
By the weekend, temperatures may challenge record highs from
the Gulf Coast to the Ohio Valley and the mid-Atlantic.
Highs will be in the 70s over much of the South with a few
spots flirting with 80 degrees Saturday and Sunday
Temperatures will reach into the 60s along the Ohio River
and the Mason-Dixon line bordering Pennsylvania and Maryland.
The combination of warm, moist air flowing over cold ground
and snowcover will lead to locally dense fog in some locations. Fog could
hinder early holiday travel this weekend.
Flooding Risk
Enough rain can fall by itself to cause flash, urban and
small stream flooding in areas from the northwestern Gulf Coast to the lower
Great Lakes and New England.
Where there is still a significant amount of snow remaining
on the ground in northern areas, rain combined with warm, moist air can cause
that snow to melt rapidly and a substantial rise may result on some rivers.
The situation is being monitored by experts in the National
Weather Service and in the commercial weather forecast sector.
The NWS Ohio River Forecast Center is projecting moderate to
major flooding along many rivers from southeastern Illinois to northeastern
Ohio, including portions of Kentucky.
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