…Record heat continues across the Ohio Valley into the Southern
Appalachians through Friday, with relief on tap for the weekend…
…Much above average temperatures build across the Pacific Northwest,
Northern Great Basin and into the Northern Rockies…
…Active thunderstorms expected along and ahead of a strong front pushing
from the Upper to Mid Mississippi Valley into the Ohio Valley and across
the Central to Southern Plains, producing heavy rains, flooding and severe
weather…
…Heavy rains and isolated flooding possible along the Louisiana and
upper Texas coasts…
The recent period of much above average /record high temperatures from the
Ohio Valley into the Southern Appalachians will be continuing through
Friday. High temperatures are expected to be 10 to 15 degrees above
average through Friday, supporting the potential for additional record
high temperatures Thursday and Friday from southern Ohio into southern
Indiana, much of Kentucky, eastern to central Tennessee and far western
North Carolina. The combination of the hot temperatures and high humidity
levels will produce major heat risks with maximum heat indices in the 100
to 110 degree range. The current record high temperature streak, will
however, be coming to an end on Saturday when cooler temperatures are
expected as cloud cover and precipitation move in ahead of a strong cold
front.
Much above average temperatures will also be building across the Pacific
Northwest, Northern Great Basin into the Northern Rockies Friday and
Saturday as a mid to upper level ridge strengthens across this region.
These hot temps will likely continue into Sunday before cooling begins
early next week. At the moment, however, it does not appear that these
much above average temperatures will produce any record highs.
The strong front bringing relief to record high temps over the Ohio Valley
into the Southern Appalachians will first be pushing southeastward over
the next two days from the Upper Mississippi Valley into the Great Lakes
and southward into portions of the Central to Southern Plains. Active
thunderstorms with heavy rains, localized flooding and severe weather are
possible late Thursday afternoon into Thursday night/early Friday morning
across the Upper to Mid Mississippi Valley into portions of the Central to
Southern Plains along and ahead of this strong front. These active
thunderstorms are then expected to flare again Friday into early Saturday
across the Lower Great Lakes into the Ohio Valley with additional
potential for heavy rains, localized flash flooding and severe weather.
Heavy rains and localized flooding also possible across portions of the
Central Appalachians into the Mid Atlantic Thursday afternoon into
Thursday night along a stationary front across this region and then again
late Saturday afternoon into Saturday night ahead of the above mentioned
strong front moving southeastward from the Lower Lakes/Ohio Valley region.
An area of much above average moisture values is expected to remain nearly
stationary over the next few days across the western to central Gulf of
Mexico. A weak mid to upper level disturbance embedded in this high
moisture axis will likely produce heavy rainfall amounts along the
Louisiana coast, westward to the Upper Texas coast. Rainfall totals of
3-5″ possible over the next few days, with additional heavy rains into the
end of the weekend and early next week also possible as the weak mid to
upper level disturbance and axis of much above average moisture are not
expected to move appreciably.
Oravec
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
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