…Precipitation returns to the West Coast, signaling the beginning of a
wet pattern…
…Much needed rains spread into the Upper Tennessee Valley, Southern
Appalachians, Mid-Atlantic and southern New England…
…Above average temperatures will stretch across much of the Lower 48
heading into the weekend…
After several weeks of no precipitation along large portions of the West
coast, a more active West coast weather pattern is set to begin Thursday
evening/night as precipitation spreads inland off the Pacific into the
Pacific Northwest and northern California. Rains and higher elevation
snows will continue into Friday and Saturday from northern California into
the Pacific Northwest from the Cascades westward to the coast. The recent
dry West coast weather has left the region well below average this month
with precipitation. This will reduce the threat of any flooding from the
expected heavy rains over the next few days. However, this is the
beginning of an overall wetter weather pattern for the West coast that
will bring additional rounds of potentially heavy precipitation into
Northern California for next week, and result in increasing flood threats
with time.
Active weather currently across portions of the Southern Plains to Lower
Mississippi Valley region will be spreading northeastward Thursday night
into Friday through the Ohio and Tennessee Valleys, across the Southern to
Central Appalachians, into the Mid Atlantic and southern New England as a
storm system pushes northeastward across these areas over the next two
days. Much of the eastern U.S. has seen below average precipitation
recently, resulting in areas from the Upper Tennessee Valley/Southern
Appalachians into the Mid-Atlantic and southern New England experiencing
moderate to severe drought conditions. The expected rainfall totals of
.50 to 1+ inches, while only putting a dent in the drought, will be much
welcomed. The heaviest rainfall totals expected across the Central
Appalachians from eastern Kentucky into West Virginia and far southwest
Pennsylvania. Melting snows and saturated soils may lead to isolated
flooding issues across these regions, with flood watches currently in
effect. Isolated flooding issues also possible over portions of the Lower
Missouri and Mid-Mississippi Valley regions from northeast Kansas, across
northern Missouri, southeast Iowa and northern Illinois from rain falling
on still frozen ground. This will reduce the amount of rain absorbed into
the ground, enhancing runoff into streams and leading to isolated
flooding.
Above average temperatures expected across much of the Lower 48 for the
end of the workweek and the weekend. The exception will be across the
Great Lakes and New England on Saturday when temperatures are expected to
be below average in the wake of a strong cold front. Elsewhere across the
Lower 48, high temperatures will be above average over the next few days.
High temperatures expected to be 10 to 15 degrees above average Friday
across nearly all of the central to eastern U.S. By Saturday, high
temperatures will reach 15 to 20 degrees above average across all of the
Plains and 5 to 10+ degrees above average to the southeast of this into
the Southeast U.S., and westward into the Great Basin.
Oravec
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
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