…A significant winter storm will continue impacting the Southern Rockies
and High Plains today before turning northeast and aiming for the Northern
Mid-Atlantic, New York, and New England early this week…
…Areas of severe thunderstorms and heavy rainfall will impact the Gulf
Coast states and Southeast for the remainder of the weekend and through
Monday…
…Above normal temperatures to generally persist into early next week for
much of the northern and eastern U.S., with below normal temperatures
across the South…
A significant winter storm associated with a strong upper-level trough and
associated closed low will cross the southern Plains today which will
continue to focus areas of heavy snowfall across portions of the southern
Rockies and especially the adjacent areas of the southern High Plains.
Additional snowfall accumulations of 6 to 12 inches will be possible for
areas of the Texas Panhandle. As low pressure consolidates and deepens off
to the northeast toward the Arklatex region by tonight, some snowfall will
also begin to overspread areas of Oklahoma as marginally cold air combined
with moisture wrapping northward of the low center focus areas of moderate
to locally heavy snowfall.
Farther south and east across the Gulf Coast states, Mid-South, and
Southeast, low pressure will be approaching today through tonight, and
this coupled with moisture and instability pooling along a strong frontal
zone draped over the region will favor numerous areas of heavy showers and
thunderstorms. Some severe weather is expected, and this will include a
concern for strong damaging winds, large hail, and tornadoes. The Storm
Prediction Center has depicted a Slight Risk of severe weather (level 2 of
5) from eastern Texas to Alabama for today and tonight, and then for the
Southeast on Monday.
In addition to the severe weather threat, heavy rainfall is expected, and
there may be enough rain across portions of the Mid-South and Southeast to
produce at least an isolated threat for flash flooding where any areas of
showers and thunderstorms train over the same area. Locally a few inches
of rain will be possible across these areas as the low center gradually
crosses through the Tennessee Valley and aims for the Mid-Atlantic states
by Monday night.
As the storm system arrives across the Mid-Atlantic region, the concern
will again turn to a threat for significant winter weather as moisture
surging northward ahead of the strengthening low center begins to
encounter sufficient levels of cold air for a swath of heavy accumulating
snowfall. The primary corridor of heavy snow is expected to set up across
northern Pennsylvania and southern New York before tracking into southern
New England on Tuesday as a very deep low center edges offshore of the
northern Mid-Atlantic coast. Locally as much as 6 to 12 inches of snow can
be expected north of this low track. Strong winds and coastal flooding
will also accompany this evolving nor’easter threat. Meanwhile, farther
south closer to the track of the low itself, areas of heavy rain can be
expected given the presence of warmer temperatures.
Despite the threat of heavy accumulating snowfall for areas of the
northern Mid-Atlantic and New England early this week, temperatures across
large areas of the northern and eastern U.S. will remain above normal
given the lack of cold air transport south from Canada. Temperatures
across large areas of the South though will actually be below normal given
the extensive cloud cover, and threat for heavy precipitation.
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