…Low pressure system will bring widespread mountain snow across the
western U.S. and a swath of moderate to locally heavy snowfall across the
north-central Plains through Friday…
…Critical fire weather conditions expected to continue across the
southern High Plains…
…Colder and drier air to arrive across the East but with some areas of
snowfall downwind of the Great Lakes and into the central and northern
Appalachians…
A broad low pressure system currently developing over the interior western
U.S. will bring widespread unsettled weather eastward into the mid-section
of the country through the next couple of days. In the short term,
widespread mountain snow will affect the Great Basin eastward into the
northern and central Rockies into Friday. The low pressure system will
begin to move across the central Plains. Colder air will support a swath
of moderate to locally heavy snowfall north of the track of the low
pressure center from the northern Rockies eastward across the
north-central Plains where up to locally a foot of new snow is possible on
Friday. Snow will extend as far east as portions of the Midwest including
Iowa and northern Illinois where at least a few inches of accumulation can
be expected. In addition, a piece of upper-level disturbance embedded
within the broad system will bring lower-elevation rain and mountain snow
across the southwestern U.S. through Friday, reaching into the Four
Corners by Friday night. The mountain snow will then advance further east
across the southern Rockies on Saturday. Heaviest snowfall of 1 to 2 feet
can be expected along the Mogollon Rim and the San Juan Mountains in the
Rockies, as well as across the higher terrain of the central Rockies and
along the Wasatch of Utah.
Farther south over the southern High Plains on the warmer and drier side
of this storm system, there will once again be concerns for wildfire
activity, as a combination of low relative humidities and gusty winds is
expected to once again result in critical fire weather conditions which
will primarily encompass much of eastern and southern New Mexico and out
into western Texas.
Across the eastern U.S., colder and drier air will continue to be ushered
into the area behind a slowly departing deep cyclone across the Canadian
Maritimes. The proximity of the deep low will allow the rain to change
over to light snow tonight across northern Maine, followed by a period of
light to moderate snow through Friday morning as a final low pressure wave
is forecast to pass just to the east. A reinforcing shot of colder air
will be accompanied with areas of snow showers to bring locally several
inches of lake-enhanced snowfall downwind of the Great Lakes and into the
upslope areas of the central and northern Appalachians on Friday.
Meanwhile, rain and a few embedded thunderstorms will begin to develop in
Texas Saturday morning and expand eastward into Louisiana by Saturday
afternoon as a wave of low pressure develops along a cold front.
Kong
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
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