…Snow and strong winds spread from the Northern to Southern Rockies…
…Critical Fire Weather Risk returns to Southern High Plains/Southwest
today; Extremely Critical Risk on Thursday…
…Severe Weather returns to Central U.S. beginning Thursday…
…Well above average temperatures over the Central U.S….
Snow showers should come to an end over the Lower Great Lakes this evening
while the associated upper-level low spins off into the Canadian maritime.
Below average temperatures persist through this evening as surface high
pressure settles in. Meanwhile, an amplifying upper trough will pivot over
southern Canada and send a strong cold front surging southward through the
Rockies. Moderate to heavy mountain snow and strong winds are expected to
expand from the Montana ranges today into northwestern Wyoming on
Thursday, followed by Colorado by Friday. The heaviest snowfall totals are
likely over portions of southern Montana into Wyoming where 1-2 feet,
isolated higher amounts, are probable by Thursday morning. Widespread
moderate to isolated major impacts are expected from the combination of
snow and wind. Cooler air filters into the Rockies and Intermountain West
behind the cold front, leading to well below average temperatures for the
region late this week.
An upper ridge over the Central U.S. will continue to stream warm
southerly air into the Great Plains today and gradually shift eastward
over the next few days. Temperatures in the 80s and 90s will represent
20-30 degree warm anomalies over parts of the Central/Southern Plains for
this time of year. An amplifying upper pattern over the Four Corners will
support the migration of warm, windy and very dry conditions eastward into
the Southern High Plains late this week. Thus, the Storm Prediction Center
issued a series of Critical to Extremely Critical Fire Weather Outlooks
for the region beginning today and extending into the weekend.
The aforementioned amplifying upper trough will also phase with a southern
stream low and promote scattered to severe thunderstorm activity across
the Central U.S. beginning tonight. Isolated to severe storms capable of
producing large to very large hail, a couple tornadoes and localized
damaging winds may occur, according to the Storm Prediction Center’s
Slight Risk area centered over the Corn Belt States for Thursday. The cold
front associated with this activity will become the focus for additional
severe weather and excessive rainfall concerns extending from the Upper
Great Lakes to the Southern Plains through the weekend.
Kebede
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
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