Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
300 AM EST Sat Nov 27 2021

Valid 12Z Sat Nov 27 2021 - 12Z Mon Nov 29 2021

...Clipper system to produce light to moderate snow across Great Lakes and
interior Northeast through Sunday...

...Atmospheric River to generate moderate-to-heavy rainfall in the Pacific
Northwest through Sunday...

...Elevated fire weather across Southern California and part of the
Southern Plains through Sunday...

Winter Weather Advisories and Winter Storm Warnings remain in effect
across parts of northern New England on the backside of a departing potent
winter storm responsible for producing several inches of snow and gusty
winds across much of the interior Northeast on Friday. Blowing snow caused
by windy conditions are likely to remain a hazard for the interior
Northeast today. An Alberta clipper system will drop into the Midwest
today, bringing with it the chance for wintry weather across the Great
Lakes. This system will blanket portions of the Great Lakes and interior
Northeast in 1-3 inches of snow with isolated higher amounts, particularly
downwind of lake Eerie where they may get between 4-8 inches by Sunday
morning.  A cutoff-low over northern Mexico will be the trigger for
showers and thunderstorms across the Texas and the Texas/Louisiana Gulf
coasts today. Thunderstorms are not expected to be severe. The cutoff-low
is then expected to phase with the northern stream allowing for the
extension of the surface cold front from the Midwest down through the
Mississippi Valley.

An atmospheric river event is forecast to produce several inches of rain
across the Pacific Northwest through Sunday. Most of the heavy
precipitation associated with this system is likely to occur today though,
with tomorrows rainfall being more confined to the Olympic and northern
Cascade mountain ranges. A ridging pattern across the West and Central
U.S. will generate anomalous warmth across portions of the Northern and
Central Plains on Sunday and Monday. High temperatures are likely to be in
the low 60s across northeastern Montana on Sunday which would constitute a
25-30 degree departure from normal for them for this time of year. The
warm air will expand into the Northern/Central Plains on Monday where
highs may reach between 15-20 degrees above average. Dry and breezy
conditions will contribute to an elevated fire weather risk across
southern California today and Sunday. Locally critical fire risk may also
develop, according to the Storm Prediction Center, due to an exacerbation
of the aforementioned surface conditions. Winds will pick up on the
backside of a surface front passing through the Southern Plains today.
Paired with already dry conditions, this region may experience an elevated
fire weather threat today.

Kebede

Graphics are available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php