Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
300 PM EST Thu Dec 05 2024

Valid 00Z Fri Dec 06 2024 - 00Z Sun Dec 08 2024

...Heavy lake-enhanced/lake-effect snow downwind from Lakes Erie and
Ontario post frontal passage ...

... A reinforcing Arctic air mass is overtaking the eastern U.S. and windy
conditions bring hazardous wind chills ...

...Generally dry and above average temperatures across the Western and
Central U.S. ... 

Breezy and blustery conditions are ongoing across much of the eastern U.S.
behind the cold front passage this afternoon. Temperatures behind the
front are rather chilly with highs in the low 20s to middle 30s. In tandem
with the wind and cold, hazardous winter weather is possible across much
of Great Lake region, New England, and the Appalachians. Across Michigan,
there are multiple counties under Winter Storm Warnings and Winter Weather
Advisories, upstate New York has counties under Winter Weather Warnings
through Friday with heavy lake effect snow and strong winds, and western
New York and northwestern Pennsylvania have numerous warnings, including
Winter Storm Warnings, Lake Effect Snow Warning, and even a Blizzard
Warning for Erie into Friday as well. The expected lake effect snowfall
amounts are around 1-2 feet in susceptible lake effect areas where banding
trains; additionally, strong winds behind the front will continue to
create low visilibilites with blowing snow to create dangerous travel
conditions. The Appalachians and interior New England have a 60-80 percent
chance of seeing a foot of snowfall fall before the event winds down in
the next day or two.

The cold weather conditions should get attention as a hazard behind this
Arctic front. Wind chills may fall into the negative teens across the
mountains of the Applachains from West Virginia to New Hampshire with
valleys seeing wind chills in the single digits and teens across much of
the east. Cold Weather Advisories are active across the Alleghnies
mountain range in the Appalachains. Into Saturday, actual low temperatures
will be in the 20s and teens. Dress warm, look out for vulnerable
populations, and seek warm weather shelters if needed.

Much of the western U.S. is seasonably warm and dry as high pressure
dominates the region. High temperatures will be in the 80s across the
Southwest and 70s and 60s will prevail from southern California to the
Pacific Northwest. Temperatures are in general about 5-10 degrees above
average. The bigger warm-up will be over the central U.S. as high pressure
shifts eastward and displaces the Arctic air over the region. Temperatures
will be in the 50s and 60s from Oklahoma to Montana by Saturday, which is
about 20 degrees above average for this time of the year.

For the remainder of the U.S., much of Texas and the central Gulf Coast
can expect rain showers into the weekend from a weak area of low pressure
forming and lifting northwards along a front draped in the Gulf of Mexico.
Rain showers and some high elevation snow will return to Washington State
and Oregon by Saturaday as the next front moves through. Lastly, some
areas in the Great Lakes may see addiitonal snowfall and/or cold rain
showers as another clipper system moves in this weekend and helps
reinforce this troughing/cold pattern for at least a few more days.









Wilder


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