Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
257 AM EST Fri Feb 03 2023

Valid 12Z Fri Feb 03 2023 - 12Z Sun Feb 05 2023

...Temperatures will be 15 to 35 degrees below average over parts
of the Upper Mississippi Valley, Great Lakes, Ohio Valley, and the
Northeast...

...Lake-effect snow downwind from the Great Lakes...

...Snow over parts of the Cascades, Sierra Nevada Mountains, and
the Northern Rockies...

Cold high pressure over the Upper Mississippi Valley will move
eastward to the Mid-Atlantic by Saturday and off the East Coast by
Sunday. The associated cold air will produce temperatures 15 to 35
degrees below average over parts of the Upper Mississippi Valley,
Great Lakes, Ohio Valley, and the Northeast through Sunday.
Therefore, wind Chill Warnings and Wind Chill Advisories are
posted from the Dakotas eastward to New England. Temperatures will
begin to moderate over the Northern Plains/Upper Mississippi
Valley by Sunday.

On the leading edge of the cold air will be a cold front extending
from the Mid-Atlantic to the Lower Mississippi Valley and the
Southern Plains will move eastward off most of the Eastern
Seaboard by Friday evening.

Meanwhile, upper-level energy over the Great Lakes and the
Northeast will aid in producing lake-effect snow downwind from the
Great Lakes through late Saturday night. Furthermore, a wave of
low pressure over a second front over Florida will slowly move
southward over the peninsula to southeastern Florida by Saturday.
The low will produce showers and thunderstorms over parts of the
Southeast through late Friday night.

Moreover, a warm front over parts of the Northern/Central Plains
will move into the Great Lakes by Saturday morning. The energy
associated with the front will produce light snow over the Upper
Great Lakes early Saturday morning through Sunday. In addition,
light snow will develop over parts of the Upper Mississippi Valley
on Sunday morning.

In the meantime, upper-level energy will move onshore over the
Pacific Northwest and eastward to the Great Lakes/Ohio valley by
Sunday. The energy will produce coastal rain starting by Friday
afternoon over parts of the Northwest and Northern/Central
California. Light snow will also develop over parts of the higher
elevations of Northern California. Overnight Friday, light snow
will develop over parts of the Northern Intermountain Region and
Northern Rockies. By Saturday morning, the rain and
higher-elevation snow will end over California. However, light
rain and higher-elevation snow will develop over parts of
California and the Pacific Northwest by Saturday night, expanding
into the Great Basin by Sunday Morning. The snow will become heavy
over the Sierra Nevada Mountains. The snow will result in reduced
visibility and hazardous driving conditions.

Ziegenfelder

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