Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
229 PM EST Mon Nov 17 2025

Valid 00Z Tue Nov 18 2025 - 00Z Thu Nov 20 2025

...Heavy snow over the Sierra Nevada Mountains on Monday...

...Lake effect snow downwind from Lakes Erie and Ontario on
Monday...

...Upslope snow over the Northeast on Monday...

Rain is expected to spread across the West Coast as a developing
upper-level low moves southward. There is potential for embedded
thunderstorms for portions of central California through Tuesday
morning and for heavy snow over the Sierra Nevada Mountains,
through tonight. Rain and higher-elevation light snow are expected
to generate over parts of the Pacific Northwest on Tuesday
morning, tapering off by Wednesday. Showers and thunderstorms,
along with high-elevation snow, will begin to develop over parts
of the Southwest late tonight and is expected to continue through
Wednesday morning.

An area of low pressure located over the Central Rockies will move
advance through the plains toward the southern Ohio Valley by
Tuesday night into Wednesday. It will generate higher-elevation
snow and lower-elevation rain over parts of the Great
Basin/Central Rockies through late tonight.  Scattered showers and
thunderstorms will develop over parts of the Northern/Central
Plains, expanding into the Middle/Lower Mississippi Valley by this
evening.  By Tuesday morning, light snow will develop along the
northern edge of the precipitation shield over parts of the Upper
Mississippi Valley/Great Lakes into parts of the Ohio Valley. Rain
and a few embedded thunderstorms will develop over parts of the
Ohio Valley on Tuesday, tapering off by Wednesday. In addition,
rain will move into the Central Appalachians and Mid-Atlantic on
Tuesday afternoon, continuing into Wednesday.

Ongoing lake-effect snow downwind of Lakes Erie and Ontario will
taper off tonight while snow over parts of northeastern New York
State and the Northeastern Mountains will wane by Tuesday
night.For Florida, onshore flow will aid in scattered showers
through Wednesday. 

Campbell


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