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