National Snow Analyses

Click On Map for Regional Analyses	Automated Model Discussion: January 8, 2009   Area Covered By Snow: 40.5%   Area Covered Last Month: 26.3% Snow Depth   Average: 5.1 in   Minimum: 0.0 in   Maximum: 814.0 in   Std. Dev.: 11.1 in Snow Water Equivalent   Average: 1.1 in   Minimum: 0.0 in   Maximum: 357.9 in   Std. Dev.: 2.5 in
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Snow Water Equivalent Animate: Season --- Two weeks --- One Day	Snow Depth Animate: Season --- Two weeks --- One Day	Average Snowpack Temp Animate: Season --- Two weeks --- One Day
SWE Change Animate: Season --- Two weeks --- One Day	Snow Precipitation Animate: Season --- Two weeks --- One Day	Snow Melt Animate: Season --- Two weeks --- One Day
Blowing Snow Sublimation Animate: Season --- Two weeks --- One Day	Surface Sublimation Animate: Season --- Two weeks --- One Day	Non-Snow Precipitation Animate: Season --- Two weeks --- One Day

Weather Summary

Another 2 to 5 inches of rainfall (with locally higher amounts) occurred in the Northwest yesterday, accompanied by strong winds and unseasonably-warm temperatures. Farther inland, in the Northern Rockies through western Wyoming, up to a foot of snow fell.

Up to 1 foot of snow fell in the Northeast (mainly in the lake-effect areas of western New York) with up to 3/4 inch of freezing rain in New York an Pennsylvania and up to 1 1/2 inches of rainfall along the Northeast coast.

The snowpack in the Northwest and much of the West is very warm and is melting rapidly due to rainfall, warm and moist air, and condensation on the snowpack. Warm and moderately-melting conditions also exist in the northern High Plains, the Ohio River basin, and the Middle Atlantic due to rainfall and a surge of warm, moist air into those regions.

Another foot of snowfall is expected in the high-elevation northern Rockies today as the system which brought the heavy rainfall to the Northwest coast shifts eastward. Up to 1/2 inch of rainfall is possible at lower elevations there.

The warm air advection ahead of the storm will cause up to 1/2 foot of snowfall across the far northern Plains today, the western and southern Great Lakes tomorrow, and the middle Atlantic states on Saturday. South of the heaviest snowband will be a mix of snow, freezing rain, and rain.

A push of cold air will pass across the Great Lakes behind this system and cause lake-effect snows this weekend of all the Great Lakes.

High pressure will cover the West, but onshore flow on the north side of the high will bring heavy rainfall to mainly southwestern British Columbia on Sunday, but northwestern Washington might experience moderately heavy rainfall on Sunday.

Snow Reports

Note: these data are unofficial and provisional.
Zip codes (where available) of observations will be included in text files after October 7, 2008.

Station Snowfall Reports
Station Snow Water Equivalent Reports
Station Snowdepth Reports

Interpolated Snowfall Products

Model Assimilation

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