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Automated Model Discussion:
December 18, 2008
  Area Covered By Snow:59.4%
  Area Covered Last Month:8.6%
Snow Depth
  Average:3.2 in
  Minimum:0.0 in
  Maximum:695.5 in
  Std. Dev.:5.2 in
Snow Water Equivalent
  Average:0.5 in
  Minimum:0.0 in
  Maximum:334.3 in
  Std. Dev.:0.9 in
more... Metric Units...
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Snow Water Equivalent
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Animate: Season --- Two weeks --- One Day
Snow Depth
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Average Snowpack Temp
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SWE Change
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Snow Precipitation
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Snow Melt
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Blowing Snow Sublimation
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Surface Sublimation
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Non-Snow Precipitation
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Weather Summary

One to 2 feet of snow fell at higher elevations in the Southwest yesterday with the passage of a strong upper low and associated strong surface low. One to 1 1/2 feet of snow fell in the Washington Cascades with the passage of a surface low. Up to 1/2 foot of snowfall occurred in the Northeast yesterday in association with a surface low.

The coterminous snowpack is mainly cold and stable except for the southern fringes.

The system in the Northwest will head eastward, but disturbances aloft will cause widespread 1/2- to 1-foot of snowfall across the Northwest, Intermountains, and Northern Rockies today. The upper low which brought the snowfall to the Southwest will eject into the Plains and develop a surface low in the western Plains. This low will move smartly through the Midwest and the lower Great Lakes today and tomorrow. Up to a foot of snowfall is possible in the southern Great Lakes today and tomorrow and in the Northeast on Saturday. To the south of this snow band will be a good chance of moderate freezing rain during the next two days, from near St. Joseph, Missouri, through Massachusetts.

A midlevel trough over the Northwest, the one which brought the snowfall there yesterday, will translate eastward and help to bring snowfall to higher elevations in the West. This feature will also cause the development of a potent surface low in the Upper Midwest this weekend.

Snow Reports

Top Ten:Metric Units...
Station IDNameElevation
(feet)
Snowfall
(in)
Duration
(hours)
Report Date / Time(UTC)
PLRC1PALOMAR MOUNTAIN OBSVTRY450827.000242008-12-18 00
8425O_MADISDEL NORTE 2.5 ENE, CO785122.000242008-12-17 13
WRIC1WRIGHTWOOD600120.600242008-12-18 00
MMSI2MOUNT MORRIS9024.50062008-12-17 07
GEGSPOKANE INTL AP234316.600242008-12-18 00
OTXSPOKANE, WA237913.700242008-12-18 00
YMSC1YUCCA MESA344813.600242008-12-17 16
SUTV12MI.SW SUTTON,VT14763.40062008-12-17 18
43.4967_073.7767WARRENSBURG (251WAR)7555.500102008-12-17 14
43.7100_074.9747OLD FORGE (885OLD)17495.500102008-12-17 12

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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