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Automated Model Discussion:
March 11, 2013
  Area Covered By Snow:34.5%
  Area Covered Last Month:44.8%
Snow Depth
  Average:5.6 in
  Minimum:0.0 in
  Maximum:1305.8 in
  Std. Dev.:13.6 in
Snow Water Equivalent
  Average:1.4 in
  Minimum:0.0 in
  Maximum:676.8 in
  Std. Dev.:3.9 in
more... Metric Units...
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Snow Water Equivalent
Thumbnail image of Modeled Snow Water Equivalent
Animate: Season --- Two weeks --- One Day
Snow Depth
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Average Snowpack Temp
Thumbnail image of Modeled Average Snowpack Temp
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SWE Change
Thumbnail image of Modeled SWE Change
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Snow Precipitation
Thumbnail image of Modeled Snow Precipitation
Animate: Season --- Two weeks --- One Day
Snow Melt
Thumbnail image of Modeled Snow Melt
Animate: Season --- Two weeks --- One Day
Blowing Snow Sublimation
Thumbnail image of Modeled Blowing Snow Sublimation
Animate: Season --- Two weeks --- One Day
Surface Sublimation
Thumbnail image of Modeled Surface Sublimation
Animate: Season --- Two weeks --- One Day
Non-Snow Precipitation
Thumbnail image of Modeled Non-Snow Precipitation
Animate: Season --- Two weeks --- One Day

Snow Reports

Top Ten:Metric Units...
Station IDNameElevation
(feet)
Snowfall
(in)
Duration
(hours)
Report Date / Time(UTC)
MSCI4MASON CITY #111326.0006.0002013-03-11 04:00
RSRM5ROCHESTER AP 2NE12665.3006.0002013-03-11 05:00
2873O_MADISRYE 1.1 WSW, CO713918.10024.0002013-03-10 13:00
LSXI4LITTLE SIOUX,IA10204.0006.0002013-03-10 12:00
ARXLA CROSSE, WI12733.4006.0002013-03-11 05:00
PAKNKING SALMON AIRPORT723.3006.0002013-03-10 18:00
0805C_MADISASPEN PARK 5.2 ESE, CO744413.00024.0002013-03-10 14:00
1356C_MADISAGUILAR 7.2 WSW, CO716212.50024.0002013-03-10 13:00
HSTN1HASTINGS 4N19423.1006.0002013-03-10 11:54
MQTMARQUETTE, MI14113.1006.0002013-03-11 06:00

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

Model Assimilation

An assimilation was performed 3/6/2013 for the Mid-Atlantic and Northeastern United States using recent observations from the NYCDEP, NEACE, and additional SWE reporting observers to adjust SWE within the snowpack. Across Ohio, Central New York, and Southern Maine water was removed from the snow pack due to the model overestimating snow precipitation. In these areas between 0.4 to 2 inches of water was removed from the snowpack. In parts of Pennsylvania, Virginia, Northern New York, Vermont, and New Hampshire water was added to the snowpack after the model underestimated snow precipitation associated with the recent winter storm (3/5-3/6). In these areas between 0.5 to 3 inches of water was added to the snowpack. This area will be reviewed again today (3/7) as new observations become available to adjust the snowpack accordingly due to the recent winter storm event.

An assimilation was performed 3/4/2013 for both East and West CONUS to adjust water levels within the snowpack. In the Eastern United States throughout much of the region water was removed from the snow pack, while in the Western United States water was added to the snowpack.

In the Northeast and Central Midwest the model overestimated precipitation and required water to be removed from the snowpack. In the Northeast up to 1 inch of water was removed, in Michigan up to 0.5 inches of water was removed, and across Iowa, Missouri, and Kansas up to 1 inch of water was also removed. Along the coast in the Northeast the model overestimated melt and required up to 1.75 inches of water to be added to the snowpack in parts of Massachusetts, Connecticut, and New Hampshire.

The largest amounts of water were added to snowpacks in the Sierra Nevadas, up to 3 in; Cascades, up to 4 in; Eastern Oregon, up to 1.25 inches ; and Southwest Idaho, up to 2 inches. In these areas the model had overestimated snowmelt. Two notable locations where water was removed from the snowpack in the West include the Yellowstone Region and the western side of the Colorado Front Range. In these areas up to 1 inch of water was removed due to the model overestimating snow precipitation.

The large winterstorm moving across the Midwest into the Mid Atlantic region will continue to alter the snowpack as it progresses eastward. Incoming observations will continue to be monitored and the model will be assimilated as necessary to adjust snow water levels as the storm moves across the region.

NOHRSC Airborne Snow Survey Program

The Airborne program has no scheduled flights in this region for the week of March 11, 2013.



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