A data assimilation was done in the Midwest and western Great Lakes on January 15. Snow water was added due to under-production of snowfall from recent storms. Up to an inch of water was added, mainly in eastern and central Iowa. About 1/2 inch of water was added in central Wisconsin, southeastern Minnesota and northwestern Illinois.
A data assimilation was done for the western and southern parts of the West on January 15. Adjustments were needed due to over-modeled snowmelt due to warm air temperatures during the past week. In the Cascades, additions ranged from about 1/2 inch in the north to about 4 inches at high elevations in the south. In the northern California mountains and in the northern Sierra Nevada, around 2 inches of water were added, with decreasing amounts to the south. One to 2 inches of water was added through the higher elevations of Oregon.
NOHRSC Airborne Snow Survey Program
The Airborne program has no scheduled flights in this region for the week of January 12, 2009.
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