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New! The NOHRSC is implementing the following two experimental model
enhancements in the 2011-2012 snow season:
- Expanding the modeled geospatial domain further into Canada to include
the Great Lakes drainage area, and
- Executing the model in a 72 hour forecast mode where the first 18
forecast hours are forced by output from the Rapid Refresh (RR) model
and the remaining 54 hours are forced by output from the North
American Mesoscale (NAM) model.
The experimental review period for
this product
runs from October 27, 2011 through July 1, 2012. We encourage your
comments or suggestions on these enhancements using the
feedback form or via the
online
survey.
SNODAS Model Adjustments:
A data assimilation was performed on April 13 across the Upper Midwest and upper Great Lakes. Generally snow water amounts were decreased by 1/2 to 1 inch due to over-simulation of snowfall during the most recent winter storm.
An adjustment to the snow water was done on April 13 in Colorado, southern Wyoming, and northern New Mexico. The model had accumulated 1/2 to 1 inch more snow water than what was observed, mainly at higher elevations. At lower elevations, up to 1/2 inch of snow water was removed from the snowpack.
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Directions:
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Select a physical element to view, select a date, select overlays, and click "Redraw Map."
- Clicking on the map while the Recenter button is selected (red) will recenter the map on that point.
- Clicking on the Zoom Control slider will zoom into or out of the map.
- Clicking on the map and dragging with the button held down while the Recenter button is selected (red) will zoom to a rectangle when the button is released.
- Stations and regions can be queried using the Query button and menu.
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