Didn't see this elsewhere so I thought I'd share from NCEP:
Attention MOS Users:
Given the postponements of several MOS changes last week due to tropical system Alberto, we wanted to remind you of some changes going in today.
The WRF model is being put into the NAM system today. There will not be WRF MOS, but the Eta MOS will continue to be run for the time being off a 32-km version of the Eta.
A new max/min temperature product for the Alaska RFC will be produced starting with the 1200 UTC cycle today.
We are implementing updated temperature, dewpoint, and max/min equations, as well as wind speed and direction equations. Traditionally in the MOS system we inflate the wind speed forecasts. Essentially this means that if the forecast wind speed is below the mean, we lower the wind speed, and if it is above the mean we increase the wind speed.
More details of this technique are available in http://www.weather.gov/mdl/synop/tpb/474.pdf. During the recent wind redevelopment, testing showed better results if wind speeds forecasts below the mean were not lowered, so we will no longer do this. The result will be fewer MOS wind forecasts of calm winds.
WRF "the Real Deal" today
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Scott_inVA
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WRF "the Real Deal" today
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