March 4, 2008
New MOS forecast equations based on output from NCEP’s North
American Mesoscale Model (NAM) have been developed for selected weather
elements. Thus far, the new guidance is available for maximum, minimum, and 2-m
temperature, dew point, probability of precipitation (
The tables below give the results of cool- and warm-season comparative verifications performed for the above three systems. Verification scores are presented at our standard set of 335 verification sites for the weather elements listed. However, because of the scarcity of available developmental data, these withheld-data tests generally were limited to a period of 30-35 days for each season. Verification results on more extensive samples of independent data will be available as we progress through the spring and summer months of 2008.