NAM AIR QUALITY DIAGNOSTIC DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
1020 AM EDT THU JUN 23 2011
 
*** The following information pertains to initialization errors
noted on the 12Z NAM that may negatively impact the performance of
the 12Z CMAQ output as used for air quality forecasting.
Specifically, errors that apply to temperature, winds, relative
humidity and precipitation are included. This discussion only
applies to geographical regions of the CONUS where air quality is
currently forecast to be degraded (i.e. CODES:
YELLOW/ORANGE/RED/PURPLE/MAROON). ***


...INTERIOR VALLEYS OF CALIFORNIA...
...DESERT SOUTHWEST...

THE NAM INITIALIZED AS MUCH AS 25 DEGREES TOO HIGH WITH SURFACE
TEMPERATURES OVER PARTS OF SOUTHERN CALIFORNIA...MAINLY NEAR THE
RISE IN TERRAIN.  THIS ERROR IS MOST LIKELY A RESOLUTION ISSUE. 
OTHERWISE...NO SIGNIFICANT ERRORS WERE NOTED.


CISCO