NAM AIR QUALITY DIAGNOSTIC DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
1003 AM EDT TUE AUG 07 2012


*** 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 SURFACE TEMPERATURES AS MUCH AS 5 TO 10
DEGREES TOO COLD FROM THE MOUNTAINS TO DESERT.


FRONT RANGE OF COLORADO...
SNAKE RIVER VALLEY OF IDAHO...
NEAR SALT LAKE CITY...

THERE WERE NO SIGNIFICANT INITIALIZATION ERRORS NOTED WITH THE NAM
IN THESE REGIONS.


CENTRAL OKLAHOMA...
EAST/SOUTHEAST TEXAS...

THERE WERE NO SIGNIFICANT INITIALIZATION ERRORS NOTED WITH THE NAM
IN THESE REGIONS.


OHIO/TENNESSEE VALLEY...
MID MISSISSIPPI VALLEY...

THERE WERE NO SIGNIFICANT INITIALIZATION ERRORS NOTED WITH THE NAM
IN THESE REGIONS.


NORTHERN MID-ATL STATES...

THERE WERE NO SIGNIFICANT INITIALIZATION ERRORS NOTED WITH THE NAM
IN THIS REGION.


MUSHER