NAM AIR QUALITY DIAGNOSTIC DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
1004 AM EDT MON AUG 06 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...
LOWER COLORADO VALLEY...

THE NAM INITIALIZED SURFACE TEMPERATURES AS MUCH AS 10 DEGREES TOO
LOW NEAR THE MOUNTAINS...A CONSEQUENCE OF ITS TERRAIN RESOLUTION.


FRONT RANGE OF COLORADO...

THE NAM INITIALIZED SURFACE TEMPERATURES AS MUCH AS 15 DEGREES TOO
LOW NEAR THE MOUNTAINS...A CONSEQUENCE OF ITS TERRAIN RESOLUTION.


CENTRAL OKLAHOMA...
EAST TEXAS...

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


SAINT LOUIS AND VICINITY...

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


OHIO VALLEY...

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


NEW JERSEY...

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


CISCO