FXUS64 KBMX 220535
AFDBMX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1135 PM CST MON DEC 21 2009

.UPDATE...AVIATION DISCUSSION.

&&

.DISCUSSION...SOME MID AND HIGH CLOUDS WILL SHIFT FROM WEST TO EAST
ACROSS THE AREA OVERNIGHT.  CURRENT DEWPOINTS RUNNING HIGHER THAN
EXPECTED.  WENT AHEAD AND ADJUSTED DEWPOINTS...RAISED OVERNIGHT LOWS
SLIGHTLY AND ADDED PATCHY FOG TO ALL LOCATIONS.

&&

.AVIATION...06Z TAF DISCUSSION.

STILL LOOKING AT THE POTENTIAL FOR FOG THE REST OF THE NIGHT. 
EARLIER TONIGHT...IT LOOKED LIKE THE SAME STATIONS THAT SAW FOG LAST 
NIGHT WERE GOING TO SEE THE SAME CONDITIONS AGAIN TONIGHT. 
HOWEVER...HIGH CLOUDS COMING IN FROM THE WEST COULD HELP PREVENT FOG 
FROM FORMING AT ALL. BASED ON OBSERVATIONS SITES ACROSS 
MISSISSIPPI...TEMPERATURES SHOT UP 5 DEGREES OR MORE WHEN THESE 
CLOUDS MOVE THROUGH. THIS WILL HELP KEEP THE SPREAD BETWEEN 
TEMPERATURE AND DEWPOINT FAR AWAY ENOUGH TO HELP PREVENT FOG FROM 
DEVELOPING. FOR NOW...KEPT MVFR CONDITIONS ACROSS THE SAME LOCATIONS 
THAT SAW FOG LAST NIGHT. HOWEVER...WHETHER OR NOT THEY WILL DROP 
BELOW THAT IS STILL IN QUESTION. LEFT AT LEAST BCFG IN THE FORECAST 
TO REFLECT THE POSSIBILITY OF SHALLOW DENSE FOG.

CONDITIONS ARE EXPECTED TO IMPROVE QUICKLY SHORTLY AFTER 13Z.

10/ARM

&&

.BMX WATCHES/WARNINGS/ADVISORIES...NONE.

&&

$$

KSL