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Area Forecast Discussion

499
FXUS64 KBMX 180456
AFDBMX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1156 PM CDT WED SEP 17 2014

.UPDATE...
FOR 06Z AVIATION.

&&

.DISCUSSION...

LOOKING AT THE LATEST OBSERVATIONS ACROSS CENTRAL ALABAMA THE
REMNANTS OF A WEAK FRONTAL BOUNDARY STILL EXISTS ACROSS THE AREA.
THERE IS A CLEAR DEWPOINT GRADIENT ACROSS THE AREA THAT STRETCHES
FROM HALEYVILLE TO BIRMINGHAM TO ALEX CITY. DEWPOINTS ON THE NORTH
SIDE OF THIS BOUNDARY ARE MUCH DRIER WITH DEWPOINTS IN THE MID TO
UPPER 50S. FOR INSTANCE...THE CURRENT DEWPOINT AT THE BIRMINGHAM
AIRPORT IS 58 WHILE JUST 20-30 MILES SOUTH AT THE SHELBY COUNTY
AIRPORT THE DEWPOINT IS 66. THE TEMPERATURE AT THE BIRMINGHAM
AIRPORT SHOULD BEGIN TO DROP RAPIDLY AS THE WINDS DECREASE OVER
THE NEXT COUPLE OF HOURS. IN THE UPPER LEVELS...CURRENT IR
SATELLITE INDICATES HIGH CLOUDS STREAMING IN FROM THE NORTHWEST IN
ASSOCIATION WITH A SHORTWAVE TROUGH. THESE CLOUDS WERE ASSOCIATED
WITH CONVECTION EARLIER THIS EVENING ACROSS ARKANSAS AND MISSOURI.
FOR THE UPDATE...INCREASED CLOUD COVER LATE IN THE NIGHT AS THESE
CLOUDS CONTINUE TO MOVE INTO THE AREA. FOR LOW
TEMPERATURES...ADJUSTED TEMPERATURES DOWN JUST A TOUCH IN THE
NORTHEAST WITH RADIATIONAL COOLING CONDITIONS CONTINUING FOR THE
NEXT FEW HOURS BEFORE THE CLOUDS ARRIVE.

05/MA


&&

.AVIATION...
06Z TAF DISCUSSION.

VFR CONDS WILL PREVAIL THRU THE PERIOD. LIGHT FOG POSSIBLE ACROSS
SOUTHEAST ALABAMA...AND INCLUDED SOME MVFR VSBYS AT KTOI FOR A FEW
HOURS NEAR SUNRISE. SOME OF THE MODELS ARE HINTING AT A FEW SHWRS
ACROSS NORTH ALABAMA BETWEEN 1200 UTC AND 1700 UTC...BUT CHANCES
TOO LOW TO INCLUDE IN FORECAST.

58/ROSE

&&

.PRELIMINARY POINT TEMPS/POPS...
GADSDEN     58  84  61  85  63 /   0   0  10  10  10
ANNISTON    59  86  62  85  64 /   0   0  10  10  10
BIRMINGHAM  64  86  64  87  67 /   0   0  10   0  10
TUSCALOOSA  64  89  64  90  67 /   0   0   0  10  10
CALERA      65  86  64  87  66 /   0   0  10  10  10
AUBURN      64  87  66  86  65 /   0   0  10  10  10
MONTGOMERY  66  89  67  89  67 /   0   0  10  10  10
TROY        64  89  65  89  65 /   0   0  10  10  10

&&

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

&&

$$







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