Area Forecast Discussion
Issued by NWS Huntsville, AL

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FXUS64 KHUN 301512 AAA
AFDHUN

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1012 AM CDT THU JUL 30 2015

.UPDATE...TO LOWER DEWPOINTS AND REDUCE POP LATE.

&&

A COLD FRONT CURRENTLY EXTENDS FROM NORTHEASTERN TENNESSEE SOUTHWEST
INTO NW ALABAMA TOWARD TUPELO MISSISSIPPI. MUCH DRIER AIR CAN BE SEEN
IN SURFACE OBSERVATIONS BEHIND THE FRONT WITH DEWPOINTS IN THE LOWER
TO MID 60S. AHEAD OF THIS FRONT A PRE-FRONTAL TROUGH AXIS EXTENDS
FROM CENTRAL GEORGIA TOWARDS CULLMAN AND SOUTHERN MARSHALL COUNTIES
IN AL.

MODELS PUSH BOTH OF THESE FEATURES SOUTH DURING THE DAY TODAY. IN
FACT...THE SUBSIDENCE BEHIND THE PRE-FRONTAL TROUGH MAY HELP TO
INHIBIT ANY CONVECTION THAT WOULD TRY TO FORM AHEAD OF THE FRONT THIS
MORNING NORTH OF THE TENNESSEE RIVER. IN ADDITION...THE ATMOSPHERIC
COLUMN ALOFT WILL BECOME MUCH DRIER AS EARLY AS THE LATE MORNING
HOURS VIA ADVECTION ALOFT. SURFACE DEWPOINTS WILL REMAIN HIGH THIS
MORNING IN THE LOWER 70S...BEFORE DEWPOINTS QUICKLY DROP BEHIND THE
FRONT INTO THE LOWER 60S DURING THE LATE MORNING/EARLY AFTERNOON
HOURS. HOWEVER...WITH A VERY WEAK FRONT STILL MOVING THROUGH...CANNOT
RULE OUT AN ISOLATED SHOWER OR THUNDERSTORM THROUGH 3 OR 4
PM...MAINLY IN CULLMAN...MORGAN...AND DEKALB COUNTIES. THIS SHOULD
MAKE FOR A VERY PLEASANT DAY LATER THIS AFTERNOON WITH HIGHS IN THE
UPPER 80S TO AROUND 90 DEGREES.

KTW

&&

.AVIATION...
/ISSUED 657 AM CDT THU JUL 30 2015/
FOR 12Z TAFS...
A COLD FRONT IS ADVANCING S/SE THROUGH NORTHWESTERN TENNESSEE AS OF
1145Z THIS MORNING. A DECK OF LOW/MID LEVEL CLOUDS BETWEEN 1500-3000
FT HAS FORMED OUT AHEAD OF THIS FRONT AND IS CURRENTLY SPREADING
SOUTH INTO THE AREA. MVFR CIGS WILL BE POSSIBLE THROUGH 15-16Z AS THE
FRONT ENTERS THROUGH THE REGION. DRIER AIR BEHIND THE FRONT WILL
ALLOW FOR MAINLY HIGH CLOUDS FOR THE REMAINDER OF THE TAF PERIOD.
NORTHERLY WINDS WILL PICK UP BEHIND THE FRONT WITH GUSTS UPWARDS OF
20 KTS POSSIBLE.

ISOLATED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE TODAY FOR
PORTIONS OF NORTHEAST ALABAMA. NOT EXPECTING ANYTHING FORMING NEAR
EITHER TERMINAL AS THE DRIER AIR SHOULD ARRIVE BEFORE STORMS DEVELOP.

STUMPF

&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...NONE.
TN...NONE.
&&

$$

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE
AT WEATHER.GOV/HUNTSVILLE.


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