Area Forecast Discussion
Issued by NWS Birmingham, AL

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FXUS64 KBMX 210543
AFDBMX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1143 PM CST FRI NOV 20 2009

.UPDATE...AVIATION DISCUSSION.

&&

.DISCUSSION...

TEMPERATURES ARE A BIT PROBLEMATIC TONIGHT.  LOW DEWPOINTS AND LIGHT
WINDS ALLOWED TEMPS TO DROP FAIRLY QUICKLY AFTER SUNSET.  BUT NOW
THE CLOUDS ARE REALLY STARTING TO STREAM IN AHEAD OF THE NEXT STORM
SYSTEM.  THUS...TEMPERATURES MAY BE BOTTOMING OUT (OR AT LEAST
LEVELING OFF) IN THE WEST NOW (WHERE THE CLOUDS HAVE THICKENED UP
THE MOST)...BUT THERE MAY BE SEVERAL MORE HOURS OF COOLING IN THE
EAST.  WILL MAKE SOME ADJUSTMENTS TO THE HOURLY TEMPERATURE GRIDS
WITH THE EVENING UPDATE...BUT I PLAN ON LEAVING THE LOW TEMP
FORECAST ALONE (UNLESS SOMETHING SOON GETS OUT OF HAND ON THE LOW
SIDE).

RAIN AT THE MOMENT IS ONLY AS NEAR AS NEW ORLEANS.  THERE`S A SMALL
CHANCE THAT THE SOUTHWESTERN COUNTIES COULD GET SOMETHING MORE THAN
A FEW SPRINKLES (MEANING...MEASURABLE RAIN) BY 12Z TOMORROW
MORNING. I DON`T THINK THAT CHANCE IS QUITE ENOUGH TO INCLUDE IN THE
FORECAST RIGHT NOW THOUGH.

/61/

&&

.AVIATION...06Z TAF DISCUSSION.

HIGH CLOUDS WILL CONTINUE TO MOVE ACROSS THE AREA TONIGHT...WITH
LIGHT TO CALM WINDS. WITH CONSIDERABLE CLOUDINESS...DO NOT EXPECT
WIDESPREAD BR/VIS PROBLEMS OVERNIGHT. CAN NOT RULE OUT A FEW HOURS
OF REDUCED VIS AT ANB AND TCL...BUT WITH INCREASING CLOUDS DO NOT
THINK IT WILL BECOME A PROBLEM. FOR NOW WILL NOT MENTION BR IN THE
FORECAST. AS A SURFACE LOW APPROACHES FROM THE WEST TOMORROW
MORNING...EXPECT LIGHT RAIN SHOWERS TO SPREAD INTO CENTRAL ALABAMA
...FROM SOUTHWEST TO NORTHEAST. ACTIVITY WILL BECOME MORE WIDESPREAD
BY EARLY EVENING. RAIN WILL BE LIGHT...AND NOT EXPECTED TO REDUCE
VIS TO LOWER THAN MVFR.

14

&&

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

&&

$$









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