Issued by NWS Birmingham, AL
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000 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. && $$
