Area Forecast Discussion
Issued by NWS Birmingham, AL

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000
FXUS64 KBMX 180236
AFDBMX

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

.UPDATE...
EVENING UPDATE.

&&

.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...
00Z TAF DISCUSSION.

VFR CONDS EXPECTED THROUGH THE PERIOD. SFC HIGH TO THE NORTH OF
ALABAMA WILL PRODUCE LIGHT NORTHERLY FLOW. SOME LIGHT FOG
POSSIBLE AT KTOI BETWEEN 1000 AND 1300 UTC.

58/ROSE


&&

.PREV DISCUSSION...
/ISSUED 304 PM CDT WED SEP 17 2014/

GOT A COUPLE OF LONE SHOWERS POPPING UP IN SOUTHEASTERN ALABAMA
THIS AFTERNOON...OTHERWISE RAINFREE CONDITIONS GOING INTO THE
EVENING HOURS.

SOME DRIER AIR WILL CONTINUE TO FILTER INTO THE AREA WITH LOWER
HUMIDITY VALUES THAN IN RECENT DAYS. NORTHWESTERLY FLOW ALOFT IS
BRINGING IN SOME WEAK LIFT TO THE DEEP SOUTH AND MIGHT BE ABLE TO
SQUEEZE OUT A FEW SPRINKLES OR AN ISOLATED SHOWER THURSDAY BUT
MOISTURE REMAINS TOO LIMITED TOO INCLUDE POPS AT THIS TIME.

SOME MOISTURE TRIES TO PUSH INTO EASTERN ALABAMA ON FRIDAY WITH A
BACKDOOR FRONT. AGAIN...WOULD NOT BE SURPRISED TO SEE AND ISOLATED
SHOWER OR TWO BUT CHANCES STILL TOO SMALL TO INCLUDE AT THIS TIME.

ANOTHER FRONT PUSHES IN FROM THE NORTH EARLY NEXT WEEK BUT TOO
LITTLE LIFT AND TOO LITTLE MOISTURE TO INCLUDE ANYTHING HIGHER
THAN SLIGHT CHANCE WORDING.

TEMPERATURES LOOK SEASONABLE WITH HIGHS MAINLY IN THE 80S AND LOWS
RANGING FROM THE MID 50S TO MID 60S DEPENDING ON MICRO-CLIMATE
EFFECTS.

88

&&

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

&&

$$






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