Areal Flood Advisory 21, NWS Birmingham, AL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
556 AM CST THU JAN 26 2012

.UPDATE...
FOR 12Z AVIATION DISCUSSION.

&&

.DISCUSSION...

THIS AM...WARM FRONT HAS PUSHED NORTHWARD SINCE YESTERDAY...
BRINGING WARM...MOIST AIR INTO CENTRAL ALABAMA TONIGHT.
HOWEVER...HIGHEST MID 60S AND GREATER DEW POINTS REMAIN TO OUR
SOUTH IN SRN AL NEAR THE COAST. COULD POSSIBLY SEE HIGHER DEW
POINTS GET INTO OUR FAR SW COUNTIES BEFORE MIDDAY IN A SMALL
WINDOW. BIGGEST CHANGE IN FORECAST IS THAT ALL MODELS CONSISTENT
IN BRINGING SYSTEM THROUGH A TAD SOONER. THIS MEANS MORE OF AN
AFTERNOON EARLY EVENING PASS OF THE STRONGER STORMS ALONG AND
AHEAD OF SURFACE FRONT. THIS WILL MEAN A SLIGHTLY BETTER CHANCE OF
SEVERE ACROSS THE AREA WITH THE MAIN LOW CLOSER DURING MORE OF THE
DAYTIME.

ALTHOUGH INSTABILITY PARAMETERS ARE STILL BEST ALONG THE SRN
MS/AL...WE ARE NOT OUT OF THE WOODS BY ANY MEANS. EXPECT HIGHER
DEW POINTS ACROSS THE SOUTHWEST 1/3 ALONG WITH SLIGHTLY HIGHER
CAPE TO BE REALIZED WITH THE SOONER ARRIVAL OF THE SYSTEM. LINE OF
STRONG TSTORMS POSSIBLE THIS AFTERNOON ACROSS THE WEST 1/3 18/21Z
TIME FRAME PUSHING EWD DURING THE AFTERNOON AND EARLY EVENING...
WITH INSTABILITIES DROPPING FURTHER SWD AS THE SYSTEM PROGRESSES.
A WEDGE OF DRIER AIR STILL PERSISTENT ACROSS THE NORTHEAST
COUNTIES. STRONGER STORMS NOW SHOULD BE GONE BY MIDNIGHT...IF NOT
BY AS EARLY ACROSS 9PM ACROSS THE EAST. WITH THE FASTER MOVEMENT
OF THE SYSTEM...STILL NOT CONFIDENT OF THE FLOODING THREAT ENOUGH
FOR A WATCH AT THIS TIME...EVEN WITH BUMPING UP QPF NUMBERS
SLIGHTLY...WITH ANYWHERE FROM 1.5 INCHES WEST TO .5 INCHES FAR
SE...ALONG WITH LOCALLY HIGHER AMOUNTS FOR THE EVENT.

ON FRIDAY WITH RETREATING FRONT...MODELS NOW WITH FASTER
PROGRESSION HAVE PRECIPITATION OUT BEFORE SUNRISE ON FRIDAY...SO
WILL GO WITH A DRY FORECAST FOR FRIDAY AS WEAK HIGH MOVES BUILDS.
ANOTHER REINFORCING FRONT MOVES THROUGH BY SATURDAY MORNING TO
BRING A BETTER SURFACE HIGH TO BUILD ACROSS THE CENTRAL U.S.
THIS WILL MAKE FOR A WELCOME DRY AND COOL WEEKEND INTO THE
BEGINNING OF NEXT WEEK BEFORE THE RIDGE MOVES OFF...GULF MOISTURE
RETURNS ALONG WITH RAIN CHANCES BY LATE TUESDAY INTO POSSIBLY
THURSDAY OF NEXT WEEK AHEAD OF YET ANOTHER SYSTEM.

08/MNK

&&

.AVIATION...
12Z TAF DISCUSSION.

WIDESPREAD RAINFALL IS MAKING ITS WAY INTO WESTERN ALABAMA THIS
MORNING...AND RAINFALL HAS OVERSPREAD KTCL. IFR STRATUS HAS ALSO
MOVED NORTHWARD OVER THE AREA AT KEET...KTOI...AND KMGM. THE LOW
STRATUS WILL CONTINUE THROUGH THE EARLY MORNING HOURS THEN SLOWLY
RISE THROUGH THE MORNING INTO MVFR CRITERIA WITH STRONG BOUNDARY
LAYER WINDS SETTING UP. BASED ON CURRENT MODEL TRENDS...HAVE GONE
AHEAD AND TIMED OUT INCREASING THUNDERSTORM ACTIVITY FROM WEST TO
EAST THROUGH THE AFTERNOON AND EVENING HOURS. STORMS LOOK TO BEGIN
AT KTCL FROM 15-17Z...CENTRAL TAF LOCATIONS AND KMGM FROM
18-20Z...AND KANB FROM 19-21Z. THE TIMING COULD CHANGE DEPENDING ON
THE LATEST TRENDS OF THE SHOWER AND THUNDERSTORM DEVELOPMENT.
THEREFORE...FREQUENT UPDATES AND AMENDMENTS ARE LIKELY TODAY. WINDS
WILL INCREASE OUT OF THE SOUTHEAST AHEAD OF THE COLD FRONT WITH
SUSTAINED WINDS OF 10-15 KNOTS AND GUSTS OVER 20 KNOTS. AS THE FRONT
CLEARS THE STATE LATE THIS EVENING...WINDS WILL SHIFT TO THE WEST
AND A LOW STRATUS DECK WILL LIKELY FORM INTO THE EARLY MORNING HOURS
ON FRIDAY. WENT AHEAD AND ADDED IN AN IFR STRATUS DECK FOR ALL TAF
LOCATIONS FOR PLANNING PURPOSES TOWARD THE END OF THE PERIOD.

56/GDG

&&

.PRELIMINARY POINT TEMPS/POPS...
GADSDEN     70  46  58  35  58 / 100  80  10   0   0
ANNISTON    71  47  60  36  59 / 100  80  10   0   0
BIRMINGHAM  71  45  59  37  59 / 100  80  10   0   0
TUSCALOOSA  71  44  61  36  60 / 100  60   0   0   0
CALERA      71  46  60  37  60 / 100  70  10   0   0
AUBURN      71  50  61  39  61 /  80  90  10   0   0
MONTGOMERY  75  51  64  39  64 /  90  80  10   0   0
TROY        74  51  64  38  64 /  80  80  10   0   0

&&

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

&&

08/56

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
156 PM CST THU JAN 26 2012

ALZ011>015-017>050-270400-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
156 PM CST THU JAN 26 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON...MAINLY SOUTH
OF I-20 AND EAST OF I-65. THE MAIN THREATS CONTINUE TO BE DAMAGING
WINDS AND LOCALIZED FLOODING...AS WELL AS MINOR RIVER FLOODING.
ISOLATED TORNADOES WILL ALSO BE POSSIBLE GENERALLY ALONG AND SOUTH OF
THE LINE FROM WEOGUFKA TO ROANOKE. THE THREAT OF SEVERE WEATHER
SHOULD BE OVER BY 6 PM.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

AS A DRY AIRMASS MOVES INTO THE SOUTHEAST ON MONDAY...LOW RELATIVE
HUMIDITIES FOR A NUMBER OF HOURS COULD POSSIBLY CREATE A HIGH FIRE
DANGER ACROSS THE SOUTHEASTERN COUNTIES ON MONDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT WILL
BE NEEDED THIS AFTERNOON.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1100 AM CST THU JAN 26 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1059 AM     HEAVY RAIN       GREENSBORO              32.70N 87.59W
01/26/2012  E0.00 INCH       HALE               AL   911 CALL CENTER

            MINOR STREET FLOODING REPORTED IN GREENSBORO.

&&

REM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1206 PM CST THU JAN 26 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1203 PM     HEAVY RAIN       CENTER POINT            33.64N 86.68W
01/26/2012  E0.00 INCH       JEFFERSON          AL   PUBLIC

            WATER REPORTED TO BE A COUPLE OF INCHES DEEP ON A COUPLE
            OF STREETS.

&&

REM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
137 PM CST THU JAN 26 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0135 PM     HEAVY RAIN       ALTOONA                 34.03N 86.33W
01/26/2012  E0.00 INCH       ETOWAH             AL   EMERGENCY MNGR

            WATER REPORTED ON A FEW ROADS IN THE ALTOONA AND WALNUT
            GROVE AREAS.

&&

REM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
154 PM CST THU JAN 26 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0147 PM     FLOOD            1 NNE CENTER POINT      33.65N 86.68W
01/26/2012                   JEFFERSON          AL   911 CALL CENTER

            SWEENEY HOLLOW ROAD REPORTS DITCHES FLOWING ACROSS
            ROADWAY. ROAD IS COVERED AND CLOSED.

&&

REM