River Flood Warning 48, NWS Birmingham, AL

283 
WGUS84 KBMX 280121
FLSBMX
BULLETIN - IMMEDIATE BROADCAST REQUESTED 
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE BIRMINGHAM AL
721 PM CST SAT DEC 27 2014


...THE FLOOD WARNING IS CANCELLED FOR THE TOMBIGBEE RIVER AT BEVILL 
LOCK AND DAM...

.RISES ARE NOT EXPECTED TO BE AS GREAT AS EARLIER FORECAST FOR THE 
TOMBIGBEE RIVER AT BEVILL LOCK AND DAM...AND THE RIVER IS EXPECTED TO
CREST JUST BELOW FLOOD STAGE. THE FLOOD WARNING IS NO LONGER IN EFFECT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE CARS THROUGH FLOODED AREAS.  TURN AROUND...DON'T DROWN. 

THIS WILL BE THE LAST STATEMENT ISSUED ON THIS EVENT...UNLESS CONDITIONS
CHANGE. 

&&

ALC063-065-091-107-119-280151-
/O.CAN.KBMX.FL.W.0048.000000T0000Z-141231T1905Z/
/AVLA1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
721 PM CST SAT DEC 27 2014

THE FLOOD WARNING IS CANCELLED FOR
  THE TOMBIGBEE RIVER AT BEVILL LOCK AND DAM.
* AT  6:00 PM SATURDAY THE STAGE WAS 115.1 FEET. 
* FLOOD STAGE IS 122.0 FEET. 
* FORECAST...THE RIVER WILL CREST BELOW FLOOD STAGE AT 121.6 FEET EARLY 
  TUESDAY MORNING.
* IMPACT...AT 122.0 FEET...CATTLE IN LOW-LYING AREAS OF SOUTHERN 
  PICKENS COUNTY SHOULD BE MOVED TO HIGHER GROUND. CATTLE ARE CUTOFF 
  IN LOWLANDS OF SOUTHERN PICKENS COUNTY AT STAGES ABOVE 122 FEET.

&&

LAT...LON 3321 8827 3307 8816 3287 8813 3285 8822
          3301 8825 3320 8832         

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
557 AM CST SAT DEC 27 2014

.UPDATE...
FOR 12Z AVIATION.

&&

.SHORT TERM...
TODAY THROUGH MONDAY.

THE SOUTHERN STREAM REMAINS VERY ACTIVE OVER THE NEXT COUPLE OF
DAYS...AND WE'LL SEE THE POSSIBILITY OF SOME FLOODING CONCERNS WITH
HEAVY RAINFALL POTENTIAL. AS WE LOOK OUT THE WINDOW THIS
MORNING...THE RAIN IS ALREADY MOVING IN EARLIER THAN EXPECTED
THROUGHOUT OUR WESTERN COUNTIES ASSOCIATED WITH AN UPPER SHORTWAVE
IMPULSE MOVING THROUGH THE SOUTHWEST FLOW ALOFT. THE LIFT IS BEING
AIDED BY 850MB WINDS OF AROUND 30 KNOTS OR SO...AND PLENTY OF
MOISTURE TRANSPORT. THEREFORE...MEASURABLE RAIN CONTINUES TO
DEVELOP AND PROGRESS NORTHEASTWARD EARLY THIS MORNING AND HAVE
ADJUSTED FORECAST GRIDS ACCORDINGLY. AS SURFACE FLOW TURNS TOWARD
THE SOUTH THIS AFTERNOON...WARM AIR AND MOISTURE ADVECTION WILL
REALLY KICK IN OUT AHEAD OF A DEVELOPING SURFACE LOW ALONG THE
LOUISIANA COASTLINE. A WARM FRONT WILL PROGRESS NORTHWARD INTO AT
LEAST THE SOUTHERN HALF OF CENTRAL ALABAMA BY SUNDAY MORNING WITH
DEWPOINTS SURGING INTO THE LOW TO MID 60S.

SEVERAL FACTORS APPEAR TO BE COMING TOGETHER FOR THE POSSIBILITY OF
FLASH FLOODING STARTING TODAY AND POSSIBLY LASTING THROUGH MONDAY
MORNING. FIRST...PWATS WITH THIS SYSTEM ARE EXPECTED TO BE VERY HIGH
ONCE AGAIN...AROUND 2 TO 2.5 STANDARD DEVIATIONS ABOVE NORMAL FOR
THIS TIME OF THE YEAR. JET DYNAMICS ARE QUITE FAVORABLE FOR
CONTINUED DEVELOPMENT OF HEAVY RAINFALL WITH EMBEDDED
THUNDERSTORMS. MUCH OF THE SOUTHEAST WILL BE IN THE RIGHT-REAR
QUADRANT OF A RAPIDLY DEVELOPING JET STREAK ACROSS THE OHIO VALLEY
AND GREAT LAKES STATES. WITH PLENTY OF UPPER DIVERGENCE...LIFT...AND
MOISTURE TO WORK WITH...THEN COMES THE POTENTIAL FOR TRAINING
CONVECTIVE DEVELOPMENT. TAKING A LOOK AT THE FORWARD PROPAGATING
CORFIDI VECTORS AND 0-6KM MEAN WIND VECTORS...THEY WILL BE
BASICALLY PARALLEL AS THIS SYSTEM PROGRESSES EASTWARD OVERNIGHT
TONIGHT THROUGH THE DAY ON SUNDAY. TRAINING AREAS OF HEAVY
RAINFALL WITH EMBEDDED STORMS WILL BE A GOOD BET WITH THIS SETUP.
THE NEXT CHALLENGE WILL BE WHERE THE HEAVIEST RAINFALL WILL BE
ALLOWED TO SET UP. GLOBAL/HI-RES MODELS HAVE GENERALLY AGREED IN A
CORRIDOR OF HEAVY RAIN ALONG OR JUST SOUTH OF THE I-20 CORRIDOR
STARTING THIS EVENING AND LASTING THROUGH SUNDAY AFTERNOON. WITH
ALL THE HEAVY RAIN THAT WE RECEIVED ON THE 23RD AND REPORTS OF
FLOODING WITH THAT SYSTEM...WE'RE CONCERNED THAT IF ANY TRAINING
DOES OCCUR THAT WE'LL SEE FLASH FLOOD CONDITIONS OCCURRING QUICKLY
WITH SATURATED GROUND CONDITIONS. STREAM FLOWS ARE ALSO AT THE
75TH PERCENTILE OR HIGHER AT THE CURRENT TIME WHICH WILL MEAN THAT
RIVER AND STREAM FLOODING WILL ALSO BE A POSSIBILITY. ANOTHER WAVE
OF RAINFALL IS EXPECTED LATE SUNDAY INTO EARLY MONDAY MORNING
ASSOCIATED WITH AN UPPER SHORTWAVE THAT WILL KICK THE SURFACE LOW
OFF TO OUR EAST. ALTHOUGH LIGHTER AMOUNTS OF RAIN ARE EXPECTED
WITH THAT FEATURE...ADDITIONAL RUNOFF WILL BE LIKELY AND POSSIBLY
AGGRAVATE ALREADY SATURATED CONDITIONS EVEN MORE.

WE'RE GOING TO GO AHEAD WITH A FLASH FLOOD WATCH THAT COVERS THE
WESTERN HALF OF CENTRAL ALABAMA AND COUNTIES JUST TO THE EAST OF
I-65. THE WATCH WILL COVER THE AREA OF GREATEST POTENTIAL TO
RECEIVE BASIN AVERAGE RAINFALL AMOUNTS OF 2 TO 3 INCHES. LOCALLY
HIGHER AMOUNTS OF OVER 4 INCHES WILL ALSO BE POSSIBLE THROUGH
MONDAY MORNING. THE FLASH FLOOD WATCH COULD POTENTIALLY BE
EXTENDED FARTHER EASTWARD/SOUTHWARD BASED ON THE LATEST TRENDS
THROUGH THE DAY TODAY. NOW TALKING ABOUT THUNDERSTORM
POTENTIAL...INSTABILITY VALUES WILL BE MEAGER BECAUSE OF ALL THE
CLOUDS AND RAIN...BUT EMBEDDED THUNDER WILL DEFINITELY BE
EXPECTED. THE FARTHER SOUTH YOU GO THE BETTER THE CHANCE OF A
SEVERE STORM OR TWO ESPECIALLY ALONG THE GULF COAST. WE'LL WATCH
CLOSELY FOR THE POTENTIAL OF A FEW SEVERE STORMS DEVELOPING DUE TO
THE INCREASING LOW LEVEL JET AND PLENTIFUL MOISTURE ACROSS OUR FAR
SOUTHERN TIER OF COUNTIES...BUT THE THREAT ISN'T HIGH ENOUGH TO
MENTION IN THE HWO AT THIS TIME.

.LONG TERM...
TUESDAY THROUGH FRIDAY.

NOT MUCH HAS CHANGED WITH THE PREVIOUS LONG TERM FORECAST DURING
THIS PERIOD...WITH DRY DAYS EXPECTED TUESDAY THROUGH MUCH OF THE DAY
ON THURSDAY. GENERALLY BELOW AVERAGE TEMPERATURES ARE EXPECTED WITH
HIGHS IN THE UPPER 40S/LOWER 50S AND LOWS IN THE UPPER 20S/LOWER
30S. THE SOUTHERN STREAM STAYS ACTIVE HOWEVER...WITH YET ANOTHER
SIGNIFICANT RAIN EVENT EXPECTED BY FRIDAY AND INTO NEXT WEEKEND
ACCORDING TO LONG RANGE GUIDANCE.

56/GDG

&&

.AVIATION...
12Z TAF DISCUSSION.

FORECAST REMAINS A BIT TRICKY THE FIRST 12 HOURS OR SO. THE MODEL
CONSENSUS IS WAY OFF ON THE TIMING OF THE APPROACHING CONVECTION.
SHOWERS AND A FEW THUNDERSTORMS ARE ALREADY AFFECTING TCL/BHM/EET
AT ISSUANCE. DUE TO THE VERY DRY AIR THAT WAS IN PLACE...CEILINGS
ARE LOWERING BUT ARE GENERALLY STILL VFR. CONTINUED THE TREND OF
RAIN AND LOWERING CEILINGS THROUGHOUT THE DAY. WENT WITH THE
NORTHERN SITES MVFR IN A FEW HOURS AND IFR BY AROUND 00Z...WHICH
IS AN INCREASE IN TIMING FOR THE LOWERED CEILINGS. THE SOUTHERN
SITES WILL HIT MVFR BY MID AFTERNOON.

THE INCREASED LOW LEVEL WINDS AND DISTURBANCE MOVING NORTHEAST
ACROSS THE AREA AND PRODUCING THE RAIN WILL MOVE OFF WITH
ADDITIONAL DEVELOPMENT AND INCREASE IN RAIN COVERAGE AGAIN INTO
THE AFTERNOON. THE MAIN CHALLENGE THIS PERIOD WILL BE THE TIMING
OF THE ONSET OF THE RESTRICTIONS. ADDITIONAL RAIN AND SOME THUNDER
EXPECTED OVERNIGHT WITH LOW CEILINGS AND REDUCED VIS.

THESE CONDITIONS WILL PERSIST INTO SUNDAY.

75

&&

.PRELIMINARY POINT TEMPS/POPS...
GADSDEN     57  52  61  49  57 /  90 100 100  80  20
ANNISTON    61  53  65  51  60 /  90 100 100  80  20
BIRMINGHAM  57  53  63  48  57 /  90 100 100  80  20
TUSCALOOSA  56  55  64  47  56 / 100 100 100  80  20
CALERA      58  54  65  50  58 /  90 100 100  80  20
AUBURN      60  55  67  56  67 /  60  80  70  70  20
MONTGOMERY  63  56  72  55  67 /  60  90  80  70  20
TROY        65  57  72  58  69 /  40  60  60  70  20

&&

.BMX WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH FROM NOON CST TODAY THROUGH LATE SUNDAY NIGHT
FOR THE FOLLOWING COUNTIES: AUTAUGA...BIBB...BLOUNT...CHILTON...
COOSA...DALLAS...ELMORE...FAYETTE...GREENE...HALE...JEFFERSON...
LAMAR...MARENGO...MARION...PERRY...PICKENS...SHELBY...ST.
CLAIR...SUMTER...TALLADEGA...TUSCALOOSA...WALKER...WINSTON.

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
445 AM CST SAT DEC 27 2014

ALZ011>015-017>050-281045-
MARION-LAMAR-FAYETTE-WINSTON-WALKER-BLOUNT-ETOWAH-CALHOUN-CHEROKEE-
CLEBURNE-PICKENS-TUSCALOOSA-JEFFERSON-SHELBY-ST. CLAIR-TALLADEGA-
CLAY-RANDOLPH-SUMTER-GREENE-HALE-PERRY-BIBB-CHILTON-COOSA-TALLAPOOSA-
CHAMBERS-MARENGO-DALLAS-AUTAUGA-LOWNDES-ELMORE-MONTGOMERY-MACON-
BULLOCK-LEE-RUSSELL-PIKE-BARBOUR-
445 AM CST SAT DEC 27 2014

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

.DAY ONE...TODAY AND TONIGHT.

RAIN WILL SPREAD WEST TO EAST ACROSS MUCH OF CENTRAL ALABAMA BY THIS
AFTERNOON AND GRADUALLY INCREASE IN INTENSITY. RAIN AMOUNTS AROUND 2
INCHES ARE POSSIBLE THROUGH TONIGHT...WITH LOCALLY HIGHER AMOUNTS
POSSIBLE. THESE RAIN AMOUNTS MAY PRODUCE SOME FLOODING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

ADDITIONAL RAIN ON SUNDAY AND SUNDAY NIGHT MAY CONTINUE THE THREAT
OF FLOODING. AMOUNTS AROUND 1 INCH ARE POSSIBLE THIS PERIOD WITH
LOCALLY HIGHER AMOUNTS POSSIBLE.

MINOR RIVER FLOODING WILL BECOME POSSIBLE WITH THESE RAIN
AMOUNTS...ESPECIALLY BASINS IN WESTERN ALABAMA.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT IS NOT
EXPECTED AT THIS TIME.