Flash Flood Warning 22, NWS Huntsville, AL

114 
WGUS74 KHUN 180305
FFSHUN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1005 PM CDT THU MAY 17 2012

ALC089-180430-
/O.CON.KHUN.FF.W.0022.000000T0000Z-120518T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON AL-
1005 PM CDT THU MAY 17 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR WEST CENTRAL MADISON
COUNTY UNTIL 1130 PM CDT...

AT 1003 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WERE WEAKENING ACROSS WEST CENTRAL INTO SOUTHWESTERN 
MADISON COUNTY.  LIGHT TO MODERATE RAINFALL WILL OCCUR THROUGH 
AROUND 10:30 PM.

ESTIMATED RAINFALL AMOUNTS OF 2 TO 3 INCHES FELL IN LESS THAN AN 
HOUR OVER SOUTHERN PORTIONS OF THE CITY OF MADISON TO WESTERN 
PORTIONS OF REDSTONE ARSENAL.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE BRIEF FLASH FLOODING 
TO OCCUR. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE MINOR FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

&&

LAT...LON 3472 8664 3463 8665 3462 8679 3471 8679

$$

KULA

880 
WGUS74 KHUN 180323
FFSHUN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1023 PM CDT THU MAY 17 2012

ALC089-180337-
/O.CAN.KHUN.FF.W.0022.000000T0000Z-120518T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON AL-
1023 PM CDT THU MAY 17 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WEST CENTRAL
MADISON COUNTY IS CANCELLED...

THUNDERSTORMS AND SHOWERS IN SOUTHWESTERN MADISON COUNTY ARE 
DIMINISHING OR ENDING.  ANY EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED 
OVER THE WARNED AREA.

MADISON COUNTY EMA AND CITY OF MADISON LAW ENFORCEMENT REPORT NO 
CURRENT FLASH FLOODING AT THIS TIME.

THUS...THE FLASH FLOODING HAS BEEN CANCELLED.

LAT...LON 3472 8664 3463 8665 3462 8679 3471 8679

$$

KULA

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
855 PM CDT THU MAY 17 2012

.UPDATE...
EVENING UPDATE

&&

.DISCUSSION...
LINGERING ISOLATED TSTMS CONTINUE ACROSS AN OUTFLOW BOUNDARY DRAPED W
TO E ACROSS NRN/N CNTRL AL THIS EVENING UNDER PARTLY CLOUDY SKIES.
WITH THIS SFC BOUNDARY IN PLACE COUPLED WITH LATENT HEATING EFFECTS
FROM EARLIER TODAY...A FEW TSTMS REMAIN POSSIBLE THROUGH MIDNIGHT
BEFORE DIMINISHING. LINGERING CLOUD COVER SHOULD ALSO BEGIN TO
DIMINISH GOING INTO THE OVERNIGHT PERIOD. AFTERWORDS...PATCHY DENSE
FOG IN SHELTERED/VALLEY AREAS LOOKS REASONABLE AS TEMPS/DEW PTS MIX
OUT INTO THE MID/UPPER 50S RANGE. AFTERNOON FORECAST/GRIDS HAVE BEEN
UPDATED TO ADD PRECIP ALONG/N OF THE OUTFLOW BOUNDARY THROUGH
MIDNIGHT...ALONG WITH A SLIGHT INCREASE IN CLOUD COVER THROUGH 06Z.
REMAINDER OF THE FORECAST LOOKS GOOD...AND NO OTHER UPDATES ARE
PLANNED AT THIS TIME.

09

&&

.AVIATION...
/ISSUED 610 PM CDT THU MAY 17 2012/
FOR 00Z TAFS...OUTSIDE OF LATE NIGHT/EARLY -BR...VFR CONDITIONS ARE
GENERALLY EXPECTED AT BOTH TAF SITES THROUGH THE TAF PERIOD. LIGHT
WINDS THIS EVENING WILL TURN MORE TOWARD THE SE LATE FRI MORNING.

09

&&

.PREV DISCUSSION...
/ISSUED 339 PM CDT THU MAY 17 2012/
CURRENTLY...WE WILL CONTINUE TO MONITOR THE PROGRESS OF WIDELY
SCATTERED SHOWERS AND THUNDERSTORMS ALONG AN AXIS EXTENDING FROM
NORTHERN MISSISSIPPI NORTHEASTWARD ACROSS NORTHWEST ALABAMA AND INTO
MUCH OF MIDDLE TENNESSEE. THE DEVELOPMENT OF THIS CONVECTION SEEMS TO
BE RELATED TO THE PRESENCE OF A WEAK RESIDUAL MID-LEVEL SHEAR AXIS
ACROSS WESTERN TENNESSEE/NORTHERN MISSISSIPPI WHICH WAS PREVIOUSLY
ASSOCIATED WITH A SMALL VORT MAX THAT DROPPED SOUTHEASTWARD ACROSS
THE MID-MISSISSIPPI VALLEY LATE LAST NIGHT. A WEAK NORTH-
NORTHEASTERLY STEERING FLOW AS DEPICTED ON MORNING RAOB DATA FROM
OHX/BMX SUGGESTS THAT THIS ACTIVITY AND ASSOCIATED OUTFLOW BOUNDARIES
WILL SHIFT SLOWLY SOUTHWARD THROUGH EARLY THIS EVENING -- AFFECTING
PRIMARILY THE SOUTHERN MIDDLE TENNESSEE COUNTIES AS WELL AS PARTS OF
NORTHWEST ALABAMA. ACROSS THE SOUTHEASTERN PORTION OF THE FORECAST
AREA...MID-LEVEL SUBSIDENCE ON THE WESTERN FLANK OF AN UPPER LOW
CUTTING OFF ACROSS GEORGIA/SOUTH CAROLINA WILL LEAD TO A
SIGNIFICANTLY LOWER COVERAGE OF SHOWERS AND STORMS. GIVEN THE
PRESENCE OF A GENERALLY WEAK WIND FLOW ALOFT...STORM ORGANIZATION IS
NOT EXPECTED -- BUT STEEP LOW-LEVEL LAPSE RATES MAY ALLOW GUSTY WINDS
TO DEVELOP WITH THE STRONGEST CELLS. WILL CARRY A SLIGHT CHANCE OF
SHOWERS/STORMS FOR THE PERIOD FROM 18/00-03Z IN THE VICINITY OF THE
CUMBERLAND PLATEAU...ALTHOUGH THE BULK OF THIS DIURNAL CONVECTION
WILL DIMINISH QUICKLY AFTER SUNSET. PATCHY FOG WILL BE POSSIBLE IN
THE LOCAL VALLEYS AND NEAR BODIES OF WATER...AND WILL CONTINUE TO
INCLUDE THIS IN THE FORECAST.

OVERALL...THERE HAVE BEEN NO MAJOR CHANGES IN RECENT MODEL GUIDANCE
REGARDING THE SHORT TERM FORECAST PERIOD...WITH A WEAK MID-LEVEL
SHEAR AXIS EXPECTED TO REMAIN POSITIONED ACROSS THE WESTERN HALF OF
THE FORECAST AREA TOMORROW. HAVE INCLUDED A SLIGHT CHANCE OF
SHOWERS/THUNDERSTORMS FOR ALL FORECAST ZONES TOMORROW...BASED ON THE
COVERAGE OF CONVECTION TO THE NORTHWEST TODAY AS WELL AS ON
EXPECTATIONS OF A SLIGHTLY MORE FAVORABLE ENVIRONMENT ALOFT AND
AVERAGE PWATS OF 1-1.20 INCHES NOTED ON FORECAST SOUNDINGS. ALTHOUGH
MORE SHOWERS AND STORMS MAY INDEED DEVELOP ACROSS THE TENNESSEE
VALLEY TOMORROW...STEERING FLOW WILL VEER TO THE EAST-SOUTHEAST AS A
MID-LEVEL HIGH STRENGTHENS OVER ILLINOIS/INDIANA -- DOWNSTREAM FROM A
SHORTWAVE TROUGH LIFTING NORTHEASTWARD ACROSS THE CENTRAL PLAINS.
FROM FRIDAY NIGHT INTO SATURDAY...GLOBAL MODELS INDICATE THAT THE
SOUTHERN GREAT LAKES HIGH WILL STRENGTHEN AND BUILD EASTWARD INTO NEW
ENGLAND AS A STRONG VORT MAX -- EMBEDDED WITHIN A BROAD LONG WAVE
TROUGH OVER WESTERN NORTH AMERICA...SHIFTS NORTHEASTWARD ONTO THE
CENTRAL HIGH PLAINS. THIS WILL FORCE THE SOUTHEASTERN U.S. UPPER LOW
TO SLOWLY RETROGRADE...MAINTAINING A NORTHEAST FLOW ALOFT ACROSS THE
LOCAL AREA. PWATS WILL LIKELY REMAIN HIGH ENOUGH ON SATURDAY TO
SUPPORT ISOLATED AFTERNOON CONVECTION...ESPECIALLY IF A WAVE PASSES
ACROSS THE REGION IN NORTHEAST FLOW ALOFT. TEMPERATURES WILL NOT
EXHIBIT MUCH VARIATION FOR THE NEXT COUPLE OF DAYS...WITH HIGHS
EXPECTED TO REACH THE MID/UPPER 80S AND LOWS EXPECTED TO FALL INTO
THE 55-60 DEGREE RANGE. LOW TEMPERATURES MAY ACTUALLY BE A FEW
DEGREES COOLER ON SUNDAY MORNING...AS SOME MODELS INDICATE A WEDGE OF
DRIER AIR SPREADING NORTHWESTWARD INTO THE AREA AROUND THE BASE OF
THE SOUTHERN APPALACHIANS.

IN THE EXTENDED FORECAST...VERY LITTLE CHANGE TO THE GENERAL SYNOPTIC
PATTERN IS EXPECTED ON SUNDAY...WITH TEMPERATURES PERHAPS THE
WARMEST OF THE ENTIRE FORECAST PERIOD. HOWEVER...IT APPEARS THAT THE
PESKY SOUTHEASTERN U.S. UPPER LOW WILL BEGIN TO LIFT NORTHEASTWARD UP
THE MID-ATLANTIC COAST FROM SUNDAY NIGHT INTO MONDAY AS SHORTWAVE
RIDGING STRENGTHENS DOWNSTREAM FROM THE SOUTHERN END OF THE CANADIAN
LONG WAVE TROUGH. THE EASTWARD PROGRESSION OF THIS LONG WAVE FEATURE
WILL LIKELY RESULT IN THE NEXT SUBSTANTIAL CHANCE FOR PRECIPITATION
ACROSS THE FORECAST AREA...ALTHOUGH THE ECMWF SUGGESTS THAT THE
SOUTHERN END OF THE TROUGH MAY BE MORE AMPLIFIED THAN THE GFS
INDICATES. HAVE INCREASED POPS/CLOUD COVER AND DECREASED TEMPERATURES
A BIT DURING THE PERIOD FROM MONDAY NIGHT INTO TUESDAY TO ACCOUNT FOR
THE EASTWARD MOVEMENT OF THIS WAVE OVER THE TENNESSEE VALLEY. A
BENIGN ZONAL FLOW WILL PERSIST IN THE WAKE OF THE TROUGH...WITH HIGH
TEMPERATURES REBOUNDING WELL INTO THE UPPER 80S BY THE END OF THE
FORECAST PERIOD.

70/DD

&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...NONE.
TN...NONE.
&&

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE
AT WEATHER.GOV/HUNTSVILLE.

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
905 PM CDT THU MAY 17 2012

ALZ001>010-016-TNZ076-096-097-181100-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
905 PM CDT THU MAY 17 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS
OF SOUTHERN MIDDLE TENNESSEE.

.DAY ONE...TONIGHT...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

ISOLATED THUNDERSTORMS ALONG AN OLD OUTFLOW BOUNDARY REMAIN POSSIBLE
THROUGH MIDNIGHT. BRIEF GUSTY WINDS AROUND 40 MPH AND OCCASIONAL
CLOUD TO GROUND ARE POSSIBLE WITH ANY STRONG STORMS.

PATCHY DENSE FOG IS EXPECTED LATE TONIGHT...PARTICULARLY IN VALLEYS
AND NEAR BODIES OF WATER. THE VISIBILITY WITHIN THE FOG MAY BE ONE
QUARTER OF A MILE OF LESS AT TIMES.

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

ISOLATED THUNDERSTORMS WILL AGAIN BE POSSIBLE FRIDAY AND SATURDAY
AFTERNOON. STORMS MAY BECOME MORE SCATTERED IN NATURE ON MONDAY AS
WEAK DISTURBANCES MOVE NEAR THE TENNESSEE VALLEY. GUSTY WINDS MAY
ACCOMPANY THE STORMS...ALONG WITH OCCASIONAL LIGHTNING AND BRIEF
HEAVY RAINFALL.

.SPOTTER CALL TO ACTION STATEMENT...

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

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
426 PM CDT THU MAY 17 2012

ALZ001-172200-
LAUDERDALE-
426 PM CDT THU MAY 17 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN LAUDERDALE COUNTY UNTIL
500 PM CDT...

AT 426 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR IRON CITY...OR 11 MILES NORTHEAST OF
UNDERWOOD-PETERSVILLE...MOVING SOUTH AT 5 MPH.

WINDS UP TO 40 MPH AND FREQUENT CLOUD TO GROUND LIGHTNING ARE
EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  GREEN HILL.
  KINGTOWN.

REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO THE
STORM TO BE STRUCK BY LIGHTNING. SEEK SAFE SHELTER IMMEDIATELY.

&&

LAT...LON 3501 8744 3490 8737 3490 8762 3501 8762
      3501 8753
TIME...MOT...LOC 2126Z 338DEG 5KT 3500 8757

KULA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
712 PM CDT THU MAY 17 2012

ALZ006-180045-
MADISON-
712 PM CDT THU MAY 17 2012

...SIGNIFICANT WEATHER ADVISORY FOR MADISON COUNTY UNTIL 745 PM
CDT...

AT 7102PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM 6 MILES NORTHWEST OF HUNTSVILLE...MOVING
SOUTHWEST AT 5 MPH.

PEA SIZE HAIL AND WINDS UP TO 40 MPH ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  UNIVERSITY OF ALABAMA IN HUNTSVILLE.
  MONROVIA.
  MADISON.

REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO THE
STORM TO BE STRUCK BY LIGHTNING. SEEK SAFE SHELTER IMMEDIATELY.

&&

LAT...LON 3467 8668 3474 8679 3484 8677 3484 8670
      3480 8658
TIME...MOT...LOC 0012Z 033DEG 5KT 3478 8667

KULA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
713 PM CDT THU MAY 17 2012

TNZ097-180045-
FRANKLIN-
713 PM CDT THU MAY 17 2012

...SIGNIFICANT WEATHER ADVISORY FOR FRANKLIN COUNTY UNTIL 745 PM
CDT...

AT 714 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM NEAR WINCHESTER...MOVING SOUTHWEST AT 5 MPH.

PEA SIZE HAIL AND WINDS UP TO 40 MPH ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  BELVIDERE.
  MAXWELL.

REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO THE
STORM TO BE STRUCK BY LIGHTNING. SEEK SAFE SHELTER IMMEDIATELY.

&&

LAT...LON 3499 8611 3509 8628 3521 8611 3516 8601
TIME...MOT...LOC 0014Z 035DEG 6KT 3513 8609

KULA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
736 PM CDT THU MAY 17 2012

TNZ097-180100-
FRANKLIN-
736 PM CDT THU MAY 17 2012

...SIGNIFICANT WEATHER ADVISORY FOR FRANKLIN COUNTY UNTIL 800 PM
CDT...

AT 736 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM ABOUT 5 MILES SOUTH OF WINCHESTER...MOVING
SOUTHWEST AT 10 MPH.

PEA SIZE HAIL...WINDS UP TO 40 MPH...AND FREQUENT CLOUD TO GROUND
LIGHTNING ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
   RURAL LOCATIONS OF SOUTH CENTRAL AND SOUTHWEST FRANKLIN COUNTY.

SEEK SHELTER AND STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3500 8608 3500 8625 3518 8611 3517 8601
TIME...MOT...LOC 0036Z 023DEG 9KT 3511 8611

KULA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
850 PM CDT THU MAY 17 2012

ALZ005-006-180215-
LIMESTONE-MADISON-
850 PM CDT THU MAY 17 2012

...SIGNIFICANT WEATHER ADVISORY FOR LIMESTONE AND MADISON COUNTIES
UNTIL 915 PM CDT...

AT 849 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR MADISON. THIS STORM WAS NEARLY STATIONARY.

WINDS UP TO 50 MPH ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  REDSTONE ARSENAL.
  MADISON...UNIVERSITY OF ALABAMA IN HUNTSVILLE.

THE GUSTY WINDS WILL BE CAPABLE OF KNOCKING DOWN SMALL TREE LIMBS.
SEEK SAFE SHELTER UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3478 8663 3459 8662 3457 8687 3471 8686
TIME...MOT...LOC 0149Z 183DEG 1KT 3468 8674

KULA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
906 PM CDT THU MAY 17 2012

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

0845 PM     TSTM WND GST     4 W HUNTSVILLE          34.71N 86.71W
05/17/2012  E55 MPH          MADISON            AL   NWS EMPLOYEE

            WINDS ESTIMATED AT 50 TO 60 MPH WERE REPORTED NEAR THE
            INTERSECTION OF OLD MADISON PIKE AND SLAUGHTER ROAD.

&&

KULA