Alert archive / Alabama / Flash Flood Warnings in 2009
Flash Flood Warning 69, NWS Huntsville, AL
NWS Huntsville, AL issued this flash flood warning at Sep 8, 2009, 3:58 PM CDT for Madison County, Alabama. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 8, 2009, 3:58 PM CDT (20:58 UTC)
- Expired
- Sep 8, 2009, 7:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Madison County, AL
The radar
The Northeast Alabama radar (KHTX), 46 km from the middle of the area, began a volume at 21:03 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 9.0 hours before the alert went out and 152 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1139 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 871 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Huntsville, AL wrote its last area forecast discussion before this flash flood warning went out at Sep 8, 2:38 PM CDT, 1 hour 20 minutes earlier.
Area forecast discussion, Sep 8, 2:38 PM CDT, 1 hour 20 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HUNTSVILLE AL 238 PM CDT TUE SEP 8 2009 .SHORT TERM...THROUGH THURSDAY NIGHT... AFTN WATER VAPOR IMAGERY STILL DEPICTS A CLOSED UPPER LOW OVER THE OHIO VALLEY...WITH SEVERAL SPOKES OF ENERGY CIRCULATING AROUND ITS CENTER. ONE SUCH SPOKE IS ARGUABLY PUSHING INTO THE TENNESSEE VALLEY ATTM...PROMPTING CONVECTIVE DEVELOPMENT IN SEVERAL DIFFERENT AREAS ACROSS TN/MS/AL. MUCH OF THE ISLTD-SCTD SHRA/TSRA HAVE FORMED IN A WEAK CONVERGENCE ZONE OVER NWRN AL...WHILE ADDITIONAL ACTIVITY ACROSS NERN AL HAS BEEN TERRAIN-FORCED TO SOME EXTENT. MINIMAL CLOUD COVER EARLIER TODAY RESULTED IN STRONG HEATING...SO TEMPERATURES IN SEVERAL LOCATIONS ARE APPROACHING THE 90F MARK...AND LIKE YESTERDAY SEVERAL STORMS HAVE DEVELOPED FAIRLY IMPRESSIVE ELEVATED CORES. SHORT TERM FORECAST REMAINS FOCUSED ON PRECIP CHANCES...AND WHAT IF ANY ADDITIONAL FORCING MECHANISMS MAY COME INTO PLAY. THE UPPER LOW IS PROGGED TO WOBBLE AROUND THE OHIO VALLEY/MID-ATLANTIC REGION THRU THE REST OF THE PD. 12Z MODELS DO NOT BRING MANY EMBEDDED WAVES THRU THE CENTRAL TENN VALLEY...PREFERRING TO KEEP MOST OF THEM NORTH AND EAST OF THE AREA. WILL NOT BE SURPRISED IF THAT CHANGES OVER THE NEXT FEW MDL RUNS...REQUIRING AT LEAST SOME MODEST ADJUSTMENT TO THE POPS. BUT FOR THE TIME BEING...FEEL THE MAINLY-DIURNAL ISLTD POP FCST IS STILL THE BEST ONE...ESPECIALLY IF THE WEAK CONVERGENCE AXIS CURRENTLY DRAPED ACROSS THE AREA DOES NOT REMAIN IN PLACE /AS THE 12KM NAM INDICATES/. SINCE TEMPERATURES TODAY SKYROCKETED EARLY AND HAVE HOVERED ABOVE GUIDANCE...WILL ADD A DEGREE OR TWO TO MOS FOR HIGHS TMRW AND THURSDAY. A MOS BLEND HAS WORKED WELL FOR LOWS AND WILL CONTINUE WITH THAT TREND. .LONG TERM...FRIDAY THROUGH TUESDAY... EXTENDED CONTINUES TO LOOK HIGHLY AMPLIFIED AND RATHER UNSETTLED. THE 12Z GFS CAME IN WITH A COMPLETELY NEW SOLUTION THAT DOES NOT RESEMBLE THE GFS ENSEMBLE MEAN OR ANY OTHER MED-RANGE GUIDANCE...SO IT IS DISCOUNTED ATTM. THE 12Z ECMWF AND 12Z GEFS MEAN ARE MORE CONSISTENT WITH PAST FCSTS...WHERE THE UPPER LOW OVER THE NERN CONUS IS KICKED OUT TO SEA...ONLY TO BE REPLACED BY A LARGE/EXPANSIVE LOW OVER THE UPPER MIDWEST. THE 12Z ECMWF IS MORE AGGRESSIVE THAN PAST RUNS WITH A SHORTWAVE EJECTING OUT OF THE BASE OF THE MEAN TROUGH. THIS WOULD SUPPORT HIGHER POPS FOR THE SATURDAY-TUESDAY TIME FRAME AND WILL CONTINUE THAT MINDSET WITH THIS FCST. IF TRENDS HOLD...FEEL THERE IS A PRETTY GOOD CHANCE OF RAIN...BUT WOULD PREFER TO SEE BETTER MODEL CONSISTENCY BEFORE INCREASING POPS MARKEDLY IN THE FCST. THE 00Z GFSX MOS HAD BETTER INPUT FROM ITS PARENT MODEL...AND ITS TEMPERATURE VALUES LOOK QUITE REASONABLE IN LIGHT OF THE MORE UNSETTLED PATTERN. && .PRELIMINARY POINT TEMPS/POPS... HUNTSVILLE 64 89 64 88 65 / 10 20 10 20 10 SHOALS 63 89 62 88 64 / 10 20 10 20 10 VINEMONT 65 88 65 87 65 / 10 20 10 20 10 FAYETTEVILLE 62 88 62 87 63 / 10 20 10 20 10 ALBERTVILLE 64 88 64 87 65 / 10 20 10 20 10 FORT PAYNE 61 88 63 86 62 / 10 20 10 20 10 && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && BCC
Hazardous weather outlook, Sep 8, 3:15 PM CDT, 43 minutes before
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Special weather statement, Sep 8, 1:36 PM CDT, 2 hours 22 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 136 PM CDT TUE SEP 8 2009 ALZ002-081915- COLBERT- 136 PM CDT TUE SEP 8 2009 ...SIGNIFICANT WEATHER ALERT FOR COLBERT COUNTY UNTIL 215 PM CDT... AT 135 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR TUSCUMBIA...MOVING EAST AT 15 MPH. DIME SIZE HAIL AND WINDS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. * LOCATIONS IN OR NEAR THE PATH INCLUDE... TUSCUMBIA. MUSCLE SHOALS. COLBERT HEIGHTS. LITTLEVILLE. SPRING VALLEY...LITTLEVILLE. WHITEOAK...LEIGHTON. THIS THUNDERSTORM COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A WARNING IS ISSUED. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS CONCERNING THIS WEATHER SITUATION. KNS/33
Special weather statement, Sep 8, 2:16 PM CDT, 1 hour 42 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 216 PM CDT TUE SEP 8 2009 ALZ002-004-082015- COLBERT-LAWRENCE- 216 PM CDT TUE SEP 8 2009 ...SIGNIFICANT WEATHER ALERT FOR COLBERT AND LAWRENCE COUNTIES UNTIL 315 PM CDT... AT 214 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM FORD CITY TO SPRING VALLEY...OR ALONG A LINE EXTENDING FROM 9 MILES EAST OF MUSCLE SHOALS TO 7 MILES SOUTH OF MUSCLE SHOALS...MOVING EAST AT 10 MPH. DIME SIZE HAIL AND WINDS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS. * LOCATIONS IN OR NEAR THE PATH INCLUDE... LEIGHTON. WHITEOAK. LA GRANGE. RED BANK...TOWN CREEK. THIS THUNDERSTORM COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A WARNING IS ISSUED. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS CONCERNING THIS WEATHER SITUATION. KNS/33
Special weather statement, Sep 8, 2:23 PM CDT, 1 hour 35 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 223 PM CDT TUE SEP 8 2009 ALZ004-007-082015- LAWRENCE-MORGAN- 223 PM CDT TUE SEP 8 2009 ...SIGNIFICANT WEATHER ALERT FOR LAWRENCE AND MORGAN COUNTIES UNTIL 315 PM CDT... AT 222 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM MT HOPE TO WREN TO SPEAKE...OR ALONG A LINE EXTENDING FROM 11 MILES SOUTHWEST OF MOULTON TO 7 MILES SOUTH OF MOULTON TO 11 MILES SOUTHEAST OF MOULTON...MOVING SOUTHEAST AT 10 MPH. DIME SIZE HAIL AND WINDS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS. * LOCATIONS IN OR NEAR THE PATH INCLUDE... DANVILLE. MASSEY. LACON. THE GUSTY WINDS WILL BE CAPABLE OF KNOCKING DOWN SMALL TREES...TREE LIMBS...AND POWERLINES. SEEK SAFE SHELTER UNTIL THE STORM HAS PASSED. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS CONCERNING THIS WEATHER SITUATION. KNS/33
Special weather statement, Sep 8, 2:51 PM CDT, 1 hour 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 251 PM CDT TUE SEP 8 2009 ALZ001-004-005-082030- LAUDERDALE-LAWRENCE-LIMESTONE- 251 PM CDT TUE SEP 8 2009 ...SIGNIFICANT WEATHER ALERT FOR LAUDERDALE...LAWRENCE AND LIMESTONE COUNTIES UNTIL 330 PM CDT... AT 251 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 5 MILES NORTH OF LEGGTOWN TO OLIVER...OR ALONG A LINE EXTENDING FROM 12 MILES SOUTH OF PULASKI TO 15 MILES WEST OF ATHENS...MOVING EAST AT 10 MPH. WINDS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS. * LOCATIONS IN OR NEAR THE PATH INCLUDE... LEGGTOWN...CAIRO. COXEY. CARTWRIGHT...ELKMONT. THIS THUNDERSTORM COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A WARNING IS ISSUED. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS CONCERNING THIS WEATHER SITUATION.
Special weather statement, Sep 8, 3:17 PM CDT, 41 minutes before
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</html>Local storm report, Sep 8, 3:41 PM CDT, 17 minutes before
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</html>The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 2:55 PM CDT | Severe Thunderstorm Warning | HUN | Lauderdale, Lawrence, Limestone | 28 min |
| Sep 8, 3:01 PM CDT | Severe Thunderstorm Warning | HUN | Madison | 44 min |
| Sep 8, 3:28 PM CDT | Severe Thunderstorm Warning | HUN | Franklin, Lawrence | 47 min |
Nearby
Flash Flood Warnings in Alabama, 2009Every flash flood warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.