Alert archive / Alabama / Flash Flood Warnings in 2009

Flash Flood Warning 49, NWS Mobile, AL

September 16, 2009Choctaw County, Clarke County, Alabama

NWS Mobile, AL issued this flash flood warning at Sep 16, 2009, 6:27 PM CDT for Choctaw County, Clarke County, Alabama. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 16, 2009, 6:27 PM CDT (23:27 UTC)
Expired
Sep 16, 2009, 8:30 PM CDT
In force
2 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Choctaw County, AL, Clarke County, AL

The radar

The Mobile radar (KMOB), 144 km from the middle of the area, began a volume at 23:29 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

Birmingham, AL (KBMX), launched 12:00Z, 11.5 hours before the alert went out and 181 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.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2009-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1274 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2009-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1274 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
460 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KMOB 162327
FFWMOB
ALC023-025-170130-
/O.NEW.KMOB.FF.W.0049.090916T2327Z-090917T0130Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
627 PM CDT WED SEP 16 2009

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEAST CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
  NORTHWESTERN CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 830 PM CDT

* AT 625 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED VERY HEAVY
  RAIN FROM A THUNDERSTORM NEAR WOODS BLUFF...OR 17 MILES SOUTHEAST
  OF BUTLER...MOVING NORTHEAST AT 10 MPH.

* THE THUNDERSTORM PRODUCING VERY HEAVY RAIN WILL BE NEAR...
  OPINE BY 635 PM CDT...
  MORVIN BY 700 PM CDT...
  HOLTAMVILLE BY 710 PM CDT...

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
TISHLARKA CREEK...TOMBIGBEE RIVER...ESTIS MILL CREEK...RIDGE CREEK...
SURVEYORS CREEK...DEEP CREEK...BASHI CREEK...WITCH CREEK...TALLAWAMPA
CREEK...OKATUPPA CREEK...PACE CREEK...TURKEY CREEK...ULCANUSH
CREEK...SALITPA CREEK...LITTLE HARRIS CREEK...JONES BRANCH...
TALLAHATTA CREEK...LITTLE BUNNY CREEK...BIG BUNNY CREEK...HARRIS
CREEK...CYPRESS CREEK...MOCCASIN BRANCH...RUSH CREEK...ROBINSON
CREEK...MORGAN CREEK...MILL CREEK...LITTLE TALLAWAMPA CREEK...BIG
TALLAWAMPA CREEK...EMERY CREEK...MELLEN CREEK...ROBERTS CREEK...
TOLAND CREEK...FLAT WOODS CREEK...WEST BEND CREEK AND WAHALAK CREEK.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

TO REPORT FLASH FLOODING TO YOUR NATIONAL WEATHER SERVICE...CALL TOLL
FREE AT 1 8 7 7 6 3 3 6 7 7 2.

LAT...LON 3201 8810 3202 8809 3202 8808 3200 8807
      3200 8785 3177 8796 3177 8823 3203 8815
      3203 8811

$$
1 follow-up statement
000 
WGUS74 KMOB 170006
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
706 PM CDT WED SEP 16 2009

ALC023-025-170130-
/O.CON.KMOB.FF.W.0049.000000T0000Z-090917T0130Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARKE AL-CHOCTAW AL-
706 PM CDT WED SEP 16 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR EAST
CENTRAL CHOCTAW AND NORTHWESTERN CLARKE COUNTIES...

AT 706 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN.  THIS STORM WAS
LOCATED NEAR MORVIN...OR 15 MILES EAST OF BUTLER...MOVING NORTHEAST
AT 10 MPH.

THE THUNDERSTORM PRODUCING VERY HEAVY RAIN WILL BE NEAR...
  MORVIN...7 MILES NORTHEAST OF WOODS BLUFF AND 7 MILES NORTH OF
  OPINE BY 705 PM CDT...
  HOLTAMVILLE BY 710 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

TO REPORT FLASH FLOODING TO YOUR NATIONAL WEATHER SERVICE...CALL TOLL
FREE AT 1 8 7 7 6 3 3 6 7 7 2.

&&

LAT...LON 3201 8810 3202 8809 3202 8808 3200 8807
      3200 8785 3177 8796 3177 8823 3203 8815
      3203 8811

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 15, 8:15 PM CDTSevere Thunderstorm WarningMOBButler, Crenshaw45 min
Sep 15, 8:25 PM CDTFlash Flood WarningMOBButler, Crenshaw2 hr
Sep 15, 8:51 PM CDTSevere Thunderstorm WarningMOBCrenshaw39 min
Sep 15, 9:25 PM CDTSevere Thunderstorm WarningMOBCrenshaw35 min
Sep 16, 1:30 PM CDTAreal Flood AdvisoryMOBButler, Conecuh, Crenshaw, Monroe, Wilcox4 hr

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.