Alert archive / Alabama / Flash Flood Warnings in 2011
Flash Flood Warning 63, NWS Birmingham, AL
NWS Birmingham, AL issued this flash flood warning at Sep 20, 2011, 2:28 PM CDT for Autauga County, Dallas County, Lowndes County, Alabama. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 20, 2011, 2:28 PM CDT (19:28 UTC)
- Expired
- Sep 20, 2011, 5:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Autauga County, AL, Dallas County, AL, Lowndes County, AL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 20, 3:30 PM CDT | FLASH FLOOD | 11 Nw Lowndesboro, AL | HENDERSON ROAD COVERED BY WATER IN SEVERAL PLACES AND IMPASSABLE BY CAR. SEVERAL HOMES ARE LOCATED ALONG THE ROAD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 7.5 hours before the alert went out and 93 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
- 42 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 505 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
308
WGUS54 KBMX 201928
FFWBMX
ALC001-047-085-202230-
/O.NEW.KBMX.FF.W.0063.110920T1928Z-110920T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
228 PM CDT TUE SEP 20 2011
THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A
* FLASH FLOOD WARNING FOR...
AUTAUGA COUNTY IN ALABAMA...
NORTHWESTERN LOWNDES COUNTY IN SOUTH CENTRAL ALABAMA...
SOUTHEASTERN DALLAS COUNTY IN SOUTH CENTRAL ALABAMA...
* UNTIL 530 PM CDT
* AT 227 PM CDT...NATIONAL WEATHER SERVICE INDICATED A LINE OF SLOW
MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED
AREA. ONE TO TWO INCHES HAS ALREADY OCCURED WITH AN ADDITIONAL ONE
TO TWO INCHES POSSIBLE OVER THE NEXT THREE HOURS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
AUTAUGA COUNTY AIRPORT...AUTAUGAVILLE...BENTON...BOOTH...
MULBERRY...TYLER...VIDA JUNCTION AND WHITE HALL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
BIRMINGHAM.
&&
TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758.
LAT...LON 3206 8710 3263 8669 3261 8641 3257 8641
3242 8651 3206 8684
$$1 follow-up statement
719
WGUS74 KBMX 202033
FFSBMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
333 PM CDT TUE SEP 20 2011
ALC001-047-085-202230-
/O.CON.KBMX.FF.W.0063.000000T0000Z-110920T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DALLAS AL-LOWNDES AL-AUTAUGA AL-
333 PM CDT TUE SEP 20 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR AUTAUGA...NORTHWESTERN
LOWNDES AND SOUTHEASTERN DALLAS COUNTIES UNTIL 530 PM CDT...
AT 331 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
RAINFALL AMOUNTS OF ONE TO TWO INCHES HAVE FALLEN OVER THE WARNED
AREA...WITH SEVERAL SMALL AREAS OF HEAVY RAIN STILL EXPECTED TO MOVE
IN OVER THE NEXT HOUR. ADDITIONAL LOCALIZED FLOODING IS STILL
POSSIBLE.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
AUTAUGA COUNTY AIRPORT...AUTAUGAVILLE...BENTON...BOOTH...MULBERRY...
TYLER...VIDA JUNCTION AND WHITE HALL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN BIRMINGHAM.
&&
LAT...LON 3206 8710 3263 8669 3261 8641 3257 8641
3242 8651 3206 8684
$$The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 9:07 PM CDT | Areal Flood Advisory | BMX | Tuscaloosa | 113 min |
| Sep 20, 9:47 AM CDT | Areal Flood Advisory | BMX | Blount, Jefferson, St. Clair, Shelby, Talladega | 3 hr |
| Sep 20, 12:16 PM CDT | Areal Flood Advisory | BMX | Blount, Etowah, Jefferson, St. Clair, Shelby | 3 hr |
| Sep 20, 1:15 PM CDT | Flash Flood Warning | BMX | Blount, Jefferson, St. Clair, Shelby | 3 hr |
| Sep 20, 1:31 PM CDT | Special Weather Statement | BMX | Autauga | 44 min |
| Sep 20, 1:47 PM CDT | Areal Flood Advisory | BMX | Autauga, Dallas, Lowndes | 3 hr |
| Sep 20, 2:01 PM CDT | Severe Thunderstorm Warning | BMX | Autauga, Lowndes | 44 min |
| Sep 20, 2:53 PM CDT | Areal Flood Advisory | BMX | Bibb, Chilton, Dallas, Perry | 3 hr |
| Sep 20, 3:16 PM CDT | Areal Flood Advisory | BMX | Autauga, Elmore, Lowndes, Montgomery | 3 hr |
| Sep 20, 3:26 PM CDT | Special Weather Statement | BMX | Elmore | 49 min |
| Sep 20, 3:46 PM CDT | Special Weather Statement | BMX | Bibb | 44 min |
| Sep 20, 3:58 PM CDT | Areal Flood Warning | BMX | Jefferson | 83 min |
| Sep 20, 4:02 PM CDT | Special Weather Statement | BMX | Dallas | 43 min |
| Sep 20, 5:33 PM CDT | Special Weather Statement | BMX | Tallapoosa | 42 min |
| Sep 20, 5:37 PM CDT | Special Weather Statement | BMX | Macon | 53 min |
| Sep 20, 5:54 PM CDT | Severe Thunderstorm Warning | BMX | Elmore, Macon, Montgomery, Tallapoosa | 38 min |
Nearby
Flash Flood Warnings in Alabama, 2011Every flash flood warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.