Alert archive / Alabama / Flash Flood Warnings in 2011
Flash Flood Warning 42, NWS Birmingham, AL
NWS Birmingham, AL issued this flash flood warning at Aug 8, 2011, 8:25 PM CDT for 4 counties in Alabama. It was in force for 90 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2011, 8:25 PM CDT (01:25 UTC)
- Expired
- Aug 8, 2011, 9:55 PM CDT
- In force
- 90 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Autauga County, AL, Elmore County, AL, Lowndes County, AL, Montgomery County, AL
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 1.4 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
- 3454 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 1101 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
041 WGUS54 KBMX 090125 FFWBMX ALC001-051-085-101-090430- /O.NEW.KBMX.FF.W.0042.110809T0125Z-110809T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 825 PM CDT MON AUG 8 2011 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHERN LOWNDES COUNTY IN SOUTH CENTRAL ALABAMA... NORTHERN MONTGOMERY COUNTY IN SOUTH CENTRAL ALABAMA... SOUTHERN AUTAUGA COUNTY IN ALABAMA... SOUTHWESTERN ELMORE COUNTY IN EAST CENTRAL ALABAMA... * UNTIL 1130 PM CDT * AT 822 PM CDT...NATIONAL WEATHER SERVICE INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RAINFALL AMOUNTS OF 1 TO 3 INCHES HAS FALLEN ACROSS THE WARNED AREA SINCE 6 PM....AND ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... MILLBROOK...MONTGOMERY...PRATTVILLE...AUBURN UNIVERSITY IN MONTGOMERY...AUTAUGA COUNTY AIRPORT...AUTAUGAVILLE...BLUE RIDGE... BOB WOODRUFF LAKE...BOYLSTON...CANTELOUS...COOSADA...DANNELLY FIELD...HOPE HULL...HUNTER...LOWNDESBORO...MONTGOMERY ZOO... PINEDALE...WHITE HALL AND WOODCREST. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && TO REPORT SEVERE WEATHER... CALL 1-800-856-0758. LAT...LON 3251 8617 3228 8615 3225 8675 3247 8678 $$
1 follow-up statement
079 WGUS74 KBMX 090255 FFSBMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 955 PM CDT MON AUG 8 2011 ALC001-051-085-101-090310- /O.CAN.KBMX.FF.W.0042.000000T0000Z-110809T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ ELMORE AL-LOWNDES AL-MONTGOMERY AL-AUTAUGA AL- 955 PM CDT MON AUG 8 2011 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHERN AUTAUGA... NORTHWESTERN MONTGOMERY...NORTH CENTRAL LOWNDES AND SOUTHWESTERN ELMORE COUNTIES IS CANCELLED... EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED... PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY. LAT...LON 3251 8617 3228 8615 3225 8675 3247 8678 $$
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 7:39 PM CDT | Areal Flood Advisory | BMX | Autauga, Elmore | 111 min |
| Aug 8, 7:48 PM CDT | Special Weather Statement | BMX | Lee | 42 min |
| Aug 8, 8:13 PM CDT | Flash Flood Warning | BMX | Autauga, Elmore | 48 min |
| Aug 9, 1:49 PM CDT | Special Weather Statement | BMX | Dallas | 41 min |
| Aug 9, 2:24 PM CDT | Severe Thunderstorm Warning | BMX | Dallas, Lowndes | 39 min |
| Aug 9, 2:48 PM CDT | Special Weather Statement | BMX | Montgomery | 42 min |
| Aug 9, 3:27 PM CDT | Special Weather Statement | BMX | Marengo | 48 min |
| Aug 9, 4:15 PM CDT | Special Weather Statement | BMX | Pike | 45 min |
| Aug 9, 4:26 PM CDT | Special Weather Statement | BMX | Barbour | 49 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; the sounding from the Mesonet's radiosonde archive.