Alert archive / Alabama / Flash Flood Warnings in 2011
Flash Flood Warning 62, NWS Birmingham, AL
NWS Birmingham, AL issued this flash flood warning at Sep 20, 2011, 1:15 PM CDT for 4 counties in Alabama. It was in force for 3 hr. 5 reports 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, 1:15 PM CDT (18:15 UTC)
- Expired
- Sep 20, 2011, 4:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Blount County, AL, Jefferson County, AL, Shelby County, AL, St. Clair County, AL
The radar
The Birmingham radar (KBMX), 63 km from the middle of the area, began a volume at 18:16 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 20, 1:55 PM CDT | FLASH FLOOD | 1 Ssw Allgood, AL | WATER FLOWING ACROSS 270 TIDWELL HOLLOW ROAD. ROAD IS IMPASSABLE. |
| Sep 20, 2:00 PM CDT | FLASH FLOOD | 1 Sw Remlap, AL | WATER FLOWING OUT OF SMALL CREEK AND BEGINNING TO FLOW ONTO STATE HIGHWAY 75 AT SOUTHEASTERN ELEMENTARY SCHOOL IN REMLAP. |
| Sep 20, 2:02 PM CDT | FLASH FLOOD | 1 Nnw Remlap, AL | WATER OVER ROADWAY ON HOUSE ROAD NEAR REMLAP. |
| Sep 20, 2:02 PM CDT | FLASH FLOOD | Locust Fork, AL | WATER OVER ROADWAY ALONG SPUNKY HOLLOW ROAD IN LOCUST FORK. |
| Sep 20, 2:10 PM CDT | FLASH FLOOD | 2 Ne Remlap, AL | FLASH FLOODING ON REMLAP DRIVE BETWEEN VALLEY GROVE ROAD AND STATE HIGHWAY 75 SOUTH. |
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, 6.3 hours before the alert went out and 62 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.
709
WGUS54 KBMX 201815
FFWBMX
ALC009-073-115-117-202100-
/O.NEW.KBMX.FF.W.0062.110920T1815Z-110920T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
115 PM CDT TUE SEP 20 2011
THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EASTERN JEFFERSON COUNTY IN ALABAMA...
NORTH CENTRAL SHELBY COUNTY IN ALABAMA...
SOUTHERN BLOUNT COUNTY IN ALABAMA...
WEST CENTRAL ST. CLAIR COUNTY IN ALABAMA...
* UNTIL 400 PM CDT
* AT 114 PM CDT...NATIONAL WEATHER SERVICE INDICATED SLOW MOVING
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BIRMINGHAM...CLEVELAND...FULTONDALE...GARDENDALE...HOMEWOOD...
IRONDALE...LEEDS...MOODY...MOUNTAIN BROOK...ONEONTA...
PINSON-CLAY-CHALKVILLE...SPRINGVILLE...TRUSSVILLE...VESTAVIA
HILLS...ALLGOOD...ALTON...ARGO...B.J.C.C....BARBER MOTORSPORTS
PARK...BIRMINGHAM AIRPORT...BLUFF PARK...CAHABA HEIGHTS...CENTER
POINT...CLAY...COUNTY LINE...DALLAS...FAIRVIEW...FOWLER LAKE...
GREYSTONE AND KETONA LAKES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS SITUATION. RAINFALL FROM PERSISTENT RAINBANDS
WILL PRODUCE FLOODING IN LOW LYING AREAS AND ALONG STREETS. MANY
ROADS WILL BE CLOSED DUE TO HIGH WATER AND DRIVING IS NOT RECOMMENDED
DURING THE NEXT SEVERAL HOURS.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758.
LAT...LON 3403 8635 3355 8650 3355 8652 3340 8657
3338 8669 3340 8688 3405 8671 3406 8667
$$2 follow-up statements
139
WGUS74 KBMX 201913
FFSBMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
213 PM CDT TUE SEP 20 2011
ALC009-073-115-117-202100-
/O.CON.KBMX.FF.W.0062.000000T0000Z-110920T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BLOUNT AL-JEFFERSON AL-ST. CLAIR AL-SHELBY AL-
213 PM CDT TUE SEP 20 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTH CENTRAL SHELBY...
WEST CENTRAL ST. CLAIR...EASTERN JEFFERSON AND SOUTHERN BLOUNT
COUNTIES UNTIL 400 PM CDT...
AT 212 PM CDT...EMERGENCY MANAGEMENT REPORTED THAT FLASH FLOODING WAS
OCCURRING IN ALLGOOD IN BLOUNT COUNTY...WITH ADDITIONAL LOCALIZED
FLOODING ACROSS PORTIONS JEFFERSON COUNTY.
SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
BIRMINGHAM...CLEVELAND...FULTONDALE...GARDENDALE...HOMEWOOD...
IRONDALE...LEEDS...MOODY...MOUNTAIN BROOK...ONEONTA...
PINSON-CLAY-CHALKVILLE...SPRINGVILLE...TRUSSVILLE...VESTAVIA HILLS...
ALLGOOD...ALTON...ARGO...B.J.C.C....BARBER MOTORSPORTS PARK...
BIRMINGHAM AIRPORT...BLUFF PARK...CAHABA HEIGHTS...CENTER POINT...
CLAY...COUNTY LINE...DALLAS...FAIRVIEW...FOWLER LAKE...GREYSTONE AND
KETONA LAKES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS SITUATION. RAINFALL FROM PERSISTENT RAINBANDS
WILL PRODUCE FLOODING IN LOW LYING AREAS AND ALONG STREETS. MANY
ROADS WILL BE CLOSED DUE TO HIGH WATER AND DRIVING IS NOT RECOMMENDED
DURING THE NEXT SEVERAL HOURS.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3403 8635 3355 8650 3355 8652 3340 8657
3338 8669 3340 8688 3405 8671 3406 8667
$$873
WGUS74 KBMX 202010
FFSBMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
310 PM CDT TUE SEP 20 2011
ALC009-073-115-117-202100-
/O.CON.KBMX.FF.W.0062.000000T0000Z-110920T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BLOUNT AL-JEFFERSON AL-ST. CLAIR AL-SHELBY AL-
310 PM CDT TUE SEP 20 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTH CENTRAL SHELBY...
WEST CENTRAL ST. CLAIR...EASTERN JEFFERSON AND SOUTHERN BLOUNT
COUNTIES UNTIL 400 PM CDT...
SEVERAL REPORTS OF FLOODING HAVE BEEN NOTED ACROSS THE WARNED AREA.
RAINFALL HAS BEEN ON THE DECREASING TREND OVER THE PAST
HOUR...HOWEVER WATER MAY BE SLOW TO RECEDE IN SOME AREAS. CAUTION
SHOULD BE USED IF FLOODING IS ENCOUNTERED.
SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
BIRMINGHAM...CLEVELAND...FULTONDALE...GARDENDALE...HOMEWOOD...
IRONDALE...LEEDS...MOODY...MOUNTAIN BROOK...ONEONTA...
PINSON-CLAY-CHALKVILLE...SPRINGVILLE...TRUSSVILLE...VESTAVIA HILLS...
ALLGOOD...ALTON...ARGO...B.J.C.C....BARBER MOTORSPORTS PARK...
BIRMINGHAM AIRPORT...BLUFF PARK...CAHABA HEIGHTS...CENTER POINT...
CLAY...COUNTY LINE...DALLAS...FAIRVIEW...FOWLER LAKE...GREYSTONE AND
KETONA LAKES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3403 8635 3355 8650 3355 8652 3340 8657
3338 8669 3340 8688 3405 8671 3406 8667
$$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, 1:31 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, 2:28 PM CDT | Flash Flood Warning | BMX | Autauga, Dallas, Lowndes | 3 hr |
| 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; radar from the NEXRAD Level II archive.