Alert archive / Alabama / Flash Flood Warnings in 2012
Flash Flood Warning 29, NWS Birmingham, AL
NWS Birmingham, AL issued this flash flood warning at Aug 9, 2012, 5:41 PM CDT for Shelby County, Alabama. It was in force for 3 hr. 6 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
- Aug 9, 2012, 5:41 PM CDT (22:41 UTC)
- Expired
- Aug 9, 2012, 8:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Shelby County, AL
The radar
The Birmingham radar (KBMX), 19 km from the middle of the area, began a volume at 22:42 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 |
|---|---|---|---|
| Aug 9, 5:50 PM CDT | HEAVY RAIN 0 | 5 Nne Alabaster, AL | FIVE INCHES OF WATER REPORTED FLOWING ACROSS HWY 31 NEAR BOJANGLES. |
| Aug 9, 6:00 PM CDT | FLASH FLOOD | 4 Ese Hoover, AL | WATER COVERING THE ROADWAY ON HWY 119 NEAR THE INDIAN SPRINGS TOWN HALL. DEPTH OF WATER UNKNOWN AT THIS TIME. |
| Aug 9, 6:05 PM CDT | FLASH FLOOD | 5 Ne Helena, AL | WATER REPORTED FLOWING ACROSS STATE PARK ROAD APPROXIMATELY ONE MILE SOUTH OF HWY 119. DEPTH OF WATER UNKNOWN AT THIS TIME. |
| Aug 9, 6:10 PM CDT | FLASH FLOOD | 3 E Hoover, AL | REPORT OF ROADS FLOODED IN AND AROUND THE SOUTHLAKE AREA. PUBLIC WORKS IS ENROUTE. |
| Aug 9, 6:40 PM CDT | FLASH FLOOD | 5 Nw Chelsea, AL | WATER COVERING THE ROADWAY AT THE INTERSECTION OF HWY 119 AND OAK MOUNTAIN LAKE ROAD. DEPTH OF WATER IS UNKNOWN AT THIS TIME. |
| Aug 9, 6:45 PM CDT | FLASH FLOOD | 4 Ese Hoover, AL | FLASH FLOODING REPORTED ALONG HWY 119 AT JASMINE HILL RD AND ALSO AT CAHABA OAKS TRAIL. SOME TRAFFIC LANES WERE UNPASSABLE FOR A SHORT TIME AND THE POLICE DEPT HAD TO DIVERT TRAFFIC. WATER IS NOW BEGINNING TO RECEDE AND CONDITIONS ARE IMPROVING. |
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, 10.7 hours before the alert went out and 18 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
- 1967 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 780 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
920
WGUS54 KBMX 092241
FFWBMX
ALC117-100130-
/O.NEW.KBMX.FF.W.0029.120809T2241Z-120810T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
541 PM CDT THU AUG 9 2012
THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL SHELBY COUNTY IN ALABAMA...
* UNTIL 830 PM CDT
* AT 541 PM CDT...NATIONAL WEATHER SERVICE INDICATED SLOW MOVING
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
DOPPLER RADAR ESTIMATES SHOW UP TO TWO INCHES OF RAIN HAS FALLEN
OVER THE WARNED AREA IN THE LAST HOUR...AND AN ADDITIONAL ONE TO TWO
INCHES IS POSSIBLE WITHIN THE NEXT HOUR.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CHELSEA...PELHAM...HIGHLAND LAKES...INDIAN SPRINGS VILLAGE...
MEADOWBROOK...OAK MOUNTAIN AMPITHEATER...OAK MOUNTAIN STATE PARK
AND RIVERCHASE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.
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 OR TWEET YOUR REPORT USING HASHTAG ALWX
LAT...LON 3327 8661 3325 8685 3333 8685 3334 8683
3336 8682 3337 8678 3339 8678 3341 8675
3343 8665
$$
191 follow-up statement
221
WGUS74 KBMX 100005
FFSBMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
705 PM CDT THU AUG 9 2012
ALC117-100130-
/O.CON.KBMX.FF.W.0029.000000T0000Z-120810T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SHELBY AL-
705 PM CDT THU AUG 9 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CENTRAL SHELBY COUNTY
UNTIL 830 PM CDT...
AT 702 PM CDT...LOCAL LAW ENFORCEMENT AND EMERGENCY MANAGEMENT
OFFICIALS REPORTED THAT FLASH FLOODING WAS OCCURRING IN THE PELHAM
AND INDIAN SPRINGS VILLAGE AREAS. SEVERAL ROADWAYS ARE COVERED IN
WATER...INCLUDING PORTIONS OF CAHABA VALLEY ROAD IN INDIAN SPRINGS
VILLAGE AND HWY 31 IN PELHAM. FLOOD WATERS SHOULD SLOWLY RECEDE OVER
THE NEXT COUPLE OF HOURS.
SOME LOCATIONS THAT WILL CONTINUE TO EXPERIENCE FLASH FLOODING
INCLUDE...PELHAM...HIGHLAND LAKES...INDIAN SPRINGS VILLAGE...OAK
MOUNTAIN AMPITHEATER...OAK MOUNTAIN STATE PARK AND RIVERCHASE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS
AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING
AREAS ARE ALSO SUBJECT TO FLOODING.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3327 8661 3325 8685 3333 8685 3334 8683
3336 8682 3337 8678 3339 8678 3341 8675
3343 8665
$$
19The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 7:45 PM CDT | Special Weather Statement | BMX | Walker | 30 min |
| Aug 9, 9:29 AM CDT | Special Weather Statement | BMX | Tuscaloosa | 46 min |
| Aug 9, 10:17 AM CDT | Areal Flood Advisory | BMX | Fayette, Lamar, Pickens, Tuscaloosa | 3 hr |
| Aug 9, 10:26 AM CDT | Special Weather Statement | BMX | Jefferson | 49 min |
| Aug 9, 10:36 AM CDT | Special Weather Statement | BMX | Cherokee | 39 min |
| Aug 9, 11:07 AM CDT | Special Weather Statement | BMX | Jefferson | 38 min |
| Aug 9, 11:12 AM CDT | Special Weather Statement | BMX | Clay | 48 min |
| Aug 9, 11:21 AM CDT | Areal Flood Advisory | BMX | Blount, Jefferson, St. Clair, Shelby | 114 min |
| Aug 9, 11:37 AM CDT | Severe Thunderstorm Warning | BMX | Calhoun, St. Clair, Shelby, Talladega | 38 min |
| Aug 9, 11:46 AM CDT | Areal Flood Advisory | BMX | Etowah | 119 min |
| Aug 9, 12:02 PM CDT | Special Weather Statement | BMX | Etowah | 43 min |
| Aug 9, 12:15 PM CDT | Special Weather Statement | BMX | Calhoun, Clay, Cleburne, Talladega | 45 min |
| Aug 9, 12:24 PM CDT | Areal Flood Advisory | BMX | Calhoun, Clay, Talladega | 111 min |
| Aug 9, 1:49 PM CDT | Areal Flood Advisory | BMX | Marengo, Sumter | 116 min |
| Aug 9, 3:43 PM CDT | Special Weather Statement | BMX | Dallas | 47 min |
| Aug 9, 4:33 PM CDT | Areal Flood Advisory | BMX | Elmore, Macon, Montgomery | 3 hr |
| Aug 9, 4:42 PM CDT | Areal Flood Advisory | BMX | Autauga, Lowndes | 3 hr |
| Aug 9, 5:01 PM CDT | Special Weather Statement | BMX | Lee | 44 min |
| Aug 9, 5:13 PM CDT | Areal Flood Advisory | BMX | Lee | 2 hr |
| Aug 9, 5:21 PM CDT | Areal Flood Advisory | BMX | Shelby | 114 min |
| Aug 9, 6:39 PM CDT | Special Weather Statement | BMX | Talladega | 51 min |
Nearby
Flash Flood Warnings in Alabama, 2012Every flash flood warning in 2012
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.