Alert archive / Alabama / Flash Flood Warnings in 2012
Flash Flood Warning 34, NWS Huntsville, AL
NWS Huntsville, AL issued this flash flood warning at Aug 10, 2012, 5:29 PM CDT for Limestone County, Madison 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
- Aug 10, 2012, 5:29 PM CDT (22:29 UTC)
- Expired
- Aug 10, 2012, 8:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Limestone County, AL, Madison County, AL
The radar
The Northeast Alabama radar (KHTX), 68 km from the middle of the area, began a volume at 22:30 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 10, 6:05 PM CDT | FLASH FLOOD | 3 Nw Madison, AL | CARS REPORTED TO BE PARTIALLY UNDERWATER NEAR THE INTERSECTION OF BROWNS FERRY AND COUNTY LINE ROADS IN MADISON. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 10.5 hours before the alert went out and 160 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
- 1560 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 621 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
288 WGUS54 KHUN 102229 FFWHUN ALC083-089-110130- /O.NEW.KHUN.FF.W.0034.120810T2229Z-120811T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HUNTSVILLE AL 529 PM CDT FRI AUG 10 2012 THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHEASTERN LIMESTONE COUNTY IN NORTH CENTRAL ALABAMA... SOUTHWESTERN MADISON COUNTY IN NORTH CENTRAL ALABAMA... * UNTIL 830 PM CDT * AT 526 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS SOUTHEAST LIMESTONE AND SOUTHWEST MADISON COUNTY. UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING CAN BE EXPECTED AS ADDITIONAL HEAVY RAIN OCCURS. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... MADISON. RURAL AREAS IN LIMESTONE COUNTY BETWEEN HIGHWAY 72 AND INTERSTATE 65. 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. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DON'T DROWN. && LAT...LON 3462 8668 3464 8692 3480 8690 3480 8669 $$ DJN
3 follow-up statements
524 WGUS74 KHUN 102319 FFSHUN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 619 PM CDT FRI AUG 10 2012 ALC083-089-110130- /O.CON.KHUN.FF.W.0034.000000T0000Z-120811T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LIMESTONE AL-MADISON AL- 619 PM CDT FRI AUG 10 2012 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR SOUTHEASTERN LIMESTONE AND SOUTHWESTERN MADISON COUNTIES... AT 615 PM CDT...LOCAL EMERGENCY MANAGEMENT REPORTED FLASH FLOODING IN MADISON...AT THE INTERSECTION OF BROWNSFERRY ROAD AND COUNTY LINE ROAD. CARS ARE REPORTEDLY PARTIALLY UNDER WATER AT THIS INTERSECTION. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... MADISON. THE HEAVY RAIN HAS MOVED AWAY FROM MADISON...BUT RUNOFF FROM THE EXCESSIVE RAIN WILL CONTINUE TO PRODUCE FLASH FLOODING ACROSS PORTIONS OF SOUTHEAST LIMESTONE AND SOUTHWEST MADISON COUNTY... ESPECIALLY IN AND AROUND THE CITY OF MADISON. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. && LAT...LON 3461 8668 3464 8692 3479 8690 3479 8669 $$ DJN
592 WGUS74 KHUN 110052 FFSHUN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 752 PM CDT FRI AUG 10 2012 ALC083-089-110130- /O.CON.KHUN.FF.W.0034.000000T0000Z-120811T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LIMESTONE AL-MADISON AL- 752 PM CDT FRI AUG 10 2012 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR SOUTHEASTERN LIMESTONE AND SOUTHWESTERN MADISON COUNTIES... AT 750 PM CDT...LOCAL EMERGENCY MANAGEMENT AND DISPATCH CONTINUED TO REPORT FLASH FLOODING OVER PARTS OF MADISON... ESPECIALLY ALONG COUNTY LINE ROAD...JUST SOUTH OF HIGHWAY 72. TWO TO THREE INCHES OF RAIN FELL IN A VERY SHORT PERIOD OF TIME...RESULTING IN THE FLASH FLOODING. A FEW MODERATE TO HEAVY RAIN SHOWERS MAY MOVE BACK ACROSS THIS AREA THROUGH 9 PM...WITH A QUICK ADDITIONAL 1/4 TO 1/2 INCH OF RAINFALL. THIS...ALONG WITH THE EXCESSIVE RAINFALL THAT HAS ALREADY FALLEN...WILL MAINTAIN AN ELEVATED FLASH FLOOD THREAT ACROSS SOUTHEAST LIMESTONE AND SOUTHWEST MADISON COUNTIES THROUGH AT LEAST 8:30 PM CDT. 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. MOVE TO HIGHER GROUND. TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. && LAT...LON 3461 8668 3464 8692 3479 8690 3479 8669 $$ DJN
236 WGUS74 KHUN 110122 FFSHUN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 822 PM CDT FRI AUG 10 2012 ALC083-089-110132- /O.EXP.KHUN.FF.W.0034.000000T0000Z-120811T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LIMESTONE AL-MADISON AL- 822 PM CDT FRI AUG 10 2012 ...THE FLASH FLOOD WARNING FOR SOUTHEASTERN LIMESTONE AND SOUTHWESTERN MADISON COUNTIES WILL EXPIRE AT 830 PM CDT... THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. LAT...LON 3461 8668 3464 8692 3479 8690 3479 8669 $$ RSB
The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 3:11 PM CDT | Special Weather Statement | HUN | Limestone | 34 min |
| Aug 10, 3:24 PM CDT | Special Weather Statement | HUN | Jackson | 36 min |
| Aug 10, 3:59 PM CDT | Severe Thunderstorm Warning | HUN | Jackson | 31 min |
| Aug 10, 4:04 PM CDT | Special Weather Statement | HUN | Lauderdale | 41 min |
| Aug 10, 4:24 PM CDT | Special Weather Statement | HUN | Madison | 36 min |
| Aug 10, 4:39 PM CDT | Special Weather Statement | HUN | Jackson | 51 min |
| Aug 10, 4:44 PM CDT | Special Weather Statement | HUN | Lawrence | 31 min |
| Aug 10, 5:02 PM CDT | Special Weather Statement | HUN | Madison | 28 min |
| Aug 10, 5:23 PM CDT | Special Weather Statement | HUN | DeKalb | 52 min |
| Aug 10, 5:37 PM CDT | Special Weather Statement | HUN | Franklin | 53 min |
| Aug 10, 5:45 PM CDT | Special Weather Statement | HUN | Limestone | 45 min |
| Aug 10, 5:47 PM CDT | Special Weather Statement | HUN | Lawrence | 28 min |
| Aug 10, 5:58 PM CDT | Special Weather Statement | HUN | Madison | 47 min |
| Aug 10, 6:10 PM CDT | Special Weather Statement | HUN | DeKalb | 50 min |
| Aug 10, 6:13 PM CDT | Flash Flood Warning | HUN | Lawrence | 3 hr |
| Aug 10, 6:55 PM CDT | Special Weather Statement | HUN | DeKalb | 20 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.