Alert archive / Alabama / Flash Flood Warnings in 2012
Flash Flood Warning 30, NWS Huntsville, AL
NWS Huntsville, AL issued this flash flood warning at Jul 19, 2012, 7:23 PM CDT for Colbert County, Alabama. It was in force for 75 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
- Jul 19, 2012, 7:23 PM CDT (00:23 UTC)
- Expired
- Jul 19, 2012, 8:38 PM CDT
- In force
- 75 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Colbert County, AL
The radar
The Columbus AFB radar (KGWX), 112 km from the middle of the area, began a volume at 00:24 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.
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 0.4 hours before the alert went out and 177 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
- 1296 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1289 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
886
WGUS54 KHUN 200023
FFWHUN
ALC033-200230-
/O.NEW.KHUN.FF.W.0030.120720T0023Z-120720T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
723 PM CDT THU JUL 19 2012
THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN COLBERT COUNTY IN NORTHWEST ALABAMA...
* UNTIL 930 PM CDT
* AT 720 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS PORTIONS
OF EASTERN AND SOUTHEASTERN COLBERT COUNTY. RADAR ESTIMATES INDICATE
THAT 2 TO LOCALLY 3 INCHES OF RAINFALL HAS ALREADY FALLEN IN SOME
AREAS SINCE 6 PM. AN ADDITIONAL 1 TO 2 INCHES OF RAINFALL IS
POSSIBLE THROUGH 9 PM WHICH WILL CAUSE FLASH FLOODING.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LEIGHTON...WHITEOAK...SPRING VALLEY.
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.
&&
LAT...LON 3474 8746 3465 8746 3465 8748 3463 8748
3460 8751 3458 8751 3457 8752 3458 8766
3474 8768
$$2 follow-up statements
612
WGUS74 KHUN 200100
FFSHUN
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
800 PM CDT THU JUL 19 2012
ALC033-200230-
/O.CON.KHUN.FF.W.0030.000000T0000Z-120720T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COLBERT AL-
800 PM CDT THU JUL 19 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EAST CENTRAL COLBERT
COUNTY UNTIL 930 PM CDT...
AT 757 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF SLOW MOVING THUNDERSTORMS ACROSS EASTERN COLBERT COUNTY.
RADAR ESTIMATES INDICATE THAT 2 TO LOCALLY 4 INCHES OF RAIN HAVE
ALREADY FALLEN IN A NARROW CORRIDOR FROM JUST WEST OF LEIGHTON TO
WHITEOAK TO NEAR SPRING VALLEY. LOCALLY HEAVY RAINFALL WILL REMAIN
POSSIBLE IN THE SPRING VALLEY AREA THROUGH 9 PM...BUT THE RAIN HAS
BEGUN TO TAPER OFF QUICKLY IN WHITEOAK AND LEIGHTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS
AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING
AREAS ARE ALSO SUBJECT TO FLOODING.
&&
LAT...LON 3474 8751 3467 8749 3465 8749 3464 8749
3461 8751 3460 8751 3460 8753 3461 8766
3473 8768
$$058
WGUS74 KHUN 200138
FFSHUN
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
838 PM CDT THU JUL 19 2012
ALC033-200153-
/O.CAN.KHUN.FF.W.0030.000000T0000Z-120720T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COLBERT AL-
838 PM CDT THU JUL 19 2012
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHEASTERN
COLBERT COUNTY 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 3474 8751 3467 8749 3465 8749 3464 8749
3461 8751 3460 8751 3460 8753 3461 8766
3473 8768
$$The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 7:13 PM CDT | Severe Thunderstorm Warning | HUN | Colbert | 47 min |
| Jul 20, 3:54 AM CDT | Special Weather Statement | HUN | Jackson | 51 min |
| Jul 20, 4:09 AM CDT | Special Weather Statement | HUN | Limestone | 51 min |
| Jul 20, 4:22 AM CDT | Special Weather Statement | HUN | Jackson | 38 min |
| Jul 20, 4:51 AM CDT | Special Weather Statement | HUN | DeKalb | 39 min |
| Jul 20, 5:15 AM CDT | Special Weather Statement | HUN | Morgan | 45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.