Alert archive / Alabama / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 252, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Jul 12, 2011, 5:09 PM CDT for Limestone County, Morgan County, Alabama. It was in force for 21 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 12, 2011, 5:09 PM CDT (22:09 UTC)
- Expired
- Jul 12, 2011, 5:30 PM CDT
- In force
- 21 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
Counties Limestone County, AL, Morgan County, AL
The radar
The Northeast Alabama radar (KHTX), 91 km from the middle of the area, began a volume at 22:10 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 12:00Z, 10.2 hours before the alert went out and 151 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
- 2263 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 767 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
212
WUUS54 KHUN 122209
SVRHUN
ALC083-103-122300-
/O.NEW.KHUN.SV.W.0252.110712T2209Z-110712T2300Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
509 PM CDT TUE JUL 12 2011
THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN LIMESTONE COUNTY IN NORTH CENTRAL ALABAMA...
NORTHWESTERN MORGAN COUNTY IN NORTH CENTRAL ALABAMA...
* UNTIL 600 PM CDT
* AT 509 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED NEAR MOORESVILLE...OR ABOUT NEAR
DECATUR...AND MOVING SOUTHWEST AT 15 MPH.
* LOCATIONS IMPACTED INCLUDE...
PRICEVILLE...TRINITY...
FLINT CITY...
BASHAM...
HARTSELLE...
NEEL...LEESDALE...
LAT...LON 3440 8711 3460 8711 3476 8706 3463 8679
3456 8679 3449 8681 3439 8686
TIME...MOT...LOC 2209Z 028DEG 12KT 3458 8691
$$1 follow-up statement
904
WWUS54 KHUN 122230
SVSHUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
530 PM CDT TUE JUL 12 2011
ALC083-103-122239-
/O.CAN.KHUN.SV.W.0252.000000T0000Z-110712T2300Z/
LIMESTONE AL-MORGAN AL-
530 PM CDT TUE JUL 12 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MORGAN AND
SOUTHEASTERN LIMESTONE COUNTIES IS CANCELED...
WEATHER SERVICE DOPPLER RADAR INDICATES THE THUNDERSTORM THAT
PROMPTED THE WARNING HAS WEAKENED AND IS NO LONGER SEVERE. THEREFORE
THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELED.
HEAVY RAIN...SMALL HAIL...GUSTY WINDS...AND FREQUENT LIGHTNING ARE
STILL POSSIBLE FROM THIS THUNDERSTORM. STAY INDOORS UNTIL THE STORM
HAS PASSED.
LAT...LON 3440 8711 3460 8711 3476 8706 3463 8679
3456 8679 3449 8681 3439 8686
TIME...MOT...LOC 2229Z 028DEG 12KT 3452 8695
$$The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 4:48 AM CDT | Heat Advisory | HUN | Colbert, Cullman, Franklin, Lauderdale, Lawrence, Limestone and 2 more | 38 hr |
| Jul 12, 1:43 PM CDT | Severe Thunderstorm Warning | HUN | Jackson | 32 min |
| Jul 12, 1:53 PM CDT | Special Weather Statement | HUN | DeKalb | 37 min |
| Jul 12, 2:03 PM CDT | Severe Thunderstorm Warning | HUN | DeKalb | 27 min |
| Jul 12, 2:11 PM CDT | Flash Flood Warning | HUN | Jackson | 90 min |
| Jul 12, 2:36 PM CDT | Flash Flood Warning | HUN | DeKalb | 64 min |
| Jul 12, 2:38 PM CDT | Special Weather Statement | HUN | Madison | 67 min |
| Jul 12, 3:06 PM CDT | Severe Thunderstorm Warning | HUN | Madison | 28 min |
| Jul 12, 3:29 PM CDT | Severe Thunderstorm Warning | HUN | Jackson | 31 min |
| Jul 12, 3:50 PM CDT | Special Weather Statement | HUN | Marshall | 25 min |
| Jul 12, 4:05 PM CDT | Special Weather Statement | HUN | Madison | 40 min |
| Jul 12, 4:35 PM CDT | Special Weather Statement | HUN | Limestone | 40 min |
| Jul 12, 4:39 PM CDT | Special Weather Statement | HUN | Cullman, Morgan | 36 min |
| Jul 12, 4:42 PM CDT | Severe Thunderstorm Warning | HUN | Limestone | 33 min |
| Jul 12, 5:13 PM CDT | Special Weather Statement | HUN | Cullman | 47 min |
| Jul 12, 6:00 PM CDT | Special Weather Statement | HUN | Cullman | 30 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2011Every severe thunderstorm 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; radar from the NEXRAD Level II archive.