Alert archive / Alabama / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 415, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Sep 27, 2011, 7:07 AM CDT for 4 counties in Alabama. It was in force for 26 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
- Sep 27, 2011, 7:07 AM CDT (12:07 UTC)
- Expired
- Sep 27, 2011, 7:33 AM CDT
- In force
- 26 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
Counties Greene County, AL, Hale County, AL, Pickens County, AL, Tuscaloosa County, AL
The radar
The Columbus AFB radar (KGWX), 95 km from the middle of the area, began a volume at 12:09 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, 0.1 hours before the alert went out and 100 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
- 894 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 553 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
997 WUUS54 KBMX 271207 SVRBMX ALC063-065-107-125-271245- /O.NEW.KBMX.SV.W.0415.110927T1207Z-110927T1245Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 707 AM CDT TUE SEP 27 2011 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN GREENE COUNTY IN WEST CENTRAL ALABAMA... NORTHEASTERN HALE COUNTY IN WEST CENTRAL ALABAMA... SOUTHERN PICKENS COUNTY IN WEST CENTRAL ALABAMA... SOUTHWESTERN TUSCALOOSA COUNTY IN WEST CENTRAL ALABAMA... * UNTIL 745 AM CDT * AT 707 AM CDT...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BENEVOLA... OR 12 MILES SOUTHEAST OF CARROLLTON...AND MOVING EAST AT 25 MPH. * LOCATIONS IMPACTED INCLUDE... NORTHPORT...TUSCALOOSA...HOLT...JENA...KNOXVILLE...COKER...LAKE LURLEEN STATE PARK AND BRYANT DENNY STADIUM. THIS INCLUDES... INTERSTATE 20 EXIT NUMBERS 52 THROUGH 76... PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER... IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && TO REPORT SEVERE WEATHER... CALL 1-800-856-0758. LAT...LON 3320 8813 3339 8746 3296 8742 3296 8815 TIME...MOT...LOC 1207Z 258DEG 20KT 3315 8793 $$
2 follow-up statements
315 WWUS54 KBMX 271220 SVSBMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 720 AM CDT TUE SEP 27 2011 ALC063-065-107-125-271245- /O.CON.KBMX.SV.W.0415.000000T0000Z-110927T1245Z/ GREENE AL-HALE AL-PICKENS AL-TUSCALOOSA AL- 720 AM CDT TUE SEP 27 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN TUSCALOOSA...EAST CENTRAL PICKENS...NORTHEASTERN HALE AND NORTHEASTERN GREENE COUNTIES UNTIL 745 AM CDT... AT 718 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR JENA...OR 11 MILES SOUTH OF GORDO...MOVING EAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE... NORTHPORT...TUSCALOOSA...HOLT...KNOXVILLE...COKER...LAKE LURLEEN STATE PARK...BRYANT DENNY STADIUM...UNIVERSITY MALL...MCFARLAND MALL AND MOUNDVILLE. THIS INCLUDES... INTERSTATE 20 EXIT NUMBERS 52 THROUGH 76... PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS IF YOU ARE IN THE PATH OF THIS STORM. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURE'S LEADING KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && TO REPORT SEVERE WEATHER...CALL 1-800-856-0758. LAT...LON 3296 8800 3324 8799 3339 8746 3296 8742 TIME...MOT...LOC 1220Z 258DEG 20KT 3316 8785 $$
453 WWUS54 KBMX 271233 SVSBMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 733 AM CDT TUE SEP 27 2011 ALC063-065-107-125-271242- /O.CAN.KBMX.SV.W.0415.000000T0000Z-110927T1245Z/ GREENE AL-HALE AL-PICKENS AL-TUSCALOOSA AL- 733 AM CDT TUE SEP 27 2011 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN TUSCALOOSA...EAST CENTRAL PICKENS...NORTHEASTERN HALE AND NORTHEASTERN GREENE COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED ACROSS THE WARNED AREA. TO REPORT SEVERE WEATHER...CALL 1-800-856-0758. LAT...LON 3296 8800 3324 8799 3339 8746 3296 8742 TIME...MOT...LOC 1232Z 258DEG 20KT 3318 8777 $$
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 26, 10:18 PM CDT | Dense Fog Advisory | BMX | Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 25 more | 11 hr |
| Sep 27, 6:26 AM CDT | Special Weather Statement | BMX | Pickens | 49 min |
| Sep 27, 7:33 AM CDT | Special Weather Statement | BMX | Hale, Tuscaloosa | 42 min |
| Sep 27, 7:39 AM CDT | Special Weather Statement | BMX | Sumter | 36 min |
| Sep 27, 8:08 AM CDT | Special Weather Statement | BMX | Bibb, Jefferson, Perry, Shelby | 67 min |
| Sep 27, 8:25 AM CDT | Special Weather Statement | BMX | Dallas, Marengo | 65 min |
| Sep 27, 12:35 PM CDT | Special Weather Statement | BMX | Barbour | 40 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.