Alert archive / Alabama / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 302, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Jun 18, 2011, 4:02 PM CDT for Blount County, Etowah County, St. Clair County, Alabama. It was in force for 27 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
- Jun 18, 2011, 4:02 PM CDT (21:02 UTC)
- Expired
- Jun 18, 2011, 4:29 PM CDT
- In force
- 27 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
Counties Blount County, AL, Etowah County, AL, St. Clair County, AL
The radar
The Northeast Alabama radar (KHTX), 103 km from the middle of the area, began a volume at 21:04 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, 9.0 hours before the alert went out and 105 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
- 2470 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 604 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
The text
As transmitted, in the capitals the NWS used until 2016.
711 WUUS54 KBMX 182102 SVRBMX ALC009-055-115-182145- /O.NEW.KBMX.SV.W.0302.110618T2102Z-110618T2145Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BIRMINGHAM AL 402 PM CDT SAT JUN 18 2011 THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL BLOUNT COUNTY IN ALABAMA... SOUTHWESTERN ETOWAH COUNTY IN NORTHEAST ALABAMA... NORTHEASTERN ST. CLAIR COUNTY IN ALABAMA... * UNTIL 445 PM CDT * AT 357 PM 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 ROSA...OR NEAR ONEONTA...AND MOVING EAST AT 20 MPH. * LOCATIONS IMPACTED INCLUDE... RAINBOW CITY...SUSAN MOORE...ALTOONA...WALNUT GROVE...STEELE... ATTALLA...NOCCALULA FALLS AND REECE CITY. THIS INCLUDES... INTERSTATE 59 EXIT NUMBERS 174 THROUGH 188... PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. && TO REPORT SEVERE WEATHER... CALL 1-800-856-0758. LAT...LON 3409 8601 3384 8605 3393 8658 3411 8655 TIME...MOT...LOC 2102Z 277DEG 19KT 3401 8646 $$ 17/KLAWS
2 follow-up statements
508 WWUS54 KBMX 182119 SVSBMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 419 PM CDT SAT JUN 18 2011 ALC009-055-115-182145- /O.CON.KBMX.SV.W.0302.000000T0000Z-110618T2145Z/ BLOUNT AL-ETOWAH AL-ST. CLAIR AL- 419 PM CDT SAT JUN 18 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN ST. CLAIR...SOUTHWESTERN ETOWAH AND EAST CENTRAL BLOUNT COUNTIES UNTIL 445 PM CDT... AT 416 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR ALTOONA...OR 7 MILES NORTHEAST OF ONEONTA...MOVING EAST AT 20 MPH. LOCATIONS IMPACTED INCLUDE... RAINBOW CITY...ALTOONA...WALNUT GROVE...STEELE...ATTALLA... NOCCALULA FALLS...REECE CITY...HORSE PENS FORTY...GALLANT AND HOWELTON. THIS INCLUDES... INTERSTATE 59 EXIT NUMBERS 174 THROUGH 188... TO REPORT SEVERE WEATHER...CALL 1-800-856-0758. LAT...LON 3409 8601 3384 8605 3391 8645 3410 8642 TIME...MOT...LOC 2119Z 277DEG 19KT 3400 8635 $$ 27
786 WWUS54 KBMX 182129 SVSBMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 429 PM CDT SAT JUN 18 2011 ALC009-055-115-182139- /O.CAN.KBMX.SV.W.0302.000000T0000Z-110618T2145Z/ BLOUNT AL-ETOWAH AL-ST. CLAIR AL- 429 PM CDT SAT JUN 18 2011 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ST. CLAIR... SOUTHWESTERN ETOWAH AND EAST CENTRAL BLOUNT COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. TO REPORT SEVERE WEATHER...CALL 1-800-856-0758. LAT...LON 3409 8601 3384 8605 3391 8645 3410 8642 TIME...MOT...LOC 2129Z 277DEG 19KT 3399 8629 $$ 27
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 3:24 PM CDT | Special Weather Statement | BMX | Winston | 51 min |
| Jun 18, 3:32 PM CDT | Severe Thunderstorm Warning | BMX | Cherokee | 43 min |
| Jun 18, 4:00 PM CDT | Special Weather Statement | BMX | Talladega | 30 min |
| Jun 18, 4:26 PM CDT | Special Weather Statement | BMX | Cherokee | 49 min |
| Jun 18, 4:34 PM CDT | Special Weather Statement | BMX | Calhoun | 41 min |
| Jun 18, 5:01 PM CDT | Special Weather Statement | BMX | Cleburne | 44 min |
| Jun 18, 5:40 PM CDT | Special Weather Statement | BMX | Randolph | 35 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.