Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 28, NWS Birmingham, AL

February 28, 20115 counties in Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Feb 28, 2011, 4:00 PM CST for 5 counties in Alabama. It was in force for 45 min. 3 reports 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: Feb 28, 2011, 4:00 PM CST (22:00 UTC)
Expired: Feb 28, 2011, 4:45 PM CST
In force: 45 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Clay County, AL, Coosa County, AL, Randolph County, AL, Talladega County, AL, Tallapoosa County, AL

What was reported inside it

Time	Report	Where	Remark
Feb 28, 4:22 PM CST	TSTM WND DMG	6 Nnw Lineville, AL	TREES WERE BLOWN DOWN IN THE SHINBONE AREA.
Feb 28, 4:22 PM CST	TSTM WND DMG	Hollins, AL	TREES WERE BLOWN DOWN.
Feb 28, 4:30 PM CST	TSTM WND DMG	W Ashland, AL	TREES DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 28, 12:29 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.0 hours before the alert went out and 85 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 652 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 498 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 425 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

806 
WUUS54 KBMX 282200
SVRBMX
ALC027-037-111-121-123-282245-
/O.NEW.KBMX.SV.W.0028.110228T2200Z-110228T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
400 PM CST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAY COUNTY IN EAST CENTRAL ALABAMA...
  NORTHERN COOSA COUNTY IN EAST CENTRAL ALABAMA...
  RANDOLPH COUNTY IN EAST CENTRAL ALABAMA...
  SOUTHERN TALLADEGA COUNTY IN EAST CENTRAL ALABAMA...
  NORTHERN TALLAPOOSA COUNTY IN EAST CENTRAL ALABAMA...

* UNTIL 445 PM CST

* AT 400 PM CST...THE NATIONAL WEATHER SERVICE INDICATED A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  TALLADEGA TO 5 MILES NORTHWEST OF BLUE SPRINGS...AND MOVING EAST AT
  55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  TALLADEGA SPRINGS...SYLACAUGA...WEOGUFKA...STEWARTVILLE...
  ASHLAND...GOODWATER...LINEVILLE AND WEDOWEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CST MONDAY EVENING FOR
ALABAMA.

TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758.

LAT...LON 3311 8556 3311 8559 3308 8559 3298 8571
      3301 8653 3310 8651 3313 8646 3319 8650
      3321 8649 3351 8606 3350 8584 3347 8588
      3347 8580 3350 8576 3351 8533 3349 8530
      3336 8528
TIME...MOT...LOC 2200Z 270DEG 50KT 3346 8601 3310 8650

$$

27

2 follow-up statements

873 
WWUS54 KBMX 282215
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
415 PM CST MON FEB 28 2011

ALC027-037-111-121-123-282245-
/O.CON.KBMX.SV.W.0028.000000T0000Z-110228T2245Z/
COOSA AL-TALLAPOOSA AL-CLAY AL-RANDOLPH AL-TALLADEGA AL-
415 PM CST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
TALLADEGA...RANDOLPH...CLAY...NORTHERN TALLAPOOSA AND NORTHERN COOSA
COUNTIES UNTIL 445 PM CST...

AT 415 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM MOUNT CHEAHA TO STEWARTVILLE...MOVING EAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  ASHLAND...LINEVILLE...GOODWATER...WEDOWEE...HANOVER...PARKDALE...
  HATCHET...BARFIELD...FOSTERS CROSS ROADS AND MORRISON CROSS ROADS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3311 8556 3311 8559 3308 8560 3298 8571
      3301 8653 3349 8595 3350 8586 3348 8589
      3347 8580 3350 8576 3350 8535 3351 8534
      3349 8530 3336 8528
TIME...MOT...LOC 2215Z 270DEG 50KT 3345 8576 3310 8625

$$

27

787 
WWUS54 KBMX 282230
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
430 PM CST MON FEB 28 2011

ALC121-282239-
/O.CAN.KBMX.SV.W.0028.000000T0000Z-110228T2245Z/
TALLADEGA AL-
430 PM CST MON FEB 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN TALLADEGA COUNTY
IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE 
WARNED AREA.

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3311 8556 3311 8559 3308 8560 3298 8571
      3301 8631 3311 8619 3311 8617 3313 8618
      3350 8576 3351 8534 3349 8530 3336 8528
TIME...MOT...LOC 2229Z 270DEG 50KT 3344 8553 3310 8602

$$

ALC027-037-111-123-282245-
/O.CON.KBMX.SV.W.0028.000000T0000Z-110228T2245Z/
COOSA AL-TALLAPOOSA AL-CLAY AL-RANDOLPH AL-
430 PM CST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR RANDOLPH...
CLAY...NORTHERN TALLAPOOSA AND NORTHEASTERN COOSA COUNTIES UNTIL 445
PM CST...

AT 429 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM FOSTERS CROSS ROADS TO PARKDALE...MOVING EAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  WEDOWEE...MORRISON CROSS ROADS...GOLDVILLE...NEW SITE...MALONE...
  CORINTH...WADLEY...HACKNEYVILLE...OFELIA AND CRAGFORD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3311 8556 3311 8559 3308 8560 3298 8571
      3301 8631 3311 8619 3311 8617 3313 8618
      3350 8576 3351 8534 3349 8530 3336 8528
TIME...MOT...LOC 2229Z 270DEG 50KT 3344 8553 3310 8602

$$

27

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 28, 1:53 PM CST	Special Weather Statement	BMX	Marshall	37 min
Feb 28, 2:11 PM CST	Severe Thunderstorm Warning	BMX	Cherokee	34 min
Feb 28, 2:19 PM CST	Special Weather Statement	BMX	Jefferson, Tuscaloosa	41 min
Feb 28, 2:21 PM CST	Severe Thunderstorm Warning	BMX	Cherokee, Etowah	24 min
Feb 28, 2:32 PM CST	Severe Thunderstorm Warning	BMX	Jefferson, Tuscaloosa	43 min
Feb 28, 2:44 PM CST	Severe Thunderstorm Warning	BMX	Cherokee	19 min
Feb 28, 2:58 PM CST	Tornado Warning	BMX	Barbour, Bullock, Pike	15 min
Feb 28, 2:59 PM CST	Severe Thunderstorm Warning	BMX	Bibb, Shelby	61 min
Feb 28, 3:09 PM CST	Severe Thunderstorm Warning	BMX	Calhoun, St. Clair, Talladega	51 min
Feb 28, 3:15 PM CST	Special Weather Statement	BMX	Cherokee	15 min
Feb 28, 3:39 PM CST	Tornado Warning	BMX	Shelby, Talladega	36 min
Feb 28, 3:53 PM CST	Severe Thunderstorm Warning	BMX	Cleburne	37 min
Feb 28, 4:16 PM CST	Severe Thunderstorm Warning	BMX	Autauga, Chilton, Dallas	44 min
Feb 28, 4:22 PM CST	Severe Thunderstorm Warning	BMX	Autauga, Dallas, Perry	38 min
Feb 28, 4:43 PM CST	Severe Thunderstorm Warning	BMX	Clay, Randolph	17 min
Feb 28, 4:47 PM CST	Severe Thunderstorm Warning	BMX	Autauga, Dallas, Lowndes	43 min
Feb 28, 5:11 PM CST	Special Weather Statement	BMX	Chambers	49 min
Feb 28, 5:15 PM CST	Severe Thunderstorm Warning	BMX	Dallas, Lowndes, Montgomery	45 min
Feb 28, 5:29 PM CST	Tornado Warning	BMX	Chambers	23 min
Feb 28, 5:56 PM CST	Severe Thunderstorm Warning	BMX	Bullock, Montgomery	49 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2011 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.