Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 34, NWS Birmingham, AL

February 28, 2011Bullock County, Montgomery County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Feb 28, 2011, 5:56 PM CST for Bullock County, Montgomery County, Alabama. It was in force for 49 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: Feb 28, 2011, 5:56 PM CST (23:56 UTC)
Expired: Feb 28, 2011, 6:45 PM CST
In force: 49 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Bullock County, AL, Montgomery County, AL

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, 11.9 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.

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.

535 
WUUS54 KBMX 282356
SVRBMX
ALC011-101-010045-
/O.NEW.KBMX.SV.W.0034.110228T2356Z-110301T0045Z/

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

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BULLOCK COUNTY IN SOUTHEAST ALABAMA...
  CENTRAL MONTGOMERY COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 645 PM CST

* AT 556 PM CST...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH.  THIS STORM WAS LOCATED NEAR SPRAGUE...OR 11 MILES NORTHWEST
  OF MEADVILLE...AND MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MEADVILLE...UNION SPRINGS...MIDWAY...PINE LEVEL...SHOPTON...
  FRANKLIN FIELD...BEANS CROSSROADS AND INVERNESS.

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
SOUTHEASTERN ALABAMA.

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

LAT...LON 3202 8589 3205 8589 3207 8595 3205 8597
      3206 8600 3204 8600 3211 8638 3229 8634
      3219 8547 3203 8550 3201 8552 3201 8558
      3196 8562
TIME...MOT...LOC 2356Z 280DEG 43KT 3218 8623

$$

27

2 follow-up statements

836 
WWUS54 KBMX 010011
SVSBMX

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

ALC011-101-010045-
/O.CON.KBMX.SV.W.0034.000000T0000Z-110301T0045Z/
BULLOCK AL-MONTGOMERY AL-
611 PM CST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
MONTGOMERY AND BULLOCK COUNTIES UNTIL 645 PM CST...

AT 611 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED 6 MILES NORTH OF PINE LEVEL...OR 7
MILES NORTHEAST OF MEADVILLE...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  UNION SPRINGS...MIDWAY...SHOPTON...FRANKLIN FIELD...BEANS
  CROSSROADS...INVERNESS...ABERFOIL...PICKETT...HIGH RIDGE AND
  SIMSVILLE.

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.

&&

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

LAT...LON 3202 8589 3206 8590 3207 8595 3205 8597
      3206 8600 3204 8600 3210 8628 3227 8615
      3219 8547 3203 8550 3201 8552 3201 8558
      3196 8562
TIME...MOT...LOC 0011Z 280DEG 43KT 3215 8602

$$

27

267 
WWUS54 KBMX 010026
SVSBMX

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

ALC101-010036-
/O.CAN.KBMX.SV.W.0034.000000T0000Z-110301T0045Z/
MONTGOMERY AL-
626 PM CST MON FEB 28 2011

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

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

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

LAT...LON 3202 8589 3206 8590 3207 8596 3205 8597
      3206 8600 3204 8600 3209 8600 3224 8591
      3219 8547 3203 8550 3201 8552 3201 8558
      3196 8562
TIME...MOT...LOC 0026Z 280DEG 43KT 3212 8581

$$

ALC011-010045-
/O.CON.KBMX.SV.W.0034.000000T0000Z-110301T0045Z/
BULLOCK AL-
626 PM CST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR BULLOCK COUNTY
UNTIL 645 PM CST...

AT 626 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED NEAR FRANKLIN FIELD...OR 7 MILES WEST
OF UNION SPRINGS...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  UNION SPRINGS...MIDWAY...INVERNESS...ABERFOIL...PICKETT...
  SEDGEFIELD AND THREE NOTCH.

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.

&&

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

LAT...LON 3202 8589 3206 8590 3207 8596 3205 8597
      3206 8600 3204 8600 3209 8600 3224 8591
      3219 8547 3203 8550 3201 8552 3201 8558
      3196 8562
TIME...MOT...LOC 0026Z 280DEG 43KT 3212 8581

$$

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, 4:00 PM CST	Severe Thunderstorm Warning	BMX	Clay, Coosa, Randolph, Talladega, Tallapoosa	45 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

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; the sounding from the Mesonet's radiosonde archive.