Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 252, NWS Birmingham, AL

May 26, 2011Calhoun County, Etowah County, St. Clair County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 26, 2011, 4:08 PM CDT for Calhoun County, Etowah County, St. Clair County, Alabama. It was in force for 52 min. 1 report 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: May 26, 2011, 4:08 PM CDT (21:08 UTC)
Expired: May 26, 2011, 5:00 PM CDT
In force: 52 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Calhoun County, AL, Etowah County, AL, St. Clair County, AL

The radar

The Northeast Alabama radar (KHTX), 102 km from the middle of the area, began a volume at 21:10 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.

What was reported inside it

Time	Report	Where	Remark
May 26, 4:15 PM CDT	HAIL 1.75	4 Nne Hokes Bluff, AL

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
May 26, 9:15 AM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.1 hours before the alert went out and 116 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: 2103 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 485 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 165 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

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

968 
WUUS54 KBMX 262108
SVRBMX
ALC015-055-115-262200-
/O.NEW.KBMX.SV.W.0252.110526T2108Z-110526T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
408 PM CDT THU MAY 26 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CALHOUN COUNTY IN EAST CENTRAL ALABAMA...
  ETOWAH COUNTY IN NORTHEAST ALABAMA...
  NORTHEASTERN ST. CLAIR COUNTY IN ALABAMA...

* UNTIL 500 PM CDT

* AT 408 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 ASHVILLE...
  OR 13 MILES SOUTHWEST OF RAINBOW CITY...AND MOVING NORTHEAST AT 30
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  MARKTON...RAINBOW CITY...GADSDEN...HOKES BLUFF...STEELE...WALNUT
  GROVE...ATTALLA AND GADSDEN MALL.

THIS INCLUDES...
INTERSTATE 59 EXIT NUMBERS 166 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 3411 8584 3412 8579 3409 8580 3400 8574
      3394 8574 3394 8577 3383 8594 3375 8626
      3388 8635 3394 8633 3394 8637 3398 8633
      3409 8631 3418 8619 3420 8610 3420 8585
TIME...MOT...LOC 2108Z 231DEG 25KT 3390 8621

$$

10/ARM

2 follow-up statements

304 
WWUS54 KBMX 262143
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
443 PM CDT THU MAY 26 2011

ALC015-115-262153-
/O.CAN.KBMX.SV.W.0252.000000T0000Z-110526T2200Z/
CALHOUN AL-ST. CLAIR AL-
443 PM CDT THU MAY 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ST. CLAIR AND
NORTHWESTERN CALHOUN COUNTIES 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 3420 8585 3411 8584 3412 8580 3409 8580
      3397 8574 3398 8619 3399 8619 3398 8633
      3399 8633 3409 8631 3418 8619 3420 8610
TIME...MOT...LOC 2143Z 204DEG 36KT 3420 8605

$$

ALC055-262200-
/O.CON.KBMX.SV.W.0252.000000T0000Z-110526T2200Z/
ETOWAH AL-
443 PM CDT THU MAY 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR ETOWAH COUNTY
UNTIL 500 PM CDT...

AT 439 PM 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
SARDIS CITY...OR 5 MILES SOUTHEAST OF BOAZ...MOVING NORTHEAST AT 40
MPH.

LOCATIONS IMPACTED INCLUDE...
  TABOR ROAD.

THIS INCLUDES...
INTERSTATE 59 EXIT NUMBERS 181 THROUGH 188...

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.

&&

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

LAT...LON 3420 8585 3411 8584 3412 8580 3409 8580
      3397 8574 3398 8619 3399 8619 3398 8633
      3399 8633 3409 8631 3418 8619 3420 8610
TIME...MOT...LOC 2143Z 204DEG 36KT 3420 8605

$$

61

718 
WWUS54 KBMX 262200
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
500 PM CDT THU MAY 26 2011

ALC055-262210-
/O.EXP.KBMX.SV.W.0252.000000T0000Z-110526T2200Z/
ETOWAH AL-
500 PM CDT THU MAY 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR ETOWAH COUNTY HAS EXPIRED...

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

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM.

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

LAT...LON 3420 8585 3411 8584 3412 8580 3409 8580
      3397 8574 3398 8619 3399 8619 3398 8633
      3399 8633 3409 8631 3418 8619 3420 8610
TIME...MOT...LOC 2200Z 204DEG 36KT 3435 8596

$$

61

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 10:56 PM CDT	Special Weather Statement	BMX	Marion	49 min
May 25, 11:25 PM CDT	Special Weather Statement	BMX	Lamar	50 min
May 25, 11:35 PM CDT	Special Weather Statement	BMX	Winston	40 min
May 26, 12:18 AM CDT	Special Weather Statement	BMX	Fayette, Walker, Winston	42 min
May 26, 12:32 AM CDT	Severe Thunderstorm Warning	BMX	Winston	28 min
May 26, 12:50 AM CDT	Severe Thunderstorm Warning	BMX	Walker	14 min
May 26, 1:22 AM CDT	Severe Thunderstorm Warning	BMX	Lamar, Pickens	38 min
May 26, 2:10 AM CDT	Special Weather Statement	BMX	Fayette, Walker, Winston	50 min
May 26, 2:40 AM CDT	Special Weather Statement	BMX	Fayette	50 min
May 26, 2:49 AM CDT	Special Weather Statement	BMX	Jefferson, Tuscaloosa	41 min
May 26, 3:20 AM CDT	Special Weather Statement	BMX	Walker	40 min
May 26, 7:43 AM CDT	Special Weather Statement	BMX	Coosa	47 min
May 26, 7:48 AM CDT	Special Weather Statement	BMX	Marion	27 min
May 26, 8:41 AM CDT	Special Weather Statement	BMX	Calhoun, Cherokee	49 min
May 26, 12:21 PM CDT	Severe Thunderstorm Warning	BMX	Marengo	24 min
May 26, 1:07 PM CDT	Severe Thunderstorm Warning	BMX	Dallas	38 min
May 26, 1:14 PM CDT	Severe Thunderstorm Warning	BMX	Lowndes, Montgomery	46 min
May 26, 1:20 PM CDT	Special Weather Statement	BMX	Etowah, St. Clair	40 min
May 26, 1:27 PM CDT	Special Weather Statement	BMX	Cherokee	48 min
May 26, 1:32 PM CDT	Severe Thunderstorm Warning	BMX	Chilton	43 min
May 26, 1:35 PM CDT	Special Weather Statement	BMX	Jefferson	40 min
May 26, 1:37 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	23 min
May 26, 1:52 PM CDT	Severe Thunderstorm Warning	BMX	Elmore, Lowndes, Montgomery	38 min
May 26, 1:56 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Etowah	49 min
May 26, 2:10 PM CDT	Severe Thunderstorm Warning	BMX	Bullock, Pike	33 min
May 26, 2:16 PM CDT	Areal Flood Advisory	BMX	Autauga, Elmore, Lowndes, Montgomery	119 min
May 26, 2:20 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Chilton, Coosa, Elmore	40 min
May 26, 2:28 PM CDT	Severe Thunderstorm Warning	BMX	Bullock, Macon, Russell	32 min
May 26, 2:31 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Cleburne, Etowah	44 min
May 26, 2:47 PM CDT	Severe Thunderstorm Warning	BMX	Macon, Montgomery	13 min
May 26, 2:51 PM CDT	Severe Thunderstorm Warning	BMX	Clay, Coosa, Talladega, Tallapoosa	24 min
May 26, 2:52 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Talladega	23 min
May 26, 2:57 PM CDT	Severe Thunderstorm Warning	BMX	Macon	18 min
May 26, 3:08 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair, Shelby	40 min
May 26, 3:15 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Cleburne, Etowah	45 min
May 26, 3:21 PM CDT	Severe Thunderstorm Warning	BMX	Clay, Tallapoosa	24 min
May 26, 3:35 PM CDT	Severe Thunderstorm Warning	BMX	Chambers	25 min
May 26, 3:36 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, St. Clair	39 min
May 26, 3:40 PM CDT	Severe Thunderstorm Warning	BMX	Russell	35 min
May 26, 3:45 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, Walker	45 min
May 26, 3:51 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens, Sumter	24 min
May 26, 3:53 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens	26 min
May 26, 3:54 PM CDT	Severe Thunderstorm Warning	BMX	Chambers, Randolph	36 min
May 26, 4:23 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	52 min
May 26, 4:51 PM CDT	Severe Thunderstorm Warning	BMX	Blount	24 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; radar from the NEXRAD Level II archive.