Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 313, NWS Birmingham, AL

June 22, 2011Chilton County, Coosa County, Shelby County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jun 22, 2011, 3:52 PM CDT for Chilton County, Coosa County, Shelby County, Alabama. It was in force for 38 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: Jun 22, 2011, 3:52 PM CDT (20:52 UTC)
Expired: Jun 22, 2011, 4:30 PM CDT
In force: 38 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Chilton County, AL, Coosa County, AL, Shelby County, AL

The radar

The Birmingham radar (KBMX), 39 km from the middle of the area, began a volume at 20:53 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
Jun 22, 3:57 PM CDT	TSTM WND DMG	2 Nw Maplesville, AL	A FEW TREES DOWN ON HIGHWAY 139.

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
Jun 22, 1:29 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 8.9 hours before the alert went out and 40 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: 983 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 765 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

062 
WUUS54 KBMX 222052
SVRBMX
ALC021-037-117-222130-
/O.NEW.KBMX.SV.W.0313.110622T2052Z-110622T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
352 PM CDT WED JUN 22 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHILTON COUNTY IN ALABAMA...
  NORTHWESTERN COOSA COUNTY IN EAST CENTRAL ALABAMA...
  SOUTH CENTRAL SHELBY COUNTY IN ALABAMA...

* UNTIL 430 PM CDT

* AT 352 PM CDT...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH.  THIS STORM WAS LOCATED NEAR PARNELL...OR 14 MILES NORTH OF
  VALLEY GRANDE...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CLANTON...JEMISON...MAPLESVILLE...CHILTON COUNTY MOTOR SPORTS
  PARK...THORSBY...UNION GROVE...GAP OF THE MOUNTAIN AND LAY LAKE
  DAM.

THIS INCLUDES...
INTERSTATE 65 EXIT NUMBERS 208 THROUGH 219...

WINDS OF 60 TO 70 MPH WILL BREAK LARGE TREE LIMBS AND CAUSE SOME
DAMAGE...ESPECIALLY TO SMALLER STRUCTURES.

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 3275 8702 3277 8701 3284 8693 3284 8688
      3289 8688 3316 8656 3291 8637 3266 8692
      3267 8694
TIME...MOT...LOC 2052Z 231DEG 36KT 3275 8692

$$

10/ARM

1 follow-up statement

349 
WWUS54 KBMX 222111
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
411 PM CDT WED JUN 22 2011

ALC021-037-117-222130-
/O.CON.KBMX.SV.W.0313.000000T0000Z-110622T2130Z/
CHILTON AL-COOSA AL-SHELBY AL-
411 PM CDT WED JUN 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
SHELBY...NORTHWESTERN COOSA AND CHILTON COUNTIES UNTIL 430 PM CDT...

AT 411 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 CHILTON COUNTY MOTOR SPORTS 
PARK...OR 9 MILES SOUTH OF JEMISON...MOVING NORTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  CLANTON...JEMISON...THORSBY...UNION GROVE...GAP OF THE MOUNTAIN...
  LAY LAKE DAM...LOMAX...I 65 REST AREA...WAXAHATCHEE AT LAY LAKE AND
  AL 145 AND CR 46.

THIS INCLUDES...
INTERSTATE 65 EXIT NUMBERS 208 THROUGH 219...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

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

LAT...LON 3284 8688 3289 8688 3316 8656 3291 8637
      3273 8677
TIME...MOT...LOC 2111Z 231DEG 36KT 3287 8674

$$

10/ARM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 7:05 PM CDT	Severe Thunderstorm Warning	BMX	Lowndes, Montgomery	40 min
Jun 21, 7:44 PM CDT	Special Weather Statement	BMX	Autauga	46 min
Jun 21, 8:15 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Elmore, Lowndes, Montgomery	20 min
Jun 21, 8:35 PM CDT	Special Weather Statement	BMX	Elmore	40 min
Jun 21, 10:21 PM CDT	Special Weather Statement	BMX	Macon	39 min
Jun 22, 9:24 AM CDT	Special Weather Statement	BMX	Winston	51 min
Jun 22, 1:35 PM CDT	Special Weather Statement	BMX	Calhoun	40 min
Jun 22, 1:37 PM CDT	Special Weather Statement	BMX	Greene, Marengo, Sumter	53 min
Jun 22, 1:37 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Cleburne, Etowah	38 min
Jun 22, 1:42 PM CDT	Special Weather Statement	BMX	Lamar, Marion	63 min
Jun 22, 2:22 PM CDT	Special Weather Statement	BMX	Fayette, Marion, Walker, Winston	38 min
Jun 22, 2:25 PM CDT	Special Weather Statement	BMX	Dallas, Greene, Hale, Perry	50 min
Jun 22, 3:05 PM CDT	Special Weather Statement	BMX	Walker, Winston	55 min
Jun 22, 3:18 PM CDT	Special Weather Statement	BMX	Bibb, Chilton, Dallas, Tuscaloosa	57 min
Jun 22, 4:07 PM CDT	Special Weather Statement	BMX	Blount, Etowah, Jefferson, St. Clair, Shelby	53 min
Jun 22, 4:09 PM CDT	Special Weather Statement	BMX	Macon	66 min
Jun 22, 4:12 PM CDT	Special Weather Statement	BMX	Coosa	63 min
Jun 22, 4:25 PM CDT	Severe Thunderstorm Warning	BMX	Shelby, Talladega	50 min
Jun 22, 4:57 PM CDT	Special Weather Statement	BMX	Calhoun, Clay, St. Clair, Shelby, Talladega	48 min
Jun 22, 5:01 PM CDT	Special Weather Statement	BMX	Lowndes, Montgomery	44 min
Jun 22, 5:22 PM CDT	Special Weather Statement	BMX	Chambers, Randolph	38 min
Jun 22, 5:35 PM CDT	Special Weather Statement	BMX	Cherokee	55 min
Jun 22, 5:37 PM CDT	Special Weather Statement	BMX	Cleburne	53 min
Jun 22, 5:41 PM CDT	Areal Flood Advisory	BMX	Montgomery	3 hr
Jun 22, 5:44 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun	31 min
Jun 22, 5:58 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cleburne	47 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.