Alert archive / Alabama / Special Weather Statements in 2011

Special Weather Statement, NWS Birmingham, AL

June 21, 2011Etowah County, St. Clair County, Alabama

NWS Birmingham, AL issued this special weather statement at Jun 21, 2011, 12:09 PM CDT for Etowah County, St. Clair County, Alabama. It was in force for 51 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 21, 2011, 12:09 PM CDT (17:09 UTC)
Expired: Jun 21, 2011, 1:00 PM CDT
In force: 51 min
Issued by: NWS Birmingham, AL

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

The radar

The Birmingham radar (KBMX), 85 km from the middle of the area, began a volume at 17:11 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, 5.2 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: 1519 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 1076 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -80 m²/s²
0-3 km storm-relative helicity: -76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Birmingham, AL wrote its last area forecast discussion before this special weather statement went out at Jun 21, 6:58 AM CDT, 5 hours 11 minutes earlier.

Area forecast discussion, Jun 21, 6:58 AM CDT, 5 hours 11 minutes before

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Hazardous weather outlook, Jun 21, 5:31 AM CDT, 6 hours 38 minutes before

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In the hours before

Special weather statement, Jun 21, 12:09 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1209 PM CDT TUE JUN 21 2011

ALZ018-019-026-211800-
CALHOUN AL-ETOWAH AL-ST. CLAIR AL-
1209 PM CDT TUE JUN 21 2011

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN ST. CLAIR...WESTERN
ETOWAH AND NORTHWESTERN CALHOUN COUNTIES UNTIL 100 PM CDT...

AT 1206 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM 6 MILES NORTH OF RIVERSIDE...OR 10 MILES NORTH OF PELL
CITY...MOVING NORTHEAST AT 30 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  MARKTON...
  RAINBOW CITY...
  GADSDEN...
  ASHVILLE...
  RAGLAND...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3387 8576 3367 8606 3367 8616 3370 8619
      3368 8621 3366 8617 3363 8616 3362 8617
      3361 8620 3359 8619 3359 8622 3371 8637
      3412 8614
TIME...MOT...LOC 1709Z 222DEG 26KT 3371 8621

08

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 9:50 PM CDT	Special Weather Statement	BMX	Lamar	25 min
Jun 20, 10:04 PM CDT	Special Weather Statement	BMX	Fayette	26 min
Jun 21, 1:00 PM CDT	Special Weather Statement	BMX	Etowah	30 min
Jun 21, 1:14 PM CDT	Severe Thunderstorm Warning	BMX	Lamar, Pickens	26 min
Jun 21, 1:19 PM CDT	Special Weather Statement	BMX	Calhoun	41 min
Jun 21, 1:30 PM CDT	Special Weather Statement	BMX	Greene, Pickens	45 min
Jun 21, 1:37 PM CDT	Special Weather Statement	BMX	Tallapoosa	38 min
Jun 21, 1:48 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens, Tuscaloosa	20 min
Jun 21, 2:01 PM CDT	Special Weather Statement	BMX	Calhoun	44 min
Jun 21, 2:08 PM CDT	Special Weather Statement	BMX	Blount	52 min
Jun 21, 2:19 PM CDT	Special Weather Statement	BMX	Elmore	41 min
Jun 21, 2:23 PM CDT	Special Weather Statement	BMX	Fayette, Tuscaloosa	52 min
Jun 21, 2:35 PM CDT	Special Weather Statement	BMX	Bibb, Shelby	40 min
Jun 21, 2:40 PM CDT	Special Weather Statement	BMX	Etowah	50 min
Jun 21, 3:03 PM CDT	Special Weather Statement	BMX	Blount, Jefferson	57 min
Jun 21, 3:24 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, St. Clair, Shelby	51 min
Jun 21, 3:36 PM CDT	Severe Thunderstorm Warning	BMX	St. Clair, Shelby, Talladega	39 min
Jun 21, 3:53 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Etowah, St. Clair	52 min
Jun 21, 4:06 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Etowah, St. Clair, Talladega	39 min
Jun 21, 4:43 PM CDT	Special Weather Statement	BMX	Cherokee	47 min
Jun 21, 5:14 PM CDT	Special Weather Statement	BMX	Talladega	46 min
Jun 21, 5:26 PM CDT	Severe Thunderstorm Warning	BMX	St. Clair, Shelby, Talladega	24 min
Jun 21, 6:32 PM CDT	Special Weather Statement	BMX	Etowah	43 min
Jun 21, 6:57 PM CDT	Special Weather Statement	BMX	Lowndes	48 min

Nearby

Special Weather Statements in Alabama, 2011 Every special weather statement 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.