Alert archive / Alabama / Special Weather Statements in 2011

Special Weather Statement, NWS Birmingham, AL

March 27, 2011Cherokee County, Etowah County, Alabama

NWS Birmingham, AL issued this special weather statement at Mar 27, 2011, 4:41 AM CDT for Cherokee County, Etowah 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: Mar 27, 2011, 4:41 AM CDT (09:41 UTC)
Expired: Mar 27, 2011, 5:30 AM CDT
In force: 49 min
Issued by: NWS Birmingham, AL

Counties Cherokee County, AL, Etowah County, AL

The radar

The Atlanta radar (KFFC), 116 km from the middle of the area, began a volume at 09:43 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 9.7 hours before the alert went out and 121 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: 120 J/kg
Mixed-layer CIN: -166 J/kg
Mixed-layer LCL: 635 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 343 m²/s²
0-3 km storm-relative helicity: 404 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.7

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 Mar 27, 4:16 AM CDT, 25 minutes earlier.

Area forecast discussion, Mar 27, 4:16 AM CDT, 25 minutes before

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Hazardous weather outlook, Mar 27, 4:00 AM CDT, 41 minutes before

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In the hours before

Local storm report, Mar 27, 12:20 AM CDT, 4 hours 21 minutes before

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Special weather statement, Mar 27, 12:46 AM CDT, 3 hours 55 minutes before

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Special weather statement, Mar 27, 12:53 AM CDT, 3 hours 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1253 AM CDT SUN MAR 27 2011

ALZ028-029-037-038-270700-
CHAMBERS AL-CLAY AL-RANDOLPH AL-TALLAPOOSA AL-
1253 AM CDT SUN MAR 27 2011

...SIGNIFICANT WEATHER ADVISORY FOR RANDOLPH...SOUTHERN CLAY...
CHAMBERS AND NORTHEASTERN TALLAPOOSA COUNTIES UNTIL 200 AM CDT...

AT 1248 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES SOUTHEAST OF
MORRISON CROSS ROADS TO 6 MILES SOUTHWEST OF ASHLAND...AND MOVING
SOUTHEAST AT 30 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THESE STORMS.

LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  ROANOKE...
  STROUD...
  LAFAYETTE...
  MALONE...
  GOLDVILLE...

THESE STORMS MAY INTENSIFY....AND A TORNADO WATCH IS IN EFFECT FOR
THIS AREA. 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 3282 8545 3320 8605 3346 8534 3341 8528
      3292 8519
TIME...MOT...LOC 0553Z 307DEG 24KT 3336 8535 3318 8586

27

Special weather statement, Mar 27, 2:24 AM CDT, 2 hours 17 minutes before

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Special weather statement, Mar 27, 4:00 AM CDT, 41 minutes before

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Special weather statement, Mar 27, 4:41 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
441 AM CDT SUN MAR 27 2011

ALZ018>021-271030-
CALHOUN AL-CHEROKEE AL-CLEBURNE AL-ETOWAH AL-
441 AM CDT SUN MAR 27 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN CHEROKEE...SOUTHEASTERN
ETOWAH...NORTHEASTERN CALHOUN AND NORTHERN CLEBURNE COUNTIES UNTIL
530 AM CDT...

AT 437 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR ATTALLA...OR NEAR GADSDEN...MOVING EAST AT 45 MPH.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM.  ALSO...THIS STORM COULD INTENSIFY IN THE NEXT 15 OR 20
MINUTES TO REACH SEVERE CRITERIA.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  GADSDEN...
  HOKES BLUFF...
  PIEDMONT...
  GADSDEN MALL...
  ANDERSON...

&&

LAT...LON 3378 8537 3393 8615 3411 8613 3408 8541
      3379 8535
TIME...MOT...LOC 0941Z 276DEG 41KT 3401 8603

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 26, 7:12 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cleburne	37 min
Mar 26, 7:19 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Walker	41 min
Mar 26, 7:32 PM CDT	Severe Thunderstorm Warning	BMX	Walker, Winston	28 min
Mar 26, 7:39 PM CDT	Tornado Warning	BMX	Walker	36 min
Mar 26, 8:05 PM CDT	Tornado Warning	BMX	Jefferson, Walker	55 min
Mar 26, 8:21 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	24 min
Mar 26, 8:28 PM CDT	Severe Thunderstorm Warning	BMX	Marion, Winston	62 min
Mar 26, 8:30 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee, Etowah	60 min
Mar 26, 8:58 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Calhoun, Jefferson, St. Clair, Talladega	25 min
Mar 26, 9:13 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Cleburne, Etowah	47 min
Mar 26, 9:16 PM CDT	Severe Thunderstorm Warning	BMX	Marion, Winston	59 min
Mar 26, 9:44 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Marion, Walker, Winston	46 min
Mar 26, 10:12 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Clay, Cleburne, Randolph, Talladega	48 min
Mar 26, 10:16 PM CDT	Areal Flood Advisory	BMX	Calhoun, Cleburne, Jefferson, St. Clair, Shelby, Talladega	3 hr
Mar 26, 10:27 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, Walker	63 min
Mar 26, 10:27 PM CDT	Tornado Warning	BMX	Clay, St. Clair, Talladega	15 min
Mar 26, 10:30 PM CDT	Severe Thunderstorm Warning	BMX	Clay, Jefferson, St. Clair, Shelby, Talladega	45 min
Mar 26, 10:34 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Tuscaloosa	56 min
Mar 26, 10:45 PM CDT	Severe Thunderstorm Warning	BMX	Clay, Cleburne, Randolph, St. Clair, Talladega	45 min
Mar 26, 11:09 PM CDT	Severe Thunderstorm Warning	BMX	Clay, Talladega	36 min
Mar 26, 11:19 PM CDT	Severe Thunderstorm Warning	BMX	Clay, Randolph	41 min
Mar 26, 11:28 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Tuscaloosa, Walker	16 min
Mar 27, 12:32 AM CDT	Severe Thunderstorm Warning	BMX	Randolph	15 min
Mar 27, 12:46 AM CDT	Special Weather Statement	BMX	Clay	44 min
Mar 27, 12:53 AM CDT	Special Weather Statement	BMX	Chambers, Randolph	67 min
Mar 27, 1:06 AM CDT	Tornado Warning	BMX	Chambers	17 min
Mar 27, 1:08 AM CDT	Tornado Warning	BMX	Chambers, Clay, Randolph, Tallapoosa	52 min
Mar 27, 1:12 AM CDT	Tornado Warning	BMX	Chambers, Tallapoosa	48 min
Mar 27, 1:52 AM CDT	Tornado Warning	BMX	Chambers	22 min
Mar 27, 1:53 AM CDT	Tornado Warning	BMX	Chambers, Tallapoosa	13 min
Mar 27, 2:24 AM CDT	Special Weather Statement	BMX	Winston	51 min
Mar 27, 4:00 AM CDT	Special Weather Statement	BMX	Cherokee	45 min
Mar 27, 6:16 AM CDT	Special Weather Statement	BMX	Greene	44 min
Mar 27, 6:26 AM CDT	Severe Thunderstorm Warning	BMX	Greene, Hale, Tuscaloosa	49 min
Mar 27, 7:01 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Hale, Tuscaloosa	44 min
Mar 27, 7:11 AM CDT	Severe Thunderstorm Warning	BMX	Greene, Sumter	49 min
Mar 27, 7:42 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Coosa	48 min
Mar 27, 7:55 AM CDT	Special Weather Statement	BMX	Greene, Hale	50 min
Mar 27, 7:58 AM CDT	Special Weather Statement	BMX	Shelby	47 min
Mar 27, 8:32 AM CDT	Special Weather Statement	BMX	Coosa	43 min
Mar 27, 9:45 AM CDT	Special Weather Statement	BMX	Chilton	45 min
Mar 27, 10:02 AM CDT	Severe Thunderstorm Warning	BMX	Autauga, Chilton, Coosa, Elmore	28 min
Mar 27, 10:27 AM CDT	Special Weather Statement	BMX	Coosa	33 min
Mar 27, 10:40 AM CDT	Special Weather Statement	BMX	Chilton	50 min
Mar 27, 11:02 AM CDT	Special Weather Statement	BMX	Tallapoosa	43 min
Mar 27, 11:37 AM CDT	Special Weather Statement	BMX	Chambers	23 min
Mar 27, 11:41 AM CDT	Special Weather Statement	BMX	Elmore	49 min
Mar 27, 12:05 PM CDT	Special Weather Statement	BMX	Russell	40 min
Mar 27, 12:12 PM CDT	Severe Thunderstorm Warning	BMX	Russell	48 min
Mar 27, 1:29 PM CDT	Severe Thunderstorm Warning	BMX	Barbour	31 min
Mar 27, 6:13 PM CDT	Special Weather Statement	BMX	Barbour	47 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.