Alert archive / Alabama / Special Weather Statements in 2011
Special Weather Statement, NWS Birmingham, AL
NWS Birmingham, AL issued this special weather statement at Aug 20, 2011, 1:25 PM CDT for Chambers County, Alabama. It was in force for 35 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
- Aug 20, 2011, 1:25 PM CDT (18:25 UTC)
- Expired
- Aug 20, 2011, 2:00 PM CDT
- In force
- 35 min
- Issued by
- NWS Birmingham, AL
County Chambers County, AL
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.4 hours before the alert went out and 119 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.
- Mixed-layer CAPE
- 1091 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 1222 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>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 Aug 20, 11:00 AM CDT, 2 hours 25 minutes earlier.
Area forecast discussion, Aug 20, 11:00 AM CDT, 2 hours 25 minutes before
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</html>Hazardous weather outlook, Aug 20, 6:12 AM CDT, 7 hours 13 minutes before
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</html>In the hours before
Special weather statement, Aug 20, 1:25 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 125 PM CDT SAT AUG 20 2011 ALZ037-038-047-201900- CHAMBERS AL-LEE AL-TALLAPOOSA AL- 125 PM CDT SAT AUG 20 2011 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CHAMBERS...EASTERN TALLAPOOSA AND NORTHWESTERN LEE COUNTIES UNTIL 200 PM CDT... AT 121 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG THUNDERSTORM NEAR WEST CHAMBERS...OR 6 MILES EAST OF CAMP HILL... MOVING SOUTH AT 10 MPH. PEA SIZE HAIL AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE... OPELIKA... STURKIE... WAVERLY... OAK BOWERY... ROXANA... && LAT...LON 3262 8534 3260 8576 3289 8570 3293 8547 TIME...MOT...LOC 1825Z 346DEG 9KT 3282 8554 17/KLAWS
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 1:44 PM CDT | Special Weather Statement | BMX | Coosa | 31 min |
| Aug 20, 1:56 PM CDT | Special Weather Statement | BMX | Elmore | 34 min |
| Aug 20, 2:08 PM CDT | Special Weather Statement | BMX | Coosa | 37 min |
| Aug 20, 3:28 PM CDT | Areal Flood Advisory | BMX | Jefferson, Shelby | 2 hr |
| Aug 20, 3:35 PM CDT | Special Weather Statement | BMX | Shelby | 25 min |
Nearby
Special Weather Statements in Alabama, 2011Every 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.