Alert archive / Alabama / Special Weather Statements in 2011

Special Weather Statement, NWS Birmingham, AL

October 13, 20114 counties in Alabama

NWS Birmingham, AL issued this special weather statement at Oct 13, 2011, 2:20 PM CDT for 4 counties in Alabama. It was in force for 55 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: Oct 13, 2011, 2:20 PM CDT (19:20 UTC)
Expired: Oct 13, 2011, 3:15 PM CDT
In force: 55 min
Issued by: NWS Birmingham, AL

Counties Barbour County, AL, Bullock County, AL, Pike County, AL, Russell County, AL

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.3 hours before the alert went out and 174 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: 314 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 461 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.3

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 Oct 13, 12:55 PM CDT, 1 hour 25 minutes earlier.

Area forecast discussion, Oct 13, 12:55 PM CDT, 1 hour 25 minutes before

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Hazardous weather outlook, Oct 13, 1:20 PM CDT, 1 hour before

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In the hours before

Local storm report, Oct 13, 11:52 AM CDT, 2 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1152 AM CDT THU OCT 13 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1140 AM     HAIL             MONTGOMERY              32.35N 86.28W
10/13/2011  M0.25 INCH       MONTGOMERY         AL   TRAINED SPOTTER

            PEA SIZE HAIL AT INTERSECTION OF I-85 AND EASTERN
            BOULEVARD.

&&

Special weather statement, Oct 13, 11:53 AM CDT, 2 hours 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1153 AM CDT THU OCT 13 2011

ALZ037-043-045-047-048-131800-
ELMORE AL-LEE AL-MACON AL-RUSSELL AL-TALLAPOOSA AL-
1153 AM CDT THU OCT 13 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN TALLAPOOSA...
NORTHERN RUSSELL...NORTHERN MACON...LEE AND SOUTHEASTERN ELMORE
COUNTIES UNTIL 100 PM CDT...

AT 1148 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR LIBERTY CITY...OR NEAR NOTASULGA...MOVING EAST AT
35 MPH.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  AUBURN...
  OPELIKA...
  SMITHS...
  PHENIX CITY...
  TUSKEGEE NATIONAL FOREST...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

&&

LAT...LON 3235 8499 3241 8600 3272 8574 3274 8541
      3273 8529 3275 8528 3275 8512 3269 8511
      3265 8508 3265 8509 3237 8497
TIME...MOT...LOC 1653Z 266DEG 31KT 3255 8568

Special weather statement, Oct 13, 12:44 PM CDT, 1 hour 36 minutes before

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Local storm report, Oct 13, 12:58 PM CDT, 1 hour 22 minutes before

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Special weather statement, Oct 13, 1:37 PM CDT, 43 minutes before

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Special weather statement, Oct 13, 2:20 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 13, 11:53 AM CDT	Special Weather Statement	BMX	Lee	67 min
Oct 13, 12:05 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Macon, Russell	40 min
Oct 13, 1:37 PM CDT	Special Weather Statement	BMX	Bullock, Macon	53 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.