Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

March 22, 2012Dallas County, Alabama

NWS Birmingham, AL issued this special weather statement at Mar 22, 2012, 4:46 PM CDT for Dallas County, Alabama. It was in force for 29 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 22, 2012, 4:46 PM CDT (21:46 UTC)
Expired: Mar 22, 2012, 5:15 PM CDT
In force: 29 min
Issued by: NWS Birmingham, AL

County Dallas County, AL

The radar

The Birmingham radar (KBMX), 122 km from the middle of the area, began a volume at 21:47 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, 9.8 hours before the alert went out and 123 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 882 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 182 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 Mar 22, 3:16 PM CDT, 1 hour 30 minutes earlier.

Area forecast discussion, Mar 22, 3:16 PM CDT, 1 hour 30 minutes before

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Hazardous weather outlook, Mar 22, 1:12 PM CDT, 3 hours 34 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
112 PM CDT THU MAR 22 2012

ALZ011>015-017>050-231800-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
112 PM CDT THU MAR 22 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

SEVERE THUNDERSTORMS ARE POSSIBLE ON FRIDAY...ROUGHLY ALONG AND EAST
OF A LINE FROM JASPER TO TUSCALOOSA TO DEMOPOLIS. THE BEST CHANCE FOR
SEVERE THUNDERSTORMS WILL BE FROM NOON UNTIL 8 PM FRIDAY. THE MAIN
THREATS WILL BE DAMAGING WINDS AND LARGE HAIL.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE
NEEDED FRIDAY.

In the hours before

Special weather statement, Mar 22, 11:10 AM CDT, 5 hours 36 minutes before

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Special weather statement, Mar 22, 12:15 PM CDT, 4 hours 31 minutes before

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Special weather statement, Mar 22, 4:46 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
446 PM CDT THU MAR 22 2012

ALZ040-222215-
DALLAS AL-
446 PM CDT THU MAR 22 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN DALLAS COUNTY UNTIL 515
PM CDT...

AT 444 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR CAMDEN...MOVING NORTHEAST AT 25 MPH.

WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  FIVE POINTS...
  DALLAS LAKE...
  BELKNAP...
  ORRVILLE...
  OLD CAHABA PARK...

&&

LAT...LON 3204 8717 3209 8721 3210 8724 3211 8724
      3212 8726 3214 8726 3214 8728 3217 8731
      3238 8724 3225 8696 3204 8712
TIME...MOT...LOC 2147Z 205DEG 24KT 3203 8725

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 22, 10:14 AM CDT	Areal Flood Advisory	BMX	Sumter	3 hr
Mar 22, 11:10 AM CDT	Special Weather Statement	BMX	Marengo	65 min
Mar 22, 12:15 PM CDT	Special Weather Statement	BMX	Greene, Hale, Marengo, Perry, Pickens, Tuscaloosa	45 min
Mar 22, 1:57 PM CDT	River Flood Warning	BMX	Greene, Hale, Marengo, Pickens, Sumter	30 hr
Mar 22, 2:16 PM CDT	Areal Flood Advisory	BMX	Greene, Marengo, Sumter	3 hr
Mar 22, 4:17 PM CDT	River Flood Warning	BMX	Sumter	18 hr
Mar 22, 5:05 PM CDT	Special Weather Statement	BMX	Bullock	40 min

Nearby

Special Weather Statements in Alabama, 2012 Every special weather statement in 2012

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.