Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 28, NWS Mobile, AL

March 2, 2012Choctaw County, Clarke County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Mar 2, 2012, 4:27 PM CST for Choctaw County, Clarke County, Alabama. It was in force for 48 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Mar 2, 2012, 4:27 PM CST (22:27 UTC)
Expired
Mar 2, 2012, 5:15 PM CST
In force
48 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Choctaw County, AL, Clarke County, AL

The radar

The Mobile radar (KMOB), 140 km from the middle of the area, began a volume at 22:30 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.

What was reported inside it

TimeReportWhereRemark
Mar 2, 4:39 PM CSTHAIL 0.75Cunningham, ALPENNY TO DIME SIZE.
Mar 2, 4:39 PM CSTHAIL 1Cunningham, ALCLARKE COUNTY EMERGENCY MANAGER REPORTED QUARTER SIZE HAIL IN CUNNINGHAM.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.5 hours before the alert went out and 182 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-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2012-03-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 544 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2012-03-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 180 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
544 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
530 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
180 m²/s²
0-3 km storm-relative helicity
204 m²/s²
Significant tornado parameter
0.6
Supercell composite
2.5

Open this sounding in Storm Lab

The text

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

661 
WUUS54 KMOB 022227
SVRMOB
ALC023-025-022315-
/O.NEW.KMOB.SV.W.0028.120302T2227Z-120302T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
427 PM CST FRI MAR 2 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CHOCTAW COUNTY IN SOUTHWEST ALABAMA...
  NORTHWESTERN CLARKE COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 515 PM CST

* AT 425 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 18 MILES SOUTH OF BUTLER...OR 5
  MILES NORTHEAST OF SILAS...AND MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ROCK SPRINGS...       SPRING HILL...        PLEASANT HILL...
  FLATWOOD...           OPINE...              SMYER...
  GLOVER...             FAILETOWN...          CUNNINGHAM...

&&

LAT...LON 3199 8806 3199 8772 3193 8768 3175 8827
      3186 8834 3200 8808
TIME...MOT...LOC 2228Z 243DEG 27KT 3184 8823

$$
1 follow-up statement
580 
WWUS54 KMOB 022251
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
451 PM CST FRI MAR 2 2012

ALC023-022301-
/O.CAN.KMOB.SV.W.0028.000000T0000Z-120302T2315Z/
CHOCTAW AL-
451 PM CST FRI MAR 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CHOCTAW COUNTY IS
CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CST SATURDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

LAT...LON 3199 8772 3193 8768 3180 8812 3190 8813
      3193 8805 3194 8807 3192 8809 3194 8811
      3197 8810 3195 8808 3199 8807
TIME...MOT...LOC 2251Z 243DEG 27KT 3192 8805

$$

ALC025-022315-
/O.CON.KMOB.SV.W.0028.000000T0000Z-120302T2315Z/
CLARKE AL-
451 PM CST FRI MAR 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CST
FOR NORTHWESTERN CLARKE COUNTY...

AT 447 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR CUNNINGHAM...OR 15 MILES SOUTHEAST OF BUTLER...MOVING
NORTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
FAILETOWN...CAMPBELL...MORVIN...OPINE...TALLAHATTA SPRINGS...BASHI...
GLOVER AND CHOCTAW CORNER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CST SATURDAY MORNING
FOR SOUTHWESTERN ALABAMA AND NORTHWEST FLORIDA AND SOUTHEAST
MISSISSIPPI.

&&

LAT...LON 3199 8772 3193 8768 3180 8812 3190 8813
      3193 8805 3194 8807 3192 8809 3194 8811
      3197 8810 3195 8808 3199 8807
TIME...MOT...LOC 2251Z 243DEG 27KT 3192 8805

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 2, 3:40 PM CSTSmall Craft AdvisoryMOB26 hr
Mar 2, 3:55 PM CSTTornado WarningMOBClarke, Wilcox50 min
Mar 2, 4:26 PM CSTTornado WarningMOBMonroe, Wilcox49 min
Mar 2, 4:43 PM CSTTornado WarningMOBCovington17 min
Mar 2, 4:57 PM CSTTornado WarningMOBClarke33 min
Mar 2, 5:03 PM CSTTornado WarningMOBBaldwin, Conecuh, Escambia, Monroe42 min
Mar 2, 5:16 PM CSTTornado WarningMOBCovington29 min
Mar 2, 5:17 PM CSTTornado WarningMOBClarke, Wilcox58 min
Mar 2, 5:35 PM CSTTornado WarningMOBChoctaw, Clarke19 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2012Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.