Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 108, NWS Mobile, AL

July 3, 2012Clarke County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 3, 2012, 1:58 PM CDT for Clarke County, Alabama. It was in force for 32 min. 4 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
Jul 3, 2012, 1:58 PM CDT (18:58 UTC)
Expired
Jul 3, 2012, 2:30 PM CDT
In force
32 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Clarke County, AL

The radar

The Mobile radar (KMOB), 97 km from the middle of the area, began a volume at 18:58 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
Jul 3, 2:03 PM CDTTSTM WND DMGJackson, ALTWO LARGE TREES DOWN IN JACKSON AREA.
Jul 3, 2:05 PM CDTTSTM WND DMGJackson, ALTREES AND POWERLINES DOWN IN JACKSON, ALABAMA AT THE 100 BLOCK OF DOGWOOD AND 124 BLOCK OF HAYESWOOD.
Jul 3, 2:15 PM CDTTSTM WND DMGJackson, ALTREES AND POWERLINES DOWN AT COLLEGE AND STATE STREETS. TREES DOWN ON FORREST AVENUE. TREES BLOCKING ROAD AND ON A STRUCTURE AT WEST CLINTON AND NORTH PORTIS STREETS.
Jul 3, 2:15 PM CDTHAIL 0.88Jackson, ALNICKEL SIZE HAIL REPORTED IN JACKSON, ALABAMA.

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, 7.0 hours before the alert went out and 213 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 2012-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1650 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2012-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.1939Sfc1 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
1650 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1329 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
8 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.

483 
WUUS54 KMOB 031858
SVRMOB
ALC025-031945-
/O.NEW.KMOB.SV.W.0108.120703T1858Z-120703T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
158 PM CDT TUE JUL 3 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

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

* UNTIL 245 PM CDT

* AT 154 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING
  WINDS OVER 60 MPH WAS LOCATED 4 MILES NORTHEAST OF JACKSON...OR 8
  MILES EAST OF LEROY...AND MOVING SOUTHWEST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  JACKSON...
  ROCKVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. PREPARE FOR DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3136 8781 3142 8788 3152 8792 3166 8787
      3156 8769
TIME...MOT...LOC 1858Z 057DEG 8KT 3154 8785

$$
1 follow-up statement
694 
WWUS54 KMOB 031930
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
230 PM CDT TUE JUL 3 2012

ALC025-031938-
/O.CAN.KMOB.SV.W.0108.000000T0000Z-120703T1945Z/
CLARKE AL-
230 PM CDT TUE JUL 3 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR CENTRAL
CLARKE COUNTY...

AT 226 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR CENTRAL
CLARKE COUNTY HAD WEAKENED TO BELOW SEVERE LIMITS...THUS THE SEVERE
THUNDERSTORM WARNING HAS BEEN CANCELLED.

AT 205 PM CDT...CLARKE COUNTY EMERGENCY MANAGEMENT REPORTED TREES 
AND POWER LINES DOWN IN JACKSON. NICKEL SIZED HAIL WAS ALSO REPORTED 
AT 215 PM CDT.  

LAT...LON 3136 8781 3142 8788 3152 8792 3166 8787
      3156 8769
TIME...MOT...LOC 1928Z 057DEG 8KT 3150 8792

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 2:47 PM CDTSevere Thunderstorm WarningMOBConecuh, Escambia, Monroe32 min
Jul 3, 2:53 PM CDTSevere Thunderstorm WarningMOBMobile25 min
Jul 3, 3:14 PM CDTSevere Thunderstorm WarningMOBBaldwin, Escambia61 min
Jul 3, 3:31 PM CDTSevere Thunderstorm WarningMOBMobile, Washington31 min
Jul 3, 3:43 PM CDTSevere Thunderstorm WarningMOBBaldwin, Mobile36 min
Jul 3, 4:01 PM CDTSpecial Marine WarningMOB89 min
Jul 3, 4:25 PM CDTSevere Thunderstorm WarningMOBBaldwin23 min
Jul 3, 4:43 PM CDTSevere Thunderstorm WarningMOBCovington, Crenshaw62 min
Jul 3, 5:14 PM CDTSevere Thunderstorm WarningMOBButler, Crenshaw49 min
Jul 3, 6:27 PM CDTSevere Thunderstorm WarningMOBButler, Crenshaw29 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.