Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 83, NWS Mobile, AL

May 30, 2012Okaloosa County, Florida; Covington County, Escambia County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 30, 2012, 6:20 PM CDT for Okaloosa County, Florida; Covington County, Escambia County, Alabama. It was in force for 32 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
May 30, 2012, 6:20 PM CDT (23:20 UTC)
Expired
May 30, 2012, 6:52 PM CDT
In force
32 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Covington County, AL, Escambia County, AL, Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 87 km from the middle of the area, began a volume at 23:24 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.3 hours before the alert went out and 239 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, Tallahassee Rgnl, FL at 12:00Z on 2012-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 393 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, Tallahassee Rgnl, FL at 12:00Z on 2012-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 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
393 J/kg
Mixed-layer CIN
-162 J/kg
Mixed-layer LCL
913 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
-9 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.

542 
WUUS54 KMOB 302320
SVRMOB
ALC039-053-FLC091-310015-
/O.NEW.KMOB.SV.W.0083.120530T2320Z-120531T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
620 PM CDT WED MAY 30 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN OKALOOSA COUNTY IN NORTHWEST FLORIDA...
  SOUTHWESTERN COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA...
  SOUTHEASTERN ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 715 PM CDT

* AT 618 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 17 MILES WEST
  OF FLORALA...OR 10 MILES SOUTH OF FALCO...AND MOVING SOUTHWEST AT 5
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  BAKER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

&&

LAT...LON 3079 8670 3097 8679 3099 8679 3100 8681
      3103 8682 3114 8662 3098 8646
TIME...MOT...LOC 2320Z 048DEG 4KT 3102 8663

$$
1 follow-up statement
584 
WWUS54 KMOB 302352
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
652 PM CDT WED MAY 30 2012

ALC039-053-FLC091-310002-
/O.CAN.KMOB.SV.W.0083.000000T0000Z-120531T0015Z/
COVINGTON AL-ESCAMBIA AL-OKALOOSA FL-
652 PM CDT WED MAY 30 2012

...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR
NORTHWESTERN OKALOOSA...SOUTHEASTERN ESCAMBIA AND SOUTHWESTERN
COVINGTON COUNTIES...

AT 651 PM CDT...THE STORM THAT PROMPTED THE WARNING FOR NORTHWESTERN
OKALOOSA...SOUTHEASTERN ESCAMBIA AND SOUTHWESTERN COVINGTON COUNTIES
HAS WEAKENED TO BELOW SEVERE LIMITS...THUS THE SEVERE THUNDERSTORM
WARNING HAS BEEN CANCELLED.

TO REPORT SEVERE WEATHER...CALL (800) 284-9059.

LAT...LON 3079 8670 3097 8679 3099 8679 3100 8681
      3103 8682 3114 8662 3098 8646
TIME...MOT...LOC 2352Z 048DEG 4KT 3100 8666

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 7:28 PM CDTSevere Thunderstorm WarningMOBEscambia17 min
May 29, 9:49 PM CDTDense Smoke AdvisoryMOB15 hr
May 30, 1:39 PM CDTDense Smoke AdvisoryMOB18 hr
May 29, 9:32 PM CDTSpecial Marine WarningMOB88 min
May 30, 2:23 AM CDTSevere Thunderstorm WarningMOBCovington37 min
May 30, 2:12 PM CDTSpecial Marine WarningMOB93 min
May 30, 2:54 PM CDTSevere Thunderstorm WarningMOBMobile66 min
May 30, 3:00 PM CDTSevere Thunderstorm WarningMOBBaldwin60 min
May 30, 3:19 PM CDTSevere Thunderstorm WarningMOBBaldwin, Mobile56 min
May 30, 4:03 PM CDTSevere Thunderstorm WarningMOBMobile57 min
May 30, 4:12 PM CDTSevere Thunderstorm WarningMOBClarke37 min
May 30, 4:16 PM CDTSevere Thunderstorm WarningMOBMobile59 min
May 30, 4:21 PM CDTSevere Thunderstorm WarningMOBMobile54 min
May 30, 5:06 PM CDTSevere Thunderstorm WarningMOBConecuh, Monroe54 min
May 30, 5:14 PM CDTSevere Thunderstorm WarningMOBChoctaw24 min
May 30, 5:38 PM CDTSevere Thunderstorm WarningMOBClarke67 min
May 30, 5:52 PM CDTSevere Thunderstorm WarningMOBMonroe29 min
May 30, 6:47 PM CDTSevere Thunderstorm WarningMOBChoctaw46 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2012Severe Thunderstorm Warnings in Florida, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.