Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 156, NWS Mobile, AL

July 30, 2012Escambia County, Alabama; Santa Rosa County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Jul 30, 2012, 5:21 PM CDT for Escambia County, Alabama; Santa Rosa County, Florida. It was in force for 54 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
Jul 30, 2012, 5:21 PM CDT (22:21 UTC)
Expired
Jul 30, 2012, 6:15 PM CDT
In force
54 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Escambia County, AL, Santa Rosa County, FL

The radar

The Eglin Afb radar (KEVX), 101 km from the middle of the area, began a volume at 22:21 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, 10.4 hours before the alert went out and 244 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 2012-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 102 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 2012-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.19395878Sfc1 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
102 J/kg
Mixed-layer CIN
-258 J/kg
Mixed-layer LCL
1552 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

009 
WUUS54 KMOB 302221
SVRMOB
ALC053-FLC113-302315-
/O.NEW.KMOB.SV.W.0156.120730T2221Z-120730T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
521 PM CDT MON JUL 30 2012

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN SANTA ROSA COUNTY IN NORTHWEST FLORIDA...
  EAST CENTRAL ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 615 PM CDT

* AT 516 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS OVER 60 MPH WAS LOCATED 13 MILES EAST
  OF EAST BREWTON...OR 7 MILES SOUTH OF US 29 AND CR 43...AND MOVING
  SOUTH AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RURAL NORTHEASTERN SANTA ROSA COUNTY
  RURAL EAST CENTRAL ESCAMBIA COUNTY

LAT...LON 3101 8679 3078 8680 3079 8709 3118 8691
      3115 8676
TIME...MOT...LOC 2221Z 003DEG 9KT 3105 8684

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 10:28 AM CDTHeat AdvisoryMOB5 hr
Jul 30, 12:52 PM CDTSpecial Marine WarningMOB68 min
Jul 30, 1:25 PM CDTSpecial Marine WarningMOB65 min
Jul 30, 2:02 PM CDTSpecial Marine WarningMOB88 min
Jul 30, 2:27 PM CDTSevere Thunderstorm WarningMOBMobile, Washington17 min
Jul 30, 2:28 PM CDTSpecial Marine WarningMOB92 min
Jul 30, 2:34 PM CDTSpecial Marine WarningMOB86 min
Jul 30, 2:49 PM CDTSevere Thunderstorm WarningMOBBaldwin56 min
Jul 30, 3:03 PM CDTSpecial Marine WarningMOB87 min
Jul 30, 3:04 PM CDTSevere Thunderstorm WarningMOBBaldwin56 min
Jul 30, 3:30 PM CDTSpecial Marine WarningMOB90 min
Jul 30, 3:38 PM CDTSevere Thunderstorm WarningMOBBaldwin67 min
Jul 30, 4:03 PM CDTSpecial Marine WarningMOB87 min
Jul 30, 4:14 PM CDTSevere Thunderstorm WarningMOBMobile61 min
Jul 30, 4:53 PM CDTSpecial Marine WarningMOB97 min
Jul 30, 5:11 PM CDTSevere Thunderstorm WarningMOBCovington64 min
Jul 30, 6:34 PM CDTSevere Thunderstorm WarningMOBCovington47 min
Jul 30, 1:49 PM CDTSevere Thunderstorm WarningMOBOkaloosa, Santa Rosa41 min
Jul 30, 2:12 PM CDTAreal Flood AdvisoryMOBEscambia, Okaloosa, Santa Rosa2 hr
Jul 30, 2:29 PM CDTSevere Thunderstorm WarningMOBOkaloosa, Santa Rosa46 min
Jul 30, 2:41 PM CDTSevere Thunderstorm WarningMOBEscambia49 min
Jul 30, 3:15 PM CDTAreal Flood AdvisoryMOBOkaloosa2 hr

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.