Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 151, NWS Mobile, AL

July 30, 2012Baldwin County, Alabama; Escambia County, Florida

NWS Mobile, AL issued this severe thunderstorm warning at Jul 30, 2012, 2:49 PM CDT for Baldwin County, Alabama; Escambia County, Florida. It was in force for 56 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
Jul 30, 2012, 2:49 PM CDT (19:49 UTC)
Expired
Jul 30, 2012, 3:45 PM CDT
In force
56 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

Counties Baldwin County, AL, Escambia County, FL

The radar

The Mobile radar (KMOB), 69 km from the middle of the area, began a volume at 19:50 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 30, 3:20 PM CDTHIGH SUST WINDS 0Foley, ALTREES DOWN BRINGING DOWN POWER LINES IN VICINITY OF FOLEY BEACH EXPRESS TOLLWAY.
Jul 30, 3:40 PM CDTHAIL 0.75Robertsdale, ALDIME SIZE HAIL REPORTED

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.8 hours before the alert went out and 210 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, Slidell Radar S, LA at 12:00Z on 2012-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3604 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, Slidell Radar S, LA at 12:00Z on 2012-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -84 square meters per square second.193958Sfc1 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
3604 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
631 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-84 m²/s²
0-3 km storm-relative helicity
-18 m²/s²
Significant tornado parameter
0.0
Supercell composite
-4.2

Open this sounding in Storm Lab

The text

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

928 
WUUS54 KMOB 301949
SVRMOB
ALC003-FLC033-302045-
/O.NEW.KMOB.SV.W.0151.120730T1949Z-120730T2045Z/

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

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL ESCAMBIA COUNTY IN NORTHWEST FLORIDA...
  CENTRAL BALDWIN COUNTY IN SOUTHWEST ALABAMA...

* UNTIL 345 PM CDT

* AT 241 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING
  WINDS OVER 60 MPH WAS LOCATED 9 MILES EAST OF LOXLEY...OR 12
  MILES NORTHEAST OF SILVERHILL...AND MOVING SOUTH AT 15 TO 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BELLVIEW...           SUMMERDALE...         SILVERHILL...
  ROBERTSDALE...        LOXLEY...             FOLEY...
  ELBERTA...

THIS INCLUDES INTERSTATE 10 IN FLORIDA BETWEEN MILE MARKERS 1 AND 5.
THIS INCLUDES INTERSTATE 10 IN ALABAMA BETWEEN MILE MARKERS 44 AND
66.

LAT...LON 3035 8769 3060 8778 3079 8776 3083 8756
      3069 8740 3046 8732 3044 8736 3045 8738
      3044 8739
TIME...MOT...LOC 1949Z 347DEG 18KT 3063 8760

$$

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, 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, 5:21 PM CDTSevere Thunderstorm WarningMOBEscambia54 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.