Alert archive / Alabama / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 76, NWS Mobile, AL

April 30, 2014Covington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 30, 2014, 9:04 AM CDT for Covington County, Alabama. It was in force for 26 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
Apr 30, 2014, 9:04 AM CDT (14:04 UTC)
Expired
Apr 30, 2014, 9:30 AM CDT
In force
26 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon

County Covington County, AL

The radar

The Eglin Afb radar (KEVX), 66 km from the middle of the area, began a volume at 14:04 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, 2.1 hours before the alert went out and 237 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 2014-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2014-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
615 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
391 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

420 
WUUS54 KMOB 301404
SVRMOB
ALC039-301430-
/O.NEW.KMOB.SV.W.0076.140430T1404Z-140430T1430Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
ISSUED BY NATIONAL WEATHER SERVICE NEW ORLEANS LA
904 AM CDT WED APR 30 2014

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN COVINGTON COUNTY IN SOUTH CENTRAL ALABAMA...

* UNTIL 930 AM CDT

* AT 859 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  SOUTHEAST OF LIBERTYVILLE...OR 10 MILES SOUTHEAST OF ANDALUSIA...
  AND MOVING NORTHEAST AT 60 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BABBIE...ONYCHA...OPP AND ESTOTHEL

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

PLEASE FOLLOW OUR OFFICE ON BOTH FACEBOOK AND TWITTER FOR MORE
INFORMATION ON SEVERE WEATHER AND TO RELAY WEATHER REPORTS AND
PHOTOS.

&&

LAT...LON 3099 8619 3099 8623 3120 8656 3142 8619
      3107 8619 3099 8618
TIME...MOT...LOC 1404Z 243DEG 54KT 3121 8632

$$

MJH
1 follow-up statement
915 
WWUS54 KMOB 301420
SVSMOB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
ISSUED BY NATIONAL WEATHER SERVICE NEW ORLEANS LA
920 AM CDT WED APR 30 2014

ALC039-301429-
/O.CAN.KMOB.SV.W.0076.000000T0000Z-140430T1430Z/
COVINGTON AL-
920 AM CDT WED APR 30 2014

...THE SEVERE THUNDERSTORM THAT WAS IMPACTING COVINGTON COUNTY HAS 
SHIFTED EASTWARD AND THEREFORE THE WARNING HAS BEEN CANCELLED...

LAT...LON 3099 8619 3099 8623 3120 8656 3142 8619
      3107 8619 3099 8618
TIME...MOT...LOC 1419Z 243DEG 54KT 3131 8608

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 7:35 PM CDTSevere Thunderstorm WarningMOBConecuh, Escambia, Monroe25 min
Apr 29, 7:50 PM CDTFlash Flood WarningMOBBaldwin, Mobile115 min
Apr 29, 8:18 PM CDTSpecial Marine WarningMOB42 min
Apr 29, 8:20 PM CDTSpecial Marine WarningMOB25 min
Apr 29, 8:53 PM CDTRiver Flood WarningMOBBaldwin, Covington, Escambia57 hr
Apr 29, 9:02 PM CDTSevere Thunderstorm WarningMOBCovington43 min
Apr 29, 9:05 PM CDTSpecial Marine WarningMOB40 min
Apr 29, 9:07 PM CDTFlash Flood Warning EmergencyMOBBaldwin, Mobile18 hr
Apr 29, 9:49 PM CDTTornado WarningMOBCovington26 min
Apr 29, 10:23 PM CDTRiver Flood WarningMOBBaldwin40 hr
Apr 29, 10:46 PM CDTSpecial Marine WarningMOB89 min
Apr 29, 11:23 PM CDTRiver Flood WarningMOBBaldwin, Covington, Escambia49 hr
Apr 29, 11:34 PM CDTRiver Flood WarningMOBBaldwin69 hr
Apr 29, 11:43 PM CDTSpecial Marine WarningMOB92 min
Apr 30, 1:26 AM CDTSpecial Marine WarningMOB94 min
Apr 30, 1:43 AM CDTRiver Flood WarningMOBBaldwin50 hr
Apr 30, 2:04 AM CDTSpecial Marine WarningMOB26 min
Apr 30, 2:14 AM CDTSevere Thunderstorm WarningMOBButler, Clarke, Monroe, Wilcox46 min
Apr 30, 2:48 AM CDTSpecial Marine WarningMOB117 min
Apr 30, 4:29 AM CDTSpecial Marine WarningMOB2 hr
Apr 30, 6:26 AM CDTSpecial Marine WarningMOB2 hr
Apr 30, 7:06 AM CDTCoastal Flood StatementMOB8 hr
Apr 30, 10:35 AM CDTRiver Flood WarningMOBBaldwin, Escambia71 hr
Apr 30, 2:06 PM CDTAreal Flood WarningMOBBaldwin, Mobile24 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2014Every severe thunderstorm warning in 2014

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.