Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 342, NWS Tallahassee, FL

July 30, 20125 counties in Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 30, 2012, 1:47 PM CDT for 5 counties in Florida. It was in force for 58 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 30, 2012, 1:47 PM CDT (18:47 UTC)
Expired
Jul 30, 2012, 2:45 PM CDT
In force
58 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

Counties Bay County, FL, Calhoun County, FL, Gulf County, FL, Walton County, FL, Washington County, FL

The radar

The Eglin Afb radar (KEVX), 45 km from the middle of the area, began a volume at 18:48 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, 2:20 PM CDTTSTM WND DMG1 Se Youngstown, FLTREE DOWN ON SCOTTS FERRY RD AT THE INTERSECTION OF CLEMENTS RD.
Jul 30, 2:25 PM CDTTSTM WND DMG2 E Hiland Park, FLTREE ON A HOUSE ON KELDAVE RD.
Jul 30, 2:26 PM CDTTSTM WND DMGEse Panama City, FLPOWER LINES DOWN AT THE INTERSECTION OF W. 13TH STREET AND GRACE AVENUE.
Jul 30, 2:35 PM CDTTSTM WND DMG2 Se Panama City, FLPOWER LINES DOWN ALONG HARRIS DR.

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

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 6.8 hours before the alert went out and 131 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 2012-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3159 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 2012-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
3159 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
518 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
73 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.

672 
WUUS52 KTAE 301847
SVRTAE
FLC005-013-045-131-133-301945-
/O.NEW.KTAE.SV.W.0342.120730T1847Z-120730T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
147 PM CDT MON JUL 30 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BAY COUNTY IN THE PANHANDLE OF FLORIDA...
  SOUTHWESTERN CALHOUN COUNTY IN THE PANHANDLE OF FLORIDA...
  NORTHWESTERN GULF COUNTY IN THE PANHANDLE OF FLORIDA...
  EXTREME SOUTHEASTERN WALTON COUNTY IN THE PANHANDLE OF FLORIDA...
  SOUTHEASTERN WASHINGTON COUNTY IN THE PANHANDLE OF FLORIDA...

* UNTIL 245 PM CDT

* AT 143 PM CDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  18 MILES NORTHWEST OF PANAMA CITY BEACH TO 25 MILES NORTH OF LYNN
  HAVEN...OR ALONG A LINE EXTENDING FROM PORT WASHINGTON TO WAUSAU...
  AND MOVING SOUTHEAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HILAND PARK...PANAMA CITY...SPRINGFIELD...CALLAWAY AND TYNDALL AFB

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY. PEOPLE OUTSIDE SHOULD MOVE INSIDE A STRONG BUILDING BUT
AWAY FROM WINDOWS.

&&

LAT...LON 3062 8552 3029 8517 3007 8541 3003 8545
      2997 8552 3005 8560 3009 8570 3019 8585
      3027 8600 3026 8601 3030 8611
TIME...MOT...LOC 1847Z 309DEG 31KT 3032 8608 3056 8551

$$

42-DVD
1 follow-up statement
840 
WWUS52 KTAE 301919
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
219 PM CDT MON JUL 30 2012

FLC005-013-045-131-133-301945-
/O.CON.KTAE.SV.W.0342.000000T0000Z-120730T1945Z/
CALHOUN FL-GULF FL-BAY FL-WASHINGTON FL-WALTON FL-
219 PM CDT MON JUL 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CDT
FOR EXTREME SOUTHEASTERN WALTON...SOUTH CENTRAL WASHINGTON...BAY...
NORTHWESTERN GULF AND SOUTHWESTERN CALHOUN COUNTIES IN THE PANHANDLE
OF FLORIDA...

AT 216 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM SUNNYSIDE TO PORTER LAKE...MOVING SOUTHEAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GULF
RESORT BEACH...GAINER SPRING...SINGER ROAD...PANAMA CITY 
BEACH...ECONFINA...BID-A-WEE...VICKSBURG...BAHAMA 
BEACH...FOUNTAIN... BENNETT...EDGEWATER GULF BEACH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING AWAY FROM WINDOWS.

&&

LAT...LON 3059 8548 3029 8517 3007 8541 3003 8545
      2997 8552 3005 8560 3009 8570 3019 8585
      3027 8600 3026 8601 3028 8605
TIME...MOT...LOC 1919Z 309DEG 31KT 3020 8594 3051 8548

$$

42-DVD

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 30, 7:59 AM CDTSpecial Weather StatementTAEFranklin, Gulf61 min
Jul 30, 9:39 AM CDTSpecial Weather StatementTAEBay, Franklin, Gulf, Wakulla51 min
Jul 30, 9:43 AM CDTSpecial Marine WarningTAE62 min
Jul 30, 10:55 AM CDTSpecial Weather StatementTAECalhoun, Gadsden, Jefferson, Leon, Liberty, Wakulla65 min
Jul 30, 11:13 AM CDTSpecial Weather StatementTAEDixie, Lafayette, Taylor62 min
Jul 30, 11:59 AM CDTSpecial Marine WarningTAE61 min
Jul 30, 12:16 PM CDTSpecial Weather StatementTAEDixie, Lafayette, Taylor59 min
Jul 30, 12:32 PM CDTSevere Thunderstorm WarningTAEDixie43 min
Jul 30, 12:45 PM CDTSevere Thunderstorm WarningTAEWalton45 min
Jul 30, 12:54 PM CDTSevere Thunderstorm WarningTAEHolmes, Walton, Washington51 min
Jul 30, 1:12 PM CDTSevere Thunderstorm WarningTAEBay, Walton, Washington63 min
Jul 30, 1:30 PM CDTSevere Thunderstorm WarningTAEWalton45 min
Jul 30, 1:44 PM CDTSpecial Marine WarningTAE106 min
Jul 30, 2:09 PM CDTSevere Thunderstorm WarningTAEWalton51 min
Jul 30, 2:39 PM CDTSevere Thunderstorm WarningTAEBay, Calhoun, Gulf, Liberty66 min
Jul 30, 3:12 PM CDTSpecial Marine WarningTAE2 hr
Jul 30, 3:49 PM CDTSevere Thunderstorm WarningTAELiberty31 min
Jul 30, 3:54 PM CDTSevere Thunderstorm WarningTAECalhoun, Liberty26 min
Jul 30, 4:28 PM CDTSevere Thunderstorm WarningTAEWalton12 min
Jul 30, 6:12 PM CDTSpecial Weather StatementTAEJefferson48 min
Jul 30, 6:50 PM CDTSevere Thunderstorm WarningTAEJefferson, Leon40 min
Jul 30, 6:55 PM CDTSevere Thunderstorm WarningTAEHolmes, Walton50 min

Nearby

Severe 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.