Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 263, NWS Tallahassee, FL

July 17, 2012Franklin County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 17, 2012, 1:09 PM EDT for Franklin County, Florida. It was in force for 51 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 17, 2012, 1:09 PM EDT (17:09 UTC)
Expired
Jul 17, 2012, 2:00 PM EDT
In force
51 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

County Franklin County, FL

The radar

The Tallahassee radar (KTLH), 86 km from the middle of the area, began a volume at 17:11 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 17, 12:49 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 5.2 hours before the alert went out and 88 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 2012-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2058 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 2012-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
2058 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
906 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
38 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.

793 
WUUS52 KTAE 171709
SVRTAE
FLC037-171800-
/O.NEW.KTAE.SV.W.0263.120717T1709Z-120717T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
109 PM EDT TUE JUL 17 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FRANKLIN COUNTY IN FLORIDA...

* UNTIL 200 PM EDT

* AT 107 PM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
  NORTHEAST OF CARRABELLE...OR NEAR LANARK VILLAGE...AND MOVING SOUTH
  AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  EASTPOINT...ST GEORGE ISLAND AND APALACHICOLA

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.

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU
CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 2963 8511 2968 8508 2961 8502 2968 8486
      2978 8489 2970 8504 2971 8505 3000 8468
      2994 8433 2991 8453 2979 8464 2982 8456
      2979 8461 2977 8469 2959 8498
TIME...MOT...LOC 1709Z 011DEG 8KT 2991 8457

$$

38-GODSEY
1 follow-up statement
016 
WWUS52 KTAE 171735
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
135 PM EDT TUE JUL 17 2012

FLC037-171800-
/O.CON.KTAE.SV.W.0263.000000T0000Z-120717T1800Z/
FRANKLIN FL-
135 PM EDT TUE JUL 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM
EDT/100 PM CDT/ FOR FRANKLIN COUNTY...

AT 130 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED NEAR EASTPOINT...MOVING SOUTH AT 5 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND 
LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! 
LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU 
CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT 
TUESDAY EVENING FOR SOUTHEAST ALABAMA AND NORTH FLORIDA AND 
SOUTHWESTERN GEORGIA.

&&

LAT...LON 2963 8511 2968 8508 2961 8502 2968 8486
      2978 8489 2970 8504 2971 8505 3000 8468
      2994 8433 2991 8453 2979 8464 2982 8456
      2979 8461 2977 8469 2959 8498
TIME...MOT...LOC 1735Z 340DEG 2KT 2973 8484

$$

38-GODSEY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 9:36 PM EDTSpecial Marine WarningTAE84 min
Jul 16, 9:45 PM EDTSpecial Weather StatementTAEDixie30 min
Jul 16, 10:06 PM EDTSevere Thunderstorm WarningTAETaylor24 min
Jul 16, 10:10 PM EDTSpecial Marine WarningTAE2 hr
Jul 16, 11:24 PM EDTSpecial Marine WarningTAE51 min
Jul 17, 12:11 AM EDTSpecial Marine WarningTAE64 min
Jul 17, 12:14 AM EDTSpecial Marine WarningTAE91 min
Jul 17, 4:15 AM EDTSpecial Marine WarningTAE2 hr
Jul 17, 1:07 PM EDTSpecial Marine WarningTAE83 min
Jul 17, 1:18 PM EDTSevere Thunderstorm WarningTAEJefferson, Madison42 min
Jul 17, 1:23 PM EDTSpecial Marine WarningTAE82 min
Jul 17, 1:26 PM EDTSevere Thunderstorm WarningTAEJackson, Washington49 min
Jul 17, 1:57 PM EDTSevere Thunderstorm WarningTAEGadsden, Liberty48 min
Jul 17, 2:12 PM EDTSevere Thunderstorm WarningTAEBay, Gulf48 min
Jul 17, 2:20 PM EDTSevere Thunderstorm WarningTAEJefferson, Madison, Taylor40 min
Jul 17, 2:38 PM EDTSevere Thunderstorm WarningTAEFranklin, Gulf, Liberty52 min
Jul 17, 2:46 PM EDTSpecial Marine WarningTAE74 min
Jul 17, 2:49 PM EDTSevere Thunderstorm WarningTAEBay, Gulf41 min
Jul 17, 3:00 PM EDTSevere Thunderstorm WarningTAEJefferson, Taylor60 min
Jul 17, 3:03 PM EDTSevere Thunderstorm WarningTAEJefferson, Leon, Wakulla57 min
Jul 17, 3:06 PM EDTSevere Thunderstorm WarningTAECalhoun39 min
Jul 17, 3:17 PM EDTSevere Thunderstorm WarningTAEBay58 min
Jul 17, 3:21 PM EDTSpecial Marine WarningTAE84 min
Jul 17, 3:22 PM EDTSevere Thunderstorm WarningTAEJefferson, Leon23 min
Jul 17, 3:30 PM EDTSevere Thunderstorm WarningTAELeon, Wakulla60 min
Jul 17, 3:30 PM EDTSevere Thunderstorm WarningTAECalhoun, Gadsden, Jackson, Liberty30 min
Jul 17, 3:45 PM EDTSevere Thunderstorm WarningTAEJefferson, Leon45 min
Jul 17, 3:48 PM EDTSevere Thunderstorm WarningTAEDixie, Lafayette, Taylor57 min
Jul 17, 3:52 PM EDTSpecial Marine WarningTAE68 min
Jul 17, 4:05 PM EDTSevere Thunderstorm WarningTAEBay, Walton, Washington25 min
Jul 17, 4:07 PM EDTAreal Flood AdvisoryTAELeon3 hr
Jul 17, 4:08 PM EDTSevere Thunderstorm WarningTAEHolmes, Walton, Washington37 min
Jul 17, 4:15 PM EDTSevere Thunderstorm WarningTAEWakulla45 min
Jul 17, 4:20 PM EDTSevere Thunderstorm WarningTAEWalton25 min
Jul 17, 4:31 PM EDTSevere Thunderstorm WarningTAEWalton29 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.