Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 270, NWS Tallahassee, FL

July 17, 2012Gadsden County, Liberty County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 17, 2012, 1:57 PM EDT for Gadsden County, Liberty County, Florida. It was in force for 48 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, 1:57 PM EDT (17:57 UTC)
Expired
Jul 17, 2012, 2:45 PM EDT
In force
48 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

Counties Gadsden County, FL, Liberty County, FL

The radar

The Tallahassee radar (KTLH), 48 km from the middle of the area, began a volume at 17:57 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, 6.0 hours before the alert went out and 51 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.

718 
WUUS52 KTAE 171757
SVRTAE
FLC039-077-171845-
/O.NEW.KTAE.SV.W.0270.120717T1757Z-120717T1845Z/

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

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL GADSDEN COUNTY IN FLORIDA...
  LIBERTY COUNTY IN FLORIDA...

* UNTIL 245 PM EDT

* AT 155 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 NEAR TELOGIA...
  AND MOVING SOUTH AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CLIO...LIBERTY...JENSEN PLACE...VILAS...OWENS BRIDGE...EAST CAMP...
  JEWEL FIRE TOWER...NIXON GARDEN...WILMA...TWIN POLE...SUMATRA...
  KERN AND CENTRAL CITY

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 3002 8510 3053 8483 3048 8456 3041 8459
      3041 8462 3033 8471 3032 8470 3027 8474
      3025 8470 3020 8467 3001 8472 3001 8500
      2998 8502
TIME...MOT...LOC 1757Z 006DEG 10KT 3034 8478

$$

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, 1:09 PM EDTSevere Thunderstorm WarningTAEFranklin51 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, 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.