Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 239, NWS Tallahassee, FL

July 3, 2012Gadsden County, Leon County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 3, 2012, 5:39 PM EDT for Gadsden County, Leon County, Florida. It was in force for 36 min. 1 report 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 3, 2012, 5:39 PM EDT (21:39 UTC)
Expired
Jul 3, 2012, 6:15 PM EDT
In force
36 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

Counties Gadsden County, FL, Leon County, FL

The radar

The Tallahassee radar (KTLH), 23 km from the middle of the area, began a volume at 21:39 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 3, 6:00 PM EDTTSTM WND DMG2 W Miccosukee, FLTREE DOWN PARTIALLY BLOCKING ROAD NEAR 11427 MOCCASIN GAP ROAD.

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, 9.7 hours before the alert went out and 22 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 2012-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1410 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2012-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 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
1410 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1092 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
10 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.

370 
WUUS52 KTAE 032139
SVRTAE
FLC039-073-032215-
/O.NEW.KTAE.SV.W.0239.120703T2139Z-120703T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
539 PM EDT TUE JUL 3 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN GADSDEN COUNTY IN FLORIDA...
  NORTHEASTERN LEON COUNTY IN FLORIDA...

* UNTIL 615 PM EDT

* AT 535 PM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH.  THIS STORM WAS LOCATED NEAR ORCHARD POND...AND MOVING
  NORTHEAST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  FOREST MEADOWS PARK...MACLAY STATE GARDENS...CONCORD...LAKE
  IAMONIA...MICCOSUKEE...KILLEARN LAKES...IAMONIA...MOCCASIN GAP...
  PISGAH CHURCH AND BRADFORDVILLE

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 3050 8435 3061 8442 3069 8431 3067 8401
      3056 8399
TIME...MOT...LOC 2139Z 246DEG 5KT 3058 8431

$$

42-DVD
1 follow-up statement
960 
WWUS52 KTAE 032208
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
608 PM EDT TUE JUL 3 2012

FLC039-073-032219-
/O.EXP.KTAE.SV.W.0239.000000T0000Z-120703T2215Z/
LEON FL-GADSDEN FL-
608 PM EDT TUE JUL 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GADSDEN AND
NORTHEASTERN LEON COUNTIES WILL EXPIRE AT 615 PM EDT...

THE STORM HAS WEAKENED BELOW SEVERE LIMITS.

RELAY REPORTS OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN
TALLAHASSEE AT (8 5 0) 9 4 2 8 8 3 3. OR...YOU MAY CONTACT THE
NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT.
THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

LAT...LON 3050 8435 3061 8442 3069 8431 3067 8401
      3056 8399
TIME...MOT...LOC 2209Z 246DEG 5KT 3060 8427

$$

42-DVD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 2:39 PM EDTSevere Thunderstorm WarningTAEWashington31 min
Jul 3, 2:51 PM EDTSevere Thunderstorm WarningTAEBay, Calhoun, Washington39 min
Jul 3, 3:07 PM EDTSevere Thunderstorm WarningTAEJackson53 min
Jul 3, 3:32 PM EDTSevere Thunderstorm WarningTAEHolmes, Walton43 min
Jul 3, 3:39 PM EDTSevere Thunderstorm WarningTAEJackson51 min
Jul 3, 4:27 PM EDTSevere Thunderstorm WarningTAEGadsden, Leon, Liberty, Wakulla48 min
Jul 3, 5:02 PM EDTSevere Thunderstorm WarningTAELeon, Wakulla43 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.