Alert archive / Florida / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 252, NWS Tallahassee, FL

July 2, 20094 counties in Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 2, 2009, 5:08 PM EDT for 4 counties in Florida. It was in force for 37 min. 9 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 2, 2009, 5:08 PM EDT (21:08 UTC)
Expired
Jul 2, 2009, 5:45 PM EDT
In force
37 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

Counties Gadsden County, FL, Jefferson County, FL, Leon County, FL, Wakulla County, FL

The radar

The Tallahassee radar (KTLH), 7 km from the middle of the area, began a volume at 21:08 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 2, 5:15 PM EDTHAIL 0.8810 W Tallahassee, FLHAIL REPORTED ON INTERSTATE 10.
Jul 2, 5:20 PM EDTHAIL 0.5Tallahassee, FLPEA TO DIME SIZE HAIL ON DUVAL STREET AND AT APALACHEE PARKWAY AT MAGNOLIA.
Jul 2, 5:28 PM EDTHAIL 0.75Tallahassee, FLHAIL REPORTED AT THE TALLAHASSEE MALL.
Jul 2, 5:33 PM EDTHAIL 0.25Tallahassee, FLHAIL REPORTED AT THE TALLAHASSEE REGIONAL AIRPORT.
Jul 2, 5:35 PM EDTTSTM WND DMGTallahassee, FLSTRUCTURAL ROOF DAMAGE TO A TOYS R US STORE ON APALACHEE PARKWAY. DAMAGE TO ALLTELL STORE ON SOUTH MONROE STREET.
Jul 2, 5:35 PM EDTTSTM WND GST 70Tallahassee, FLSTRUCTURAL ROOF DAMAGE TO A TOYS R US STORE ON APALACHEE PARKWAY. DAMAGE TO ALLTELL STORE ON SOUTH MONROE STREET. A NWS STORM SURVEY TEAM DETERMINED THAT THE DAMAGE AT BOTH LOCATIONS WAS DUE TO STRAIGHT LINE WINDS. WINDS AT THE ALLTELL STORE WERE ESTIMATED AT
Jul 2, 5:46 PM EDTTSTM WND DMGTallahassee, FLSEVERAL TREES DOWN IN THE INDIANHEAD ACRES NEIGHBORHOOD.
Jul 2, 5:46 PM EDTTSTM WND GST 75Tallahassee, FLNUMEROUS TREES WERE SNAPPED OR DOWNED THROUGHOUT THE INDIAN HEAD SUBDIVISION. THIS DAMAGE EXTENDED AROUND ONE HALF A MILE DIRECTLY SOUTH OF THE TOYS R US AND EASTWARD TO HALF A MILE WEST OF BLAIRSTONE ROAD. THE MOST SIGNIFICANT TREE DAMAGE OCCURRED ALONG OLD S
Jul 2, 5:51 PM EDTHAIL 0.75Tallahassee, FLHAIL REPORTED ON ROUTE 319...CAPITAL CIRCLE.

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, 9.1 hours before the alert went out and 10 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 2009-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1103 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 2009-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -34 square meters per square second.193958Sfc1 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
1103 J/kg
Mixed-layer CIN
-106 J/kg
Mixed-layer LCL
1174 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-34 m²/s²
0-3 km storm-relative helicity
-3 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.

000 
WUUS52 KTAE 022108
SVRTAE
FLC039-065-073-129-022145-
/O.NEW.KTAE.SV.W.0252.090702T2108Z-090702T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
508 PM EDT THU JUL 2 2009

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN GADSDEN COUNTY IN FLORIDA...
  NORTHERN JEFFERSON COUNTY IN FLORIDA...
  LEON COUNTY IN FLORIDA...
  THIS INCLUDES THE CITY OF TALLAHASSEE...
  WESTERN WAKULLA COUNTY IN FLORIDA...

* UNTIL 545 PM EDT

* AT 506 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 17 MILES NORTH OF TALLAHASSEE TO 
  20 MILES WEST OF CRAWFORDVILLE AND MOVING SOUTHEAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  TALLAHASSEE BY 530 PM EDT...
  WOODVILLE BY 545 PM EDT...

THIS INCLUDES INTERSTATE 10 BETWEEN EXITS 192 AND 217

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. 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.

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 3029 8470 3068 8424 3065 8379 3006 8458
TIME...MOT...LOC 2106Z 332DEG 18KT 3028 8470 3067 8420

$$

BARRY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 2:54 PM EDTSevere Thunderstorm WarningTAEWashington66 min
Jul 2, 5:22 PM EDTSevere Thunderstorm WarningTAEJefferson, Lafayette, Leon, Madison, Taylor, Wakulla53 min
Jul 2, 5:26 PM EDTAreal Flood WarningTAELeon, Liberty, Wakulla79 min
Jul 2, 5:38 PM EDTAreal Flood WarningTAEJefferson, Madison82 min

Nearby

Severe Thunderstorm Warnings in Florida, 2009Every severe thunderstorm warning in 2009

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.