Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 285, NWS Tallahassee, FL

July 17, 2012Leon County, Wakulla County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 17, 2012, 3:30 PM EDT for Leon County, Wakulla County, Florida. It was in force for 60 min. 13 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 17, 2012, 3:30 PM EDT (19:30 UTC)
Expired: Jul 17, 2012, 4:30 PM EDT
In force: 60 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Leon County, FL, Wakulla County, FL

The radar

The Tallahassee radar (KTLH), 6 km from the middle of the area, began a volume at 19:30 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

Time	Report	Where	Remark
Jul 17, 3:53 PM EDT	TSTM WND DMG	5 E Tallahassee, FL	ROOF DAMAGE AT PINEY Z.
Jul 17, 3:54 PM EDT	TSTM WND DMG	6 E Tallahassee, FL	TREE ON HOUSE AT 5504 HAMPTON OAK PLACE.
Jul 17, 3:58 PM EDT	TSTM WND DMG	1 Nnw Ralford Greenway, FL	TREE DOWN ON POWER LINE AT BUCKLAKE ROAD AT PEDRICK ROAD.
Jul 17, 3:58 PM EDT	TSTM WND DMG	2 N Chaires, FL	A CAR CRASHED INTO A TREE ON BUCKLAKE ROAD AT CHAIRES ROAD.
Jul 17, 4:02 PM EDT	TSTM WND DMG	3 Sw Tallahassee, FL	TREE DOWN ON SPRINGHILL ROAD ONE MILE SOUTH OF ORANGE AVENUE.
Jul 17, 4:04 PM EDT	HAIL 0.75	3 Se Tallahassee, FL	DIME SIZE HAIL AT BLAIRSTONE ROAD AND ORANGE AVENUE.
Jul 17, 4:04 PM EDT	HAIL 0.75	Woodville, FL	PENNY SIZE HAIL.
Jul 17, 4:13 PM EDT	TSTM WND DMG	5 Ese Tallahassee, FL	TREES AND LIMBS ON POWERLINES AT OLD ST. AUGUSTINE ROAD AT SOUTHWOOD PLANTATION ROAD.
Jul 17, 4:14 PM EDT	TSTM WND DMG	6 E Tallahassee, FL	TREE ON ROAD AT MARCH ROAD AT APALACHEE PARKWAY.
Jul 17, 4:27 PM EDT	TSTM WND DMG	3 Nw Tallahassee, FL	TREE ON ROADWAY AT STONE ROAD AT OLD BAINBRIDGE ROAD.
Jul 17, 4:28 PM EDT	TSTM WND DMG	6 Ssw Tallahassee, FL	TREES DOWN ON RIVERS ROAD AND LAFRANCE ROAD, NEAR CRAWFORDVILLE HIGHWAY.
Jul 17, 4:30 PM EDT	TSTM WND DMG	4 Nw Woodville, FL	TREES DOWN AT CORNER OF LA FRANCE AND RIVER ROADS.
Jul 17, 4:40 PM EDT	TSTM WND DMG	2 N Shadeville, FL	ONE TREE DOWN ON STATE ROAD 267.

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 17, 12:49 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.5 hours before the alert went out and 7 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

590 
WUUS52 KTAE 171930
SVRTAE
FLC073-129-172030-
/O.NEW.KTAE.SV.W.0285.120717T1930Z-120717T2030Z/

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

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL LEON COUNTY IN FLORIDA...
  NORTHEASTERN WAKULLA COUNTY IN FLORIDA...

* UNTIL 430 PM EDT

* AT 325 PM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 9 MILES NORTH OF TALLAHASSEE TO 10     
  MILES EAST OF TALLAHASSEE MOVING SOUTHWEST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO STATE
  CAPITAL COMPLEX...LEON COUNTY CIVIC CENTER...DOWNTOWN              
  TALLAHASSEE...AND THE FLORIDA STATE UNIVERSITY.

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 3044 8453 3046 8450 3045 8446 3047 8441
      3051 8441 3053 8439 3057 8438 3061 8433
      3050 8411 3047 8407 3020 8408 3015 8425
TIME...MOT...LOC 1929Z 061DEG 11KT 3057 8430 3044 8412
          3034 8410

$$

38-GODSEY

1 follow-up statement

649 
WWUS52 KTAE 172000
SVSTAE

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

FLC073-129-172030-
/O.CON.KTAE.SV.W.0285.000000T0000Z-120717T2030Z/
LEON FL-WAKULLA FL-
400 PM EDT TUE JUL 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHEASTERN WAKULLA AND CENTRAL LEON COUNTIES...

AT 357 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS 
WERE LOCATED ALONG A LINE EXTENDING FROM LAKE JACKSON TO NATURAL 
BRIDGE...MOVING WEST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
DOWNTOWN TALLAHASSEE...THE FLORIDA STATE UNIVERSITY...TALLAHASSEE 
REGIONAL A/P...AND BETHEL

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS ACROSS 
EASTERN LEON COUNTY. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS!

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

&&

LAT...LON 3044 8453 3046 8450 3045 8446 3047 8441
      3051 8441 3053 8439 3057 8438 3061 8433
      3050 8411 3047 8407 3020 8408 3015 8425
TIME...MOT...LOC 1959Z 073DEG 19KT 3053 8440 3028 8420

$$

38-GODSEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 9:36 PM EDT	Special Marine Warning	TAE		84 min
Jul 16, 9:45 PM EDT	Special Weather Statement	TAE	Dixie	30 min
Jul 16, 10:06 PM EDT	Severe Thunderstorm Warning	TAE	Taylor	24 min
Jul 16, 10:10 PM EDT	Special Marine Warning	TAE		2 hr
Jul 16, 11:24 PM EDT	Special Marine Warning	TAE		51 min
Jul 17, 12:11 AM EDT	Special Marine Warning	TAE		64 min
Jul 17, 12:14 AM EDT	Special Marine Warning	TAE		91 min
Jul 17, 4:15 AM EDT	Special Marine Warning	TAE		2 hr
Jul 17, 1:07 PM EDT	Special Marine Warning	TAE		83 min
Jul 17, 1:09 PM EDT	Severe Thunderstorm Warning	TAE	Franklin	51 min
Jul 17, 1:18 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Madison	42 min
Jul 17, 1:23 PM EDT	Special Marine Warning	TAE		82 min
Jul 17, 1:26 PM EDT	Severe Thunderstorm Warning	TAE	Jackson, Washington	49 min
Jul 17, 1:57 PM EDT	Severe Thunderstorm Warning	TAE	Gadsden, Liberty	48 min
Jul 17, 2:12 PM EDT	Severe Thunderstorm Warning	TAE	Bay, Gulf	48 min
Jul 17, 2:20 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Madison, Taylor	40 min
Jul 17, 2:38 PM EDT	Severe Thunderstorm Warning	TAE	Franklin, Gulf, Liberty	52 min
Jul 17, 2:46 PM EDT	Special Marine Warning	TAE		74 min
Jul 17, 2:49 PM EDT	Severe Thunderstorm Warning	TAE	Bay, Gulf	41 min
Jul 17, 3:00 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Taylor	60 min
Jul 17, 3:03 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Leon, Wakulla	57 min
Jul 17, 3:06 PM EDT	Severe Thunderstorm Warning	TAE	Calhoun	39 min
Jul 17, 3:17 PM EDT	Severe Thunderstorm Warning	TAE	Bay	58 min
Jul 17, 3:21 PM EDT	Special Marine Warning	TAE		84 min
Jul 17, 3:22 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Leon	23 min
Jul 17, 3:30 PM EDT	Severe Thunderstorm Warning	TAE	Calhoun, Gadsden, Jackson, Liberty	30 min
Jul 17, 3:45 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Leon	45 min
Jul 17, 3:48 PM EDT	Severe Thunderstorm Warning	TAE	Dixie, Lafayette, Taylor	57 min
Jul 17, 3:52 PM EDT	Special Marine Warning	TAE		68 min
Jul 17, 4:05 PM EDT	Severe Thunderstorm Warning	TAE	Bay, Walton, Washington	25 min
Jul 17, 4:07 PM EDT	Areal Flood Advisory	TAE	Leon	3 hr
Jul 17, 4:08 PM EDT	Severe Thunderstorm Warning	TAE	Holmes, Walton, Washington	37 min
Jul 17, 4:15 PM EDT	Severe Thunderstorm Warning	TAE	Wakulla	45 min
Jul 17, 4:20 PM EDT	Severe Thunderstorm Warning	TAE	Walton	25 min
Jul 17, 4:31 PM EDT	Severe Thunderstorm Warning	TAE	Walton	29 min

Nearby

Severe Thunderstorm Warnings in Florida, 2012 Every 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.