Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 26, NWS Tallahassee, FL

February 18, 2012Jackson County, Florida; Seminole County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Feb 18, 2012, 8:50 PM CST for Jackson County, Florida; Seminole County, Georgia. It was in force for 40 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: Feb 18, 2012, 8:50 PM CST (02:50 UTC)
Expired: Feb 18, 2012, 9:30 PM CST
In force: 40 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Jackson County, FL, Seminole County, GA

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 18, 7:24 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 2.8 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-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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 566 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 378 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

642 
WUUS52 KTAE 190250
SVRTAE
FLC063-GAC253-190330-
/O.NEW.KTAE.SV.W.0026.120219T0250Z-120219T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
850 PM CST SAT FEB 18 2012

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JACKSON COUNTY IN THE PANHANDLE OF FLORIDA...
  SEMINOLE COUNTY IN SOUTHWEST GEORGIA...

* UNTIL 930 PM CST/1030 PM EST/

* AT 846 PM CST...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 11 MILES WEST OF
  MARIANNA...OR NEAR COTTONDALE AIRPORT...AND MOVING EAST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO      
  COTTONDALE...MARIANNA...SNEADS...SEMINOLE STATE PARK AND           
  REYNOLDSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A SMALL INTERIOR ROOM.

IN ADDITION TO HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO GROUND 
LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY!

&&

LAT...LON 3093 8544 3097 8476 3084 8477 3082 8479
      3080 8479 3076 8486 3072 8487 3070 8486
      3062 8491 3069 8543 3078 8543 3079 8548
      3081 8548
TIME...MOT...LOC 0249Z 262DEG 38KT 3078 8539

$$

38-GODSEY

1 follow-up statement

590 
WWUS52 KTAE 190309
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
909 PM CST SAT FEB 18 2012

FLC063-GAC253-190330-
/O.CON.KTAE.SV.W.0026.000000T0000Z-120219T0330Z/
JACKSON FL-SEMINOLE GA-
909 PM CST SAT FEB 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM
CST/1030 PM EST/ FOR SOUTHERN SEMINOLE AND EASTERN JACKSON
COUNTIES...

AT 907 PM CST...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 MARIANNA...MOVING EAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TWO
EGG...CYPRESS...DELLWOOD...LOVEDALE...BUENA VISTA...GRAND RIDGE...
HORNSVILLE...INWOOD...HAYNES...SNEADS...FAIRCHILD...DRAKES STILL...
SEMINOLE STATE PARK...LAKE SEMINOLE...DESSER AND REYNOLDSVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CST SUNDAY MORNING/400
AM EST SUNDAY MORNING/ FOR CENTRAL FLORIDA AND SOUTHWESTERN GEORGIA.

&&

LAT...LON 3082 8532 3094 8526 3097 8476 3084 8477
      3082 8479 3080 8479 3076 8486 3072 8487
      3070 8486 3062 8491 3072 8533
TIME...MOT...LOC 0309Z 272DEG 49KT 3080 8512

$$

14-MROCZKA

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 18, 6:41 PM CST	Severe Thunderstorm Warning	TAE	Holmes, Walton	49 min
Feb 18, 6:49 PM CST	Areal Flood Advisory	TAE	Holmes, Walton	3 hr
Feb 18, 7:17 PM CST	Severe Thunderstorm Warning	TAE	Holmes, Jackson, Washington	43 min
Feb 18, 7:34 PM CST	Severe Thunderstorm Warning	TAE	Jackson	41 min
Feb 18, 7:57 PM CST	Flash Flood Warning	TAE	Holmes, Jackson, Walton, Washington	2 hr
Feb 18, 8:45 PM CST	Special Marine Warning	TAE		2 hr
Feb 18, 9:41 PM CST	Flash Flood Warning	TAE	Holmes, Jackson, Walton, Washington	4 hr
Feb 18, 10:38 PM CST	Special Marine Warning	TAE		112 min
Feb 19, 12:15 AM CST	Areal Flood Advisory	TAE	Leon	60 min
Feb 19, 1:20 AM CST	Areal Flood Advisory	TAE	Leon	85 min
Feb 18, 6:24 PM CST	Severe Thunderstorm Warning	TAE	Clay, Early, Miller	51 min
Feb 18, 7:15 PM CST	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Early, Miller	45 min
Feb 18, 7:53 PM CST	Severe Thunderstorm Warning	TAE	Baker, Decatur, Early, Miller, Mitchell, Seminole	37 min
Feb 18, 8:10 PM CST	Severe Thunderstorm Warning	TAE	Baker, Dougherty, Lee, Mitchell, Worth	50 min
Feb 18, 8:11 PM CST	Severe Thunderstorm Warning	TAE	Decatur, Grady	49 min
Feb 18, 8:12 PM CST	Areal Flood Advisory	TAE	Baker, Calhoun, Colquitt, Decatur, Dougherty, Early and 8 more	2 hr
Feb 18, 8:22 PM CST	Severe Thunderstorm Warning	TAE	Colquitt, Mitchell	38 min
Feb 18, 8:39 PM CST	Severe Thunderstorm Warning	TAE	Brooks, Colquitt, Thomas	51 min
Feb 18, 8:44 PM CST	Areal Flood Advisory	TAE	Berrien, Brooks, Colquitt, Cook, Dougherty, Grady and 7 more	2 hr
Feb 18, 8:57 PM CST	Severe Thunderstorm Warning	TAE	Ben Hill, Berrien, Irwin, Tift, Turner, Worth	48 min
Feb 18, 9:02 PM CST	Severe Thunderstorm Warning	TAE	Berrien, Brooks, Colquitt, Cook, Lanier, Lowndes	43 min
Feb 18, 9:30 PM CST	Tornado Warning	TAE	Berrien, Lanier	30 min
Feb 18, 9:46 PM CST	Severe Thunderstorm Warning	TAE	Berrien, Lanier	14 min
Feb 18, 10:47 PM CST	Areal Flood Advisory	TAE	Decatur, Grady, Seminole, Thomas	118 min
Feb 19, 10:12 AM CST	River Flood Warning	TAE	Lee	27 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2012 Severe Thunderstorm Warnings in Georgia, 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; the sounding from the Mesonet's radiosonde archive.