Alert archive / Florida / Tornado Warnings in 2018

Tornado Warning 10, NWS Tallahassee, FL

April 7, 2018Jefferson County, Leon County, Wakulla County, Florida

NWS Tallahassee, FL issued this tornado warning at Apr 7, 2018, 11:19 AM EDT for Jefferson County, Leon County, Wakulla County, Florida. It was in force for 10 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: Apr 7, 2018, 11:19 AM EDT (15:19 UTC)
Expired: Apr 7, 2018, 11:29 AM EDT
In force: 10 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

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

The radar

The Tallahassee radar (KTLH), 26 km from the middle of the area, began a volume at 15:21 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 nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 3.3 hours before the alert went out and 24 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: 304 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 696 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

As transmitted.

914 
WFUS52 KTAE 071519
TORTAE
FLC065-073-129-071545-
/O.NEW.KTAE.TO.W.0010.180407T1519Z-180407T1545Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tallahassee FL
1119 AM EDT SAT APR 7 2018

The National Weather Service in Tallahassee has issued a

* Tornado Warning for...
  Northeastern Wakulla County in Big Bend of Florida...
  West central Jefferson County in Big Bend of Florida...
  Southeastern Leon County in Big Bend of Florida...

* Until 1145 AM EDT
    
* At 1119 AM EDT, a severe thunderstorm capable of producing a
  tornado was located near St. Marks, moving northeast at 20 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This tornadic thunderstorm will remain over mainly rural areas of
  northeastern Wakulla...west central Jefferson and southeastern Leon
  Counties, including the following locations: Newport and Fanlew.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3016 8419 3022 8422 3028 8414 3031 8411
      3032 8408 3023 8398
TIME...MOT...LOC 1519Z 234DEG 18KT 3020 8417 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

30-PULLIN

1 follow-up statement

115 
WWUS52 KTAE 071529
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
1129 AM EDT SAT APR 7 2018

FLC065-073-129-071539-
/O.CAN.KTAE.TO.W.0010.000000T0000Z-180407T1545Z/
Wakulla FL-Jefferson FL-Leon FL-
1129 AM EDT SAT APR 7 2018

...THE TORNADO WARNING FOR NORTHEASTERN WAKULLA...WEST CENTRAL
JEFFERSON AND SOUTHEASTERN LEON COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Tallahassee.

LAT...LON 3016 8419 3022 8422 3028 8414 3031 8411
      3032 8408 3023 8398
TIME...MOT...LOC 1527Z 234DEG 18KT 3023 8412 

$$

30-PULLIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 1:08 AM EDT	Rip Current Statement	TAE	Bay, Gulf, Walton	26 hr
Apr 7, 7:59 AM EDT	Tornado Warning	TAE	Holmes, Walton, Washington	31 min
Apr 7, 9:31 AM EDT	Special Weather Statement	TAE	Jackson	44 min
Apr 7, 11:47 AM EDT	Special Marine Warning	TAE		88 min
Apr 7, 12:52 PM EDT	Special Weather Statement	TAE	Madison	38 min
Apr 7, 1:04 PM EDT	Special Marine Warning	TAE		41 min
Apr 7, 1:06 PM EDT	Special Marine Warning	TAE		84 min
Apr 7, 1:47 PM EDT	Special Weather Statement	TAE	Madison	43 min
Apr 7, 1:55 PM EDT	Special Marine Warning	TAE		2 hr
Apr 7, 2:04 PM EDT	Special Weather Statement	TAE	Lafayette, Taylor	56 min
Apr 7, 2:57 PM EDT	Special Weather Statement	TAE	Dixie, Lafayette, Taylor	93 min
Apr 7, 3:35 PM EDT	Severe Thunderstorm Warning	TAE	Dixie, Lafayette, Taylor	55 min

Nearby

Tornado Warnings in Florida, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.