Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 71, NWS Tallahassee, FL

June 20, 2017Franklin County, Florida

NWS Tallahassee, FL issued this tornado warning at Jun 20, 2017, 10:00 AM EDT for Franklin County, Florida. It was in force for 45 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: Jun 20, 2017, 10:00 AM EDT (14:00 UTC)
Expired: Jun 20, 2017, 10:45 AM EDT
In force: 45 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Franklin County, FL

The radar

The Tallahassee radar (KTLH), 108 km from the middle of the area, began a volume at 14:01 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
Jun 20, 10:15 AM EDT	TORNADO	3 Wsw St George Island, FL	TORNADO MOVED ONSHORE WESTERN PORTION OF ST. GEORGE ISLAND, CAUSING MINOR DAMAGE TO TREES AND THREE HOMES. VIDEO CONFIRMED TORNADO WAS ON GROUND AS IT CROSSED THE BEACH. DAMAGE CONSISTENT WITH HIGH-END EF0 RATING AND MAXIMUM WINDS OF 85 MPH.

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, 2.0 hours before the alert went out and 110 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: 110 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 580 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

664 
WFUS52 KTAE 201400
TORTAE
FLC037-201445-
/O.NEW.KTAE.TO.W.0071.170620T1400Z-170620T1445Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tallahassee FL
1000 AM EDT TUE JUN 20 2017

The National Weather Service in Tallahassee has issued a

* Tornado Warning for...
  Southwestern Franklin County in Big Bend of Florida...

* Until 1045 AM EDT
    
* At 959 AM EDT, a severe thunderstorm capable of producing a tornado
  was located near St George Island, moving northwest 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 dangerous storm will be near...
  Apalachicola around 940 AM CDT. 

Other locations impacted by this tornadic thunderstorm include
Apalachicola Airport and Saint George Island. 

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 2966 8521 2977 8497 2959 8484 2955 8496
TIME...MOT...LOC 1359Z 130DEG 18KT 2958 8488 

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

$$

38-GODSEY

2 follow-up statements

590 
WWUS52 KTAE 201414
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
1014 AM EDT TUE JUN 20 2017

FLC037-201445-
/O.CON.KTAE.TO.W.0071.000000T0000Z-170620T1445Z/
Franklin FL-
1014 AM EDT TUE JUN 20 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 AM EDT FOR
SOUTHWESTERN FRANKLIN COUNTY...
    
At 1014 AM EDT, a severe thunderstorm capable of producing a tornado
was located near St George Island, moving northwest 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 dangerous storm will be near...
  Apalachicola around 1045 AM EDT. 

Other locations impacted by this tornadic thunderstorm include
Apalachicola Airport and Saint George Island. 

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 2970 8513 2977 8497 2962 8486 2959 8490
TIME...MOT...LOC 1414Z 141DEG 16KT 2964 8491 

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

$$

38-GODSEY

788 
WWUS52 KTAE 201425
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
1025 AM EDT TUE JUN 20 2017

FLC037-201445-
/O.CON.KTAE.TO.W.0071.000000T0000Z-170620T1445Z/
Franklin FL-
1025 AM EDT TUE JUN 20 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1045 AM EDT FOR WEST
CENTRAL FRANKLIN COUNTY...
    
At 1024 AM EDT, a severe thunderstorm capable of producing a tornado 
was located 5 miles southeast of Apalachicola, moving northwest 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 dangerous storm will be near...
  Apalachicola around 1040 AM EDT. 

Other locations impacted by this tornadic thunderstorm include
Apalachicola Airport.

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 2970 8513 2977 8497 2967 8490 2965 8494
TIME...MOT...LOC 1424Z 132DEG 18KT 2968 8495 

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

$$

38-GODSEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 7:09 AM EDT	Special Marine Warning	TAE		96 min
Jun 20, 9:30 AM EDT	Special Marine Warning	TAE		60 min
Jun 20, 9:47 AM EDT	Special Marine Warning	TAE		58 min
Jun 20, 10:36 AM EDT	Special Marine Warning	TAE		54 min
Jun 20, 10:44 AM EDT	Tornado Warning	TAE	Franklin, Gulf	31 min
Jun 20, 11:26 AM EDT	Special Marine Warning	TAE		94 min
Jun 20, 12:43 PM EDT	Special Marine Warning	TAE		62 min

Nearby

Tornado Warnings in Florida, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.