Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 76, NWS Tallahassee, FL

June 21, 2017Franklin County, Gulf County, Florida

NWS Tallahassee, FL issued this tornado warning at Jun 21, 2017, 12:50 AM EDT for Franklin County, Gulf County, Florida. It was in force for 23 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
Jun 21, 2017, 12:50 AM EDT (04:50 UTC)
Expired
Jun 21, 2017, 1:13 AM EDT
In force
23 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Franklin County, FL, Gulf County, FL

The radar

The Tallahassee radar (KTLH), 114 km from the middle of the area, began a volume at 04:49 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 watch it was issued in

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

IssuedProductOfficeLasted
Jun 20, 11:24 PM EDTTornado WatchSPC12 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 4.8 hours before the alert went out and 116 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 00:00Z on 2017-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 439 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 00:00Z on 2017-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 173 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
439 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
713 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
173 m²/s²
0-3 km storm-relative helicity
249 m²/s²
Significant tornado parameter
0.3
Supercell composite
4.8

Open this sounding in Storm Lab

The text

As transmitted.

258 
WFUS52 KTAE 210450
TORTAE
FLC037-045-210545-
/O.NEW.KTAE.TO.W.0076.170621T0450Z-170621T0545Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tallahassee FL
1250 AM EDT WED JUN 21 2017

The National Weather Service in Tallahassee has issued a

* Tornado Warning for...
  Southeastern Gulf County in the Panhandle of Florida...
  Southwestern Franklin County in Big Bend of Florida...

* Until 145 AM EDT/1245 AM CDT/
    
* At 1250 AM EDT/1150 PM CDT/, a severe thunderstorm capable of
  producing a tornado was located 11 miles southwest of 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 1215 AM CDT. 

Other locations impacted by this tornadic thunderstorm include Nine
Mile, Bay City, Eleven Mile, Thirteen Mile, Apalachicola Airport,
Odena, Indian Pass, Simmons Bayou, Tilton and Jones Homestead.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 2960 8521 2977 8533 2984 8506 2956 8494
      2953 8508
TIME...MOT...LOC 0450Z 150DEG 18KT 2958 8503 

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

$$

42-DVD
2 follow-up statements
207 
WWUS52 KTAE 210502
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
102 AM EDT WED JUN 21 2017

FLC037-045-210545-
/O.CON.KTAE.TO.W.0076.000000T0000Z-170621T0545Z/
Gulf FL-Franklin FL-
102 AM EDT WED JUN 21 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 145 AM EDT/1245 AM CDT/
FOR SOUTHEASTERN GULF AND SOUTHWESTERN FRANKLIN COUNTIES...
    
At 102 AM EDT/1202 AM CDT/, a severe thunderstorm capable of
producing a tornado was located 10 miles southwest 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 1215 AM CDT. 

Other locations impacted by this tornadic thunderstorm include Nine
Mile, Bay City, Eleven Mile, Thirteen Mile, Apalachicola Airport,
Odena, Tilton, Jones Homestead and Simmons Bayou.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 2961 8511 2977 8533 2984 8506 2961 8497
      2959 8508
TIME...MOT...LOC 0502Z 150DEG 19KT 2964 8507 

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

$$

42-DVD
514 
WWUS52 KTAE 210513
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
113 AM EDT WED JUN 21 2017

FLC037-045-210523-
/O.CAN.KTAE.TO.W.0076.000000T0000Z-170621T0545Z/
Gulf FL-Franklin FL-
113 AM EDT WED JUN 21 2017

...THE TORNADO WARNING FOR SOUTHEASTERN GULF AND SOUTHWESTERN
FRANKLIN 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.

A tornado watch remains in effect until 1100 AM EDT/1000 AM CDT/ for
Big Bend of and the Panhandle of Florida.

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

LAT...LON 2961 8511 2977 8533 2984 8506 2961 8497
      2959 8508
TIME...MOT...LOC 0512Z 150DEG 18KT 2969 8510 

$$

42-DVD

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 8:22 PM EDTTornado WarningTAECalhoun, Gulf, Liberty27 min
Jun 20, 8:29 PM EDTTornado WarningTAEBay, Calhoun, Jackson, Washington29 min
Jun 20, 8:37 PM EDTSpecial Marine WarningTAE83 min
Jun 20, 9:41 PM EDTTornado WarningTAEBay, Calhoun19 min
Jun 20, 10:02 PM EDTSpecial Marine WarningTAE58 min
Jun 20, 11:00 PM EDTSpecial Marine WarningTAE2 hr
Jun 21, 12:55 AM EDTSpecial Marine WarningTAE2 hr
Jun 21, 1:27 AM EDTSpecial Marine WarningTAE2 hr
Jun 21, 3:24 AM EDTSpecial Marine WarningTAE2 hr
Jun 21, 5:23 AM EDTSpecial Marine WarningTAE2 hr
Jun 21, 7:26 AM EDTSpecial Marine WarningTAE94 min
Jun 21, 8:57 AM EDTSpecial Marine WarningTAE93 min
Jun 21, 9:57 AM EDTFlash Flood WarningTAEBay3 hr
Jun 21, 10:25 AM EDTSpecial Marine WarningTAE95 min
Jun 21, 10:52 AM EDTFlash Flood WarningTAEBay, Walton, Washington3 hr
Jun 21, 12:28 PM EDTFlash Flood WarningTAEHolmes, Jackson, Washington3 hr
Jun 21, 1:03 PM EDTTornado WarningTAEJackson15 min

Nearby

Tornado Warnings in Florida, 2017Every tornado warning in 2017Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.