Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 65, NWS Tallahassee, FL

May 20, 2017Walton County, Florida

NWS Tallahassee, FL issued this tornado warning at May 20, 2017, 11:18 PM CDT for Walton County, Florida. It was in force for 27 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: May 20, 2017, 11:18 PM CDT (04:18 UTC)
Expired: May 20, 2017, 11:45 PM CDT
In force: 27 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Walton County, FL

The radar

The Eglin Afb radar (KEVX), 42 km from the middle of the area, began a volume at 04:19 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 00:00Z, 4.3 hours before the alert went out and 196 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: 48 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 1610 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

251 
WFUS52 KTAE 210418
TORTAE
FLC131-210445-
/O.NEW.KTAE.TO.W.0065.170521T0418Z-170521T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tallahassee FL
1118 PM CDT SAT MAY 20 2017

The National Weather Service in Tallahassee has issued a

* Tornado Warning for...
  Northwestern Walton County in the Panhandle of Florida...

* Until 1145 PM CDT
    
* At 1117 PM CDT, a severe thunderstorm capable of producing a
  tornado was located 9 miles northwest of Eglin Air Force Base, or
  12 miles west of De Funiak Springs, moving east at 25 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...
  Eglin Air Force Base around 1130 PM CDT. 
  De Funiak Springs around 1145 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Oakwood Hills, Cluster Springs, Sand Hill, Pleasant Ridge, Alpine
Heights, Liberty and Mossy Head.

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 3078 8639 3086 8619 3069 8616 3067 8639
TIME...MOT...LOC 0417Z 258DEG 23KT 3073 8634 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

ADL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 10:30 PM CDT	Special Weather Statement	TAE	Holmes, Walton	75 min
May 20, 10:48 PM CDT	Severe Thunderstorm Warning	TAE	Walton	57 min
May 20, 11:26 PM CDT	Special Marine Warning	TAE		2 hr
May 20, 11:39 PM CDT	Severe Thunderstorm Warning	TAE	Holmes, Walton, Washington	66 min
May 21, 12:08 AM CDT	Severe Thunderstorm Warning	TAE	Bay, Holmes, Jackson, Walton, Washington	52 min
May 21, 12:56 AM CDT	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Holmes, Jackson, Washington	49 min
May 21, 1:25 AM CDT	Special Marine Warning	TAE		65 min
May 21, 1:44 AM CDT	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Gulf	61 min
May 21, 2:14 AM CDT	Special Weather Statement	TAE	Jackson	46 min
May 21, 2:31 AM CDT	Special Marine Warning	TAE		119 min
May 21, 2:46 AM CDT	Special Weather Statement	TAE	Calhoun, Gadsden, Liberty	59 min
May 21, 4:26 AM CDT	Special Marine Warning	TAE		2 hr
May 21, 4:35 AM CDT	Special Weather Statement	TAE	Jefferson	40 min
May 21, 5:13 AM CDT	Special Weather Statement	TAE	Madison	47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.