Alert archive / Florida / Tornado Warnings in 2018

Tornado Warning 20, NWS Tallahassee, FL

July 21, 2018Gadsden County, Leon County, Florida; Grady County, Georgia

NWS Tallahassee, FL issued this tornado warning at Jul 21, 2018, 1:02 PM EDT for Gadsden County, Leon County, Florida; Grady County, Georgia. It was in force for 28 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: Jul 21, 2018, 1:02 PM EDT (17:02 UTC)
Expired: Jul 21, 2018, 1:30 PM EDT
In force: 28 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Gadsden County, FL, Leon County, FL, Grady County, GA

The radar

The Tallahassee radar (KTLH), 30 km from the middle of the area, began a volume at 17:06 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
Jul 21, 1:30 PM EDT	TSTM WND DMG	3 Ese Killearn Estates, FL	TREE DOWN ON POWER LINES AT 6303 MICCOSUKEE ROAD. REPORTED VIA TWITTER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 21, 11:12 AM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 5.0 hours before the alert went out and 30 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: 1280 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 852 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

961 
WFUS52 KTAE 211702
TORTAE
FLC039-073-GAC131-211730-
/O.NEW.KTAE.TO.W.0020.180721T1702Z-180721T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tallahassee FL
102 PM EDT SAT JUL 21 2018

The National Weather Service in Tallahassee has issued a

* Tornado Warning for...
  Northeastern Gadsden County in Big Bend of Florida...
  Northeastern Leon County in Big Bend of Florida...
  Southwestern Grady County in southwestern Georgia...

* Until 130 PM EDT.
    
* At 102 PM EDT, a severe thunderstorm capable of producing a tornado
  was located 10 miles south of Whigham, or 10 miles southwest of
  Cairo, moving south at 40 mph.

  HAZARD...Tornado and quarter size hail.

  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...
  Tallahassee around 130 PM EDT.

Other locations impacted by this tornadic thunderstorm include Macon
Community Park, Lake Iamonia, Tallahassee Memorial Hosp, Baum, Maclay
State Gardens, Rocky Hill, Killearn Lakes, Iamonia, Calvary and
Moccasin Gap.

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 3079 8438 3082 8424 3049 8406 3044 8427
TIME...MOT...LOC 1702Z 343DEG 36KT 3074 8428 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

11-NGUYEN

1 follow-up statement

606 
WWUS52 KTAE 211721
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
121 PM EDT SAT JUL 21 2018

FLC039-073-GAC131-211730-
/O.EXP.KTAE.TO.W.0020.000000T0000Z-180721T1730Z/
Gadsden FL-Leon FL-Grady GA-
121 PM EDT SAT JUL 21 2018

...THE TORNADO WARNING FOR NORTHEASTERN GADSDEN...NORTHEASTERN LEON
AND SOUTHWESTERN GRADY COUNTIES WILL EXPIRE AT 130 PM EDT...
                
The storm which prompted the warning has no longer appears capable 
of producing a tornado.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
Big Bend of Florida...and southwestern Georgia.

Remember, a Severe Thunderstorm Warning still remains in effect for
Grady, Gadsden, and Leon counties.

LAT...LON 3079 8438 3082 8424 3049 8406 3044 8427
TIME...MOT...LOC 1720Z 343DEG 36KT 3057 8422 

$$

11-Nguyen

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 12:10 PM EDT	Severe Thunderstorm Warning	TAE	Gadsden	50 min
Jul 21, 12:48 PM EDT	Severe Thunderstorm Warning	TAE	Calhoun, Gadsden, Gulf, Leon, Liberty, Wakulla	42 min
Jul 21, 12:54 PM EDT	Severe Thunderstorm Warning	TAE	Gadsden, Jefferson, Leon, Madison, Wakulla	51 min
Jul 21, 1:14 PM EDT	Special Marine Warning	TAE		91 min
Jul 21, 1:40 PM EDT	Severe Thunderstorm Warning	TAE	Gadsden, Jefferson, Leon, Madison, Taylor, Wakulla	65 min
Jul 21, 1:43 PM EDT	Special Marine Warning	TAE		62 min
Jul 21, 2:12 PM EDT	Severe Thunderstorm Warning	TAE	Franklin, Gulf	33 min
Jul 21, 2:35 PM EDT	Special Marine Warning	TAE		115 min
Jul 21, 2:39 PM EDT	Severe Thunderstorm Warning	TAE	Dixie, Lafayette, Taylor	66 min
Jul 21, 3:43 PM EDT	Special Weather Statement	TAE	Dixie	47 min
Jul 21, 4:13 PM EDT	Small Craft Advisory	TAE		36 hr
Jul 21, 10:27 AM EDT	Special Weather Statement	TAE	Calhoun, Dougherty, Randolph, Terrell	63 min
Jul 21, 10:34 AM EDT	Special Weather Statement	TAE	Ben Hill, Irwin	41 min
Jul 21, 10:46 AM EDT	Special Weather Statement	TAE	Lee, Turner, Worth	44 min
Jul 21, 10:55 AM EDT	Severe Thunderstorm Warning	TAE	Baker, Dougherty, Lee, Mitchell, Terrell, Worth	65 min
Jul 21, 11:12 AM EDT	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Dougherty, Lee, Randolph, Terrell	48 min
Jul 21, 11:25 AM EDT	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Clay, Decatur, Dougherty, Early and 4 more	50 min
Jul 21, 11:56 AM EDT	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Colquitt, Dougherty, Grady, Mitchell and 1 more	64 min

Nearby

Tornado Warnings in Florida, 2018 Tornado Warnings in Georgia, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.