Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 176, NWS Tallahassee, FL

June 29, 2021Jefferson County, Madison County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jun 29, 2021, 4:18 PM EDT for Jefferson County, Madison County, Florida. It was in force for 42 min. 6 reports 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 29, 2021, 4:18 PM EDT (20:18 UTC)
Expired: Jun 29, 2021, 5:00 PM EDT
In force: 42 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Jefferson County, FL, Madison County, FL

The radar

The Tallahassee radar (KTLH), 41 km from the middle of the area, began a volume at 20:20 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 29, 4:23 PM EDT	TSTM WND DMG	5 Se Aucilla, FL	HAM RADIO OPERATOR REPORTED A TREE WAS KNOCKED DOWN AND BLOCKING A PORTION OF SW OVERSTREET.
Jun 29, 4:35 PM EDT	TSTM WND DMG	2 Ssw Aucilla, FL	911 DISPATCH REPORTED A TREE DOWN ALONG I-10.
Jun 29, 4:35 PM EDT	TSTM WND DMG	Aucilla, FL	TREE REPORTED DOWN NEAR S. SALT RD AND RAILROAD.
Jun 29, 4:39 PM EDT	TSTM WND DMG	1 Ene Casa Blanco, FL	FALLEN TREES OR LIMBS RESULTED IN A POWER OUTAGE NEAR HIGHWAY 19 AND WAUKEENAH HIGHWAY AS REPORTED ON THE DUKE ENERGY OUTAGE WEBSITE.
Jun 29, 4:45 PM EDT	TSTM WND DMG	2 Ene Monticello, FL	FALLEN TREES AND LIMBS RESULTED IN A POWER OUTAGE NEAR ASHVILLE HIGHWAY AND CLARK ROAD AS REPORTED ON THE DUKE ENERGY OUTAGE WEBSITE.
Jun 29, 4:50 PM EDT	TSTM WND DMG	1 Nne Lois, FL	FALLEN TREES OR LIMBS RESULTED IN A POWER OUTAGE NEAR HIGHWAY 90 AND OLD LLOYD ROAD AS REPORTED ON THE DUKE ENERGY OUTAGE WEBSITE.

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, 8.3 hours before the alert went out and 38 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: 990 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 892 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

480 
WUUS52 KTAE 292018
SVRTAE
FLC065-079-292100-
/O.NEW.KTAE.SV.W.0176.210629T2018Z-210629T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
418 PM EDT Tue Jun 29 2021

The National Weather Service in Tallahassee has issued a

* Severe Thunderstorm Warning for...
  Northwestern Jefferson County in Big Bend of Florida...
  Southwestern Madison County in Big Bend of Florida...

* Until 500 PM EDT.

* At 418 PM EDT, a severe thunderstorm was located 15 miles southeast
  of Monticello, moving west at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Monticello, Cody, Ebb, Lamont, Aucilla, Capps, Lois, Eridu, Nash,
  Thomas City, Drifton, Casa Blanco, Waukeenah, Montivilla, Wacissa,
  Lloyd, Wacissa Springs, Sirmans and Lake Miccosukee.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3030 8365 3030 8382 3031 8385 3031 8389
      3034 8408 3044 8407 3046 8404 3052 8404
      3052 8398 3055 8399 3055 8398 3057 8400
      3059 8400 3057 8387 3043 8362
TIME...MOT...LOC 2018Z 100DEG 18KT 3036 8373 

HAIL...<.75IN
WIND...60MPH
 
$$

42-DVD

1 follow-up statement

248 
WWUS52 KTAE 292052
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
452 PM EDT Tue Jun 29 2021

FLC065-079-292102-
/O.EXP.KTAE.SV.W.0176.000000T0000Z-210629T2100Z/
Jefferson FL-Madison FL-
452 PM EDT Tue Jun 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN JEFFERSON AND
SOUTHWESTERN MADISON COUNTIES WILL EXPIRE AT 500 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

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

LAT...LON 3030 8365 3030 8382 3031 8385 3031 8389
      3034 8408 3044 8407 3046 8404 3052 8404
      3052 8398 3055 8399 3055 8398 3057 8400
      3059 8400 3057 8387 3043 8362
TIME...MOT...LOC 2052Z 100DEG 18KT 3039 8392 

$$

42-DVD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 8:18 PM EDT	Special Weather Statement	TAE	Bay	27 min
Jun 28, 8:20 PM EDT	Special Marine Warning	TAE		26 min
Jun 29, 1:37 PM EDT	Special Weather Statement	TAE	Walton	53 min
Jun 29, 2:12 PM EDT	Special Weather Statement	TAE	Dixie, Lafayette	63 min
Jun 29, 2:16 PM EDT	Special Weather Statement	TAE	Washington	44 min
Jun 29, 2:19 PM EDT	Severe Thunderstorm Warning	TAE	Holmes, Walton	26 min
Jun 29, 2:28 PM EDT	Severe Thunderstorm Warning	TAE	Dixie	32 min
Jun 29, 2:54 PM EDT	Special Marine Warning	TAE		96 min
Jun 29, 3:11 PM EDT	Severe Thunderstorm Warning	TAE	Dixie, Lafayette, Taylor	55 min
Jun 29, 3:32 PM EDT	Special Weather Statement	TAE	Madison	43 min
Jun 29, 3:47 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Taylor	73 min
Jun 29, 4:15 PM EDT	Special Weather Statement	TAE	Jefferson	45 min
Jun 29, 4:25 PM EDT	Special Marine Warning	TAE		65 min
Jun 29, 4:49 PM EDT	Special Weather Statement	TAE	Wakulla	41 min
Jun 29, 7:28 PM EDT	Special Weather Statement	TAE	Gulf	47 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021 Every severe thunderstorm warning in 2021

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.