Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 34, NWS Tallahassee, FL

March 18, 2021Houston County, Alabama; Gadsden County, Leon County, Liberty County, Florida; 6 counties in Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Mar 18, 2021, 7:24 AM CDT for Houston County, Alabama; Gadsden County, Leon County, Liberty County, Florida; 6 counties in Georgia. It was in force for 51 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: Mar 18, 2021, 7:24 AM CDT (12:24 UTC)
Expired: Mar 18, 2021, 8:15 AM CDT
In force: 51 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Houston County, AL, Gadsden County, FL, Leon County, FL, Liberty County, FL, Baker County, GA, Decatur County, GA, Grady County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA

The radar

The Tallahassee radar (KTLH), 78 km from the middle of the area, began a volume at 12:22 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.

Issued	Product	Office	Lasted
Mar 17, 11:02 PM CDT	Tornado Watch	SPC	9 hr
Mar 18, 6:53 AM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 0.4 hours before the alert went out and 269 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: 583 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 480 m above ground
0-6 km bulk shear: 83 kt
0-1 km storm-relative helicity: 398 m²/s²
0-3 km storm-relative helicity: 542 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 5.7

Open this sounding in Storm Lab

The text

As transmitted.

423 
WUUS52 KTAE 181224
SVRTAE
ALC069-FLC039-073-077-GAC007-087-131-201-205-253-181315-
/O.NEW.KTAE.SV.W.0034.210318T1224Z-210318T1315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tallahassee FL
824 AM EDT Thu Mar 18 2021

The National Weather Service in Tallahassee has issued a

* Severe Thunderstorm Warning for...
  Southeastern Houston County in southeastern Alabama...
  Northern Gadsden County in Big Bend of Florida...
  Northern Liberty County in Big Bend of Florida...
  Northern Leon County in Big Bend of Florida...
  Decatur County in southwestern Georgia...
  Western Grady County in southwestern Georgia...
  Miller County in southwestern Georgia...
  Southwestern Mitchell County in southwestern Georgia...
  Southwestern Baker County in southwestern Georgia...
  Seminole County in southwestern Georgia...

* Until 915 AM EDT/815 AM CDT/.

* At 823 AM EDT/723 AM CDT/, severe thunderstorms were located along
  a line extending from near Donalsonville to 6 miles northwest of
  Chattahoochee to near Blountstown, moving northeast at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Colquitt, Bainbridge, Donalsonville, Havana, Quincy, Whigham,
  Greensboro, West Bainbridge, Chattahoochee, Gretna, Attapulgus,
  Iron City, Climax, Brinson, Douglas City, Florence, Jamieson,
  Recovery, Harrells Still and Laingkat.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 AM EDT/800 AM CDT/ for
southeastern Alabama...and the Panhandle of Florida. A Tornado Watch
also remains in effect until 100 PM EDT/noon CDT/ for Big Bend of
Florida...and southwestern Georgia.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3111 8431 3060 8426 3055 8498 3058 8496
      3070 8486 3074 8489 3075 8491 3082 8494
      3088 8493 3093 8498 3100 8500 3100 8505
      3105 8505 3108 8503 3107 8492 3119 8492
      3126 8486 3126 8464 3130 8464 3130 8435
TIME...MOT...LOC 1223Z 230DEG 32KT 3104 8496 3077 8492 3050 8500 

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 18, 3:34 AM CDT	Special Weather Statement	TAE	Coffee, Dale, Geneva, Henry	86 min
Mar 18, 4:29 AM CDT	Severe Thunderstorm Warning	TAE	Geneva	61 min
Mar 18, 5:04 AM CDT	Severe Thunderstorm Warning	TAE	Coffee, Dale, Henry, Houston	56 min
Mar 18, 5:26 AM CDT	Tornado Warning	TAE	Dale, Henry, Houston	49 min
Mar 18, 6:01 AM CDT	Severe Thunderstorm Warning	TAE	Henry, Houston	59 min
Mar 18, 6:15 AM CDT	Tornado Warning	TAE	Henry	30 min
Mar 18, 3:18 AM CDT	Special Marine Warning	TAE		3 hr
Mar 18, 3:45 AM CDT	Special Weather Statement	TAE	Holmes, Walton	75 min
Mar 18, 5:40 AM CDT	Severe Thunderstorm Warning	TAE	Bay, Walton, Washington	64 min
Mar 18, 5:44 AM CDT	Special Marine Warning	TAE		3 hr
Mar 18, 6:02 AM CDT	Tornado Warning	TAE	Bay, Washington	28 min
Mar 18, 6:05 AM CDT	Tornado Warning	TAE	Bay, Calhoun, Gulf	40 min
Mar 18, 6:19 AM CDT	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Franklin, Gulf, Holmes, Jackson and 2 more	86 min
Mar 18, 6:48 AM CDT	Tornado Warning	TAE	Bay, Gulf	27 min
Mar 18, 7:19 AM CDT	Severe Thunderstorm Warning	TAE	Calhoun, Franklin, Gadsden, Gulf, Leon, Liberty and 1 more	56 min
Mar 18, 8:08 AM CDT	Special Marine Warning	TAE		2 hr
Mar 18, 8:11 AM CDT	Severe Thunderstorm Warning	TAE	Franklin, Gadsden, Gulf, Jefferson, Leon, Liberty and 1 more	64 min
Mar 18, 9:07 AM CDT	Special Weather Statement	TAE	Jefferson, Wakulla	38 min
Mar 18, 9:52 AM CDT	Special Weather Statement	TAE	Jefferson, Madison	53 min
Mar 18, 10:04 AM CDT	Special Marine Warning	TAE		116 min
Mar 18, 10:49 AM CDT	Special Weather Statement	TAE	Taylor	41 min
Mar 18, 11:36 AM CDT	Special Weather Statement	TAE	Dixie, Lafayette	84 min
Mar 18, 11:55 AM CDT	Special Marine Warning	TAE		110 min
Mar 18, 12:21 PM CDT	Tornado Warning	TAE	Dixie, Lafayette, Taylor	24 min
Mar 18, 12:44 PM CDT	Severe Thunderstorm Warning	TAE	Dixie, Lafayette	31 min
Mar 18, 1:06 PM CDT	Special Weather Statement	TAE	Dixie	39 min
Mar 18, 6:32 AM CDT	Tornado Warning	TAE	Early	43 min
Mar 18, 6:55 AM CDT	Severe Thunderstorm Warning	TAE	Baker, Calhoun, Clay, Dougherty, Early, Quitman and 2 more	65 min
Mar 18, 9:41 AM CDT	Special Weather Statement	TAE	Ben Hill, Berrien, Brooks, Colquitt, Cook, Irwin and 5 more	94 min
Mar 18, 11:12 AM CDT	Special Weather Statement	TAE	Lanier	33 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2021 Severe Thunderstorm Warnings in Florida, 2021 Severe Thunderstorm Warnings in Alabama, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.