Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 111, NWS Atlanta, GA

July 23, 2021Houston County, Twiggs County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 23, 2021, 1:33 PM EDT for Houston County, Twiggs County, Georgia. It was in force for 42 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: Jul 23, 2021, 1:33 PM EDT (17:33 UTC)
Expired: Jul 23, 2021, 2:15 PM EDT
In force: 42 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Houston County, GA, Twiggs County, GA

The radar

The Robins AFB radar (KJGX), 27 km from the middle of the area, began a volume at 17:37 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 5.6 hours before the alert went out and 114 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: 158 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 1211 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

262 
WUUS52 KFFC 231733
SVRFFC
GAC153-289-231815-
/O.NEW.KFFC.SV.W.0111.210723T1733Z-210723T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
133 PM EDT Fri Jul 23 2021

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Southwestern Twiggs County in central Georgia...
  Northeastern Houston County in central Georgia...

* Until 215 PM EDT.

* At 133 PM EDT, a severe thunderstorm was located over Robins Air
  Force Base, or 13 miles northeast of Perry, and is nearly
  stationary.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Warner Robins, Centerville, Robins Air Force Base, Bullard,
  Elberta, Bonaire and Huber.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If you see wind damage...hail or flooding...wait until the storm has
passed...and then call the National Weather Service toll free
at 1 8 6 6 7 6 3 4 4 6 6 or tweet us your report at NWSATLANTA.

&&

LAT...LON 3259 8372 3261 8371 3265 8373 3265 8371
      3269 8370 3268 8367 3266 8360 3269 8360
      3269 8359 3272 8357 3274 8349 3257 8345
      3250 8364
TIME...MOT...LOC 1733Z 154DEG 4KT 3261 8359 

HAIL...1.00IN
WIND...60MPH
 
$$

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 23, 12:59 PM EDT	Special Weather Statement	FFC	Twiggs	31 min
Jul 23, 1:58 PM EDT	Special Weather Statement	FFC	Houston	32 min
Jul 23, 2:29 PM EDT	Special Weather Statement	FFC	Dooly	31 min
Jul 23, 2:33 PM EDT	Special Weather Statement	FFC	Bibb	27 min
Jul 23, 2:56 PM EDT	Special Weather Statement	FFC	Wilcox	34 min
Jul 23, 3:36 PM EDT	Special Weather Statement	FFC	Jones	24 min
Jul 23, 4:04 PM EDT	Severe Thunderstorm Warning	FFC	Lamar, Pike, Upson	41 min
Jul 23, 4:12 PM EDT	Special Weather Statement	FFC	Forsyth	33 min
Jul 23, 5:11 PM EDT	Special Weather Statement	FFC	DeKalb	34 min
Jul 23, 5:26 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Fulton	34 min
Jul 23, 5:51 PM EDT	Special Weather Statement	FFC	DeKalb	24 min
Jul 23, 6:07 PM EDT	Special Weather Statement	FFC	DeKalb	38 min
Jul 23, 6:10 PM EDT	Special Weather Statement	FFC	Forsyth	35 min
Jul 23, 6:22 PM EDT	Flash Flood Warning	FFC	DeKalb, Fulton	4 hr
Jul 23, 6:46 PM EDT	Flash Flood Warning	FFC	DeKalb	4 hr
Jul 23, 7:01 PM EDT	River Flood Warning	FFC	DeKalb	96 min

Nearby

Severe Thunderstorm Warnings in Georgia, 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.