Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 117, NWS Atlanta, GA

July 30, 2021Murray County, Whitfield County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 30, 2021, 4:39 PM EDT for Murray County, Whitfield County, Georgia. It was in force for 36 min. 2 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: Jul 30, 2021, 4:39 PM EDT (20:39 UTC)
Expired: Jul 30, 2021, 5:15 PM EDT
In force: 36 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Murray County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 119 km from the middle of the area, began a volume at 20:40 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 30, 4:55 PM EDT	TSTM WND DMG	1 Ene Dalton, GA	REPORTS OF MULTIPLE TREES DOWNED ONTO ROADWAYS ON THE EASTERN SIDE OF THE CITY OF DALTON
Jul 30, 4:57 PM EDT	TSTM WND DMG	1 E Dalton, GA	SEVERAL REPORTS OF TREES DOWNED ONTO STRUCTURES ON THE EASTERN SIDE OF THE CITY OF DALTON

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.7 hours before the alert went out and 151 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: 1065 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1141 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

723 
WUUS52 KFFC 302039
SVRFFC
GAC213-313-302115-
/O.NEW.KFFC.SV.W.0117.210730T2039Z-210730T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
439 PM EDT Fri Jul 30 2021

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Murray County in northwestern Georgia...
  Eastern Whitfield County in northwestern Georgia...

* Until 515 PM EDT.

* At 438 PM EDT, a severe thunderstorm was located over Dawnville, or
  near Dalton, moving southeast at 15 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Dalton, Chatsworth, Varnell, Eton, Tunnel Hill, Crandall, Sumac,
  Ramhurst, Rocky Face, Tilton, Beaverdale, Dawnville, Fort Mountain
  State Park and North Georgia Speedway.

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 3495 8481 3475 8464 3473 8466 3465 8465
      3462 8472 3462 8474 3461 8475 3461 8486
      3462 8486 3462 8491 3463 8491 3463 8493
      3484 8505
TIME...MOT...LOC 2038Z 328DEG 11KT 3483 8490 

HAIL...0.75IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 2:50 PM EDT	Heat Advisory	FFC	Baldwin, Barrow, Bibb, Bleckley, Butts, Chattahoochee and 61 more	29 hr
Jul 30, 4:32 PM EDT	Special Weather Statement	FFC	Catoosa, Murray, Whitfield	28 min
Jul 30, 4:45 PM EDT	Special Weather Statement	FFC	Cherokee	30 min
Jul 30, 5:15 PM EDT	Severe Thunderstorm Warning	FFC	Gilmer, Gordon, Murray	30 min
Jul 30, 5:18 PM EDT	Special Weather Statement	FFC	Cherokee	27 min
Jul 30, 6:10 PM EDT	Special Weather Statement	FFC	Dawson, Forsyth	35 min
Jul 30, 6:20 PM EDT	Special Weather Statement	FFC	Bartow	25 min
Jul 30, 6:49 PM EDT	Special Weather Statement	FFC	Bartow	26 min
Jul 30, 7:02 PM EDT	Special Weather Statement	FFC	Cobb, Fulton	28 min
Jul 30, 7:17 PM EDT	Special Weather Statement	FFC	Bartow, Paulding	28 min
Jul 30, 7:40 PM EDT	Special Weather Statement	FFC	Dade	35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.