Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Atlanta, GA

July 11, 20215 counties in Georgia

NWS Atlanta, GA issued this special weather statement at Jul 11, 2021, 7:46 PM EDT for 5 counties in Georgia. It was in force for 44 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 11, 2021, 7:46 PM EDT (23:46 UTC)
Expired: Jul 11, 2021, 8:30 PM EDT
In force: 44 min
Issued by: NWS Atlanta, GA
Wind: 40

Counties Catoosa County, GA, Chattooga County, GA, Dade County, GA, Walker County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 93 km from the middle of the area, began a volume at 23:46 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, 11.8 hours before the alert went out and 156 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: 51 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 659 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -4 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.

223 
WWUS82 KFFC 112346
SPSFFC

Special Weather Statement
National Weather Service Peachtree City GA
746 PM EDT Sun Jul 11 2021
 
GAZ001>004-011-120030-
Chattooga GA-Whitfield GA-Catoosa GA-Walker GA-Dade GA-
746 PM EDT Sun Jul 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR CHATTOOGA...WHITFIELD...
CATOOSA...WALKER AND DADE COUNTIES UNTIL 830 PM EDT...

At 745 PM EDT...a strong thunderstorm was near Linwood, or near
Lafayette...moving northeast at 30 mph.

  HAZARD...Up to 40 mph wind...frequent cloud to ground lightning 
           and heavy rain.

  IMPACT...Expect minor damage to tree limbs and blowing around of 
           light...unsecured objects. Heavy rain may cause temporary 
           street flooding especially in poor drainage areas.

Some locations in the path of this storm include
Dalton, Lafayette, Summerville, Ringgold, Trenton, Fort Oglethorpe,
Rossville, Chickamauga, Trion, Varnell, Lookout Mountain, Tunnel
Hill, Cohutta, Lyerly, Menlo, Center Post, Subligna, Blue Spring,
Fairview and Linwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning. Motorists
should slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3499 8486 3468 8496 3462 8505 3462 8506
      3460 8506 3459 8508 3459 8511 3454 8513
      3429 8546 3498 8560
TIME...MOT...LOC 2345Z 209DEG 26KT 3473 8535 

WIND...40MPH

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 1:54 PM EDT	Special Weather Statement	FFC	Chattahoochee	36 min
Jul 11, 1:56 PM EDT	Special Weather Statement	FFC	Muscogee	64 min
Jul 11, 2:13 PM EDT	Special Weather Statement	FFC	Schley	32 min
Jul 11, 2:48 PM EDT	Special Weather Statement	FFC	Macon, Schley, Taylor, Webster	27 min
Jul 11, 3:01 PM EDT	Special Weather Statement	FFC	Warren	29 min
Jul 11, 3:20 PM EDT	Special Weather Statement	FFC	Macon, Schley	25 min
Jul 11, 4:29 PM EDT	Special Weather Statement	FFC	Johnson	46 min
Jul 11, 5:06 PM EDT	Special Weather Statement	FFC	Candler	24 min
Jul 11, 5:36 PM EDT	Special Weather Statement	FFC	Emanuel	24 min

Nearby

Special Weather Statements in Georgia, 2021 Every special weather statement 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.