Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Atlanta, GA

August 15, 2021Catoosa County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 15, 2021, 10:14 PM EDT for Catoosa County, Georgia. It was in force for 31 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
Aug 15, 2021, 10:14 PM EDT (02:14 UTC)
Expired
Aug 15, 2021, 10:45 PM EDT
In force
31 min
Issued by
NWS Atlanta, GA
Wind
40

County Catoosa County, GA

The radar

The Northeast Alabama radar (KHTX), 91 km from the middle of the area, began a volume at 02:14 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 00:00Z, 2.2 hours before the alert went out and 177 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2021-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 919 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2021-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
919 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
972 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
31 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

342 
WWUS82 KFFC 160214
SPSFFC

Special Weather Statement
National Weather Service Peachtree City GA
1014 PM EDT Sun Aug 15 2021
 
GAZ003-160245-
Catoosa GA-
1014 PM EDT Sun Aug 15 2021

...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF CATOOSA COUNTY
THROUGH 1045 PM EDT...

At 1013 PM EDT...a strong thunderstorm was over Beaumont, or near
Ringgold...moving north at 15 mph.

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

SOURCE...Radar indicated.

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
Ringgold, Fort Oglethorpe, Boynton, Beaumont, Lakeview, Wood Station,
Indian Springs, Graysville and Blue Spring.

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 3497 8498 3497 8500 3492 8501 3491 8502
      3488 8502 3486 8503 3486 8506 3482 8506
      3481 8512 3482 8513 3477 8515 3477 8520
      3485 8520 3486 8526 3498 8527 3499 8498
TIME...MOT...LOC 0213Z 185DEG 11KT 3484 8516 

MAX HAIL SIZE...
MAX WIND GUST...40MPH

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 9:29 PM EDTSpecial Weather StatementFFCDade61 min
Aug 15, 10:46 PM EDTSpecial Weather StatementFFCCatoosa, Dade, Walker29 min
Aug 15, 11:10 PM EDTSpecial Weather StatementFFCCatoosa, Dade, Walker35 min
Aug 16, 12:08 AM EDTSpecial Weather StatementFFCCatoosa, Chattooga, Floyd, Murray, Walker, Whitfield22 min
Aug 16, 12:11 AM EDTSpecial Weather StatementFFCFannin, Gilmer, Lumpkin, Union34 min
Aug 16, 1:13 AM EDTSpecial Weather StatementFFCTowns, Union32 min
Aug 16, 3:07 AM EDTRiver Flood WarningFFCWhitfield19 min
Aug 16, 4:32 AM EDTFlash Flood WatchFFCBanks, Barrow, Bartow, Bibb, Butts, Carroll and 65 more40 hr
Aug 16, 12:19 PM EDTWind AdvisoryFFCBibb, Butts, Chattahoochee, Clarke, Clayton, Coweta and 35 more19 hr
Aug 16, 3:02 PM EDTSpecial Weather StatementFFCMorgan, Walton28 min

Nearby

Special Weather Statements in Georgia, 2021Every 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.