Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Atlanta, GA

July 20, 2021Newton County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 20, 2021, 3:54 PM EDT for Newton County, Georgia. It was in force for 36 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 20, 2021, 3:54 PM EDT (19:54 UTC)
Expired
Jul 20, 2021, 4:30 PM EDT
In force
36 min
Issued by
NWS Atlanta, GA
Wind
40

County Newton County, GA

The radar

The Atlanta radar (KFFC), 67 km from the middle of the area, began a volume at 19:57 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

Birmingham, AL (KBMX), launched 12:00Z, 7.9 hours before the alert went out and 273 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, Birmingham, AL at 12:00Z on 2021-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 690 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, Birmingham, AL at 12:00Z on 2021-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.193958Sfc1 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
690 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
524 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

650 
WWUS82 KFFC 201954
SPSFFC

Special Weather Statement
National Weather Service Peachtree City GA
354 PM EDT Tue Jul 20 2021
 
GAZ048-057>059-202030-
Butts GA-Jasper GA-Newton GA-Henry GA-
354 PM EDT Tue Jul 20 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN BUTTS...NORTHWESTERN
JASPER...SOUTHERN NEWTON AND EASTERN HENRY COUNTIES UNTIL 430 PM
EDT...

At 354 PM EDT...a strong thunderstorm was over Rocky Plains, or 9
miles southwest of Covington...moving east at 15 mph.

  HAZARD...Winds up to 40 mph 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
Porterdale, Newborn, Mansfield, Stewart, Eudora, North Alcovy,
Starrsville and Rocky Plains.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. Motorists should
slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3342 8397 3358 8398 3355 8370 3341 8367
      3338 8385
TIME...MOT...LOC 1954Z 286DEG 14KT 3347 8392 

WIND...40MPH

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 9:37 PM EDTSpecial Weather StatementFFCCoweta53 min
Jul 19, 10:07 PM EDTFlash Flood WarningFFCCoweta, Heard, Troup6 hr
Jul 19, 10:13 PM EDTFlash Flood WarningFFCClayton, DeKalb, Fulton6 hr
Jul 19, 10:22 PM EDTRiver Flood WarningFFCDeKalb4 hr
Jul 19, 10:31 PM EDTRiver Flood WarningFFCDeKalb2 hr
Jul 19, 11:09 PM EDTRiver Flood WarningFFCDeKalb98 min
Jul 20, 3:21 AM EDTFlash Flood WatchFFCBanks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 39 more19 hr
Jul 20, 1:45 PM EDTSpecial Weather StatementFFCHancock30 min
Jul 20, 4:22 PM EDTSpecial Weather StatementFFCMorgan23 min
Jul 20, 5:01 PM EDTSpecial Weather StatementFFCWilkes44 min
Jul 20, 5:40 PM EDTSpecial Weather StatementFFCMeriwether, Troup35 min
Jul 20, 5:55 PM EDTSpecial Weather StatementFFCBibb35 min
Jul 20, 7:17 PM EDTFlash Flood WarningFFCCarroll, Haralson6 hr
Jul 20, 7:41 PM EDTSpecial Weather StatementFFCLamar, Pike49 min
Jul 20, 7:57 PM EDTSpecial Weather StatementFFCJohnson48 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.