Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 108, NWS Atlanta, GA

July 16, 20214 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 16, 2021, 1:46 PM EDT for 4 counties in Georgia. It was in force for 19 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 16, 2021, 1:46 PM EDT (17:46 UTC)
Expired
Jul 16, 2021, 2:05 PM EDT
In force
19 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Greene County, GA, Morgan County, GA, Oconee County, GA, Walton County, GA

The radar

The Atlanta radar (KFFC), 102 km from the middle of the area, began a volume at 17:47 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, 5.8 hours before the alert went out and 96 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 12:00Z on 2021-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 926 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 12:00Z on 2021-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
926 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
923 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
-5 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

942 
WUUS52 KFFC 161746
SVRFFC
GAC133-211-219-297-161830-
/O.NEW.KFFC.SV.W.0108.210716T1746Z-210716T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
146 PM EDT Fri Jul 16 2021

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  South central Oconee County in northeastern Georgia...
  Northern Morgan County in north central Georgia...
  Southeastern Walton County in north central Georgia...
  Western Greene County in east central Georgia...

* Until 230 PM EDT.

* At 145 PM EDT, a severe thunderstorm was located over Hard Labor
  Creek State Park, or 8 miles northwest of Madison, moving northeast
  at 10 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Rutledge, North High Shoals, Bostwick, Bishop, Ebenezer, Hard Labor
  Creek State Park, Farmington and Apalachee.

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 3359 8360 3371 8368 3386 8346 3365 8331
TIME...MOT...LOC 1745Z 244DEG 9KT 3368 8358 

HAIL...1.00IN
WIND...<50MPH
 
$$
1 follow-up statement
375 
WWUS52 KFFC 161805
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
205 PM EDT Fri Jul 16 2021

GAC133-211-219-297-161815-
/O.CAN.KFFC.SV.W.0108.000000T0000Z-210716T1830Z/
Oconee GA-Morgan GA-Walton GA-Greene GA-
205 PM EDT Fri Jul 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL OCONEE...
NORTHERN MORGAN...SOUTHEASTERN WALTON AND WESTERN GREENE COUNTIES IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 3359 8360 3371 8368 3386 8346 3365 8331
TIME...MOT...LOC 1804Z 244DEG 9KT 3370 8353 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 8:02 PM EDTSpecial Weather StatementFFCGlascock, Taliaferro, Warren43 min
Jul 16, 1:30 PM EDTSpecial Weather StatementFFCTaliaferro, Wilkes30 min
Jul 16, 1:35 PM EDTSpecial Weather StatementFFCMorgan25 min
Jul 16, 1:58 PM EDTSpecial Weather StatementFFCWilkes32 min
Jul 16, 2:24 PM EDTSpecial Weather StatementFFCWarren36 min
Jul 16, 4:30 PM EDTSpecial Weather StatementFFCHancock30 min
Jul 16, 5:55 PM EDTSpecial Weather StatementFFCBaldwin35 min
Jul 16, 7:16 PM EDTSpecial Weather StatementFFCTreutlen29 min
Jul 16, 7:28 PM EDTSpecial Weather StatementFFCEmanuel32 min
Jul 16, 7:36 PM EDTSpecial Weather StatementFFCHall24 min
Jul 16, 7:56 PM EDTSpecial Weather StatementFFCTreutlen34 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2021Every 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.