Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 34, NWS Atlanta, GA

April 9, 2021Chattooga County, Dade County, Walker County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 9, 2021, 3:57 PM EDT for Chattooga County, Dade County, Walker County, Georgia. It was in force for 33 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
Apr 9, 2021, 3:57 PM EDT (19:57 UTC)
Expired
Apr 9, 2021, 4:30 PM EDT
In force
33 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Chattooga County, GA, Dade County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 62 km from the middle of the area, began a volume at 20:00 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, 8.0 hours before the alert went out and 175 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 2021-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 503 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 2021-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.1939587897Sfc1 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
503 J/kg
Mixed-layer CIN
-93 J/kg
Mixed-layer LCL
908 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

197 
WUUS52 KFFC 091957
SVRFFC
GAC055-083-295-092030-
/O.NEW.KFFC.SV.W.0034.210409T1957Z-210409T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
357 PM EDT Fri Apr 9 2021

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Southwestern Walker County in northwestern Georgia...
  Southwestern Dade County in northwestern Georgia...
  Northwestern Chattooga County in northwestern Georgia...

* Until 430 PM EDT.

* At 356 PM EDT, a severe thunderstorm was located over Mentone, or
  12 miles northeast of Fort Payne, moving northeast at 25 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Lafayette, Menlo, Center Post, Rising Fawn, Linwood, Cloudland,
  Cloudland Canyon State Park and Cooper Heights.

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 3487 8548 3471 8522 3447 8550 3476 8556
TIME...MOT...LOC 1956Z 217DEG 22KT 3457 8556 

HAIL...1.00IN
WIND...60MPH
 
$$
1 follow-up statement
966 
WWUS52 KFFC 092021
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
421 PM EDT Fri Apr 9 2021

GAC055-083-295-092031-
/O.EXP.KFFC.SV.W.0034.000000T0000Z-210409T2030Z/
Walker GA-Dade GA-Chattooga GA-
421 PM EDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WALKER...
SOUTHWESTERN DADE AND NORTHWESTERN CHATTOOGA COUNTIES WILL EXPIRE AT
430 PM EDT...
                
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 will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

LAT...LON 3487 8548 3471 8522 3447 8550 3476 8556
TIME...MOT...LOC 2021Z 217DEG 22KT 3467 8546 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 8, 9:11 PM EDTSpecial Weather StatementFFCWhite34 min
Apr 9, 9:11 AM EDTSpecial Weather StatementFFCStewart34 min
Apr 9, 9:44 AM EDTSpecial Weather StatementFFCStewart46 min
Apr 9, 3:44 PM EDTSpecial Weather StatementFFCChattooga31 min
Apr 9, 4:35 PM EDTSpecial Weather StatementFFCCatoosa, Walker25 min
Apr 9, 4:37 PM EDTSpecial Weather StatementFFCGordon38 min
Apr 9, 4:51 PM EDTSevere Thunderstorm WarningFFCMurray, Whitfield24 min
Apr 9, 5:12 PM EDTSevere Thunderstorm WarningFFCMurray14 min
Apr 9, 5:20 PM EDTSpecial Weather StatementFFCCatoosa25 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.