Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 309, NWS Atlanta, GA

July 26, 2017Morgan County, Walton County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 26, 2017, 5:31 PM EDT for Morgan County, Walton County, 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 26, 2017, 5:31 PM EDT (21:31 UTC)
Expired
Jul 26, 2017, 6:15 PM EDT
In force
44 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Morgan County, GA, Walton County, GA

The radar

The Atlanta radar (KFFC), 90 km from the middle of the area, began a volume at 21:32 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, 9.5 hours before the alert went out and 84 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 2017-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 752 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 2017-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
752 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
1155 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
42 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

073 
WUUS52 KFFC 262131
SVRFFC
GAC211-297-262215-
/O.NEW.KFFC.SV.W.0309.170726T2131Z-170726T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
531 PM EDT WED JUL 26 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Western Morgan County in north central Georgia...
  Southeastern Walton County in north central Georgia...

* Until 615 PM EDT

* At 531 PM EDT, a severe thunderstorm was located over Bostwick, or
  8 miles northwest of Madison, and is nearly stationary.

  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...
  Madison, Social Circle, Rutledge, Bostwick, Ebenezer, Hard Labor
  Creek State Park 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 3347 8355 3359 8369 3360 8368 3361 8370
      3362 8369 3364 8373 3365 8376 3366 8378
      3376 8356 3367 8339
TIME...MOT...LOC 2131Z 041DEG 4KT 3370 8353 

HAIL...1.00IN
WIND...60MPH
 
$$
1 follow-up statement
133 
WWUS52 KFFC 262151
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
551 PM EDT WED JUL 26 2017

GAC211-297-262215-
/O.CON.KFFC.SV.W.0309.000000T0000Z-170726T2215Z/
Morgan GA-Walton GA-
551 PM EDT WED JUL 26 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHWESTERN MORGAN AND SOUTHEASTERN WALTON COUNTIES...

At 551 PM EDT, a severe thunderstorm was located near Hard Labor
Creek State Park, or 7 miles northwest of Madison, and is nearly
stationary.

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...
Madison, Social Circle, Rutledge, Hard Labor Creek State Park and
Ebenezer.

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 3347 8355 3359 8369 3360 8368 3361 8370
      3362 8369 3364 8373 3365 8376 3366 8378
      3373 8361 3362 8347
TIME...MOT...LOC 2151Z 041DEG 4KT 3368 8355 

HAIL...1.00IN
WIND...60MPH
 
$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 2:15 PM EDTSpecial Weather StatementFFCBaldwin, Putnam30 min
Jul 26, 2:44 PM EDTSpecial Weather StatementFFCJones46 min
Jul 26, 3:33 PM EDTSpecial Weather StatementFFCBibb42 min
Jul 26, 3:48 PM EDTSpecial Weather StatementFFCGlascock42 min
Jul 26, 4:01 PM EDTSpecial Weather StatementFFCHancock, Warren44 min
Jul 26, 4:24 PM EDTSpecial Weather StatementFFCBibb, Peach51 min
Jul 26, 4:31 PM EDTSpecial Weather StatementFFCGlascock44 min
Jul 26, 4:44 PM EDTSevere Thunderstorm WarningFFCCrawford, Houston, Macon, Peach, Taylor, Twiggs46 min
Jul 26, 5:01 PM EDTSpecial Weather StatementFFCGlascock, Greene, Hancock, Jefferson, Taliaferro, Warren44 min
Jul 26, 5:07 PM EDTSevere Thunderstorm WarningFFCGreene, Hancock, Taliaferro38 min
Jul 26, 5:26 PM EDTSpecial Weather StatementFFCTaylor49 min
Jul 26, 6:16 PM EDTSevere Thunderstorm WarningFFCButts, Henry, Jasper, Morgan, Newton44 min
Jul 26, 6:48 PM EDTSpecial Weather StatementFFCSumter, Webster57 min
Jul 26, 7:02 PM EDTSpecial Weather StatementFFCButts43 min
Jul 26, 7:27 PM EDTSpecial Weather StatementFFCCherokee, Pickens48 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2017Every severe thunderstorm warning in 2017

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.