Alert archive / Georgia / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 166, NWS Atlanta, GA

June 18, 2013Walton County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jun 18, 2013, 5:25 PM EDT for Walton County, Georgia. It was in force for 50 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 18, 2013, 5:25 PM EDT (21:25 UTC)
Expired
Jun 18, 2013, 6:15 PM EDT
In force
50 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

County Walton County, GA

The radar

The Atlanta radar (KFFC), 97 km from the middle of the area, began a volume at 21:25 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.

What was reported inside it

TimeReportWhereRemark
Jun 18, 5:35 PM EDTTSTM WND DMGMonroe, GATREES DOWN ALL ACROSS THE COUNTY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.4 hours before the alert went out and 92 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 2013-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 975 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 2013-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
975 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
499 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

675 
WUUS52 KFFC 182125
SVRFFC
GAC297-182215-
/O.NEW.KFFC.SV.W.0166.130618T2125Z-130618T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
525 PM EDT TUE JUN 18 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WALTON COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 615 PM EDT

* AT 519 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL.  THIS
  STORM WAS LOCATED NEAR WALNUT GROVE...MOVING EAST AT 40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  JERSEY...BETWEEN...MONROE AND GOOD HOPE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3391 8364 3389 8362 3388 8359 3385 8357
      3382 8351 3371 8358 3369 8383 3379 8398
      3388 8386 3390 8377 3389 8376 3391 8368
TIME...MOT...LOC 2125Z 255DEG 33KT 3378 8387

$$
2 follow-up statements
008 
WWUS52 KFFC 182147
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
547 PM EDT TUE JUN 18 2013

GAC297-182215-
/O.CON.KFFC.SV.W.0166.000000T0000Z-130618T2215Z/
WALTON GA-
547 PM EDT TUE JUN 18 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR EASTERN WALTON COUNTY...

AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZED HAIL...AND DAMAGING WINDS UP TO 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM GRATIS TO MOUNT VERNON TO
EBENEZER...MOVING EAST AT 40 MPH.

THE LINE OF SEVERE THUNDERSTORMS WILL OTHERWISE REMAIN OVER MAINLY
RURAL AREAS OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3389 8362 3388 8359 3385 8357 3382 8351
      3371 8359 3370 8370 3370 8371 3389 8381
      3390 8377 3389 8376 3391 8368 3391 8364
TIME...MOT...LOC 2147Z 255DEG 33KT 3388 8364 3383 8359
          3373 8355

$$
017 
WWUS52 KFFC 182153
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
553 PM EDT TUE JUN 18 2013

GAC297-182203-
/O.CAN.KFFC.SV.W.0166.000000T0000Z-130618T2215Z/
WALTON GA-
553 PM EDT TUE JUN 18 2013

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WALTON COUNTY IS
CANCELLED...

.

THE THUNDERSTORM HAS WEAKENED AND IS NO LONGER EXPECTED TO PRODUCE
SEVERE WEATHER. HOWEVER...STRONG GUSTY WINDS UP TO 45 MPH...VERY
HEAVY RAIN...AND SMALL HAIL ARE STILL POSSIBLE WITH THIS STORM.

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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

LAT...LON 3389 8362 3388 8359 3385 8357 3382 8351
      3371 8359 3370 8370 3370 8371 3389 8381
      3390 8377 3389 8376 3391 8368 3391 8364
TIME...MOT...LOC 2153Z 255DEG 33KT 3388 8357 3383 8352
          3373 8348

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 8:33 PM EDTSpecial Weather StatementFFCEmanuel27 min
Jun 17, 8:35 PM EDTSpecial Weather StatementFFCHouston25 min
Jun 17, 8:44 PM EDTSpecial Weather StatementFFCJones31 min
Jun 17, 8:55 PM EDTSpecial Weather StatementFFCHouston35 min
Jun 17, 8:57 PM EDTSpecial Weather StatementFFCEmanuel, Treutlen33 min
Jun 17, 9:14 PM EDTSpecial Weather StatementFFCBaldwin, Wilkinson31 min
Jun 17, 9:32 PM EDTSpecial Weather StatementFFCDooly28 min
Jun 18, 5:53 AM EDTSpecial Weather StatementFFCMeriwether, Pike22 min
Jun 18, 7:00 AM EDTSpecial Weather StatementFFCNewton, Oconee, Walton30 min
Jun 18, 7:29 AM EDTSpecial Weather StatementFFCClarke, Morgan, Oconee, Oglethorpe46 min
Jun 18, 12:32 PM EDTSpecial Weather StatementFFCWashington28 min
Jun 18, 1:15 PM EDTSpecial Weather StatementFFCJohnson30 min
Jun 18, 3:05 PM EDTSpecial Weather StatementFFCHancock25 min
Jun 18, 3:17 PM EDTSpecial Weather StatementFFCMontgomery, Wheeler28 min
Jun 18, 3:24 PM EDTSevere Thunderstorm WarningFFCMontgomery, Wheeler36 min
Jun 18, 3:33 PM EDTSpecial Weather StatementFFCTaylor27 min
Jun 18, 4:15 PM EDTSpecial Weather StatementFFCDouglas, Fulton30 min
Jun 18, 4:16 PM EDTSpecial Weather StatementFFCCarroll, Cherokee, Clayton, Cobb, DeKalb, Douglas and 3 more59 min
Jun 18, 4:41 PM EDTSpecial Weather StatementFFCChattahoochee, Marion34 min
Jun 18, 4:42 PM EDTSpecial Weather StatementFFCLamar33 min
Jun 18, 5:11 PM EDTSpecial Weather StatementFFCBarrow, Butts, Clayton, Coweta, DeKalb, Fayette and 7 more34 min
Jun 18, 5:51 PM EDTSevere Thunderstorm WarningFFCMorgan, Oconee24 min
Jun 18, 6:12 PM EDTSevere Thunderstorm WarningFFCOglethorpe33 min
Jun 18, 6:13 PM EDTSpecial Weather StatementFFCGreene32 min
Jun 18, 6:16 PM EDTSpecial Weather StatementFFCMacon29 min
Jun 18, 6:31 PM EDTSevere Thunderstorm WarningFFCGreene, Oglethorpe, Taliaferro, Wilkes44 min
Jun 18, 7:34 PM EDTSpecial Weather StatementFFCDooly26 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2013Every severe thunderstorm warning in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.