Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 82, NWS Atlanta, GA

May 28, 2015Floyd County, Gordon County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at May 28, 2015, 4:59 PM EDT for Floyd County, Gordon County, Georgia. It was in force for 19 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
May 28, 2015, 4:59 PM EDT (20:59 UTC)
Expired
May 28, 2015, 5:18 PM EDT
In force
19 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Floyd County, GA, Gordon County, GA

The radar

The Northeast Alabama radar (KHTX), 103 km from the middle of the area, began a volume at 21:00 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.

What was reported inside it

TimeReportWhereRemark
May 28, 5:05 PM EDTHAIL 1Sugar Valley, GAMOSTLY DIME TO NICKLE SIZE HAIL BUT FEW UP TO QUARTER SIZE.

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, 9.0 hours before the alert went out and 143 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 2015-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 397 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 2015-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
397 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
722 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
65 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

586 
WUUS52 KFFC 282059
SVRFFC
GAC115-129-282145-
/O.NEW.KFFC.SV.W.0082.150528T2059Z-150528T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
459 PM EDT THU MAY 28 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN GORDON COUNTY IN NORTHWESTERN GEORGIA...
  NORTHERN FLOYD COUNTY IN NORTHWESTERN GEORGIA...

* UNTIL 545 PM EDT

* AT 458 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR RESACA...OR
  NEAR CALHOUN...MOVING NORTHWEST AT 10 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. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CALHOUN...RESACA...LAKE MARVIN...SUGAR VALLEY AND OOSTANAULA. 

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 3461 8505 3462 8502 3458 8495 3451 8494
      3447 8501 3454 8513 3457 8512 3459 8510
      3459 8506 3462 8506
TIME...MOT...LOC 2058Z 145DEG 11KT 3455 8503 

HAIL...1.00IN
WIND...60MPH
 
$$
1 follow-up statement
404 
WWUS52 KFFC 282118
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
518 PM EDT THU MAY 28 2015

GAC115-129-282127-
/O.CAN.KFFC.SV.W.0082.000000T0000Z-150528T2145Z/
GORDON GA-FLOYD GA-
518 PM EDT THU MAY 28 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN GORDON AND
NORTHERN FLOYD COUNTIES IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED.

HOWEVER GUSTY WINDS TO 40 MPH... SMALL HAIL AND VERY HEAVY RAIN ARE 
STILL POSSIBLE WITH THIS STRONG THUNDERSTORM LOCATED ACROSS 
NORTHWEST GORDON COUNTY AND MOVING NORTH AROUND 15 MPH.

LAT...LON 3461 8505 3462 8502 3458 8495 3451 8494
      3447 8501 3454 8513 3457 8512 3459 8510
      3459 8506 3462 8506
TIME...MOT...LOC 2116Z 145DEG 11KT 3460 8507 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 8:20 PM EDTSpecial Weather StatementFFCGlascock25 min
May 27, 8:23 PM EDTSpecial Weather StatementFFCDooly37 min
May 27, 10:13 PM EDTSpecial Weather StatementFFCTroup32 min
May 27, 10:50 PM EDTSpecial Weather StatementFFCTroup25 min
May 27, 11:15 PM EDTSpecial Weather StatementFFCCoweta, Fayette30 min
May 27, 11:46 PM EDTSpecial Weather StatementFFCClayton, Fayette29 min
May 28, 1:05 AM EDTSpecial Weather StatementFFCClayton, DeKalb, Fulton, Gwinnett, Rockdale25 min
May 28, 1:33 AM EDTSpecial Weather StatementFFCGwinnett, Rockdale27 min
May 28, 1:58 AM EDTSpecial Weather StatementFFCBarrow, Morgan, Newton, Walton32 min
May 28, 12:25 PM EDTSpecial Weather StatementFFCCoweta50 min
May 28, 1:29 PM EDTSpecial Weather StatementFFCCoweta31 min
May 28, 1:40 PM EDTSpecial Weather StatementFFCClarke65 min
May 28, 2:03 PM EDTSpecial Weather StatementFFCOglethorpe57 min
May 28, 2:17 PM EDTSpecial Weather StatementFFCCobb28 min
May 28, 2:22 PM EDTSpecial Weather StatementFFCOglethorpe23 min
May 28, 2:52 PM EDTSpecial Weather StatementFFCCarroll53 min
May 28, 2:55 PM EDTSpecial Weather StatementFFCHenry65 min
May 28, 4:01 PM EDTSpecial Weather StatementFFCCoweta59 min
May 28, 4:06 PM EDTSpecial Weather StatementFFCBanks, Hall54 min
May 28, 4:12 PM EDTSpecial Weather StatementFFCGordon63 min
May 28, 4:20 PM EDTFlash Flood WarningFFCCoweta, Meriwether6 hr
May 28, 4:50 PM EDTSpecial Weather StatementFFCForsyth55 min
May 28, 4:56 PM EDTSpecial Weather StatementFFCGordon34 min
May 28, 5:12 PM EDTSpecial Weather StatementFFCWhitfield33 min
May 28, 5:34 PM EDTSpecial Weather StatementFFCMurray, Whitfield41 min
May 28, 5:59 PM EDTSpecial Weather StatementFFCTroup61 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2015Every severe thunderstorm warning in 2015

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.