Alert archive / Georgia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 785, NWS Atlanta, GA

June 30, 1998DeKalb County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jun 30, 1998, 9:04 PM EDT for DeKalb County, Georgia. It was in force for 36 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 30, 1998, 9:04 PM EDT (01:04 UTC)
Expired
Jun 30, 1998, 9:40 PM EDT
In force
36 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County DeKalb County, GA

The radar

The Atlanta radar (KFFC), 55 km from the middle of the area, began a volume at 00:47 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.

What was reported inside it

TimeReportWhereRemark
Jun 30, 9:10 PM EDTThunderstorm WindStone Mtn, GADe Kalb county 911 reported large limbs knocked down power lines.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.1 hours before the alert went out and 51 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 00:00Z on 1998-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1323 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 1998-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 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
1323 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1608 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
113 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.

000 
TTAA00 KATL 010104 RRA
SVRATL
GAC089-010140-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
904 PM EDT TUE JUN 30 1998

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DEKALB COUNTY IN NORTHWESTERN GEORGIA

* UNTIL 940 PM EDT

* AT 902 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  IN THE VICINITY OF LITHONIA MOVING EAST AT 40 MPH.


PAH/TSM

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 8:15 PM EDTSevere Thunderstorm WarningFFCGwinnett35 min
Jun 30, 8:24 PM EDTSevere Thunderstorm WarningFFCDouglas36 min
Jun 30, 8:46 PM EDTSevere Thunderstorm WarningFFCFulton34 min
Jun 30, 8:57 PM EDTSevere Thunderstorm WarningFFCClayton33 min
Jun 30, 9:11 PM EDTSevere Thunderstorm WarningFFCNewton, Rockdale34 min
Jun 30, 9:14 PM EDTSevere Thunderstorm WarningFFCHenry36 min
Jun 30, 9:29 PM EDTSevere Thunderstorm WarningFFCButts, Jasper46 min
Jun 30, 10:26 PM EDTSevere Thunderstorm WarningFFCBartow, Cherokee, Gordon34 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1998Every severe thunderstorm warning in 1998

Sources

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