Alert archive / Georgia / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 69, NWS Charleston, SC

July 21, 2002Screven County, Georgia

NWS Charleston, SC issued this severe thunderstorm warning at Jul 21, 2002, 5:27 PM EDT for Screven County, Georgia. It was in force for 48 min. 2 reports 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: Jul 21, 2002, 5:27 PM EDT (21:27 UTC)
Expired: Jul 21, 2002, 6:15 PM EDT
In force: 48 min
Issued by: NWS Charleston, SC
Area: Whole counties

County Screven County, GA

The radar

The Charleston,SC radar (KCLX), 54 km from the middle of the area, began a volume at 21:27 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

Time	Report	Where	Remark
Jul 21, 5:40 PM EDT	Hail 0.75	Sylvania, GA
Jul 21, 5:40 PM EDT	Thunderstorm Wind 52 E	Sylvania, GA

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

Jacksonville, FL (KNIP), launched 12:00Z, 9.5 hours before the alert went out and 250 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 231 J/kg
Mixed-layer CIN: -174 J/kg
Mixed-layer LCL: 1181 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 24 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.

840 
WUUS52 KCHS 212127
SVRCHS
GAC251-212215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
525 PM EDT SUN JUL 21 2002

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL SCREVEN COUNTY IN EAST CENTRAL GEORGIA.

* UNTIL 615 PM EDT.

* AT 525 PM EDT...RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES NORTH
  OF HUNTERS...OR ABOUT 7 MILES SOUTHEAST OF SYLVANIA...MOVING       
  NORTHWEST AT 5 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  HUNTERS.
  CAPTOLO.
  ALTMAN.
  SYLVANIA.

DIME SIZE HAIL AND 60 MPH WINDS ARE EXPECTED IN THE WARNED AREA.

BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

$$

LAT...LON 3258 8143 3284 8147 3289 8169 3258 8172

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 21, 4:45 PM EDT	Severe Thunderstorm Warning	CHS	Bulloch	45 min
Jul 21, 5:11 PM EDT	Severe Thunderstorm Warning	CHS	Candler	34 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2002 Every severe thunderstorm warning in 2002

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.