Alert archive / Georgia / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 83, NWS Charleston, SC

August 18, 2002Chatham County, Georgia

NWS Charleston, SC issued this severe thunderstorm warning at Aug 18, 2002, 3:33 PM EDT for Chatham County, Georgia. It was in force for 57 min. 3 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: Aug 18, 2002, 3:33 PM EDT (19:33 UTC)
Expired: Aug 18, 2002, 4:30 PM EDT
In force: 57 min
Issued by: NWS Charleston, SC
Area: Whole counties

County Chatham County, GA

What was reported inside it

Time	Report	Where	Remark
Aug 18, 3:45 PM EDT	Thunderstorm Wind 50 E	Savannah, GA	Several trees and large limbs were down. A tree fell on a car at Skidaway Road and 52nd Street.
Aug 18, 4:05 PM EDT	Hail 0.88	Thunderbolt, GA
Aug 18, 4:10 PM EDT	Hail 1.25	Savannah, 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 (KJAX), launched 12:00Z, 7.6 hours before the alert went out and 174 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: 705 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 942 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: -1 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 
WUUS52 KCHS 181933 CCA
SVRCHS

WUUS52 KCHS DDHHMM
SVRCHS
GAC051-182030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED
NATIONAL WEATHER SERVICE CHARLESTON SC
325 PM EDT SUN AUG 18 2002

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHATHAM COUNTY IN SOUTHEAST GEORGIA

* UNTIL 430 PM EDT.

* AT 325 PM EDT...RADAR INDICATED A SEVERE THUNDERSTORM ALONG THE    
  SAVANNAH RIVER...OR ABOUT 5 MILES EAST OF DOWNTOWN              
  SAVANNAH...MOVING SOUTH AT 10 MPH.

* SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE...SAVANNAH AND    
  THUNDERBOLT.

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 3202 8090 3207 8104 3196 8116 3179 8095

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 3:28 PM EDT	Severe Thunderstorm Warning	CHS	Chatham	62 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.