Alert archive / Georgia / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 40, NWS Charleston, SC

June 30, 2002Bulloch County, Effingham County, Georgia

NWS Charleston, SC issued this severe thunderstorm warning at Jun 30, 2002, 4:57 PM EDT for Bulloch County, Effingham County, Georgia. It was in force for 48 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, 2002, 4:57 PM EDT (20:57 UTC)
Expired: Jun 30, 2002, 5:45 PM EDT
In force: 48 min
Issued by: NWS Charleston, SC
Area: Whole counties

Counties Bulloch County, GA, Effingham County, GA

The radar

The Charleston,SC radar (KCLX), 56 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

Time	Report	Where	Remark
Jun 30, 5:15 PM EDT	Thunderstorm Wind 50 E	Statesboro, GA	Several large limbs and power lines were down.

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

Charleston AFB, SC (KCHS), launched 12:00Z, 9.0 hours before the alert went out and 155 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: 2466 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 746 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

782 
WUUS52 KCHS 302057
SVRCHS
GAC031-103-302145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
458 PM EDT SUN JUN 30 2002

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL BULLOCH COUNTY IN SOUTHEAST GEORGIA.
  NORTHERN EFFINGHAM COUNTY IN SOUTHEAST GEORGIA.

* UNTIL 545 PM EDT.

* AT 458 PM EDT...RADAR INDICATED A SEVERE THUNDERSTORM NEAR
  SHAWNEE...OR ABOUT 8 MILES NORTH OF SPRINGFIELD...MOVING WEST AT 20
  MPH.

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 3246 8186 3226 8163 3242 8116 3259 8135
          3248 8155

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Charleston, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 30, 3:24 PM EDT, 1 hour 33 minutes earlier.

Area forecast discussion, Jun 30, 3:24 PM EDT, 1 hour 33 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
324 PM EDT SUN JUN 30 2002

WIDELY SCT SHRA/TSRA FIRING ALONG SEA BREEZE AND REMNANTS OF WEAK
TROF THIS PM. ACTIVITY SHOULD DISSIPATE WITH SS SO WL CARRY SLIGHT
CHC EARLY ALL GROUPS.

DRY AIR IS PROGD TO WORK INTO FA ON MON. WL CARRY SLIGHT CHC POPS
FOR SC INLAND COUNTIES DUE TO COMBINATION OF SEA BREEZE AND WK S/WV
OVER UPSTATE SC.  HOWEVER...WL LEAVE REST OF FA DRY.

WL LEAVE MON NIGHT DRY AND THEN CARRY SLIGHT CHC POPS ON TUE.  REST
OF WEEK WL NEED A SLIGHT CHC OR CHC SHRA/TSRA.

CWF...EXPECT SE WINDS BECMG LGT TONIGHT AND SE WIND PICKING UP AGAIN
FOR MON THRU TUE. SPEEDS AND SEAS WELL BLO SCA. NO HEADLINES.

FCSTID = 15
CHS   73  91  73  92 /  20  10   0  20
SAV   72  91  70  93 /  20  10   0  20
CHL   76  86  74  86 /  20  10   0  20
NBC   75  90  74  92 /  20  10   0  20
RBW   72  93  72  93 /  20  20   0  20

.CHS...
GA...NONE.
SC...NONE.

SCW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 5:59 PM EDT	Severe Thunderstorm Warning	CHS	Evans, Tattnall	31 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.