Alert archive / Georgia / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 51, NWS Charleston, SC

June 17, 1997Chatham County, Effingham County, Georgia; Jasper County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Jun 17, 1997, 6:50 PM EDT for Chatham County, Effingham County, Georgia; Jasper County, South Carolina. It was in force for 40 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 17, 1997, 6:50 PM EDT (22:50 UTC)
Expired: Jun 17, 1997, 7:30 PM EDT
In force: 40 min
Issued by: NWS Charleston, SC
Area: Whole counties

Counties Chatham County, GA, Effingham County, GA, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 46 km from the middle of the area, began a volume at 22:50 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 17, 7:05 PM EDT	Thunderstorm Wind 50	Ridgeland, SC

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, 10.8 hours before the alert went out and 130 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: 830 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 760 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 138 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 KCHS 172250 RRA
SVRCHS
GAC051-103-SCC053-172330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
650 PM EDT TUE JUN 17 1997
 
THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN  GEORGIA
 
   ...CHATHAM COUNTY...EFFINGHAM COUNTY
 
AND THE ADJACENT COASTAL WATERS
 
 
IN  SOUTH CAROLINA
 
   ...JASPER COUNTY
 
AND THE ADJACENT COASTAL WATERS
 
A LINE OF THUNDERSTORMS WITH VERY STRONG WINDS WILL QUICKLY MOVE ACROSS
EASTERN EFFINGHAM AND CHATHAM COUNTIES OF GEORGIA AND ALSO ACROSS JASPER
COUNTY SOUTH CAROLINA. THESE STORMS ARE EXPECTED TO PRODUCE WIND GUSTS
OF 60 MPH OR HIGHER...TORRENTIAL RAIN AND FREQUENT LIGHTNING AS THEY
TRACK OVER THE WARNED AREA BETWEEN 650 AND 730 PM.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL..t.VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

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 17, 2:15 PM EDT, 4 hours 35 minutes earlier.

Area forecast discussion, Jun 17, 2:15 PM EDT, 4 hours 35 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
215 PM EDT TUE JUN 17 1997

5H S/W IN MID-MS VLLY THIS EVE MOVES INTO NE THRU 12Z THU. SFC LOW
PRES ALSO MOVES INTO NE THRU 48 HRS. AMS WILL CHANGE LITTLE DURING
THE NEXT TWO DAYS WITH MOST OF THE ACTIVE WX W AND N OF THE AREA WITH
THE AHEAD OF THE VORT CENTER. NGM AND AVN MOS SPLIT ON BEST CHC FOR
POPS THE NEXT TWO DAYS...APPRS 20/30 POP WARRANTED FOR MAINLY AFTN/EVE
TSTM ACTIVITY. CWF...BNDRY LYR WINDS OF 20-25 KTS AND 850 WINDS OF
ARND 30 KTS PICK UP LT WED AND WED NIGHT. SCA MAY BE NEEDED BY WED NIGHT
BUT WE HAVE A FEW MORE MODEL RUNS TO PONDER BEFORE THAT DECISION NEEDS
TO BE MADE.

.S CST...
.TONIGHT...PARTLY CLOUDY. A 30 PERCENT CHANCE OF A SHOWER OR THUNDERSTORM
MAINLY BEFORE MIDNIGHT. LOW IN THE MID 70S. SOUTHWEST WIND 10 MPH.
.WEDNESDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF MAINLY AFTERNOON
THUNDERSTORMS. HIGH IN THE UPPER 80S COAST TO THE LOWER 90S INLAND. WEST
WIND 15 MPH BECOMING SOUTHWEST IN THE AFTERNOON.
.WEDNESDAY NIGHT...MOSTLY CLOUDY A 30 PERCENT CHANCE OF SHOWERS AND

TSTMS. LOW IN THE MID 70S.
.THURSDAY...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF AN AFTERNOON
SHOWER OR THUNDERSTORM. HIGH AROUND 90.

.CWF...
.TONIGHT...SW WIND 15 KT. SEAS 3 FT. SCTRD SHWRS AND TSTMS (ALL 4 PDS)
.WED...SW WIND INCR TO 20 KT. SEAS 4 FT.
.WED NIGHT...SW WIND 20 KT BECMG W 25 KT. SEAS 5 FT.
.THU...W WIND 20 KT. SEAS 4 FT.

CHS ARPT   74/91/73/91    3332
DNTN CHS   76/88/75/90
SAV ARPT   74/92/74/92    3332

VOLKMER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 6:19 PM EDT	Severe Thunderstorm Warning	CHS	Screven	26 min
Jun 17, 6:37 PM EDT	Severe Thunderstorm Warning	CHS	Bryan, Liberty	38 min
Jun 17, 7:18 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Colleton	42 min
Jun 17, 7:58 PM EDT	Severe Thunderstorm Warning	CHS	Charleston, Dorchester	32 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1997 Severe Thunderstorm Warnings in South Carolina, 1997 Every severe thunderstorm warning in 1997

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.