Alert archive / South Carolina / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 145, NWS Charleston, SC

June 29, 1998Dorchester County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Jun 29, 1998, 6:27 PM EDT for Dorchester County, South Carolina. It was in force for 33 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: Jun 29, 1998, 6:27 PM EDT (22:27 UTC)
Expired: Jun 29, 1998, 7:00 PM EDT
In force: 33 min
Issued by: NWS Charleston, SC
Area: Whole counties

County Dorchester County, SC

The radar

The Charleston,SC radar (KCLX), 76 km from the middle of the area, began a volume at 22:30 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 29, 6:29 PM EDT	Thunderstorm Wind 50	Summerville, SC	Camper trailer overturned. One minor injury.
Jun 29, 6:30 PM EDT	Thunderstorm Wind 55	Summerville, 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, 10.5 hours before the alert went out and 43 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: 1828 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1350 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: -10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 29, 2:25 PM EDT, 4 hours 2 minutes earlier.

Area forecast discussion, Jun 29, 2:25 PM EDT, 4 hours 2 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
225 PM EDT MON JUN 29 1998

GONNA BE SHORT AS RADAR BEGINNING TO GET ACTIVE JUST INLAND FROM THE
CST. EXPCT RAPID DEVELOPMNT OF STRONG CELLS THROUGH THE REMAINDER OF THE
AFTN/EVE. MODELS DEPCTNG WK SFC TROF TO HANG AROUND THE ERN PORTION OF
THE STATE AS UPR TROF MOVES TO THE E ACRS THE OH VLY. SFC LO MOVES NE
TIGHTENING GRAD OUT OF SW FOR TUE. AVN/ETA SEEM JUST A TAD FURTHER S
WITH UPR VORT...BUT NOT ENUF TO HELP GREATLY WITH TEMP RELIEF. NGM
ACTUALLY A LTL COOLER FOR WED COMPRD TO AVN. AT LST ONE MORE HOT DAY TO
WARRANT HT ADV. WL LEAN TOWARD PERSISTENCE ON TUE AND CONT THE 20-30
POP RANGE WITH ENUF INSTAB AND CAPE...CONT FOR WED AS ENERGY CLIPS
CLOSE ENUF JUST TO THE N. FLO WL SWING TO THE MAINLY SW LLVLS BUT ATTIM
WL MAINTAIN CWF BLO SCA...COULD SEE GUSTS TO 20 KT DUR TUE AFTN THRU
LATE EVE.

S CST
...HEAT ADVISORY IN EFFECT FOR TUE...
.TONIGHT...A 20 PERCENT CHC OF EVE THUNDERSTORMS. FAIR SKIES BY
MIDNIGHT. LOWS 75-80. SW WIND 10 MPH.
.TUE...A 20 PERCENT CHC OF AFTN/EVE THUNDERSTORMS. HIGHS 95-100. SW
WIND 10 MPH INCREASING TO 15 MPH DURING THE AFTERNOON.
.TUE NIGHT...A 20 PERCENT CHC OF EVE THUNDERSTORMS...OTHERWISE FAIR.
LOWS 75-80
.WED...A 30 PERCENT CHC OF MAINLY AFTN/EVE THUNDERSTORMS. HIGHS MID TO
UPPER 90S.

CHS ARPT  BB  75/98/75/95  2213
CHS CITY      80/95/80/94
SAV ARPT  BB  74/99/75/98  2213

MJR

In the hours before

Local storm report, Jun 29, 4:53 PM EDT, 1 hour 34 minutes before

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Local storm report, Jun 29, 4:53 PM EDT, 1 hour 34 minutes before

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Special weather statement, Jun 29, 5:25 PM EDT, 1 hour 2 minutes before

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Special weather statement, Jun 29, 5:25 PM EDT, 1 hour 2 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 2:08 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	47 min
Jun 29, 6:06 PM EDT	Severe Thunderstorm Warning	CHS	Colleton	64 min
Jun 29, 3:45 PM EDT	Severe Thunderstorm Warning	CHS	Long	45 min
Jun 29, 4:08 PM EDT	Severe Thunderstorm Warning	CHS	Liberty	47 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 1998 Every 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.