Alert archive / South Carolina / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 7, NWS Charleston, SC

May 27, 1990Berkeley County, Charleston County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at May 27, 1990, 3:57 PM EDT for Berkeley County, Charleston County, South Carolina. It was in force for 48 min.

The area

The counties it named.

The facts

Issued
May 27, 1990, 3:57 PM EDT (19:57 UTC)
Expired
May 27, 1990, 4:45 PM EDT
In force
48 min
Issued by
NWS Charleston, SC
Area
Whole counties

Counties Berkeley County, SC, Charleston County, SC

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 8.0 hours before the alert went out and 10 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-pSkew-T log-p diagram, Charleston AFB, SC at 12:00Z on 1990-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1033 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 1990-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1033 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
838 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
66 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.

In the hours before

Special weather statement, May 27, 3:46 PM EDT, 11 minutes before
SCZ007-008-272030-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE CHARLESTON SC
330 PM EDT SUN MAY 27 1990

A CLUSTER OF THUNDERSTORMS WITH VERY HEAVY RAINFALL WAS LOCATED JUST
WEST OF MYRTLE BEACH SOUTH CAROLINA...AND NEAR HUGER AND MCLELLANVILLE.

PERSONS ON THE BEACHES AND BOATERS FROM MYRTLE BEACH TO BULLS BAY
SHOULD KEEP ALERT FOR HEAVY DOWNPOURS...GUSTY WINDS AND FREQUENT
LIGHTNING AS THE STORMS MOVE TO THE EAST AND OFFSHORE WITHIN THE
NEXT 1 TO 2 HOURS.

ADDITIONAL THUNDERSTORMS WERE WIDELY SCATTERED OVER THE REMAINDER
OF SOUTH CAROLINA...MOSTLY OVER THE PIEDMONT AND COASTAL SECTIONS.

MOVEMENT WAS TO THE EAST AT 30 MILES AN HOUR.

RAO

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 6:11 PM EDTSevere Thunderstorm WarningCHSDorchester64 min
May 27, 7:03 PM EDTSevere Thunderstorm WarningCHSColleton57 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 1990Every severe thunderstorm warning in 1990

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.