Alert archive / South Carolina / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 15, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at Aug 1, 1990, 8:28 PM EDT for Georgetown County, South Carolina. It was in force for 62 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
- Aug 1, 1990, 8:28 PM EDT (00:28 UTC)
- Expired
- Aug 1, 1990, 9:30 PM EDT
- In force
- 62 min
- Issued by
- NWS Charleston, SC
- Area
- Whole counties
County Georgetown County, SC
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 1, 9:06 PM EDT | Hail 1 | Georgetown, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 00:00Z, 0.5 hours before the alert went out and 87 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.
- Mixed-layer CAPE
- 130 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 1217 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCHS 020032 SVRCHS SCC043-020130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHARLESTON SC 828 PM EDT WED AUG 1 1990 THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 930 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CAROLINA ...GEORGETOWN COUNTY THIS INCLUDES THE COMMUNITIES OF GEORGETOWN AND ANDREWS. AT 8.30 PM EDT RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES WEST OF GEROGREOWN AND ANDREWS MOVING TOWARD THE EAST AT 15 MPH. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLWIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
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, Aug 1, 4:44 PM EDT, 3 hours 44 minutes before
SCZ007-008-012145- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE CHARLESTON SC 330 PM EDT WED JUL 25 1990 ...THUNDERSTORMS WITH HEAVY RAIN OVER SOUTH COASTAL SOUTH CAROLINA... AT 440 PM EDT...THUNDERSTORMS...SOME WITH VERY HEAVY DOWNPOURS WERE DEVELOPING OVER THE LOWER COASTAL AREA OF SOUTH CAROLINA. THE THUNDER- STORMS AND HEAVY SHOWERS WILL CAUSE SOME FLOODING OF CITY STREETS AND DROP VISIBILITY TO NEAR ZERO ON THE ROADWAYS. THE HEAVIER STORMS WERE IN SOUTHEAST GEORGIA TO THE WEST OF SAVANNAH. RMS
Special weather statement, Aug 1, 5:39 PM EDT, 2 hours 49 minutes before
SCZ007-008-012245- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE CHARLESTON SC 535 PM EDT WED JUL 25 1990 ...THUNDERSTORMS WITH HEAVY RAIN OVER SOUTH COASTAL SOUTH CAROLINA... AT 530 PM EDT...THUNDERSTORMS...SOME WITH VERY HEAVY DOWNPOURS WERE SCATTERED OVER THE LOWER COASTAL COUNTIES OF SOUTH CAROLINA. THE HEAVIER THUNDERSTORMS AND SHOWERS WERE IN A NARROW BAND FROM NEAR MT PLEASANT TO A FEW MILES NORTHWEST OF BEAUFORT. THESE STORMS AND SHOWERS WERE MOVING TOWARD THE EAST-SOUTHEAST AT AROUND 10 MILES AN HOUR. SOME STREET FLOODING...PONDING OF WATER ON HIWAYS AND POSSIBLY SOME SMALL HAIL WILL ACCOMPANY THESE STORMS. THUNDERSTORMS AND SHOWERS WERE IN SOUTHEAST GEORGIA FROM SAVANNAH TO THE FLORIDA BORDER. THE SHOWERS WERE EXTENDING INLAND ABOUT 60 MILES. SIMPSON
Special weather statement, Aug 1, 6:03 PM EDT, 2 hours 25 minutes before
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
Special weather statement, Aug 1, 6:41 PM EDT, 1 hour 47 minutes before
SCZ007-008-012345- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE CHARLESTON SC 635 PM EDT WED JUL 25 1990 ...THUNDERSTORMS WITH HEAVY RAIN OVER CHARLESTON COUNTY... AT 630 PM EDT...A CLUSTER OF INTENSE THUNDERSTORMS WAS MOVING THROUGH THE TRI-COINTY AREA OF CHARLESTON-BERKELEY-DORCHESTER. THESETHUNDER- STORMS WILL HAVE STRONG GUSTY WINDS...HAIL AND VERY HEAVY RAIN AS THEY MOVE EAST THROUGH THE TRI-COUNTY AREA. AT THE CHARLESTON INTERNATIONAL AIRPORT WINDS WERE GUSTING TO 35 MILES AN HOUR. THESE STORMS WILL AFFECT NORTH CHARLESTON...CHARLESTON...SUMMERVILLE... GOOSE CREEK AND HANNAHAN. IF DRIVING BE PREPARED FOR FLOODED STREETS... VISIBILITY NEAR ZERO AND SUDDEN STRONG WINDS. OTHER THUNDERSTORMS WERE SCATTERED OVER THE LOWER COASTAL COUNTIES AND IN SOUTHEAST GEORGIA. SIMPSON
Local storm report, Aug 1, 6:42 PM EDT, 1 hour 46 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE SAVANNAH GA 640 PM EDT AUG 1 1990 ...STRORM RELATED DAMAGE IN CHATHAM COUNTY 08/01/90 AT 230 PM EDT 8/01/90 A SEVERE THUNDESTORM MOVED ACROSS NORTHERN CHATHAM COUNTY. AT THE SAVANNAH INTERNATIONAL AIRPORT...THE FBO BUILDING (BUTLER AVIATION) RECEIVED SUBSTANTIAL DAMAGE. ABOUT 1/2 OF THE ROOF WAS RIPPED OFF AND WATER DAMAGE INSIDE HELPED TO DAMAGE THE AIR CONDITIONING UNITS. AT ABOUT THE SAME TIME...THE WEATHER SERVICE OFFICE AT THE AIRPORT CLOCKED A WIND GUST OF 50 KNOTS. THE STORM MOVED EAST INTO PORT WENTWORTH AND AT 320 PM HIGH WINDS BLEW DOWN POWER LINES. BETWEEN 3 AND 4 PM LARGE LIMBS WERE BLOWN DOWN AND HOUSE AWNINGS WERE DESTROYED NEAR VICTORY AND SKIDAWAY DRIVES IN SAVANNAH AND LARGE TREES WERE BLOWN DOWN NEAR BULL STREET AND 52ND AVE DURING THE SAME TIME FRAME. AT ABOUT 430 PM LARGE TREES WERE DOWNED IN GEORGTOWN ON THE SOUTH SIDE OF SAVANNAH. AT 6 PM... SAVANNAH ELECTRIC AND POWER COMPANY REPORTED THAT MANY POWER LINES AND TREES WERE DOWN OVER A GENERAL AREA BETWEEN VERNONBURG AND WILMINGTON ISLAND.
Special weather statement, Aug 1, 7:38 PM EDT, 50 minutes before
SCZ007-008-020045- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE CHARLESTON SC 735 PM EDT WED JUL 25 1990 AT 730 PM EDT...THUNDERSTORMS WITH VERY HEAVY RAIN AND STRONG GUSTY WINDS HAD MOVED EAST OF SUMMERVILLE AND THE CHARLESTON AREA. WINDS GUSTING TO 45 MILES AN HOUR WERE RECORDED AT THE CHARLESTON INTERNATIONAL AIRPORT AS THESE STORMS MOVED EAST. THUNDERSTORMS HAD DEVELOPED IN THE NORTH MIDLANDS AND NORTHERN COASTAL AREAS OF SOUTH CAROLINA. A FEW THUNDERSTORMS WERE ALONG THE SAVANNAH RIVER SOUTH OF AUGUSTA. A FEW HEAVY THUNDERSTORMS IN THE MT PLEASANT AREA WILL MOVE INTO THE COASTAL WATERS AND BOATERS SHOULD BE ALERT FROM THE CHARLESTON HARBOR TO NORTH ISLAND FOR THE NEXT TWO HOURS. ALL PRECIPITATION WAS MOVING TO THE EAST AT 10 TO 15 MILES AN HOUR. SIMPSON
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.