Alert archive / South Carolina / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 20, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at Aug 29, 1990, 9:16 PM EDT for Jasper County, South Carolina. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Aug 29, 1990, 9:16 PM EDT (01:16 UTC)
- Expired
- Aug 29, 1990, 10:15 PM EDT
- In force
- 59 min
- Issued by
- NWS Charleston, SC
- Area
- Whole counties
County Jasper 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 00:00Z, 1.3 hours before the alert went out and 110 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
- 4174 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 996 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 8.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCHS 300123 SVRCHS SCC053-300215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHARLESTON SC 916 PM EDT WED AUG 29 1990 THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CAROLINA ...JASPER COUNTY THIS INCLUDES THE COMMUNITIES OF OLD HOUSE AND RIDGELAND AT 920PM EDT RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES WEST OF RIDGELAND MOVING TOWARDS THE SOUTHEAST AT 20 MILES AN HOUR. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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 29, 6:25 PM EDT, 2 hours 51 minutes before
GAZ013-292320- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAVANNAH GA 625 PM EDT WED AUG 29 1990 ...A VERY STRONG THUNDERSTORM WAS LOCATED IN CENTRAL PIERCE COUNTY... AT 615 PM EDT WEATHER RADARS INDICATED A VERY STRONG THUNDERSTORM 5 MILES NORTHEAST OF BLACKSHEAR IN CENTRAL PIERCE COUNTY. THE STORM WAS MOVING TO THE SOUTHEAST AT 15 MPH. VERY HEAVY RAIN...BRIEF GUSTY WINDS...DANGEROUS LIGHTNING AND POSSIBLE SMALL HAIL WILL OCCUR WITH QTHIS THUNDERSTORM AS IT MOVES TOWARD NAHUNTA IN BRANTLEY COUNTY BY 715 PM EDT.
Special weather statement, Aug 29, 8:15 PM EDT, 1 hour 1 minute before
SCZ007-008-232240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE CHARLESTON SC 815 PM EDT TUE AUG 27 1990 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR WILLIAMSVBURG COUNTY UNTIL 10 PM... AT 8.10 PM...A CLUSTER OF VERY STRONG THUNDERSTORMS WERE OVER THE NORTHERN MIDLANDS OF SOUTH CAROLINA. THESE STORMS ARE MOVING SOUTHEAST AROUND 20 MILES AN HOUR AND WILL BE MOVING INTO WILLIAMSBURG COUNTY WITHIN THE NEXT HOUR. THE_SE STORMS MAY CONTAIN HEAVY RAIN...POSSIBLE SMALL HAIL...AND FREQUENT LIGHTNING. THE HEAVY RAIN MAY CAUSE SOME LOCALIZED FLOODING AND MOTORIST SHOULD LOOK OUT FOR AREAS PRONE TO FLOODING. SIKORA
Special weather statement, Aug 29, 8:16 PM EDT, 1 hour before
SCZ007-008-232240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE CHARLESTON SC 815 PM EDT TUE AUG 27 1990 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR WILLIAMSBURG COUNTY UNTIL 10 PM... AT 8.10 PM...A CLUSTER OF VERY STRONG THUNDERSTORMS WERE OVER THE NORTHERN MIDLANDS OF SOUTH CAROLINA. THESE STORMS ARE MOVING SOUTHEAST AROUND 20 MILES AN HOUR AND WILL BE MOVING INTO WILLIAMSBURG COUNTY WITHIN THE NEXT HOUR. `THESE STORMS MAY CONTAIN HEAVY RAIN...POSSIBLE SMALL HAIL...AND FREQUENT LIGHTNING. THE HEAVY RAIN MAY CAUSE SOME LOCALIZED FLOODING AND MOTORIST SHOULD LOOK OUT FOR AREAS PRONE TO FLOODING. SIKORA
Special weather statement, Aug 29, 8:43 PM EDT, 33 minutes before
SCZ007-008-300140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE CHARLESTON SC 830 PM EDT THU AUG 29 1990 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR WILLIAMSBURG COUNTY UNTIL 10 PM... A CLUSTER OF VERY STRONG THUNDERSTORMS WAS OVER THE NORTHERN MIDLANDS OF SOUTH CAROLINA. THESE STORMS ARE MOVING SOUTHEAST AROUND 20 MILES AN HOUR AND WILL BE MOVING INTO WILLIAMSBURG COUNTY WITHIN THE NEXT THE NEXT HALF HOUR. THESE STORMS CONTAIN HEAVY RAIN...POSSIBLE HAIL... STRONG GUSTY WINDS...AND FREQUENT LIGHTNING. THE HEAVY RAIN MAY CAUSE SOME LOCALIZED FLOODING AND MOTORIST SHOULD LOOK OUT FOR AREAS PRONE TO FLOODING. PERSONS ALONG ENTIRE SOUTH CAROLINA COAST SHOULD STAY TUNED TO NOAA WEATHER RADIO...LOCAL RADIO OR TV FOR FURTHER DEVELOPMENTS. SIKORA
The office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 9:18 PM EDT | Severe Thunderstorm Warning | CHS | Williamsburg | 57 min |
| Aug 29, 10:03 PM EDT | Severe Thunderstorm Warning | CHS | Berkeley | 57 min |
| Aug 29, 10:34 PM EDT | Tornado Warning | CHS | Berkeley | 56 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.