Alert archive / South Carolina / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 9, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at May 27, 1990, 7:03 PM EDT for Colleton County, South Carolina. It was in force for 57 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
- May 27, 1990, 7:03 PM EDT (23:03 UTC)
- Expired
- May 27, 1990, 8:00 PM EDT
- In force
- 57 min
- Issued by
- NWS Charleston, SC
- Area
- Whole counties
County Colleton 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 |
|---|---|---|---|
| May 27, 7:30 PM EDT | Thunderstorm Wind 0 | Colleton, 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 12:00Z, 11.1 hours before the alert went out and 61 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
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCHS 272305 SVRCHS SCC029-280000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHARLESTON SC 703 PM EDT SUN MAY 27 1990 THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 800 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CAROLINA ...COLLETON COUNTY THIS INCLUDES THE COMMUNITIES OF HENDERSONVILLE AT 700 PM EDT RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES WEST OF HENDERSONVILLE MOVING TOWARDS THE EAST 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 MODVE 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, May 27, 3:46 PM EDT, 3 hours 17 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
Special weather statement, May 27, 4:51 PM EDT, 2 hours 12 minutes before
SCZ007-008-272145- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE CHARLESTON SC 448 PM EDT SUN MAY 27 1990 ...A SEVERE THUNDERSTORM WARNING EXPIRED AT 4.45 PM EDT FOR BERKELEY AND CHARLESTON COUNTIES... AT 4.45 PM EDT...SCATTERED SHOWERS AND THUNDERSTORMS WERE OVER THE MIDLANDS AND NORTHERN COASTAL COUNTIES OF SOUTH CAROLINA...MOSTLY OVER THE SOUTHERN MIDLANDS. THE STRONGEST THUNDERSTORMS WERE NEAR HUGER...MYRTLE BEACH...AND BETWEEN COLUMBIA AND SUMTER. THESE STORMS ARE LIKELY TO PRODUCE LOCALLY HEAVY RAIN...GUSTY WINDS...FREQUENT LIGHTNING...AND POSSIBLE HAIL. MOVEMENT WAS TOWARDS THE EAST AND SOUTHEAST 20 MILES AN HOUR. JS/LH
Special weather statement, May 27, 6:02 PM EDT, 1 hour 1 minute before
SCZ007-008-272300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE CHARLESTON SC 600 PM EDT SUN MAY 27 1990 ...STRONG THUNDERSTORMS OVER THE COASTAL PLAINS OF SOUTH CAROLINA... AT 5.50 PM...SCATTERED THUNDERSTORMS WERE OVER THE MIDLANDS AND COASTAL COUNTIES OF SOUTH CAROLINA. THE STRONGEST STORMS WERE NEAR MURRELLS INLET...AND BETWEEN SUMMERVILLE AND SAINT GEORGE. THESE STORMS ARE LIKELY TO PRODUCE LOCALLY HEAVY RAIN... GUSTY WINDS...FREQUENT LIGHTNING...AND HAIL. MOVEMENT WAS TOWARDS THE EAST AND SOUTHEAST 20 MILES AN HOUR. JS/LH
Special weather statement, May 27, 7:00 PM EDT, 3 minutes before
SCZ007-008-280000- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE CHARLESTON SC 658 PM EDT SUN MAY 27 1990 ...SEVERE THUNDERSTORM WARNING IN EFFECT FOR DORCHESTER COUNTY UNTIL 7.15 PM ... AT 6.45 PM...SHOWERS AND THUNDERSTORMS WERE OVER THE COASTAL PLAINS OF SOUTH CAROLINA...MOSTLY BETWEEN 25 AND 50 MILES INLAND FROM THE COAST. THE STRONGEST STORMS WERE BETWEEN THE SANTEE COOPER LAKES AND MURRELLS INLET...AND FROM SU?MMERVILLE WESTWARD TO HAMPTON COUNTY. THESE STORMS ARE LIKELY TO PRODUCE LOCALLY HEAVY RAIN...GUSTY WINDS...FREQUENT LIGHTNING...AND POSSIBLE HAIL. MOVEMENT WAS TOWARDS THE EAT AT 20 MILES AND HOUR. LWH
The office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 3:57 PM EDT | Severe Thunderstorm Warning | CHS | Berkeley, Charleston | 48 min |
| May 27, 6:11 PM EDT | Severe Thunderstorm Warning | CHS | Dorchester | 64 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.