Alert archive / South Carolina / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 99, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 20, 1990, 4:38 PM EDT for Abbeville County, Greenwood County, South Carolina. It was in force for 67 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 20, 1990, 4:38 PM EDT (20:38 UTC)
- Expired
- Aug 20, 1990, 5:45 PM EDT
- In force
- 67 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Whole counties
Counties Abbeville County, SC, Greenwood 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 20, 5:00 PM EDT | Thunderstorm Wind 0 | Greenwood, 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
Athens Municipal, GA (KAHN), launched 12:00Z, 8.6 hours before the alert went out and 97 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
- 612 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1310 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 36 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 KGSP 202039 SVRGSP SCC001-047-202145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC 438 PM EDT MON AUG 20 1990 THE NATIONAL WEATHER SERVICE IN GREENVILLE SPARTANBURG HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH CAROLINA ...ABBEVILLE COUNTY...WESTERN GREENWOOD COUNTY AT 437 PM EDT WEATHER RADAR SHOWED A SEVERE THUNDERSTORM OVER CENTRAL GREENWOOD COUNTY NEAR THE TOWN OF GREENWOOD. THE STORM WAS MOVING SLOW TO THE SOUTHWEST. THIS SLOW MOVING THUNDERSTORM MAY ALSO CAUSE FLOODING OF SMALL STREAMS...LOW AREAS...AND UNDERPASSES. PEOPLE IN THE PATH OF THIS STORM SHOULD BE ALERT FOR LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN CAN OCCUR WITH ANY THUNDERSTORM. VALVERDE
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 20, 2:25 PM EDT, 2 hours 13 minutes before
NCZ007-009-010-011-012-013-202030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ASHEVILLE NC 225 PM EDT MON AUG 20 1990 ...THUNDERSTORMS ON THE INCREASE ACROSS THE MOUNTAINS... AT 220 PM NATIONAL WEATHER SERVICE RADAR INDICATED SHOWER AND THUNDERSTORM ACTIVITY ON THE INCREASE ACROSS THE MOUNTAINS OF WESTERN NORTH CAROLINA. THE THUNDERSTORMS WERE SCATTERED FROM WATAUGA COUNTY IN THE NORTHERN MOUNTAINS DOWN THROUGH THE CENTRAL AND SOUTHERN MOUNTAINS TO CHEROKEE COUNTY OF THE EXTREME SOUTHWEST MOUNTAINS. MOVEMENT WAS SLOWLY TOWARD THE SOUTH. SOME OF THESE STORMS WILL PRODUCE HEAVY DOWNPOURS..DANGEROUS CLOUD TO GROUND LIGHTNING AND STRONG GUSTY WINDS. THE STORMS ARE MOVING SLOWLY SO THE HEAVY RAINS MAY CAUSE MINOR URBAN STREET FLOODING AS WELL AS FLOODING OF POORLY DRAINED LOW LYING AREAS. IF THREATENING WEATHER APPROACHES YOUR AREA SEEK SAFE SHELTER IMMEDIATELY. STAY TUNED TO YOUR NOAA WEATHER RADIO OR LOCAL RADIO OR TELEVISION FOR FUTHER STATEMENTS OR POSSIBLE WARNING ON THIS THUNDERSTORM ACTIVITY. COLE
Special weather statement, Aug 20, 2:30 PM EDT, 2 hours 8 minutes before
NCZ008-201930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHARLOTTE NC 230 PM EDT MON AUG 20 1990 ...THUNDERSTORMS DEVELOPING OVER NORTH CAROLINAS SOUTHERN PIEDMONT.. AT 230 PM EDT NATIONAL WEATHER SERVICE RADARS SHOWED SCATTERED THUNDERSTORMS OVER ANSON COUNTY. THESE THUNDERSTORMS HAD RAPIDLY DEVELOPED DURING THE PAST HOUR AND WERE INTENSIFYING. THE STORMS WERE SHOWING LITTLE TO NO MOVEMENT. THESE STORMS WILL LIKELY PRODUCE STRONG GUSTY WINDS .. HEAVY DOWNPOURS ... DEADLY LIGHTNING ... AND POSSIBLY SMALL HAIL. EVERYONE IN ANSON COUNTY SHOULD BE ALERT TO THESE STORMS AND BE PREPARED TO SEEK ADEQUATE SHELTER SHOULD THREATENING WEATHER APPROACH. THE NEXT STATEMENT WILL BE ISSUED AT 330 PM EDT UNLESS CONDITIONS WORSEN. MATT
Special weather statement, Aug 20, 3:00 PM EDT, 1 hour 38 minutes before
NCZ008-202000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHARLOTTE NC 300 PM EDT MON AUG 20 1990 ...THUNDERSTORMS INTENSIFYING OVER NORTH CAROLINAS SOUTHERN PIEDMONT... AT 300 PM EDT NATIONAL WEATHER SERVICE RADARS SHOWED STRENGTHENING THUNDERSTORMS BECOMING MORE NUMEROUS IN NUMBERS ACROSS NORTH CAROLINAS SOUTHERN PIEDMONT. THE HEAVIEST OF THESE STORMS WERE LOCATED OVER THE COUNTIES OF MECKLENBURG ... CLEVELAND ... GASTON ... AND ANSON. THESE STORMS HAD SHOWN LITTLE MOVEMENT DURING THE PAST HOUR. THESE STORMS WILL LIKELY PRODUCE STRONG GUSTY WINDS .. HEAVY DOWNPOURS ... DEADLY LIGHTNING ... AND HAIL. ADDITIONALLY... THE SLOW MOVEMENT OF THESE STORMS MAY PRODUCE LOCALIZED FLOODING OF STREETS AND LOW LYING AREAS THAT ARE SUSCEPTIBLE TO FLOODING DUE TO POOR DRAINAGE. EVERYONE IN THESE COUNTIES SHOULD BE ALERT TO THESE STORMS AND BE PREPARED TO SEEK ADEQUATE SHELTER SHOULD THREATENING WEATHER APPROACH. THE NEXT STATEMENT WILL BE ISSUED AT 400 PM EDT UNLESS CONDITIONS WORSEN. MATT
Special weather statement, Aug 20, 3:55 PM EDT, 43 minutes before
NCZ008-202055- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHARLOTTE NC 355 PM EDT MON AUG 20 1990 ...THUNDERSTORMS CONTINUE OVER NORTH CAROLINAS SOUTHERN PIEDMONT ... AT 355 PM EDT NATIONAL WEATHER SERVICE RADARS SHOWED THUNDERSTORMS OVER NORTH CAROLINAS SOUTHERN PIEDMONT. THE HEAVIEST OF THESE STORMS WERE LOCATED OVER THE COUNTIES OF CLEVELAND ... GASTON ... UNION ... AND MECKLENBURG COUNTIES. THESE STORMS WERE MOVING VERY SLOWLY TOWARDS THE SOUTH AT ABOUT 5 MPH. THESE STORMS WILL LIKELY PRODUCE STRONG GUSTY WINDS .. HEAVY DOWNPOURS ... DEADLY LIGHTNING ... AND HAIL. EVERYONE IN THESE COUNTIES SHOULD BE ALERT TO THESE STORMS AND BE PREPARED TO SEEK ADEQUATE SHELTER SHOULD YTHREATENING WEATHER APPROACH. THE NEXT STATEMENT WILL BE ISSUED AT 455 PM EDT UNLESS CONDITIONS WORSEN. MATT
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.