Alert archive / South Carolina / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 47, NWS Columbia, SC
NWS Columbia, SC issued this severe thunderstorm warning at Aug 29, 1990, 9:15 PM EDT for Florence County, South Carolina. It was in force for 45 min.
The area
The counties it named.
The facts
- Issued
- Aug 29, 1990, 9:15 PM EDT (01:15 UTC)
- Expired
- Aug 29, 1990, 10:00 PM EDT
- In force
- 45 min
- Issued by
- NWS Columbia, SC
- Area
- Whole counties
County Florence 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 128 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
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, Aug 29, 6:34 PM EDT, 2 hours 41 minutes before
SCZ001>007-292330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA SC 634 PM EDT WED AUG 29 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR PARTS OF NORTHERN AND CENTRAL SOUTH CAROLINA UNTIL 10 PM EDT... ...THUNDERSTORMS WITH HEAVY RAIN OVER NORTHERN SOUTH CAROLINA... AT 629 PM EDT A THUNDERSTORM WITH HEAVY RAIN WAS LOCATED 15 MILES NORTHEAST OF CAMDEN. THIS THUNDERSTORM WAS MOVING SOUTHEAST AT 20 MPH. IN ADDITION TO HEAVY RAIN...THIS THUNDERSTORM WILL PRODUCE DANGEROUS LIGHTNING...AND POSSIBLY GUSTY WINDS AND SOME HAIL. HEAVY RAIN FROM THIS THUNDERSTORM MAY CAUSE PONDING OF WATER ON ROADS...SO DRIVERS SHOULD BE ALERT. ALSO AT 629 PM EDT...A THUNDERSTORM WITH HEAVY RAIN WAS LOCATED 5 MILES EAST OF LAURENS...AND MOVING SOUTHEAST AT 20 MPH. BY 730 PM EDT THESE THUNDERSTORMS WILL BE LOCATED 10 MILES NORTHEAST OF BISHOPVILLE AND 5 MILES NORTH OF NEWBERRY. ZIMMERMAN
Special weather statement, Aug 29, 7:02 PM EDT, 2 hours 13 minutes before
GAZ007-SCZ004-006-300030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUGUSTA GA 705 PM EDT WED AUG 29 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 10 PM FOR LINCOLN...WILKES... COLUMBIA...MCDUFFIE...WARREN AND RICHMOND COUNTIES IN GEORGIA AND EDGEFIELD...MCCORMICK AND AIKEN COUNTIES IN SOUTH CAROLINA... AT 650 PM NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF SCATTERED THUNDERSTORMS OVER THE SOUTH CAROLINA PIDMONTS AND MIDLANDSz. THE STORMS WERE MOSTLY EAST OF A GREENWOOD-CALHOUN LINE. THESE THUNDERSTORMS ARE MOVING SOUTHEAST 20 MPH. ELSEWHERE WIDELY SCATTERED SHOWERS WERE OCCURRING IN SOUTHEAST GEORGIA FROM NEAR SYLVANIA TO EAST OF ALMA.
Local storm report, Aug 29, 7:33 PM EDT, 1 hour 42 minutes before
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</html>The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 8:20 PM EDT | Severe Thunderstorm Warning | CAE | Clarendon, Sumter | 55 min |
| Aug 30, 7:03 PM EDT | Severe Thunderstorm Warning | CAE | Calhoun, Lexington | 57 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.