Alert archive / South Carolina / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 11, NWS Columbia, SC
NWS Columbia, SC issued this severe thunderstorm warning at Apr 8, 1999, 5:24 PM EDT for McCormick County, South Carolina. It was in force for 66 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
- Apr 8, 1999, 5:24 PM EDT (21:24 UTC)
- Expired
- Apr 8, 1999, 6:30 PM EDT
- In force
- 66 min
- Issued by
- NWS Columbia, SC
- Area
- Whole counties
County McCormick County, SC
The radar
The Greer radar (KGSP), 110 km from the middle of the area, began a volume at 21:25 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 8, 6:07 PM EDT | Hail 0.75 | Mc Cormick, SC | Sheriff reported dime size hail. |
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.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.4 hours before the alert went out and 211 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
- 794 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 904 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
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, Apr 8, 5:10 PM EDT, 14 minutes before
SCZ015-016-018-020-021-022-025-026-027-028-029-030-031-035-036- 037-038-041-GAZ040-063-064-065-077-090400- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE COLUMBIA SC 510 PM EDT THU APR 8 1999 THE SEVERE WEATHER OUTLOOK PERTAINS TO THE FOLLOWING COUNTIES IN SOUTH CAROLINA: AIKEN BAMBERG BARNWELL CALHOUN CHESTERFIELD CLARENDON EDGEFIELD FAIRFIELD KERSHAW LANCASTER LEE LEXINGTON MCCORMICK NEWBERRY ORANGEBURG RICHLAND SALUDA SUMTER THE SEVERE WEATHER OUTLOOK PERTAINS TO THE FOLLOWING COUNTIES IN GEORGIA: BURKE COLUMBIA LINCOLN MCDUFFIE RICHMOND THUNDERSTORMS WILL BE WIDELY SCATTERED IN THE OUTLOOK AREA LATE THIS AFTERNOON AND EVENING. AFTERNOON TEMPERATURES IN THE 85 TO 90 DEGREE RANGE AND AN UPPER-LEVEL DISTURBANCE MOVING INTO THE AREA WILL HELP CAUSE THE THUNDERSTORMS. EXPECT WIND GUSTS NEAR 40 MPH...FREQUENT LIGHTNING...HEAVY DOWNPOURS... AND SMALL HAIL WITH THE THUNDERSTORMS. SOME OF THE THUNDERSTORMS COULD BECOME SEVERE WITH WIND GUSTS NEAR 60 MPH AND HAIL TO 1 INCH IN DIAMETER. EMERGENCY MANAGEMENT AND SPOTTER ACTIVATION IS NOT EXPECTED SINCE ANY SEVERE WEATHER IS EXPECTED TO BE VERY ISOLATED. HOWEVER...ALL INTERESTS ARE URGED TO LISTEN FOR LATER STATEMENTS OR POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. REMEMBER...A SMALL INTERIOR ROOM ON THE LOWEST FLOOR USUALLY OFFERS THE BEST PROTECTION FROM SEVERE THUNDERSTORMS. RJL
Special weather statement, Apr 8, 5:10 PM EDT, 14 minutes before
SCZ015-016-018-020-021-022-025-026-027-028-029-030-031-035-036- 037-038-041-GAZ040-063-064-065-077-090400- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE COLUMBIA SC 510 PM EDT THU APR 8 1999 THE SEVERE WEATHER OUTLOOK PERTAINS TO THE FOLLOWING COUNTIES IN SOUTH CAROLINA: AIKEN BAMBERG BARNWELL CALHOUN CHESTERFIELD CLARENDON EDGEFIELD FAIRFIELD KERSHAW LANCASTER LEE LEXINGTON MCCORMICK NEWBERRY ORANGEBURG RICHLAND SALUDA SUMTER THE SEVERE WEATHER OUTLOOK PERTAINS TO THE FOLLOWING COUNTIES IN GEORGIA: BURKE COLUMBIA LINCOLN MCDUFFIE RICHMOND THUNDERSTORMS WILL BE WIDELY SCATTERED IN THE OUTLOOK AREA LATE THIS AFTERNOON AND EVENING. AFTERNOON TEMPERATURES IN THE 85 TO 90 DEGREE RANGE AND AN UPPER-LEVEL DISTURBANCE MOVING INTO THE AREA WILL HELP CAUSE THE THUNDERSTORMS. EXPECT WIND GUSTS NEAR 40 MPH...FREQUENT LIGHTNING...HEAVY DOWNPOURS... AND SMALL HAIL WITH THE THUNDERSTORMS. SOME OF THE THUNDERSTORMS COULD BECOME SEVERE WITH WIND GUSTS NEAR 60 MPH AND HAIL TO 1 INCH IN DIAMETER. EMERGENCY MANAGEMENT AND SPOTTER ACTIVATION IS NOT EXPECTED SINCE ANY SEVERE WEATHER IS EXPECTED TO BE VERY ISOLATED. HOWEVER...ALL INTERESTS ARE URGED TO LISTEN FOR LATER STATEMENTS OR POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. REMEMBER...A SMALL INTERIOR ROOM ON THE LOWEST FLOOR USUALLY OFFERS THE BEST PROTECTION FROM SEVERE THUNDERSTORMS. RJL
The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 6:25 PM EDT | Severe Thunderstorm Warning | CAE | Edgefield | 35 min |
| Apr 8, 6:35 PM EDT | Severe Thunderstorm Warning | CAE | Aiken | 40 min |
| Apr 8, 6:45 PM EDT | Severe Thunderstorm Warning | CAE | Barnwell | 45 min |
| Apr 8, 7:27 PM EDT | Tornado Warning | CAE | Barnwell | 33 min |
| Apr 8, 7:59 PM EDT | Severe Thunderstorm Warning | CAE | Bamberg | 31 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 1999Every severe thunderstorm warning in 1999
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; radar from the NEXRAD Level II archive.