Alert archive / South Carolina / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 47, NWS Columbia, SC
NWS Columbia, SC issued this severe thunderstorm warning at May 6, 1999, 3:28 PM EDT for Chesterfield County, South Carolina. It was in force for 32 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 6, 1999, 3:28 PM EDT (19:28 UTC)
- Expired
- May 6, 1999, 4:00 PM EDT
- In force
- 32 min
- Issued by
- NWS Columbia, SC
- Area
- Whole counties
County Chesterfield County, SC
The radar
The Columbia radar (KCAE), 117 km from the middle of the area, began a volume at 19:28 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 |
|---|---|---|---|
| May 6, 3:55 PM EDT | Thunderstorm Wind 50 | Chesterfield, SC | Police reported trees down. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 6, 12:00 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 6, 3:00 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.5 hours before the alert went out and 162 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
- 209 J/kg
- Mixed-layer CIN
- -304 J/kg
- Mixed-layer LCL
- 551 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 53 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 KCAE 061927 RRA SVRCAE SCC025-062000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE COLUMBIA SC 328 PM EDT THU MAY 6 1999 THE NATIONAL WEATHER SERVICE IN COLUMBIA SC HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CHESTERFIELD COUNTY IN SOUTH CAROLINA * UNTIL 400 PM EDT * AT 327 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES WEST-SOUTHWEST OF MOUNT CROGHAN. THE STORM WAS MOVING TOWARD THE EAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... MOUNT CROGHAN AT 331 PM EDT RUBY AT 335 PM EDT WEXFORD AT 337 PM EDT CHESTERFIELD AT 342 PM EDT 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.
The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 2:00 PM EDT | Severe Thunderstorm Warning | CAE | Edgefield, McCormick | 30 min |
| May 6, 2:06 PM EDT | Severe Thunderstorm Warning | CAE | Edgefield, McCormick | 39 min |
| May 6, 2:10 PM EDT | Severe Thunderstorm Warning | CAE | Richland | 35 min |
| May 6, 2:15 PM EDT | Severe Thunderstorm Warning | CAE | Saluda | 45 min |
| May 6, 2:19 PM EDT | Severe Thunderstorm Warning | CAE | Lancaster | 41 min |
| May 6, 2:24 PM EDT | Severe Thunderstorm Warning | CAE | Lee | 51 min |
| May 6, 2:37 PM EDT | Severe Thunderstorm Warning | CAE | Kershaw | 53 min |
| May 6, 2:44 PM EDT | Severe Thunderstorm Warning | CAE | Aiken | 46 min |
| May 6, 2:57 PM EDT | Severe Thunderstorm Warning | CAE | Lexington, Newberry | 48 min |
| May 6, 3:03 PM EDT | Severe Thunderstorm Warning | CAE | Fairfield | 42 min |
| May 6, 3:07 PM EDT | Severe Thunderstorm Warning | CAE | Richland | 68 min |
| May 6, 3:13 PM EDT | Severe Thunderstorm Warning | CAE | Lee | 47 min |
| May 6, 3:24 PM EDT | Severe Thunderstorm Warning | CAE | Calhoun, Orangeburg | 51 min |
| May 6, 3:34 PM EDT | Severe Thunderstorm Warning | CAE | Kershaw | 41 min |
| May 6, 3:42 PM EDT | Severe Thunderstorm Warning | CAE | Sumter | 63 min |
| May 6, 3:57 PM EDT | Tornado Warning | CAE | Sumter | 48 min |
| May 6, 4:09 PM EDT | Severe Thunderstorm Warning | CAE | Lee | 51 min |
| May 6, 4:13 PM EDT | Tornado Warning | CAE | Kershaw, Lee | 47 min |
| May 6, 4:26 PM EDT | Severe Thunderstorm Warning | CAE | Clarendon | 49 min |
| May 6, 4:29 PM EDT | Severe Thunderstorm Warning | CAE | Chesterfield | 46 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.