Alert archive / South Carolina / Tornado Warnings in 1999
Tornado Warning 13, NWS Charleston, SC
NWS Charleston, SC issued this tornado warning at Apr 15, 1999, 4:40 PM EDT for Colleton County, South Carolina. It was in force for 45 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 15, 1999, 4:40 PM EDT (20:40 UTC)
- Expired
- Apr 15, 1999, 5:25 PM EDT
- In force
- 45 min
- Issued by
- NWS Charleston, SC
- Area
- Whole counties
County Colleton County, SC
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 15, 5:00 PM EDT | Tornado F1 | Ritter, SC | Roof damage occurred to a house and several outdoor buildings, along withn several trees uprooted or snapped off 15 to 20 feet above the ground. |
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 |
|---|---|---|---|
| Apr 15, 4:15 PM EDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 12:00Z, 8.7 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
- 148 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 695 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 286 m²/s²
- 0-3 km storm-relative helicity
- 347 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
999 WFUS1 KCHS 152041 RRA TORCHS SCC029-152125- BULLETIN...EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHARLESTON SC 440 PM EDT THU APR 15 1999 THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A * TORNADO WARNING FOR... COLLETON COUNTY IN SOUTH CAROLINA * UNTIL 525 PM EDT * AT 440 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO NEAR YEMASSEE...MOVING EAST-NORTHEAST AT 40 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... NEAR GREEN POND ON HIGHWAY 303 BETWEEN HIGHWAY 17 AND WALTERBORO. IF YOU ARE IN A MULTIPLE STORY BUILDING...GO TO A SMALL INTERIOR ROOM AWAY FROM WINDOWS. TJR/SLB
The office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 3:43 PM EDT | Tornado Warning | CHS | Hampton | 32 min |
| Apr 15, 3:51 PM EDT | Tornado Warning | CHS | Jasper | 34 min |
| Apr 15, 4:24 PM EDT | Severe Thunderstorm Warning | CHS | Hampton | 31 min |
| Apr 15, 4:32 PM EDT | Tornado Warning | CHS | Beaufort | 28 min |
| Apr 15, 5:13 PM EDT | Tornado Warning | CHS | Charleston | 32 min |
| Apr 15, 5:20 PM EDT | Severe Thunderstorm Warning | CHS | Jasper | 35 min |
| Apr 15, 5:26 PM EDT | Severe Thunderstorm Warning | CHS | Beaufort | 34 min |
| Apr 15, 5:56 PM EDT | Severe Thunderstorm Warning | CHS | Jasper | 49 min |
| Apr 15, 7:16 PM EDT | Tornado Warning | CHS | Dorchester | 34 min |
Nearby
Tornado Warnings in South Carolina, 1999Every tornado warning in 1999Tornadoes 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.