Alert archive / South Carolina / Tornado Watches in 1999
Tornado Watch 159
The Storm Prediction Center issued this tornado watch at Apr 15, 1999, 4:15 PM EDT for 18 counties in North Carolina; 30 counties in South Carolina. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 15, 1999, 4:15 PM EDT (20:15 UTC)
- Expired
- Apr 15, 1999, 10:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 48 counties
Anson County, NC, Bladen County, NC, Brunswick County, NC, Columbus County, NC, Cumberland County, NC, Duplin County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Moore County, NC, New Hanover County, NC, Pender County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Wake County, NC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Columbia radar (KCAE), 81 km from the middle of the area, began a volume at 20:18 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.
Warnings issued inside it
14 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 4:24 PM EDT | Severe Thunderstorm Warning | CHS | Hampton | 31 min |
| Apr 15, 4:38 PM EDT | Severe Thunderstorm Warning | CAE | Newberry | 52 min |
| Apr 15, 4:40 PM EDT | Tornado Warning | CHS | Colleton | 45 min |
| Apr 15, 5:39 PM EDT | Severe Thunderstorm Warning | CAE | Aiken | 36 min |
| Apr 15, 5:52 PM EDT | Tornado Warning | CAE | Aiken, Barnwell | 38 min |
| Apr 15, 6:26 PM EDT | Tornado Warning | CAE | Bamberg | 34 min |
| Apr 15, 7:16 PM EDT | Tornado Warning | CHS | Dorchester | 34 min |
| Apr 15, 7:42 PM EDT | Severe Thunderstorm Warning | ILM | Marlboro | 33 min |
| Apr 15, 8:01 PM EDT | Tornado Warning | ILM | Robeson | 34 min |
| Apr 15, 8:53 PM EDT | Severe Thunderstorm Warning | ILM | Bladen | 32 min |
| Apr 15, 9:00 PM EDT | Tornado Warning | ILM | Bladen | 20 min |
| Apr 15, 9:12 PM EDT | Severe Thunderstorm Warning | RAH | Sampson | 38 min |
| Apr 15, 9:26 PM EDT | Severe Thunderstorm Warning | MHX | Duplin | 49 min |
| Apr 15, 9:53 PM EDT | Tornado Warning | MHX | Duplin | 37 min |
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 12:00Z, 8.3 hours before the alert went out and 136 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 6:15 PM EDT | Tornado Watch | SPC | Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 30 more | 4 hr |
Nearby
Tornado Watches in South Carolina, 1999Tornado Watches in North Carolina, 1999Every tornado watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.