Alert archive / North Carolina / Tornado Watches in 1999

Tornado Watch 684

September 15, 1999Screven County, Georgia; 33 counties in North Carolina; 16 counties in South Carolina

The Storm Prediction Center issued this tornado watch at Sep 15, 1999, 10:00 AM EDT for Screven County, Georgia; 33 counties in North Carolina; 16 counties in South Carolina. It was in force for 12 hr.

The area

The outline as issued.

The facts

Issued
Sep 15, 1999, 10:00 AM EDT (14:00 UTC)
Expired
Sep 15, 1999, 10:00 PM EDT
In force
12 hr
Issued by
the Storm Prediction Center
All 50 counties

Screven County, GA, Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Camden County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Currituck County, NC, Duplin County, NC, Edgecombe County, NC, Gates County, NC, Greene County, NC, Hertford County, NC, Johnston County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, New Hanover County, NC, Northampton County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Robeson County, NC, Sampson County, NC, Tyrrell County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Allendale County, SC, Bamberg County, SC, Berkeley County, SC, Charleston County, SC, Clarendon County, SC, Colleton County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Marion County, SC, Orangeburg County, SC, Sumter County, SC, Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 67 km from the middle of the area, began a volume at 14:02 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

34 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Sep 15, 10:16 AM EDTTornado WarningILMBrunswick, New Hanover29 min
Sep 15, 12:07 PM EDTTornado WarningMHXOnslow38 min
Sep 15, 12:53 PM EDTTornado WarningMHXOnslow37 min
Sep 15, 2:35 PM EDTFlash Flood WarningILMBrunswick, New Hanover, Pender5 hr
Sep 15, 2:35 PM EDTFlash Flood WarningILMBladen, Columbus5 hr
Sep 15, 2:35 PM EDTTornado WarningMHXOnslow40 min
Sep 15, 2:35 PM EDTFlash Flood WarningILMGeorgetown, Horry5 hr
Sep 15, 2:42 PM EDTTornado WarningILMBrunswick, New Hanover33 min
Sep 15, 3:07 PM EDTTornado WarningILMNew Hanover33 min
Sep 15, 3:23 PM EDTSevere Thunderstorm WarningILMBrunswick, Columbus22 min
Sep 15, 3:23 PM EDTTornado WarningILMBrunswick22 min
Sep 15, 3:50 PM EDTTornado WarningMHXPamlico40 min
Sep 15, 4:08 PM EDTTornado WarningMHXOnslow22 min
Sep 15, 5:13 PM EDTFlash Flood WarningMHXDuplin, Jones, Lenoir, Onslow12 hr
Sep 15, 5:13 PM EDTFlash Flood WarningMHXCarteret, Craven12 hr
Sep 15, 5:13 PM EDTFlash Flood WarningMHXGreene, Pitt12 hr
Sep 15, 5:13 PM EDTFlash Flood WarningMHXBeaufort, Martin, Washington12 hr
Sep 15, 5:13 PM EDTFlash Flood WarningMHXPamlico12 hr
Sep 15, 6:15 PM EDTTornado WarningMHXBeaufort30 min
Sep 15, 7:01 PM EDTTornado WarningMHXWashington29 min
Sep 15, 7:09 PM EDTTornado WarningMHXPamlico36 min
Sep 15, 7:29 PM EDTTornado WarningMHXBeaufort, Pamlico31 min
Sep 15, 7:34 PM EDTTornado WarningAKQBertie16 min
Sep 15, 7:45 PM EDTFlash Flood WarningILMColumbus, Robeson6 hr
Sep 15, 7:45 PM EDTFlash Flood WarningILMBladen, Brunswick, New Hanover, Pender6 hr
Sep 15, 7:45 PM EDTFlash Flood WarningILMGeorgetown6 hr
Sep 15, 7:48 PM EDTTornado WarningAKQBertie17 min
Sep 15, 8:03 PM EDTTornado WarningMHXCraven, Pitt27 min
Sep 15, 8:25 PM EDTTornado WarningMHXPamlico35 min
Sep 15, 8:54 PM EDTFlash Flood WarningAKQBertie, Hertford, Northampton6 hr
Sep 15, 8:54 PM EDTFlash Flood WarningAKQGates6 hr
Sep 15, 8:55 PM EDTFlash Flood WarningRAHEdgecombe, Johnston, Nash, Wayne, Wilson12 hr
Sep 15, 8:55 PM EDTFlash Flood WarningRAHCumberland, Harnett, Sampson12 hr
Sep 15, 9:50 PM EDTTornado WarningMHXPitt25 min

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 2.0 hours before the alert went out and 213 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.

Skew-T log-pSkew-T log-p diagram, Newport, NC at 12:00Z on 1999-09-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 392 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Newport, NC at 12:00Z on 1999-09-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 177 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
392 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
956 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
177 m²/s²
0-3 km storm-relative helicity
266 m²/s²
Significant tornado parameter
0.2
Supercell composite
5.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

Nearby

Tornado Watches in North Carolina, 1999Tornado Watches in South Carolina, 1999Tornado Watches in Georgia, 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.