Alert archive / North Carolina / Tornado Watches in 1999

Tornado Watch 702

October 17, 199916 counties in North Carolina; Dillon County, Horry County, South Carolina

The Storm Prediction Center issued this tornado watch at Oct 17, 1999, 11:45 AM EDT for 16 counties in North Carolina; Dillon County, Horry County, South Carolina. It was in force for 11 hr.

The area

The outline as issued.

The facts

Issued
Oct 17, 1999, 11:45 AM EDT (15:45 UTC)
Expired
Oct 17, 1999, 11:00 PM EDT
In force
11 hr
Issued by
the Storm Prediction Center

Counties Beaufort County, NC, Bladen County, NC, Brunswick County, NC, Carteret County, NC, Columbus County, NC, Craven County, NC, Dare County, NC, Duplin County, NC, Hyde County, NC, Jones County, NC, Lenoir County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Tyrrell County, NC, Dillon County, SC, Horry County, SC

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Oct 17, 1:59 PM EDTFlash Flood WarningILMBladen, Brunswick, Columbus, Pender4 hr
Oct 17, 1:59 PM EDTFlash Flood WarningILMNew Hanover4 hr
Oct 17, 2:19 PM EDTFlash Flood WarningMHXBeaufort, Martin, Washington12 hr
Oct 17, 2:19 PM EDTFlash Flood WarningMHXGreene, Lenoir, Pitt12 hr
Oct 17, 2:19 PM EDTFlash Flood WarningMHXCarteret, Craven, Duplin, Jones, Onslow12 hr
Oct 17, 2:19 PM EDTFlash Flood WarningMHXPamlico12 hr
Oct 17, 6:00 PM EDTFlash Flood WarningILMBrunswick, New Hanover5 hr
Oct 17, 6:00 PM EDTFlash Flood WarningILMBladen, Columbus5 hr

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 3.8 hours before the alert went out and 74 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 1999-10-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 472 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 1999-10-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 297 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
472 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
454 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
297 m²/s²
0-3 km storm-relative helicity
335 m²/s²
Significant tornado parameter
0.5
Supercell composite
4.1

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, 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.