Alert archive / Virginia / Tornado Warnings in 1999

Tornado Warning 26, NWS Wakefield, VA

October 17, 1999City of Chesapeake, Virginia; Currituck County, North Carolina

NWS Wakefield, VA issued this tornado warning at Oct 17, 1999, 6:40 PM EDT for City of Chesapeake, Virginia; Currituck County, North Carolina. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 17, 1999, 6:40 PM EDT (22:40 UTC)
Expired
Oct 17, 1999, 7:15 PM EDT
In force
35 min
Issued by
NWS Wakefield, VA
Area
Whole counties

Counties Currituck County, NC, City of Chesapeake, VA

The radar

The Norfolk radar (KAKQ), 94 km from the middle of the area, began a volume at 22:39 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.

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 10.7 hours before the alert went out and 206 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.

The office that day

Everything else NWS Wakefield, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 17, 6:30 PM EDTFlash Flood WarningAKQIsle of Wight, Southampton, City of Suffolk2 hr
Oct 17, 6:30 PM EDTFlash Flood WarningAKQCity of Franklin2 hr
Oct 17, 7:16 PM EDTFlash Flood WarningAKQCity of Chesapeake, City of Norfolk, City of Portsmouth, City of Virginia Beach119 min
Oct 17, 4:26 PM EDTFlash Flood WarningAKQPasquotank2 hr
Oct 17, 6:30 PM EDTFlash Flood WarningAKQChowan, Perquimans2 hr
Oct 17, 6:30 PM EDTFlash Flood WarningAKQBertie, Northampton2 hr
Oct 17, 6:30 PM EDTFlash Flood WarningAKQPasquotank2 hr

Nearby

Tornado Warnings in Virginia, 1999Tornado Warnings in North 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.