Alert archive / Virginia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 182, NWS Wakefield, VA

August 14, 1999Sussex County, Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Aug 14, 1999, 2:44 PM EDT for Sussex County, Virginia. It was in force for 36 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
Aug 14, 1999, 2:44 PM EDT (18:44 UTC)
Expired
Aug 14, 1999, 3:20 PM EDT
In force
36 min
Issued by
NWS Wakefield, VA
Area
Whole counties

County Sussex County, VA

The radar

The Norfolk radar (KAKQ), 24 km from the middle of the area, began a volume at 18:47 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

Roanoke, VA (KRNK), launched 12:00Z, 6.7 hours before the alert went out and 201 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, Roanoke, VA at 12:00Z on 1999-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 267 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, Roanoke, VA at 12:00Z on 1999-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 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
267 J/kg
Mixed-layer CIN
-100 J/kg
Mixed-layer LCL
937 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

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
Aug 14, 1:29 AM EDTSevere Thunderstorm WarningAKQLouisa36 min
Aug 14, 2:46 PM EDTSevere Thunderstorm WarningAKQSouthampton29 min
Aug 14, 3:24 PM EDTSevere Thunderstorm WarningAKQLouisa31 min
Aug 14, 4:30 PM EDTSevere Thunderstorm WarningAKQBrunswick, Mecklenburg50 min
Aug 14, 5:06 PM EDTSevere Thunderstorm WarningAKQGreensville, City of Emporia34 min
Aug 14, 5:15 PM EDTSevere Thunderstorm WarningAKQCity of Suffolk35 min
Aug 14, 5:34 PM EDTSevere Thunderstorm WarningAKQKing and Queen, King William31 min
Aug 14, 5:42 PM EDTSevere Thunderstorm WarningAKQCity of Chesapeake33 min
Aug 14, 5:51 PM EDTSevere Thunderstorm WarningAKQSouthampton, City of Franklin34 min
Aug 14, 5:56 PM EDTSevere Thunderstorm WarningAKQEssex, Richmond34 min
Aug 14, 6:06 PM EDTSevere Thunderstorm WarningAKQNorthumberland, Westmoreland29 min
Aug 14, 7:05 PM EDTFlash Flood WarningAKQCity of Chesapeake, City of Norfolk, City of Portsmouth115 min
Aug 14, 7:05 PM EDTFlash Flood WarningAKQCity of Virginia Beach115 min
Aug 14, 5:36 PM EDTSevere Thunderstorm WarningAKQNorthampton34 min
Aug 14, 3:11 AM EDTSevere Thunderstorm WarningAKQDorchester34 min

Nearby

Severe Thunderstorm Warnings in Virginia, 1999Every severe thunderstorm warning 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.