Alert archive / Virginia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 77, NWS Wakefield, VA

May 4, 1998Hanover County, Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at May 4, 1998, 6:45 PM EDT for Hanover County, Virginia. 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
May 4, 1998, 6:45 PM EDT (22:45 UTC)
Expired
May 4, 1998, 7:20 PM EDT
In force
35 min
Issued by
NWS Wakefield, VA
Area
Whole counties

County Hanover County, VA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 4, 4:00 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 10.8 hours before the alert went out and 188 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 1998-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1998-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
914 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
May 4, 2:54 PM EDTSevere Thunderstorm WarningAKQPrince Edward31 min
May 4, 4:07 PM EDTSevere Thunderstorm WarningAKQSouthampton33 min
May 4, 4:20 PM EDTSevere Thunderstorm WarningAKQCumberland30 min
May 4, 5:17 PM EDTSevere Thunderstorm WarningAKQGoochland33 min
May 4, 5:21 PM EDTSevere Thunderstorm WarningAKQYork34 min
May 4, 5:38 PM EDTSevere Thunderstorm WarningAKQNew Kent32 min
May 4, 5:43 PM EDTSevere Thunderstorm WarningAKQHanover32 min
May 4, 5:54 PM EDTSevere Thunderstorm WarningAKQKing William31 min
May 4, 6:04 PM EDTSevere Thunderstorm WarningAKQChesterfield36 min
May 4, 6:10 PM EDTSevere Thunderstorm WarningAKQHenrico, City of Richmond35 min
May 4, 6:12 PM EDTSevere Thunderstorm WarningAKQKing and Queen33 min
May 4, 6:24 PM EDTSevere Thunderstorm WarningAKQEssex36 min
May 4, 6:39 PM EDTSevere Thunderstorm WarningAKQCaroline36 min
May 4, 7:05 PM EDTSevere Thunderstorm WarningAKQEssex15 min
May 4, 7:15 PM EDTSevere Thunderstorm WarningAKQCaroline35 min
May 4, 3:52 PM EDTSevere Thunderstorm WarningAKQNorthampton28 min
May 4, 4:57 PM EDTSevere Thunderstorm WarningAKQHertford33 min

Nearby

Severe Thunderstorm Warnings in Virginia, 1998Every severe thunderstorm warning in 1998

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.