Alert archive / Virginia / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 145, NWS Wakefield, VA

August 4, 1997Lancaster County, Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Aug 4, 1997, 2:53 PM EDT for Lancaster County, Virginia. It was in force for 47 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 4, 1997, 2:53 PM EDT (18:53 UTC)
Expired
Aug 4, 1997, 3:40 PM EDT
In force
47 min
Issued by
NWS Wakefield, VA
Area
Whole counties

County Lancaster County, VA

The radar

The Norfolk radar (KAKQ), 95 km from the middle of the area, began a volume at 18:53 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 watch it was issued in

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

IssuedProductOfficeLasted
Aug 4, 12:45 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.9 hours before the alert went out and 199 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, Phillips Aaf/Abe, MD at 12:00Z on 1997-08-04Temperature 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, Phillips Aaf/Abe, MD at 12:00Z on 1997-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 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
1323 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
144 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
Aug 4, 12:36 PM EDTSevere Thunderstorm WarningAKQLouisa49 min
Aug 4, 1:19 PM EDTSevere Thunderstorm WarningAKQHanover31 min
Aug 4, 1:47 PM EDTSevere Thunderstorm WarningAKQHanover, King William48 min
Aug 4, 2:00 PM EDTSevere Thunderstorm WarningAKQPrince Edward35 min
Aug 4, 2:31 PM EDTSevere Thunderstorm WarningAKQEssex, Richmond34 min
Aug 4, 3:13 PM EDTSevere Thunderstorm WarningAKQCharles City, James City32 min
Aug 4, 4:07 PM EDTSevere Thunderstorm WarningAKQAccomack, Northampton48 min
Aug 4, 4:15 PM EDTSevere Thunderstorm WarningAKQNorthampton50 min

Nearby

Severe Thunderstorm Warnings in Virginia, 1997Every severe thunderstorm warning in 1997

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.