Alert archive / Virginia / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 1, NWS Morristown, TN

April 30, 1990Tazewell County, Virginia

NWS Morristown, TN issued this severe thunderstorm warning at Apr 30, 1990, 5:02 PM EDT for Tazewell County, Virginia. It was in force for 58 min.

The area

The counties it named.

The facts

Issued
Apr 30, 1990, 5:02 PM EDT (21:02 UTC)
Expired
Apr 30, 1990, 6:00 PM EDT
In force
58 min
Issued by
NWS Morristown, TN
Area
Whole counties

County Tazewell County, VA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Huntington/Tri S, WV (KHTS), launched 12:00Z, 9.0 hours before the alert went out and 161 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, Huntington/Tri S, WV at 12:00Z on 1990-04-30Temperature 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, Huntington/Tri S, WV at 12:00Z on 1990-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 129 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
1603 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
129 m²/s²
0-3 km storm-relative helicity
203 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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 30, 4:35 PM EDT, 27 minutes before
TNZ001-302200-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE BRISTOL TN
427 PM EDT MON APR 30 1990

...SEVERE THUNDERSTORM WATCH UNTIL 10PM FOR UPPER EAST TENNESSEE
AND SOUTHWESTE

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 6:28 PM EDTSevere Thunderstorm WarningMRXSullivan47 min
Apr 30, 6:50 PM EDTSevere Thunderstorm WarningMRXJohnson40 min

Nearby

Severe Thunderstorm Warnings in Virginia, 1990Every severe thunderstorm warning in 1990

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.