Alert archive / Tennessee / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 2, NWS Morristown, TN

April 30, 1990Sullivan County, Tennessee; Washington County, Virginia

NWS Morristown, TN issued this severe thunderstorm warning at Apr 30, 1990, 6:28 PM EDT for Sullivan County, Tennessee; Washington County, Virginia. It was in force for 47 min.

The area

The counties it named.

The facts

Issued: Apr 30, 1990, 6:28 PM EDT (22:28 UTC)
Expired: Apr 30, 1990, 7:15 PM EDT
In force: 47 min
Issued by: NWS Morristown, TN
Area: Whole counties

Counties Sullivan County, TN, Washington 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, 10.5 hours before the alert went out and 197 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KTRI 302228
SVRTRI
TNC163-VAC191-520-302315-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BRISTOL TN
628 PM EDT MON APR 30 1990
 
THE NATIONAL WEATHER SERVICE IN BRISTOL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST TENNESSEE
 
   ...SULLIVAN COUNTY
 
 
IN SOUTHWEST VIRGINIA
 
   ...WASHINGTON COUNTY
 
  AND THE INDEPENDENT CITY OF
 
   ...CITY OF BRISTOL
 
A SEVERE THUNDERSTORM WAS REPORTED BY THE BRISTOL VIRGINIA POLICE AT
625 PM. THIS THUNDERSTORM WAS PRODUCING GOLF BALL SIZE HAIL. THE STORM
WAS MOVING SOUTHEAST AT 30 MILES AN HOUR.
 
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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, 1 hour 53 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.

Issued	Product	Office	Counties	Lasted
Apr 30, 6:50 PM EDT	Severe Thunderstorm Warning	MRX	Johnson	40 min
Apr 30, 5:02 PM EDT	Severe Thunderstorm Warning	MRX	Tazewell	58 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 1990 Severe Thunderstorm Warnings in Virginia, 1990 Every 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.