Alert archive / Tennessee / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 39, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Aug 9, 1990, 7:43 PM EDT for Anderson County, Roane County, Tennessee. It was in force for 32 min.
The area
The counties it named.
The facts
- Issued
- Aug 9, 1990, 7:43 PM EDT (23:43 UTC)
- Expired
- Aug 9, 1990, 8:15 PM EDT
- In force
- 32 min
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
Counties Anderson County, TN, Roane County, TN
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
Nashville Metro, TN (KBNA), launched 12:00Z, 11.7 hours before the alert went out and 202 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.
- Mixed-layer CAPE
- 1412 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 675 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTYS 092345 SVRTYS TNC001-145-100015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE KNOXVILLE TN 743 PM EDT THU AUG 9 1990 THE NATIONAL WEATHER SERVICE IN KNOXVILLE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 815 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST CENTRAL TENNESSEE ...ANDERSON COUNTY...ROANE COUNTY RADAR INDICATES TWO SEVERE THUNDERSTORMS ONE IN ANDERSON COUNTY NEAR OAK RIDGE AND ONE IN ROANE COUNTY NEAR KINGSTON. THESE THUNDERSTORMS HAVE HAD SMALL HAIL AND STRONG WINDS AS WELL AS HEAVY RAIN AND DANGEROUS LLIGHTNING. THE THUNDERSTORMS ARE MMOVING VERY SLOWLY TO THE NORTHEAST. 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, Aug 9, 2:30 PM EDT, 5 hours 13 minutes before
TRI CITY TENNESSEE SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE BRISTOL TN 130 PM EDT THU AUG 9 1990 A FLASH FLOOD WATCH IS IN EFFECT FOR PORTIONS OF SOUTHWESTERN VIRGINIA. AT 130 PM...ISOLATED THUNDERSHOWERS WERE NORTH OF BECKLEY WEST VIRGINIA...SOUTHEAST OF JACKSON KENTUCKY...AND NORTH OF HARRIMAN TENNESSEE.
Special weather statement, Aug 9, 3:25 PM EDT, 4 hours 18 minutes before
TRI CITY TENNESSEE SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE BRISTOL TN 225 PM EDT THU AUG 9 1990 A FLASH FLOOD WATCH IS IN EFFECT FOR PORTIONS OF SOUTHWESTERN VIRGINIA. AT 225 PM...ISOLATED THUNDERSTORMS WERE OVER EAST TENNESSEE FROM HARRIMAN EAST...OVER NORTHEAST KENTUCKY...OVER SOUTHERN WEST VIRGINIA...AND OVER SOUTHWESTERN VIRGINIA NEAR THE KENTUCKY STATE LINE.
Special weather statement, Aug 9, 6:46 PM EDT, 57 minutes before
TNZ005-006-100045 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHATTANOOGA TENNESSEE 645 PM EDT THU AUG 9 1990 ...ISOLATED STRONG THUNDERSTORMS IN SOUTHEAST TENNESSEE... AT 640 PM EDT WEATHER RADAR INDICATED ISOLATED STRONG THUNDERSTORMS IN VAN BUREN AND BLEDSOE COUNTIES OF SOUTHEAST TENNESSEE. THE STRONGEST STORM WAS LOCATED JUST NORTH OF PIKEVILLE. IF YOU LIVE IN THESE AREAS BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AND PREPARE TO TAKE SHELTER IF THREATENING WEATHER APPROACHES. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...DANGEROUS LIGHTNING...STRONG GUSTY WINDS AND POSSIBLY SOME SMALL HAIL. THESE THUNDERSTORMS ARE MOVING SLOWLY TO THE SOUTH AND WILL MOVE INTO SEQUATCHIE AND RHEA COUNTIES IN THE NEXT FEW HOURS.
Nearby
Severe Thunderstorm Warnings in Tennessee, 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.