Alert archive / Tennessee / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 40, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Aug 9, 1990, 8:01 PM EDT for Blount County, Knox County, Tennessee. It was in force for 29 min.
The area
The counties it named.
The facts
- Issued
- Aug 9, 1990, 8:01 PM EDT (00:01 UTC)
- Expired
- Aug 9, 1990, 8:30 PM EDT
- In force
- 29 min
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
Counties Blount County, TN, Knox 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
Athens Municipal, GA (KAHN), launched 00:00Z, 0.0 hours before the alert went out and 218 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
- 1510 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1228 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.8
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, Aug 9, 2:30 PM EDT, 5 hours 31 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 36 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, 1 hour 15 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.