Alert archive / Tennessee / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 41, NWS Morristown, TN

August 21, 1990Fentress County, Morgan County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Aug 21, 1990, 7:26 PM CDT for Fentress County, Morgan County, Tennessee. It was in force for 64 min.

The area

The counties it named.

The facts

Issued
Aug 21, 1990, 7:26 PM CDT (00:26 UTC)
Expired
Aug 21, 1990, 8:30 PM CDT
In force
64 min
Issued by
NWS Morristown, TN
Area
Whole counties

Counties Fentress County, TN, Morgan 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 00:00Z, 0.4 hours before the alert went out and 163 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, Nashville Metro, TN at 00:00Z on 1990-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1489 joules per kilogram.LCLLFCEL10008507005003002001001 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, Nashville Metro, TN at 00:00Z on 1990-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -62 square meters per square second.1939Sfc1 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
1489 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1678 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-62 m²/s²
0-3 km storm-relative helicity
-40 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 KTYS 220026
SVRTYS
TNC049-129-220130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KNOXVILLE TN
826 PM EDT (726 PM CDT) TUE AUG 21 1990
 
THE NATIONAL WEATHER SERVICE IN KNOXVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  930 PM EDT (830 PM CDT)
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL TENNESSEE
 
   ...SOUTHERN FENTRESS COUNTY...MORGAN COUNTY
 
AT 715 PM CDT A SEVERE THUNDERSTORM WAS IN SOUTHWEST FENTRESS COUNTY
MOVING TO THE ENE AT 15 MPH. THIS STORM KNOCKED DOWN NUMEROUS TREES
AND POWER LINES IN SOUTHERN OVERTON COUNTY.
 
 
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.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.

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 21, 5:19 PM CDT, 2 hours 7 minutes before
GAZ001-TNZ003-005-006-230000-

SPECIAL WEATHER STATEMENT...CORRECTION...TIME
NATIONAL WEATHER SERVICE CHATTANOOGA TN
615 PM EDT TUE AUG 21 1990

...A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL 10PM EDT
   FOR SOUTHEAST TENNESSEE AND NORTHWEST GEORIGA...

AT 610PM EDT WEATHER RADAR CONTINUED TO INDICATE STRONG THUNDERSTORMS
OVER NORTHERN RHEA COUNTY AND NORTHEAST BLEDSOE COUNTY BOTH IN SOUTHEAST
TENNESSEE.  THESE THUNDERSTORMS WERE MOVING VERY SLOWLY TOWARD THE
NORTHEAST.

ELSEWHERE SCATTERED SHOWERS AND THUNDERSHOWERS CONTINUED OVER SOUTHEAST
TENNESSEE AND UPPER NORTHWEST GEORGIA.

IF A THUNDERSTORM DEVELOPS IN YOUR AREA TAKE STEPS FOR SAFETY OF
SELF AND PROPERTY.
Special weather statement, Aug 21, 5:28 PM CDT, 1 hour 58 minutes before
TNZ001>005-016-VAZ008-009-013>016-KYZ006>009-WVZ003-004-006>008
NCZ006>013-SCZ001>004-GAZ002-212330-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE BRISTOL TN
625 PM EDT TUE AUG 21 1990

 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 10 PM EDT FOR
MOST OF NORTHEAST TENNESSEE...

AT 625 PM...THUNDERSTORMS WITH VERY HEAVY RAIN WERE JUST WEST OF
KINGSPORT TENNESSEE...OVER MOST OF EASTERN KENTUCKY...OVER
NORTHERN SOUTH CAROLINA...AND SOUTH OF ASHEVILLE NORTH CAROLINA.
MOST OF THE THUNDERSTORMS OVER SOUTHWESTERN NORTH CAROLINA HAVE
DECREASED IN INTENSITY DURING THE PAST HOUR.

SOME OF THE THUNDERSTORMS COULD PRODUCE STRONG GUSTY WINDS...
FREQUENT LIGHTNING...AND POSSIBLE HAIL.

THE THUNDERSTORMS WERE MOVING EAST AT 25 MILES AN HOUR.
Local storm report, Aug 21, 5:36 PM CDT, 1 hour 50 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHATTANOOGA TN
635 PM EDT TUE AUG 21 1990

...NORTHWEST GEORGIA...

COUNTY..................WALKER
SOURCE..................WALKER COUNTY ROAD DEPARTMENT
TIME....................ABOUT 540 PM EDT
LOCATION................NEAR THE LOOKOUT COMMUNITY IN THE EXTREME
                        SOUTHWEST PART OF WALKER COUNTY AND NEAR
                        THE VILLANOW COMMUNITY IN THE EXTREME
                        SOUTHEAST PART OF WALKER COUNTY
STORM TYPE..............THUNDERSTORM/WIND
DAMAGE..................TREES BLOWN DOWN AT BOTH LOCATIONS
INJURIES................NONE KNOWN
Special weather statement, Aug 21, 6:15 PM CDT, 1 hour 11 minutes before
TNZ001>006-016-230000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KNOXVILLE TN
715 PM EDT MON AUG 21 1990

 A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR ALL OF EAST TENNESSEE
UNTILL 10 PM EDT.
STRONG THUNDERSTORMS ARE CURRENTLY MOVING THROUGH SCOTT AND FENTRESS COUNTIES
OF EAST TENNESSEE.
THE SCOTT COUNTY SHERIFF REPORTED HEAVY RAIN AND PEA SIZED HAIL AT
ABOUT 7 PM EDT.

RESIDENTS IN SCOTT AND FENTRESS COUNTIES SHOULD STAY ALERT AS THESE
THUNDERSTORMS MOVE THROUGH THESE COUNTIES.

THE THUNDERSTORMS ARE MOVING EAST NORTHEAST AT ABOUT 10 MPH.

STAY TUNED TO THE NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TELEVISION
STATION FOR FURTHER STATEMENTS IF NEEDED.

5
Special weather statement, Aug 21, 6:31 PM CDT, 55 minutes before
TNZ001>005-016-VAZ008-009-013>016-KYZ006>009-WVZ003-004-006>008
NCZ006>013-SCZ001>004-GAZ002-220030-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE BRISTOL TN
725 PM EDT TUE AUG 21 1990

 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 10 PM EDT FOR
MOST OF NORTHEAST TENNESSEE...

AT 725 PM...NUMEROUS THUNDERSTORMS WITH VERY HEAVY RAIN WERE
OVER SOUTHEAST KENTUCKY. SCATTERED SHOWERS AND THUNDERSTORMS
WERE OVER NORTHEAST TENNESSIEE FROM KNOXVILLE EAST...OVER THE
SOUTHERN PIEDMONT OF NORTH CAROLINA AND OVER NORTHERN SOUTH
CAROLINA.
Special weather statement, Aug 21, 7:08 PM CDT, 18 minutes before
GAZ001-TNZ003-005-006-230200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHATTANOOGA TN
800 PM EDT TUE AUG 21 1990

...A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL 10PM EDT
   FOR SOUTHEAST TENNESSEE AND NORTHWEST GEORIGA...

AT 755PM EDT WEATHER RADAR INDICATED WIDELY SCATTERED SHOWERS AND
THUNDERSHOWERS OVER SOUTHEAST TENNESSEE AND UPPER NORTHWEST GEORGIA.

HOWEVER...RADAR INDICATED AN AREA OF HEAVY THUNDERSTORMS ACROSS THE
NORTHERN CUMBERLAND PLATEAU TO THE NORTH OF CROSSVILLE.  THIS AREA
OF THUNDERSTORMS EXTENDED SOUTHWESTWARD INTO THE MURFREESBORO AREA
OF MIDDLE TENNESSEE.

PERSON IN AND NEAR THE SEVERE THUNDERSTORM WATCH SHOULD CONTINUE
TO REMAIN ALERT FOR ADVERSE tWEATHER CONDITIONS.

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.