Alert archive / Tennessee / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 9, NWS Nashville, TN

August 9, 1990Macon County, Smith County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Aug 9, 1990, 7:55 PM CDT for Macon County, Smith County, Tennessee. It was in force for 65 min.

The area

The counties it named.

The facts

Issued
Aug 9, 1990, 7:55 PM CDT (00:55 UTC)
Expired
Aug 9, 1990, 9:00 PM CDT
In force
65 min
Issued by
NWS Nashville, TN
Area
Whole counties

Counties Macon County, TN, Smith 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, 0.9 hours before the alert went out and 63 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 1990-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1281 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 1990-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 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
1281 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1398 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
-9 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 KBNA 100059
SVRBNA
TNC111-159-100200-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
755 PM CDT THU AUG 9 1990
 
THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  900 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN MIDDLE TENNESSEE
 
   ...MACON COUNTY...SMITH COUNTY
 
A BAND OF SEVERE THUNDERSTORMS WAS LOCATED FROM GLASGOW KENTUCKY
SOUTH TO CARTHAGE TENNESSEE. THE SHERIFF'S DEPARTMENT IN SMITH
COUNTY REPORTED GOLF BALL SIZE HAIL AND FREQUENT LIGHTNING FROM
THESE STORMS.  THESE STORMS WERE MOVING SOUTH SO RESIDENTS CAN
EXPECT NUMEROUS THUNDERSTORMS TO MOVE OVER THE SAME AREA.  THIS
COULD POSSIBLY CAUSE FLASH FLOODING IN LOW-LYING AREAS.
 
RESIDENTS IN AREAS AFFECTED BY THESE STORMS SHOULD CONTINUE TO
MONITOR NOAA WEATHER RADIO AND LOCAL TELEVISION AND RADIO
BROADCAST TO KEEP ABREAST OF THE CURRENT SITUATION.
 
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, 6:39 PM CDT, 1 hour 16 minutes before
TNZ006-008-100045-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NASHVILLE TN
636 PM CDT THU AUG 9 1990

AT 630 PM CDT...SEVERAL THUNDERSTORMS WITH HEAVY RAIN WERE OCCURRING
OVER THE CUMBERLAND PLATEAU...THE ADJACENT AREAS OF EAST TENNESSEE
AND EXTREME EASTERN MIDDLE TENNESSEE.  THE THUNDERSTORMS WERE
OCCURRING NEAR CARTHAGE IN MIDDLE TENNESSEE...OAK RIDGE AND DAYTON
IN EAST TENNESSEE AND PIKEVILLE ON THE CUMBERLAND PLATEAU.

THESE THUNDERSTORMS WILL BE ACCOMPANIED BY DANGEROUS LIGHTNING...
HIGH WINDS AND HEAVY RAIN.  MOTORISTS SHOULD BE ON THE LOOKOUT
FOR STANDING WATER ON THE ROADS IN AREAS OF HEAVY RAIN.

OTHER THUNDERSTORMS WERE OCCURRING ACROSS MUCH OF THE CUMBERLAND
PLATEAU...THE NORTHEAST CORNER OF MIDDLE TENNESSEE AND IN SOUTH
CENTRAL KENTUCKY SOUTH OF GLASGOW AND NEAR MAMMOTH CAVE.

THE THUNDERSTORMS WERE MOVING SLOWLY TO THE SOUTH.
Special weather statement, Aug 9, 7:42 PM CDT, 13 minutes before
TNZ006-008-100145-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NASHVILLE TN
738 PM CDT THU AUG 9 1990

AT 730 PM CDT...SEVERE THUNDERSTORMS AND HEAVY RAIN WERE OCCURRING
IN A BAND FROM CENTER HILL LAKE NORTH TO NEAR GLASGOW KENTUCKY.
THESE STORMS WERE PRODUCING VERY HEAVY RAIN AND DANGEROUS LIGHTNING.

THUNDERSTORMS...SOME WITH HEAVY RAIN...WERE ALSO OCCURRING IN EAST
TENNESSEE FROM CHATTANOOGA TO ATHENS AND NEAR LAKE CUMBERLAND AND
CAMPBELLSVILLE IN SOUTH CENTRAL KENTUCKY.

THESE THUNDERSTORMS WERE MOVING VERY SLOWLY SOUTH.

RESIDENTS IN THESE AREAS SHOULD KEEP A WEATHER EYE ON THE SKY AND
BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD THREATENING WEATHER
OCCUR.

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.