Alert archive / Tennessee / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 3, NWS Nashville, TN

April 30, 1990Robertson County, Sumner County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Apr 30, 1990, 5:55 AM CDT for Robertson County, Sumner County, Tennessee. It was in force for 65 min.

The area

The counties it named.

The facts

Issued: Apr 30, 1990, 5:55 AM CDT (10:55 UTC)
Expired: Apr 30, 1990, 7:00 AM CDT
In force: 65 min
Issued by: NWS Nashville, TN
Area: Whole counties

Counties Robertson County, TN, Sumner 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, 10.9 hours before the alert went out and 41 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: 2078 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 342 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 301104
SVRBNA
TNC147-165-301200-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
555 AM CDT MON APR 30 1990
 
THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  700 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN MIDDLE TENNESSEE
 
   ...ROBERTSON COUNTY...SUMNER COUNTY
 
AT 0600 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN NASHVILLE
TENNESSEE INDICATED A SEVERE THUNDERSTORM IN THE PORTLAND AREA
OF NORTH MIDDLE TENNESSEE.  THE PORTLAND POLICE DEPARTMENT AND
THE PUBLIC HAVE REPORTED DIME TO QUARTER SIZED HAIL DURING THE
PAST HALF HOUR.
 
THIS STORM IS MOVING TO THE EAST AT 35 MILES AN HOUR AND
WILL MOVE THROUGH PORTION OF ROBERTSON AND SUMNER COUNTIES
DURING THE NEXT HOUR.
 
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE T5O 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, 5:39 AM CDT, 16 minutes before

TNZ-009-300540]

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE  NASHVILLE TN
540 AM CDT MON APR 30 1990

    ...HEAVY THUNDERSTORMS MOVING INTO NORTH MIDDLE TENNESSEE...

AT 530 AM CDT THE NATIONAL WEATHER SERVIVE RADAR IN NASHVILLE TENNESSEE
INDICATED A HEAVY THUNDERSTORM THAT WAS OCCURING IN SOUTH CENTRAL
KENTUCKY EAST OF THE FORT CAMPBELL AREA.  THIS HEAVY THUNDERSTORM WAS
MOVING TO THE EAST AT 35 MILES AN HOUR AND WILL AFFECT THE NORTH
PO!RTIONS OF ROBERTSON AND SUMNER COUNTIES DURING THE NEXT HOUR.

Nearby

Severe Thunderstorm Warnings in Tennessee, 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.