Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 18, NWS Nashville, TN

March 20, 1998Bledsoe County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Mar 20, 1998, 12:00 AM CST for Bledsoe County, Tennessee. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 20, 1998, 12:00 AM CST (06:00 UTC)
Expired: Mar 20, 1998, 1:00 AM CST
In force: 60 min
Issued by: NWS Nashville, TN
Area: Whole counties

County Bledsoe County, TN

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 19, 11:45 PM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 6.0 hours before the alert went out and 139 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: 68 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 1008 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 358 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KBNA 200602 RRA
SVRBNA
TNC007-200700-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
MIDNIGHT CST FRI MAR 20 1998
 
THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  100 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST TENNESSEE
 
   ...BLEDSOE COUNTY
 
AT MIDNIGHT...DOPPLER WEATHER RADAR INDICATED A SEVERE THUNDERSTORM
MOVING INTO SOUTHWEST BLEDSOE COUNTY NEAR PAILO...HENDON AND
BAKEWELL.  THE SEVERE THUNDERSTORM IS MOVING NORTHEAST AT 40 MPH.
 
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.
 
BOYD

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.

NWS Nashville, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 19, 7:10 PM CST, 4 hours 50 minutes earlier.

Area forecast discussion, Mar 19, 7:10 PM CST, 4 hours 50 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
710 PM CST THU MAR 19 1998

ZNS LOOK FINE.

MARGINALLY UNSTBL AMS OVR RGN. TSTMS CONT TO DECRG IN INTENSITY WITH
TIME. 00Z U.A. SHOW MSTR IS CONFINED JUST TO THE VERY LOW LVLS. CAP
STRENGTH IS +3 DEGS. I FIGURE WATCH BOX WL BE ALLOWED TO EXPIRE AT
9 PM.

TIMING OF CDFNT ON MAN MIX PROGS THRU BNA AT 06Z LOOKS GUD.
A RAW DAY SHAPING UP FOR FRI...BLUSTERY, COLD AND SHOWERY.

IF ETA IS RIGHT...THERE CUD BE SOME FLRYS ARND SAT MRNG.

END/ORCHANIAN

In the hours before

Local storm report, Mar 19, 6:40 PM CST, 5 hours 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
640 PM CST THU MAR 19 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0531 PM    DECATURVILLE              TN   WIND DAMAGE
03/19/98   DECATUR                        6 HOMES SUSTAINED ROOF
                                          DAMAGE. LOTS OF TREES
                                          BLOWN DOWN.

END/ORCHANIAN

Local storm report, Mar 19, 6:40 PM CST, 5 hours 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
640 PM CST THU MAR 19 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0531 PM    DECATURVILLE              TN   WIND DAMAGE
03/19/98   DECATUR                        6 HOMES SUSTAINED ROOF
                                          DAMAGE. LOTS OF TREES
                                          BLOWN DOWN.

END/ORCHANIAN

Special weather statement, Mar 19, 6:52 PM CST, 5 hours 8 minutes before

TNZ022-055-200125-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
652 PM CST THU MAR 19 1998

THE SEVERE THUNDERSTORM WATCH FOR BENTON AND DECATUR COUNTIES
HAS BEEN CANCELLED. THE IMMEDIATE THREAT FOR SEVERE WEATHER IN
THESE AREAS HAS ENDED.

TROUTMAN

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 19, 9:52 PM CST	Severe Thunderstorm Warning	OHX	Franklin	53 min
Mar 19, 10:35 PM CST	Tornado Warning	OHX	Grundy	40 min
Mar 19, 10:49 PM CST	Tornado Warning	OHX	Warren	26 min
Mar 19, 11:05 PM CST	Tornado Warning	OHX	Van Buren	55 min
Mar 19, 11:10 PM CST	Severe Thunderstorm Warning	OHX	Franklin	50 min
Mar 19, 11:25 PM CST	Severe Thunderstorm Warning	OHX	Marion	50 min
Mar 19, 11:45 PM CST	Severe Thunderstorm Warning	OHX	Sequatchie	45 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 1998 Every severe thunderstorm warning in 1998

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.