Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 421, NWS Morristown, TN

June 30, 1998Cocke County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 30, 1998, 5:55 PM EDT for Cocke County, Tennessee. It was in force for 35 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
Jun 30, 1998, 5:55 PM EDT (21:55 UTC)
Expired
Jun 30, 1998, 6:30 PM EDT
In force
35 min
Issued by
NWS Morristown, TN
Area
Whole counties

County Cocke County, TN

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 30, 3:45 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.9 hours before the alert went out and 290 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, Greensboro/Hi Pt, NC at 12:00Z on 1998-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 29 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, Greensboro/Hi Pt, NC at 12:00Z on 1998-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 square meters per square second.193958Sfc1 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
29 J/kg
Mixed-layer CIN
-297 J/kg
Mixed-layer LCL
1433 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
201 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.

900 
WUUS01 KMRX 302156 RRA
SVRMRX
TNC029-302230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
555 PM EDT TUE JUN 30 1998

THE NATIONAL WEATHER SERVICE IN KNOXVILLE/TRI-CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COCKE COUNTY IN EASTERN TENNESSEE

* UNTIL 630 PM EDT

* AT 555 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NORTH OF PARROTTSVILLE... MOVING SOUTHEAST AT
  35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...


DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS

GH/WS

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 Morristown, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 30, 3:00 PM EDT, 2 hours 55 minutes earlier.

Area forecast discussion, Jun 30, 3:00 PM EDT, 2 hours 55 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
3 PM EDT TUE JUN 30 1998

NARROW BAND OF TSTMS MOVG THRU PART OF CWA ASSOC W/SFC TROF. SFC FRNT
ATTM XTNDS FM CNTRL PA INTO SRN IL. AM XPCTG ANTHR NARROW BAND OF
TSTMS THIS EVE AS FRONT DROPS INTO CWA. STILL THINK SOME OF THESE WL
BE STRONG TO SVR. CWA UNDER RRQ OF 90-100 KT JET W/GOOD UPPER DIVERG.
SFC LIFTING PROVIDED BY FRNT..PLENTY OF MOISTURE TO FUEL CONVECTION.
WOULD KEEP POPS IN THE 40-50 PCT RANGE.

FRNT KEEPS MOVG S THRU CWA OVRNGT AND SHLD BE TO OUR S BY 12Z WED.
SLGTLY COOLER & DRIER AIR XPCTD FOR WED THRU THURS AS SFC HIGH BUILDS
SE FROM THE CNTRL & NRN PLAINS. STILL SOME GOOD VORT ENERGY SWINGING
THRU UPPER TROF. HWVR..LTL MOISTURE TO WORK WITH AND SUBIDENCE
PROVIDED BY SFC HIGH WL KEEP A LID ON ANY SHWR OR TSTM DVLPMT.

FWC/FAN TEMPS IN GOOD AGREEMENT & LOOK OK.

HSA

In the hours before

Local storm report, Jun 30, 3:41 PM EDT, 2 hours 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
341 PM EDT TUE JUN 30 1998

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

225 PM     IN CLEARFIELD             TN   WIND DAMAGE
06/30/98   CLAIBORNE                      SEVERAL TREES REPORTED
                                          DOWNED IN AND AROUND
                                          CLEARFIELD IN NORTHWEST
                                          PORTION OF THE COUNTY.
                                          REPORTED BY 911 DISPATCH.

255 PM     2 S ABINGDON              VA   WIND DAMAGE
06/30/98   WASHINGTON                     SEVERAL BUILDINGS DAMAGED
                                          FROM POSSIBLE DOWNBURST NEAR
                                          THE INTERSECTION OF
                                          GREEN SPRING ROAD AND
                                          BROWNING ROAD ABOUT 2 TO 3
                                          MILES SOUTH OF ABINGDON.
                                          SEVERAL AUTOMOBILE WRECKS
                                          WITH UNKNOWN INJURIES DUE TO
                                          DOWNED TREES AND DEBRIS.
                                          REPORTED BY SHERIFFS
                                          DISPATCH.

FERRELL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 12:20 AM EDTSevere Thunderstorm WarningMRXClaiborne65 min
Jun 30, 6:31 AM EDTSevere Thunderstorm WarningMRXMeigs, Rhea49 min
Jun 30, 2:37 PM EDTSevere Thunderstorm WarningMRXClaiborne33 min
Jun 30, 3:26 PM EDTSevere Thunderstorm WarningMRXFentress34 min
Jun 30, 3:30 PM EDTSevere Thunderstorm WarningMRXGreene50 min
Jun 30, 3:41 PM EDTSevere Thunderstorm WarningMRXMorgan34 min
Jun 30, 3:58 PM EDTSevere Thunderstorm WarningMRXCocke32 min
Jun 30, 4:13 PM EDTSevere Thunderstorm WarningMRXAnderson47 min
Jun 30, 4:40 PM EDTSevere Thunderstorm WarningMRXHamilton45 min
Jun 30, 4:52 PM EDTSevere Thunderstorm WarningMRXKnox33 min
Jun 30, 4:57 PM EDTSevere Thunderstorm WarningMRXGrainger33 min
Jun 30, 6:02 PM EDTSevere Thunderstorm WarningMRXCarter, Johnson, Sullivan33 min
Jun 30, 7:47 PM EDTSevere Thunderstorm WarningMRXCocke33 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 1998Every 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.