Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 415, NWS Morristown, TN

June 30, 1998Morgan County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 30, 1998, 3:41 PM EDT for Morgan County, Tennessee. It was in force for 34 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, 3:41 PM EDT (19:41 UTC)
Expired: Jun 30, 1998, 4:15 PM EDT
In force: 34 min
Issued by: NWS Morristown, TN
Area: Whole counties

County Morgan County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.7 hours before the alert went out and 175 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: 14 J/kg
Mixed-layer CIN: -443 J/kg
Mixed-layer LCL: 1330 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, 41 minutes earlier.

Area forecast discussion, Jun 30, 3:00 PM EDT, 41 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, 0 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.

Issued	Product	Office	Counties	Lasted
Jun 30, 12:20 AM EDT	Severe Thunderstorm Warning	MRX	Claiborne	65 min
Jun 30, 6:31 AM EDT	Severe Thunderstorm Warning	MRX	Meigs, Rhea	49 min
Jun 30, 2:37 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne	33 min
Jun 30, 3:26 PM EDT	Severe Thunderstorm Warning	MRX	Fentress	34 min
Jun 30, 3:30 PM EDT	Severe Thunderstorm Warning	MRX	Greene	50 min
Jun 30, 3:58 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	32 min
Jun 30, 4:13 PM EDT	Severe Thunderstorm Warning	MRX	Anderson	47 min
Jun 30, 4:40 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton	45 min
Jun 30, 4:52 PM EDT	Severe Thunderstorm Warning	MRX	Knox	33 min
Jun 30, 4:57 PM EDT	Severe Thunderstorm Warning	MRX	Grainger	33 min
Jun 30, 5:55 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	35 min
Jun 30, 6:02 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Johnson, Sullivan	33 min
Jun 30, 7:47 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	33 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.