Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 147, NWS Morristown, TN

May 3, 1998Morgan County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 3, 1998, 5:25 PM EDT for Morgan County, Tennessee. It was in force for 45 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
May 3, 1998, 5:25 PM EDT (21:25 UTC)
Expired
May 3, 1998, 6:10 PM EDT
In force
45 min
Issued by
NWS Morristown, TN
Area
Whole counties

County Morgan County, TN

The radar

The Knoxville radar (KMRX), 112 km from the middle of the area, began a volume at 21:28 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.4 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 1998-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 50 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 12:00Z on 1998-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 square meters per square second.1939587897Sfc1 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
50 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
914 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
229 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 May 3, 2:55 PM EDT, 2 hours 30 minutes earlier.

Area forecast discussion, May 3, 2:55 PM EDT, 2 hours 30 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
255 PM EDT SUN MAY 3 1998

COLD FRONT ESTIMATED BTWN BNA & CSV ATTM. SHWRS/TSTMS FORMING IN AREA
UNSTABLE AIR AHEAD OF FRNT AS SEEN IN ADAP PRODUCTS. FRNT WL CONT MOVE
E INTO WRN PORTIONS OF CWA THIS EVE AND ACRS REMAINDER OF CWA OVRNGT.
BELIEVE MUCH OF SHWR/TSTM ACTIVITY WL DIE OUT ONCE THE SUN GOES DOWN.
LIKELY POPS STILL LOOK GOOD AND WOULD RETAIN MENTION OF MAINLY THIS
EVE.

MON...FRONT WL BE TO THE E. HWVR A VORT LOBE ROTATING ARND UPPER LOW
AND AN ASSOC SFC TROF WL MOVE THRU CWA DURING THE DAY. COOL POOL ALOFT
DIRECTLY OVHD ALONG W/DAYTIME HTG WL SET OFF SCT SHWRS/TSTMS. POPS WL
BE A BIT HIGHER IN NE TN/SW VA WHERE MOISTURE WL BE DEEPEST AND
PROXIMITY TO COOLEST TEMPS ALOFT BEST.

MON NGT & TUE...WX WL BE QUIETING DOWN AS VORT LOBE..SFC TROF..AND
DEEPEST MOISTURE LIFT OUT AND UPPER RIDGE BEGINS TO BUILD IN
W/ACCOMPANYING HGT RISES.  850 MB TROF LIFTS OUT W/TEMPS SLOWLY
WARMING..ESP DURING THE DAY TUES.  STILL ENUF MOISTURE ARND FOR A GOOD
DEAL OF CU SO WOULD GO WITH A PTLY CLDY BUT DRY FCST.

FWC/FAN TEMPS IN GOOD AGREEMENT AND RECMND A BLEND FOR THE UPCOMING
ZFP.

HSA

The office that day

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

IssuedProductOfficeCountiesLasted
May 3, 2:29 PM EDTSevere Thunderstorm WarningMRXClaiborne46 min
May 3, 3:40 PM EDTSevere Thunderstorm WarningMRXUnion50 min
May 3, 3:43 PM EDTSevere Thunderstorm WarningMRXKnox47 min
May 3, 4:05 PM EDTSevere Thunderstorm WarningMRXClaiborne, Grainger45 min
May 3, 4:33 PM EDTSevere Thunderstorm WarningMRXHancock47 min
May 3, 4:44 PM EDTSevere Thunderstorm WarningMRXAnderson, Union46 min
May 3, 4:53 PM EDTSevere Thunderstorm WarningMRXClaiborne, Grainger47 min
May 3, 4:58 PM EDTSevere Thunderstorm WarningMRXHawkins47 min
May 3, 5:13 PM EDTSevere Thunderstorm WarningMRXCumberland47 min
May 3, 5:14 PM EDTSevere Thunderstorm WarningMRXBlount46 min
May 3, 5:46 PM EDTSevere Thunderstorm WarningMRXAnderson49 min
May 3, 6:31 PM EDTSevere Thunderstorm WarningMRXAnderson29 min
May 3, 6:36 PM EDTSevere Thunderstorm WarningMRXKnox44 min
May 3, 6:51 PM EDTSevere Thunderstorm WarningMRXUnion49 min
May 3, 7:14 PM EDTSevere Thunderstorm WarningMRXGrainger, Knox41 min
May 3, 7:32 PM EDTSevere Thunderstorm WarningMRXHamblen, Jefferson43 min
May 3, 7:40 PM EDTSevere Thunderstorm WarningMRXBlount, Sevier60 min
May 3, 7:52 PM EDTSevere Thunderstorm WarningMRXKnox33 min
May 3, 3:08 PM EDTSevere Thunderstorm WarningMRXLee62 min
May 3, 4:35 PM EDTSevere Thunderstorm WarningMRXWise50 min
May 3, 5:01 PM EDTSevere Thunderstorm WarningMRXScott49 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; radar from the NEXRAD Level II archive.