Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 261, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at May 31, 1998, 11:30 PM EDT for Anderson County, Claiborne County, Union County, Tennessee. It was in force for 60 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 31, 1998, 11:30 PM EDT (03:30 UTC)
- Expired
- Jun 1, 1998, 12:30 AM EDT
- In force
- 60 min
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
Counties Anderson County, TN, Claiborne County, TN, Union County, TN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 31, 11:55 PM EDT | Thunderstorm Wind | Clairfield, TN |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 31, 9:45 PM EDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 3.5 hours before the alert went out and 243 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.
- Mixed-layer CAPE
- 3629 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 1064 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 302 m²/s²
- Significant tornado parameter
- 5.1
- Supercell composite
- 21.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMRX 010330 RRA SVRMRX TNC001-025-049-129-173-010430- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 1130 PM EDT (1030 PM CDT) SUN MAY 31 1998 THE NATIONAL WEATHER SERVICE IN KNOXVILLE/TRI-CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ANDERSON COUNTY IN EASTERN TENNESSEE CLAIBORNE COUNTY IN EASTERN TENNESSEE FENTRESS COUNTY IN EASTERN TENNESSEE MORGAN COUNTY IN EASTERN TENNESSEE UNION COUNTY IN EASTERN TENNESSEE * UNTIL 1230 AM EDT (1130 PM CDT) * AT 1127 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM PALL MALL IN FENTRESS COUNTY TO NEAR CLAIRFIELD IN CLAIBORNE... MOVING SOUTHEAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... WARTBURG AROUND 1145 PM EDT OAK RIDGE AND MAYNARDVILLE AROUND 1150 PM EDT GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING.
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 31, 8:25 PM EDT, 3 hours 5 minutes earlier.
Area forecast discussion, May 31, 8:25 PM EDT, 3 hours 5 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 825 PM EDT SUN MAY 31 1998 MODIFIED BNA SOUNDING RATHER LETHAL THIS EVE WITH CAPE ARND 2800 AND HELICITY ARND 300. WITH THIS PROFILE...SUPERCELL STORMS MAY DEVELOP ALTHOUGH MAIN THREAT APPEARS TO BE DOWNBURST WIND AND HAIL. INITIAL LINE OF STORMS MOVG ALONG OUTFLOW WL REACH SW VA ZONES ARND 02Z AND LATER WHILE DEVELOPMENT WL OCCUR AFT MIDNITE MUCH OF THE REMAINDER OF THE FA WITH TE EXCEPTION OF EXTREME NE TN ZONES. STORMS WL REACH THIS AREA ARND 03-04Z. DONT EXPECT CD FNT ON PLATEAU UNTIL 08Z.
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 10:25 PM EDT | Tornado Warning | MRX | Campbell | 50 min |
| May 31, 10:28 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne | 62 min |
| May 31, 10:43 PM EDT | Tornado Warning | MRX | Claiborne | 47 min |
| May 31, 10:52 PM EDT | Severe Thunderstorm Warning | MRX | Scott | 63 min |
| May 31, 11:10 PM EDT | Severe Thunderstorm Warning | MRX | Campbell | 65 min |
| May 31, 11:30 PM EDT | Severe Thunderstorm Warning | MRX | Fentress, Morgan | 60 min |
| May 31, 11:54 PM EDT | Severe Thunderstorm Warning | MRX | Scott | 66 min |
| Jun 1, 12:12 AM EDT | Flash Flood Warning | MRX | Campbell, Scott | 3 hr |
| Jun 1, 12:19 AM EDT | Severe Thunderstorm Warning | MRX | Grainger | 61 min |
| Jun 1, 12:28 AM EDT | Severe Thunderstorm Warning | MRX | Anderson | 62 min |
| Jun 1, 12:33 AM EDT | Severe Thunderstorm Warning | MRX | Claiborne | 47 min |
| Jun 1, 12:35 AM EDT | Severe Thunderstorm Warning | MRX | Campbell | 50 min |
| Jun 1, 12:45 AM EDT | Severe Thunderstorm Warning | MRX | Hamblen, Jefferson | 65 min |
| Jun 1, 12:45 AM EDT | Severe Thunderstorm Warning | MRX | Knox | 65 min |
| Jun 1, 1:00 AM EDT | Severe Thunderstorm Warning | MRX | Cocke, Sevier | 65 min |
| Jun 1, 1:00 AM EDT | Severe Thunderstorm Warning | MRX | Blount | 65 min |
| Jun 1, 1:30 AM EDT | Flash Flood Warning | MRX | Anderson, Knox | 3 hr |
| Jun 1, 2:02 AM EDT | Flash Flood Warning | MRX | Blount | 3 hr |
| Jun 1, 2:18 AM EDT | Severe Thunderstorm Warning | MRX | Meigs, Rhea | 32 min |
| Jun 1, 2:20 AM EDT | Severe Thunderstorm Warning | MRX | Meigs, Rhea | 30 min |
| Jun 1, 2:58 AM EDT | Severe Thunderstorm Warning | MRX | McMinn | 47 min |
| Jun 1, 4:24 AM EDT | Flash Flood Warning | MRX | Blount, Knox | 3 hr |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.