Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 314, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jun 5, 1998, 8:13 PM EDT for Washington County, Tennessee. It was in force for 47 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
- Jun 5, 1998, 8:13 PM EDT (00:13 UTC)
- Expired
- Jun 5, 1998, 9:00 PM EDT
- In force
- 47 min
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
County Washington County, TN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 5, 8:45 PM EDT | Hail 0.75 | Jonesboro, 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 nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.2 hours before the alert went out and 234 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
- 284 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 950 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.8
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 5, 3:05 PM EDT, 5 hours 8 minutes earlier.
Area forecast discussion, Jun 5, 3:05 PM EDT, 5 hours 8 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 305 PM EDT FRI JUN 5 1998 SATELLITE DEPICTING THUNDERSTORM COMPLEX IN CENTRAL ALABAMA...AHEAD OF A SURFACE FRONT EXTENDING FROM EASTERN AR...TO WESTERN TN...OVER CENTRAL KY...AND INTO CENTRAL NC. COMPLEX TAKING A NORTHEASTERLY MOVEMENT WHICH WILL PUT IT IN OUR CWA THIS EVENING. STILL EXPECTING THUNDERSTORMS TO DEVELOP LATE THIS AFTERNOON. SUNSHINE WILL CONTINUE TO DESTABILIZE THE AREA AND MODIFIED 12Z BNA SOUNDING HAD CAPES AROUND 1500 AND LI OF -4. PROBABLY SHOULD KEEP A LIKELY POP OVER ENTIRE CWA FOR THIS EVENING AND TONIGHT. WITH THE LOW FFG VALUES OVER MOST OF OUR COUNTIES AND THE HIGH PRECIPITABLE WATER AT BNA...RECOMMEND EXTENDING THE FFA THROUGH TONIGHT. MODELS FAIRLY SIMILAR. COLD FRONT EXPECTED TO BE THROUGH THE CWA BY SATURDAY MORNING...BUT STILL SOME PVA ASSOCIATE WITH THE TROF WHICH MAY TRIGGER A FEW SHOWERS ON SATURDAY. WEAK VERTICAL VELOCITIES WITH IT...PROBABLY JUST NEED A CHANCE POP. 500MB TROF OVER APPALACHIANS BY SUNDAY MORNING. CWA SHOULD BE COOL AND DRY ON SUNDAY. FAN AND FWC TEMPERATURES VERY CLOSE...PREFER THE COOLER FAN. GH
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 8:44 PM EDT | Severe Thunderstorm Warning | MRX | Campbell | 31 min |
| Jun 5, 9:14 PM EDT | Severe Thunderstorm Warning | MRX | Greene, Hamblen, Hawkins | 46 min |
| Jun 5, 9:24 PM EDT | Flash Flood Warning | MRX | Greene, Hamblen, Hawkins | 2 hr |
| Jun 5, 8:32 PM EDT | Severe Thunderstorm Warning | MRX | Russell | 18 min |
| Jun 5, 8:25 PM EDT | Flash Flood Warning | MRX | Clay | 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.