Alert archive / Tennessee / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 282, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Aug 19, 1997, 9:34 PM EDT for Morgan County, Roane County, Tennessee. It was in force for 56 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
- Aug 19, 1997, 9:34 PM EDT (01:34 UTC)
- Expired
- Aug 19, 1997, 10:30 PM EDT
- In force
- 56 min
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
Counties Morgan County, TN, Roane County, TN
The radar
The Knoxville radar (KMRX), 108 km from the middle of the area, began a volume at 01:33 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 19, 10:00 PM EDT | Thunderstorm Wind | Kingston, TN | Tree down. |
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 |
|---|---|---|---|
| Aug 19, 8:15 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.6 hours before the alert went out and 292 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
- 1249 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1276 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
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 Aug 19, 7:53 PM EDT, 1 hour 41 minutes earlier.
Area forecast discussion, Aug 19, 7:53 PM EDT, 1 hour 41 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 750 PM EDT TUE AUG 19 1997 SVR TSRA MOVG STEADILY E ACRS MID TN AND SOME TSRA ALREADY ON THE PLATEAU SO WE MIGHT CHANGE MAINLY AFT MIDNITE WORDING HERE. UNSTABLE AIRMASS AND DECENT DYNAMICS WL COMBINE FOR AN ACTIVE NITE ACRS E TN (MOST OF FA AFT MIDNITE). REMAINDER OF FCST FINE BUT MINS MAY NEED TO BE RAISED A CAT AS CLOUDS INCREASE AND PRES GRAD TIGHTENS AHD OF SFC LOW PROXGGED TO SHIFT ENE THRU KY.
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 8:16 PM EDT | Severe Thunderstorm Warning | MRX | Cumberland | 59 min |
| Aug 19, 9:15 PM EDT | Severe Thunderstorm Warning | MRX | Cumberland | 60 min |
| Aug 20, 12:10 AM EDT | Severe Thunderstorm Warning | MRX | Blount, Sevier | 65 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 1997Every severe thunderstorm warning in 1997
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; radar from the NEXRAD Level II archive.