Alert archive / Tennessee / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 286, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Aug 28, 1997, 6:21 PM EDT for Bradley County, Polk County, Tennessee. It was in force for 39 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 28, 1997, 6:21 PM EDT (22:21 UTC)
- Expired
- Aug 28, 1997, 7:00 PM EDT
- In force
- 39 min
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
Counties Bradley County, TN, Polk County, TN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 28, 6:30 PM EDT | Hail 0.75 | Benton, 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.4 hours before the alert went out and 197 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
- 1361 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 1022 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 28, 3:15 PM EDT, 3 hours 6 minutes earlier.
Area forecast discussion, Aug 28, 3:15 PM EDT, 3 hours 6 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 315 PM EDT THU AUG 28 1997 SFC FNT HARD TO FIND BUT BLV ITS STILL DRAPED EAST-WEST ACRS CENT KY. UNIDIRECTIONAL NW FLOW ON VWP...GIVING SOME UPSLOPE INTO APPALACHIANS. THIS LIKELY JUST ENUF TRIGGER TO INITIATE SOME ISOL SHWRS IN MTNS OF UPR EAST TN...WHICH HAVE JUST APPEARED. LO CLDS HAVE LIKELY SLOWED THIS INITIATION...AS DID NEG BUOYANCY SHOWN AT LO LVLS ON BNA SNDNG. TSTMS WILL DIE OFF W/I A COUPLE HRS OF SUNSET. MORE DENSE FOG LIKELY TONITE IN TRI AND CSV. TOMORO...ETA SHOWS UPR TROF AND ASSOC COLD FNT MOVING NE...SO ANOTHER SUMMER BACK DOOR FNT BITES THE DUST WILL THUS HAVE EVEN LESS TRIGGERING THAN TODAY. HWVR...HIER CAPES TOMORO SPELLS ISOL CONVECT AGAIN IN ELEVATED TERRAIN...SLIGHT CHC POPS. SMH
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 5:30 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton | 30 min |
| Aug 28, 5:35 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton | 25 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.