Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 414, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jun 30, 1998, 3:30 PM EDT for Greene County, Tennessee. It was in force for 50 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 30, 1998, 3:30 PM EDT (19:30 UTC)
- Expired
- Jun 30, 1998, 4:20 PM EDT
- In force
- 50 min
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
County Greene County, TN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 30, 3:40 PM EDT | Hail 1 | Greeneville, 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 12:00Z, 7.5 hours before the alert went out and 265 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
- 29 J/kg
- Mixed-layer CIN
- -297 J/kg
- Mixed-layer LCL
- 1433 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 201 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 Jun 30, 3:00 PM EDT, 30 minutes earlier.
Area forecast discussion, Jun 30, 3:00 PM EDT, 30 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 3 PM EDT TUE JUN 30 1998 NARROW BAND OF TSTMS MOVG THRU PART OF CWA ASSOC W/SFC TROF. SFC FRNT ATTM XTNDS FM CNTRL PA INTO SRN IL. AM XPCTG ANTHR NARROW BAND OF TSTMS THIS EVE AS FRONT DROPS INTO CWA. STILL THINK SOME OF THESE WL BE STRONG TO SVR. CWA UNDER RRQ OF 90-100 KT JET W/GOOD UPPER DIVERG. SFC LIFTING PROVIDED BY FRNT..PLENTY OF MOISTURE TO FUEL CONVECTION. WOULD KEEP POPS IN THE 40-50 PCT RANGE. FRNT KEEPS MOVG S THRU CWA OVRNGT AND SHLD BE TO OUR S BY 12Z WED. SLGTLY COOLER & DRIER AIR XPCTD FOR WED THRU THURS AS SFC HIGH BUILDS SE FROM THE CNTRL & NRN PLAINS. STILL SOME GOOD VORT ENERGY SWINGING THRU UPPER TROF. HWVR..LTL MOISTURE TO WORK WITH AND SUBIDENCE PROVIDED BY SFC HIGH WL KEEP A LID ON ANY SHWR OR TSTM DVLPMT. FWC/FAN TEMPS IN GOOD AGREEMENT & LOOK OK. HSA
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 12:20 AM EDT | Severe Thunderstorm Warning | MRX | Claiborne | 65 min |
| Jun 30, 6:31 AM EDT | Severe Thunderstorm Warning | MRX | Meigs, Rhea | 49 min |
| Jun 30, 2:37 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne | 33 min |
| Jun 30, 3:26 PM EDT | Severe Thunderstorm Warning | MRX | Fentress | 34 min |
| Jun 30, 3:41 PM EDT | Severe Thunderstorm Warning | MRX | Morgan | 34 min |
| Jun 30, 3:58 PM EDT | Severe Thunderstorm Warning | MRX | Cocke | 32 min |
| Jun 30, 4:13 PM EDT | Severe Thunderstorm Warning | MRX | Anderson | 47 min |
| Jun 30, 4:40 PM EDT | Severe Thunderstorm Warning | MRX | Hamilton | 45 min |
| Jun 30, 4:52 PM EDT | Severe Thunderstorm Warning | MRX | Knox | 33 min |
| Jun 30, 4:57 PM EDT | Severe Thunderstorm Warning | MRX | Grainger | 33 min |
| Jun 30, 5:55 PM EDT | Severe Thunderstorm Warning | MRX | Cocke | 35 min |
| Jun 30, 6:02 PM EDT | Severe Thunderstorm Warning | MRX | Carter, Johnson, Sullivan | 33 min |
| Jun 30, 7:47 PM EDT | Severe Thunderstorm Warning | MRX | Cocke | 33 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.