Alert archive / Virginia / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 29, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Feb 17, 1998, 11:00 AM EST for Lee County, Virginia. It was in force for 10 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 17, 1998, 11:00 AM EST (16:00 UTC)
- Expired
- Feb 17, 1998, 11:10 AM EST
- In force
- 10 min
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
County Lee County, VA
The radar
The Knoxville radar (KMRX), 65 km from the middle of the area, began a volume at 16:03 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.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 4.0 hours before the alert went out and 297 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 593 m above ground
- 0-6 km bulk shear
- 88 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 456 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 Feb 17, 10:00 AM EST, 1 hour earlier.
Area forecast discussion, Feb 17, 10:00 AM EST, 1 hour before
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</html>In the hours before
Special weather statement, Feb 17, 5:17 AM EST, 5 hours 43 minutes before
TNZ012>018-034>047-066>074-083>087-099>102-VAZ001-002-005-006-008- 171615- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 517 AM EST TUE FEB 17 1998 ...SEVERE STORMS MAY DEVELOP OVER EAST TENNESSEE AND SOUTHWEST VIRGINIA TODAY... A POWERFUL STORM SYSTEM AND ITS ASSOCIATED COLD FRONT WILL MOVE ACROSS THE REGION TODAY BRINGING POSSIBLE SEVERE THUNDERSTORMS TO EAST TENNESSEE AND SOUTHWEST VIRGINIA. THE FIRST WAVE OF STORMS WILL MOVE INTO SOUTHEAST TENNESSEE EARLY THIS MORNING AND ACROSS MUCH OF THE REMAINDER OF THE REGION BY MID DAY HOWEVER...ADDITIONAL STRONG STORMS MAY RE-DEVELOP DURING THE AFTERNOON AS EXTREMELY COLD AIR STREAMS ACROSS THE REGION IN THE UPPER LEVELS OF THE ATMOSPHERE. THIS WILL HELP TO DESTABILIZE THE AIRMASS AIDING THE DEVELOPMENT OF STRONG AND POSSIBLY SEVERE THUNDERSTORMS. THE MAIN THREAT FROM THESE STORMS WILL BE LARGE HAIL AND STRONG STRAIGHT-LINE WINDS. SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL SHOULD MONITOR WEATHER DEVELOPMENTS AND BE READY FOR POSSIBLE ACTIVATION TODAY. PLEASE STAY TUNED TO NOAA WEATHER RADIO OR FAVORITE RADIO AND TELEVISION STATIONS FOR LATER STATEMENTS FROM THE NATIONAL WEATHER SERVICE. TH
Special weather statement, Feb 17, 5:18 AM EST, 5 hours 42 minutes before
TNZ012>018-034>047-066>074-083>087-099>102-VAZ001-002-005-006-008- 171615- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 518 AM EST TUE FEB 17 1998 ...SEVERE STORMS MAY DEVELOP OVER EAST TENNESSEE AND SOUTHWEST VIRGINIA TODAY... A POWERFUL STORM SYSTEM AND ITS ASSOCIATED COLD FRONT WILL MOVE ACROSS THE REGION TODAY BRINGING POSSIBLE SEVERE THUNDERSTORMS TO EAST TENNESSEE AND SOUTHWEST VIRGINIA. THE FIRST WAVE OF STORMS WILL MOVE INTO SOUTHEAST TENNESSEE EARLY THIS MORNING AND ACROSS MUCH OF THE REMAINDER OF THE REGION BY MID DAY HOWEVER...ADDITIONAL STRONG STORMS MAY RE-DEVELOP DURING THE AFTERNOON AS EXTREMELY COLD AIR STREAMS ACROSS THE REGION IN THE UPPER LEVELS OF THE ATMOSPHERE. THIS WILL HELP TO DESTABILIZE THE AIRMASS AIDING THE DEVELOPMENT OF STRONG AND POSSIBLY SEVERE THUNDERSTORMS. THE MAIN THREAT FROM THESE STORMS WILL BE LARGE HAIL AND STRONG STRAIGHT-LINE WINDS. SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL SHOULD MONITOR WEATHER DEVELOPMENTS AND BE READY FOR POSSIBLE ACTIVATION TODAY. PLEASE STAY TUNED TO NOAA WEATHER RADIO OR FAVORITE RADIO AND TELEVISION STATIONS FOR LATER STATEMENTS FROM THE NATIONAL WEATHER SERVICE. TH
Special weather statement, Feb 17, 5:18 AM EST, 5 hours 42 minutes before
TNZ012>018-034>047-066>074-083>087-099>102-VAZ001-002-005-006-008- 171615- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 518 AM EST TUE FEB 17 1998 ...SEVERE STORMS MAY DEVELOP OVER EAST TENNESSEE AND SOUTHWEST VIRGINIA TODAY... A POWERFUL STORM SYSTEM AND ITS ASSOCIATED COLD FRONT WILL MOVE ACROSS THE REGION TODAY BRINGING POSSIBLE SEVERE THUNDERSTORMS TO EAST TENNESSEE AND SOUTHWEST VIRGINIA. THE FIRST WAVE OF STORMS WILL MOVE INTO SOUTHEAST TENNESSEE EARLY THIS MORNING AND ACROSS MUCH OF THE REMAINDER OF THE REGION BY MID DAY HOWEVER...ADDITIONAL STRONG STORMS MAY RE-DEVELOP DURING THE AFTERNOON AS EXTREMELY COLD AIR STREAMS ACROSS THE REGION IN THE UPPER LEVELS OF THE ATMOSPHERE. THIS WILL HELP TO DESTABILIZE THE AIRMASS AIDING THE DEVELOPMENT OF STRONG AND POSSIBLY SEVERE THUNDERSTORMS. THE MAIN THREAT FROM THESE STORMS WILL BE LARGE HAIL AND STRONG STRAIGHT-LINE WINDS. SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL SHOULD MONITOR WEATHER DEVELOPMENTS AND BE READY FOR POSSIBLE ACTIVATION TODAY. PLEASE STAY TUNED TO NOAA WEATHER RADIO OR FAVORITE RADIO AND TELEVISION STATIONS FOR LATER STATEMENTS FROM THE NATIONAL WEATHER SERVICE. TH
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 17, 8:04 AM EST | Severe Thunderstorm Warning | MRX | McMinn, Meigs, Rhea | 41 min |
| Feb 17, 8:39 AM EST | Severe Thunderstorm Warning | MRX | Loudon, Monroe, Roane | 51 min |
| Feb 17, 8:51 AM EST | Severe Thunderstorm Warning | MRX | Anderson, Knox, Morgan | 54 min |
| Feb 17, 8:51 AM EST | Severe Thunderstorm Warning | MRX | Blount | 54 min |
| Feb 17, 9:10 AM EST | Severe Thunderstorm Warning | MRX | Campbell, Scott | 50 min |
| Feb 17, 9:19 AM EST | Severe Thunderstorm Warning | MRX | Sevier | 41 min |
| Feb 17, 9:30 AM EST | Severe Thunderstorm Warning | MRX | Grainger, Jefferson, Union | 45 min |
| Feb 17, 9:40 AM EST | Severe Thunderstorm Warning | MRX | Hamblen | 40 min |
| Feb 17, 9:49 AM EST | Severe Thunderstorm Warning | MRX | Cocke | 56 min |
| Feb 17, 9:49 AM EST | Severe Thunderstorm Warning | MRX | Claiborne | 56 min |
| Feb 17, 9:51 AM EST | Tornado Warning | MRX | Grainger, Hamblen | 39 min |
| Feb 17, 10:08 AM EST | Severe Thunderstorm Warning | MRX | Hancock, Hawkins | 52 min |
| Feb 17, 10:13 AM EST | Severe Thunderstorm Warning | MRX | Greene | 47 min |
| Feb 17, 10:51 AM EST | Severe Thunderstorm Warning | MRX | Sullivan, Washington | 54 min |
| Feb 17, 10:55 AM EST | Severe Thunderstorm Warning | MRX | Greene | 15 min |
| Feb 17, 11:00 AM EST | Severe Thunderstorm Warning | MRX | Hawkins | 10 min |
| Feb 17, 10:08 AM EST | Severe Thunderstorm Warning | MRX | Lee | 52 min |
| Feb 17, 10:34 AM EST | Severe Thunderstorm Warning | MRX | Scott | 41 min |
| Feb 17, 11:06 AM EST | Severe Thunderstorm Warning | MRX | Wise | 54 min |
| Feb 17, 11:10 AM EST | Severe Thunderstorm Warning | MRX | Scott | 25 min |
| Feb 17, 11:35 AM EST | Severe Thunderstorm Warning | MRX | Russell, Washington | 40 min |
| Feb 17, 8:29 AM EST | Severe Thunderstorm Warning | MRX | Cherokee, Clay | 46 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.