Alert archive / West Virginia / Severe Thunderstorm Watches in 1998
Severe Thunderstorm Watch 821
The Storm Prediction Center issued this severe thunderstorm watch at Sep 7, 1998, 6:00 PM EDT for 5 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 7, 1998, 6:00 PM EDT (22:00 UTC)
- Expired
- Sep 8, 1998, 12:00 AM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 60 counties
Floyd County, KY, Johnson County, KY, Martin County, KY, Pike County, KY, Allegany County, MD, Garrett County, MD, Washington County, OH, Alleghany County, VA, Bath County, VA, City of Covington, VA, Craig County, VA, Highland County, VA, Barbour County, WV, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Grant County, WV, Greenbrier County, WV, Hampshire County, WV, Hardy County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Marion County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mineral County, WV, Mingo County, WV, Monongalia County, WV, Monroe County, WV, Nicholas County, WV, Pendleton County, WV, Pleasants County, WV, Pocahontas County, WV, Preston County, WV, Putnam County, WV, Raleigh County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Summers County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 6:39 PM EDT | Severe Thunderstorm Warning | RLX | Barbour, Harrison, Taylor | 46 min |
| Sep 7, 6:58 PM EDT | Severe Thunderstorm Warning | PBZ | Tucker | 52 min |
| Sep 7, 7:02 PM EDT | Severe Thunderstorm Warning | RLX | Mason, Putnam | 33 min |
| Sep 7, 7:26 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 45 min |
| Sep 7, 7:28 PM EDT | Severe Thunderstorm Warning | RLX | Kanawha | 32 min |
| Sep 7, 8:09 PM EDT | Severe Thunderstorm Warning | RLX | Nicholas | 31 min |
| Sep 7, 8:32 PM EDT | Severe Thunderstorm Warning | RNK | Greenbrier | 48 min |
The nearest sounding before it
Roanoke, VA (KRNK), launched 12:00Z, 10.0 hours before the alert went out and 196 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
- 26 J/kg
- Mixed-layer CIN
- -164 J/kg
- Mixed-layer LCL
- 1696 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -80 m²/s²
- 0-3 km storm-relative helicity
- -37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
837 WWUS9 KMKC 072139 SEL1 MKC WW 072139 WVZ000-MDZ000-080400- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 821 STORM PREDICTION CENTER NORMAN OK 539 PM EDT MON SEP 7 1998 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF WEST VIRGINIA THE WESTERN PANHANDLE OF MARYLAND EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 600 PM UNTIL MIDNIGHT EDT. HAIL TO 1 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 85 STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTHWEST OF BECKLEY WEST VIRGINIA TO 5 MILES NORTHEAST OF MORGANTOWN WEST VIRGINIA. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION... CONTINUE...WW 820... DISCUSSION...THUNDERSTORMS WILL CONTINUE TO INCREASE AHEAD OF COLD FRONT AND APPROACHING UPSTREAM VORTICITY AXIS AS AIR MASS SHOWING MODERATE INSTABILITY. MID LEVEL FLOW WILL INCREASE TO NEAR 60 KT WITH ASSOCIATED WIND SHEAR SUPPORTING DAMAGING DOWNBURSTS. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR 28045. ...ROGASH 372,0831 394,0812 394,0781 372,0800
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 5:00 AM EDT | Severe Thunderstorm Watch | SPC | Ashland, Ashtabula, Columbiana, Crawford, Cuyahoga, Erie and 17 more | 5 hr |
| Sep 7, 8:15 AM EDT | Severe Thunderstorm Watch | SPC | Brooke, Hancock, Marshall, Ohio | 6 hr |
Nearby
Severe Thunderstorm Watches in West Virginia, 1998Severe Thunderstorm Watches in Virginia, 1998Severe Thunderstorm Watches in Kentucky, 1998Every severe thunderstorm watch 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.