Alert archive / West Virginia / Severe Thunderstorm Watches in 2009
Severe Thunderstorm Watch 482
The Storm Prediction Center issued this severe thunderstorm watch at Jun 19, 2009, 6:28 PM EDT for 4 states. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 19, 2009, 6:28 PM EDT (22:28 UTC)
- Expired
- Jun 19, 2009, 9:50 PM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 51 counties
Allegany County, MD, Garrett County, MD, Athens County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Tuscarawas County, OH, Washington County, OH, Allegheny County, PA, Beaver County, PA, Bedford County, PA, Fayette County, PA, Greene County, PA, Somerset County, PA, Washington County, PA, Westmoreland County, PA, Barbour County, WV, Brooke County, WV, Doddridge County, WV, Gilmer County, WV, Grant County, WV, Hampshire County, WV, Hancock County, WV, Hardy County, WV, Harrison County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Mineral County, WV, Monongalia County, WV, Ohio County, WV, Pendleton County, WV, Pleasants County, WV, Preston County, WV, Randolph County, WV, Ritchie County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wetzel County, WV, Wood County, WV
The radar
The Pittsburgh radar (KPBZ), 65 km from the middle of the area, began a volume at 22:32 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 6:51 PM EDT | Severe Thunderstorm Warning | PBZ | Carroll | 43 min |
| Jun 19, 6:58 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Muskingum | 62 min |
| Jun 19, 7:03 PM EDT | Severe Thunderstorm Warning | PBZ | Guernsey, Harrison, Tuscarawas | 38 min |
| Jun 19, 8:08 PM EDT | Severe Thunderstorm Warning | PBZ | Guernsey, Muskingum, Noble | 19 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 10.5 hours before the alert went out and 64 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
- 883 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 5:56 PM EDT | Mesoscale Discussion | SPC | Garrett | 64 min |
| Jun 19, 3:38 AM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Darke, Defiance, Fulton, Hancock and 8 more | 97 min |
| Jun 19, 4:16 AM EDT | Severe Thunderstorm Watch | SPC | Allen, Auglaize, Champaign, Clark, Crawford, Darke and 32 more | 6 hr |
| Jun 19, 7:37 AM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Athens, Auglaize, Champaign, Clark and 46 more | 83 min |
| Jun 19, 2:37 PM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Champaign, Clark, Crawford, Darke and 24 more | 83 min |
| Jun 19, 6:11 PM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Butler, Champaign, Clark, Clermont and 35 more | 94 min |
| Jun 19, 6:59 PM EDT | Tornado Watch | SPC | Allen, Auglaize, Butler, Clermont, Darke, Defiance and 13 more | 8 hr |
| Jun 19, 7:04 PM EDT | Mesoscale Discussion | SPC | Lucas | 86 min |
| Jun 18, 8:21 PM EDT | Mesoscale Discussion | SPC | Gloucester, Isle of Wight, James City, King and Queen, Lancaster, Mathews and 11 more | 24 min |
Nearby
Severe Thunderstorm Watches in West Virginia, 2009Severe Thunderstorm Watches in Ohio, 2009Severe Thunderstorm Watches in Pennsylvania, 2009Every severe thunderstorm watch in 2009
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.