Alert archive / West Virginia / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 402
The Storm Prediction Center issued this severe thunderstorm watch at Jul 7, 2017, 1:27 PM EDT for 19 counties in Ohio; Fayette County, Greene County, Washington County, Pennsylvania; 30 counties in West Virginia. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 7, 2017, 1:27 PM EDT (17:27 UTC)
- Expired
- Jul 7, 2017, 8:59 PM EDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 65 kt
All 52 counties
Athens County, OH, Belmont County, OH, Carroll County, OH, Coshocton County, OH, Gallia County, OH, Guernsey County, OH, Harrison County, OH, Jackson County, OH, Jefferson County, OH, Lawrence County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Fayette County, PA, Greene County, PA, Washington County, PA, Barbour County, WV, Braxton County, WV, Brooke County, WV, Cabell County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Pittsburgh radar (KPBZ), 126 km from the middle of the area, began a volume at 17:27 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 2:06 PM EDT | Severe Thunderstorm Warning | PBZ | Muskingum | 39 min |
| Jul 7, 2:12 PM EDT | Severe Thunderstorm Warning | RLX | Morgan, Perry | 33 min |
| Jul 7, 2:17 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Muskingum | 28 min |
| Jul 7, 2:35 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Morgan, Perry, Vinton | 25 min |
| Jul 7, 2:42 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Guernsey, Muskingum, Noble, Tuscarawas | 48 min |
| Jul 7, 2:58 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Morgan, Vinton, Washington | 47 min |
| Jul 7, 3:36 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Meigs, Washington | 39 min |
| Jul 7, 3:36 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 24 min |
| Jul 7, 4:01 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 44 min |
| Jul 7, 5:47 PM EDT | Severe Thunderstorm Warning | RLX | Barbour, Pocahontas, Randolph, Upshur | 28 min |
| Jul 7, 6:17 PM EDT | Flash Flood Warning | RLX | Gallia, Jackson, Lawrence | 4 hr |
| Jul 7, 7:47 PM EDT | Severe Thunderstorm Warning | RLX | Gallia, Jackson, Lawrence, Meigs, Vinton | 58 min |
| Jul 7, 8:46 PM EDT | Severe Thunderstorm Warning | RLX | Gallia, Lawrence | 44 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 (KAGC), launched 12:00Z, 5.5 hours before the alert went out and 124 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
- 8 J/kg
- Mixed-layer CIN
- -139 J/kg
- Mixed-layer LCL
- 872 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 69 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 |
|---|---|---|---|---|
| Jul 7, 8:02 AM EDT | Mesoscale Discussion | SPC | Belmont, Carroll, Columbiana, Coshocton, Geauga, Guernsey and 11 more | 2 hr |
| Jul 7, 8:51 AM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Darke, Defiance, Mercer, Paulding and 3 more | 114 min |
| Jul 7, 9:46 AM EDT | Severe Thunderstorm Watch | SPC | Allen, Auglaize, Champaign, Clark, Crawford, Darke and 32 more | 7 hr |
| Jul 7, 11:22 AM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Butler, Champaign, Clark, Clinton and 30 more | 53 min |
| Jul 7, 1:07 PM EDT | Mesoscale Discussion | SPC | Athens, Belmont, Gallia, Guernsey, Jackson, Lawrence and 11 more | 53 min |
| Jul 7, 3:35 PM EDT | Mesoscale Discussion | SPC | Athens, Belmont, Gallia, Meigs, Monroe, Morgan and 3 more | 85 min |
| Jul 7, 3:54 PM EDT | Mesoscale Discussion | SPC | Adams, Brown, Butler, Clermont, Clinton, Greene and 7 more | 96 min |
| Jul 7, 4:24 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Butler, Clermont, Clinton, Fayette and 9 more | 7 hr |
| Jul 7, 6:34 PM EDT | Mesoscale Discussion | SPC | Adams, Gallia, Jackson, Lawrence, Scioto | 86 min |
Nearby
Severe Thunderstorm Watches in West Virginia, 2017Severe Thunderstorm Watches in Ohio, 2017Severe Thunderstorm Watches in Pennsylvania, 2017Every severe thunderstorm watch in 2017
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.