Alert archive / West Virginia / Mesoscale Discussions in 2017
Mesoscale Discussion 1393
The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2017, 8:34 AM EDT for 4 states. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Jul 22, 2017, 8:34 AM EDT (12:34 UTC)
- Expired
- Jul 22, 2017, 10:00 AM EDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 38 counties
Garrett County, MD, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Harrison County, OH, Jefferson County, OH, Monroe County, OH, Noble County, OH, Washington County, OH, Allegheny County, PA, Beaver 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, Hancock County, WV, Harrison County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Mineral County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Ritchie County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Pittsburgh radar (KPBZ), 80 km from the middle of the area, began a volume at 12:35 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
Pittsburgh, PA (KAGC), launched 12:00Z, 0.6 hours before the alert went out and 67 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
- 277 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 609 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 1:12 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 12 more | 3 hr |
| Jul 22, 5:00 AM EDT | Mesoscale Discussion | SPC | Butler, Darke, Greene, Hamilton, Miami, Montgomery and 2 more | 90 min |
| Jul 22, 3:18 PM EDT | Mesoscale Discussion | SPC | Adams, Athens, Clinton, Fairfield, Fayette, Gallia and 17 more | 2 hr |
| Jul 22, 3:54 PM EDT | Severe Thunderstorm Watch | SPC | Athens, Fairfield, Fayette, Franklin, Gallia, Hocking and 11 more | 6 hr |
| Jul 22, 7:37 PM EDT | Mesoscale Discussion | SPC | Adams, Athens, Gallia, Highland, Jackson, Lawrence and 5 more | 83 min |
Nearby
Mesoscale Discussions in West Virginia, 2017Mesoscale Discussions in Ohio, 2017Mesoscale Discussions in Pennsylvania, 2017Every mesoscale discussion 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.