Alert archive / Ohio / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 85
The Storm Prediction Center issued this severe thunderstorm watch at Apr 7, 2020, 11:40 PM EDT for 37 counties in Ohio; 15 counties in Pennsylvania; 28 counties in West Virginia. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2020, 11:40 PM EDT (03:40 UTC)
- Expired
- Apr 8, 2020, 6:00 AM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 80 counties
Athens County, OH, Belmont County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Columbiana County, OH, Coshocton County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Harrison County, OH, Hocking County, OH, Jackson County, OH, Jefferson County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Meigs County, OH, Miami County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Ross County, OH, Shelby County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Washington County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Fayette County, PA, Forest County, PA, Greene County, PA, Indiana County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Washington County, PA, Westmoreland County, PA, Barbour County, WV, Braxton County, WV, Brooke County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Hancock County, WV, Harrison County, WV, Jackson County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Webster County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Cleveland radar (KCLE), 131 km from the middle of the area, began a volume at 03:39 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
- 5%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
29 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 11:47 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Mercer, Venango | 43 min |
| Apr 8, 12:23 AM EDT | Severe Thunderstorm Warning | PBZ | Carroll, Columbiana, Jefferson, Tuscarawas | 52 min |
| Apr 8, 12:30 AM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 30 min |
| Apr 8, 12:37 AM EDT | Tornado Warning | PBZ | Columbiana | 11 min |
| Apr 8, 12:47 AM EDT | Severe Thunderstorm Warning | PBZ | Carroll, Harrison, Jefferson | 43 min |
| Apr 8, 1:07 AM EDT | Severe Thunderstorm Warning | PBZ | Carroll, Coshocton, Harrison, Jefferson, Tuscarawas | 19 min |
| Apr 8, 1:11 AM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Harrison, Jefferson | 49 min |
| Apr 8, 1:17 AM EDT | Tornado Warning | PBZ | Allegheny, Westmoreland | 6 min |
| Apr 8, 1:22 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Indiana, Washington, Westmoreland | 39 min |
| Apr 8, 1:24 AM EDT | Severe Thunderstorm Warning | ILN | Auglaize, Hardin, Logan, Shelby | 51 min |
| Apr 8, 1:39 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Indiana, Washington, Westmoreland | 51 min |
| Apr 8, 1:44 AM EDT | Severe Thunderstorm Warning | ILN | Champaign, Delaware, Logan, Union | 27 min |
| Apr 8, 1:47 AM EDT | Severe Thunderstorm Warning | ILN | Auglaize, Darke, Mercer, Miami, Shelby | 43 min |
| Apr 8, 2:32 AM EDT | Severe Thunderstorm Warning | PBZ | Preston | 43 min |
| Apr 8, 2:45 AM EDT | Severe Thunderstorm Warning | ILN | Champaign, Clark, Darke, Greene, Miami, Montgomery | 45 min |
| Apr 8, 2:57 AM EDT | Severe Thunderstorm Warning | PBZ | Marion, Monongalia, Preston | 25 min |
| Apr 8, 3:02 AM EDT | Severe Thunderstorm Warning | PBZ | Marion | 20 min |
| Apr 8, 3:03 AM EDT | Severe Thunderstorm Warning | RLX | Morgan | 27 min |
| Apr 8, 3:26 AM EDT | Severe Thunderstorm Warning | ILN | Clark, Fayette, Greene, Madison, Miami, Montgomery | 49 min |
| Apr 8, 3:26 AM EDT | Severe Thunderstorm Warning | RLX | Athens, Morgan, Washington | 34 min |
| Apr 8, 3:27 AM EDT | Severe Thunderstorm Warning | ILN | Fairfield, Hocking, Pickaway, Ross | 23 min |
| Apr 8, 3:34 AM EDT | Severe Thunderstorm Warning | RLX | Washington | 26 min |
| Apr 8, 3:40 AM EDT | Severe Thunderstorm Warning | RLX | Ritchie, Wood | 35 min |
| Apr 8, 3:50 AM EDT | Severe Thunderstorm Warning | RLX | Athens, Meigs, Vinton, Washington | 25 min |
| Apr 8, 4:08 AM EDT | Severe Thunderstorm Warning | ILN | Clark, Fayette, Greene, Madison | 52 min |
| Apr 8, 4:33 AM EDT | Severe Thunderstorm Warning | RLX | Braxton, Lewis, Randolph, Upshur, Webster | 27 min |
| Apr 8, 4:36 AM EDT | Severe Thunderstorm Warning | ILN | Fairfield, Hocking, Pickaway, Ross | 39 min |
| Apr 8, 5:49 AM EDT | Severe Thunderstorm Warning | RLX | Gallia, Jackson | 26 min |
| Apr 8, 6:00 AM EDT | Severe Thunderstorm Warning | RLX | Gallia, Jackson | 30 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
Cncnati-Daytn, OH (KILN), launched 00:00Z, 3.7 hours before the alert went out and 163 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
- 773 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 1493 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 215 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 9:07 PM EDT | Severe Thunderstorm Watch | SPC | Allen, Ashland, Ashtabula, Auglaize, Crawford, Cuyahoga and 33 more | 6 hr |
| Apr 7, 10:04 PM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Ashtabula, Auglaize, Carroll, Columbiana and 42 more | 86 min |
| Apr 8, 1:52 AM EDT | Mesoscale Discussion | SPC | Belmont, Guernsey, Harrison, Monroe, Noble, Washington | 83 min |
| Apr 8, 3:16 AM EDT | Mesoscale Discussion | SPC | Athens, Clark, Clinton, Fairfield, Fayette, Gallia and 15 more | 89 min |
| Apr 8, 5:30 AM EDT | Mesoscale Discussion | SPC | Fayette, Gallia, Highland, Jackson, Meigs, Pike and 2 more | 30 min |
| Apr 8, 12:39 PM EDT | Mesoscale Discussion | SPC | Adams, Brown, Clermont, Gallia, Lawrence, Scioto | 96 min |
| Apr 8, 1:10 PM EDT | Severe Thunderstorm Watch | SPC | Lawrence | 7 hr |
| Apr 8, 6:52 PM EDT | Mesoscale Discussion | SPC | Adams, Brown, Butler, Clark, Clermont, Clinton and 13 more | 2 hr |
| Apr 8, 7:24 PM EDT | Tornado Watch | SPC | Adams, Brown, Butler, Clermont, Clinton, Fayette and 9 more | 5 hr |
| Apr 7, 10:54 PM EDT | Mesoscale Discussion | SPC | Armstrong, Blair, Butler, Cambria, Cameron, Centre and 19 more | 2 hr |
| Apr 8, 2:14 AM EDT | Severe Thunderstorm Watch | SPC | Bedford, Franklin, Fulton | 2 hr |
| Apr 8, 3:53 AM EDT | Mesoscale Discussion | SPC | Hardy, Jefferson | 97 min |
| Apr 8, 4:05 PM EDT | Mesoscale Discussion | SPC | Boone, Logan, McDowell, Mercer, Mingo, Monroe and 3 more | 85 min |
Nearby
Severe Thunderstorm Watches in Ohio, 2020Severe Thunderstorm Watches in West Virginia, 2020Severe Thunderstorm Watches in Pennsylvania, 2020Every severe thunderstorm watch in 2020
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.