Alert archive / Ohio / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 84
The Storm Prediction Center issued this severe thunderstorm watch at Apr 7, 2020, 9:07 PM EDT for 24 counties in Indiana; 5 counties in Michigan; 39 counties in Ohio. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2020, 9:07 PM EDT (01:07 UTC)
- Expired
- Apr 8, 2020, 3:00 AM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 65 kt
All 68 counties
Adams County, IN, Allen County, IN, Blackford County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Huntington County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Noble County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Berrien County, MI, Branch County, MI, Cass County, MI, Hillsdale County, MI, Saint Joseph County, MI, Allen County, OH, Ashland County, OH, Ashtabula County, OH, Auglaize County, OH, Crawford County, OH, Cuyahoga County, OH, Defiance County, OH, Erie County, OH, Fulton County, OH, Geauga County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Lake County, OH, Lorain County, OH, Lucas County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Portage County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Van Wert County, OH, Wayne County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH
The radar
The Northern Indiana radar (KIWX), 113 km from the middle of the area, began a volume at 01:09 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
- 60%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 9:29 PM EDT | Severe Thunderstorm Warning | IWX | Berrien, Cass | 46 min |
| Apr 7, 9:36 PM EDT | Severe Thunderstorm Warning | IWX | LaPorte, Saint Joseph | 39 min |
| Apr 7, 9:57 PM EDT | Severe Thunderstorm Warning | IWX | Branch, Hillsdale | 48 min |
| Apr 7, 10:08 PM EDT | Severe Thunderstorm Warning | IWX | Elkhart | 29 min |
| Apr 7, 10:17 PM EDT | Severe Thunderstorm Warning | CLE | Erie, Lucas, Ottawa, Sandusky, Wood | 43 min |
| Apr 7, 10:21 PM EDT | Severe Thunderstorm Warning | IWX | Elkhart, LaGrange | 39 min |
| Apr 7, 10:41 PM EDT | Severe Thunderstorm Warning | IWX | LaPorte, Marshall, Saint Joseph, Starke | 49 min |
| Apr 7, 10:44 PM EDT | Severe Thunderstorm Warning | IWX | Hillsdale | 46 min |
| Apr 7, 10:45 PM EDT | Severe Thunderstorm Warning | IWX | DeKalb, LaGrange, Noble, Steuben | 45 min |
| Apr 7, 10:57 PM EDT | Severe Thunderstorm Warning | CLE | Cuyahoga, Geauga, Portage, Summit | 63 min |
| Apr 7, 11:01 PM EDT | Severe Thunderstorm Warning | CLE | Ashland, Cuyahoga, Erie, Huron, Lorain, Medina and 2 more | 44 min |
| Apr 7, 11:12 PM EDT | Severe Thunderstorm Warning | CLE | Ashtabula, Cuyahoga, Geauga, Lake, Portage, Summit and 1 more | 63 min |
| Apr 7, 11:13 PM EDT | Severe Thunderstorm Warning | CLE | Lucas, Ottawa, Sandusky, Wood | 43 min |
| Apr 7, 11:27 PM EDT | Severe Thunderstorm Warning | CLE | Mahoning, Trumbull | 33 min |
| Apr 7, 11:29 PM EDT | Tornado Warning | CLE | Lorain, Medina | 31 min |
| Apr 7, 11:38 PM EDT | Severe Thunderstorm Warning | CLE | Ashland, Cuyahoga, Geauga, Holmes, Huron, Lorain and 6 more | 67 min |
| Apr 7, 11:45 PM EDT | Tornado Warning | CLE | Medina, Stark, Summit, Wayne | 45 min |
| Apr 8, 12:11 AM EDT | Severe Thunderstorm Warning | CLE | Mahoning, Portage, Stark, Trumbull | 31 min |
| Apr 8, 1:24 AM EDT | Severe Thunderstorm Warning | ILN | Auglaize, Hardin, Logan, Shelby | 51 min |
| Apr 8, 1:47 AM EDT | Severe Thunderstorm Warning | ILN | Auglaize, Darke, Mercer, Miami, Shelby | 43 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
Detroit, MI (KDTX), launched 00:00Z, 1.1 hours before the alert went out and 151 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
- 847 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 982 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 260 m²/s²
- 0-3 km storm-relative helicity
- 345 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 6.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 8:22 PM EDT | Mesoscale Discussion | SPC | Lake, Porter | 83 min |
| Apr 7, 10:04 PM EDT | Mesoscale Discussion | SPC | Adams, Allen, DeKalb, Fulton, Huntington, Kosciusko and 6 more | 86 min |
| Apr 8, 12:20 AM EDT | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Cass, Clinton, Delaware and 14 more | 85 min |
| Apr 8, 5:24 PM EDT | Tornado Watch | SPC | Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick | 7 hr |
| Apr 8, 6:52 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Boone, Brown, Clark, Clay, Clinton and 52 more | 2 hr |
| Apr 8, 7:24 PM EDT | Tornado Watch | SPC | Bartholomew, Boone, Brown, Carroll, Clark, Clay and 51 more | 5 hr |
| Apr 7, 11:40 PM EDT | Severe Thunderstorm Watch | SPC | Athens, Belmont, Carroll, Champaign, Clark, Columbiana and 31 more | 6 hr |
| 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 |
Nearby
Severe Thunderstorm Watches in Ohio, 2020Severe Thunderstorm Watches in Indiana, 2020Severe Thunderstorm Watches in Michigan, 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.