Alert archive / Ohio / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 627
The Storm Prediction Center issued this severe thunderstorm watch at Jul 11, 2011, 10:16 AM EDT for 70 counties in Ohio. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 11, 2011, 10:16 AM EDT (14:16 UTC)
- Expired
- Jul 11, 2011, 7:00 PM EDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
All 70 counties
Adams County, OH, Allen County, OH, Ashland County, OH, Ashtabula County, OH, Auglaize County, OH, Belmont County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Fulton County, OH, Geauga County, OH, Greene County, OH, Guernsey County, OH, Hancock County, OH, Hardin County, OH, Harrison County, OH, Henry County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Muskingum County, OH, Ottawa County, OH, Paulding County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Putnam County, OH, Richland County, OH, Ross County, OH, Sandusky County, OH, Scioto County, OH, Seneca County, OH, Shelby County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Van Wert County, OH, Wayne County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH
The radar
The Cleveland radar (KCLE), 119 km from the middle of the area, began a volume at 14:16 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
- 80%
- One or more gusts of 65 knots or more
- 40%
- 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
- 90%
Warnings issued inside it
39 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 11:19 AM EDT | Severe Thunderstorm Warning | IWX | Defiance, Fulton, Henry, Williams | 56 min |
| Jul 11, 11:32 AM EDT | Severe Thunderstorm Warning | CLE | Wood | 43 min |
| Jul 11, 11:39 AM EDT | Severe Thunderstorm Warning | IWX | Defiance, Paulding | 51 min |
| Jul 11, 11:57 AM EDT | Severe Thunderstorm Warning | CLE | Hancock | 63 min |
| Jul 11, 12:06 PM EDT | Severe Thunderstorm Warning | IWX | Defiance, Fulton, Henry | 39 min |
| Jul 11, 12:09 PM EDT | Severe Thunderstorm Warning | IWX | Allen, Paulding, Putnam, Van Wert | 66 min |
| Jul 11, 12:18 PM EDT | Severe Thunderstorm Warning | CLE | Lucas, Wood | 57 min |
| Jul 11, 12:41 PM EDT | Severe Thunderstorm Warning | CLE | Ottawa, Sandusky, Seneca | 59 min |
| Jul 11, 12:41 PM EDT | Severe Thunderstorm Warning | IWX | Allen, Van Wert | 49 min |
| Jul 11, 12:42 PM EDT | Severe Thunderstorm Warning | ILN | Auglaize, Hardin, Mercer | 48 min |
| Jul 11, 12:44 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 61 min |
| Jul 11, 12:59 PM EDT | Severe Thunderstorm Warning | CLE | Hancock, Wyandot | 47 min |
| Jul 11, 1:01 PM EDT | Severe Thunderstorm Warning | CLE | Huron, Richland | 44 min |
| Jul 11, 1:07 PM EDT | Severe Thunderstorm Warning | ILN | Auglaize, Champaign, Delaware, Hardin, Logan, Shelby and 1 more | 38 min |
| Jul 11, 1:14 PM EDT | Severe Thunderstorm Warning | CLE | Erie, Huron | 44 min |
| Jul 11, 1:16 PM EDT | Severe Thunderstorm Warning | CLE | Marion, Morrow, Richland | 59 min |
| Jul 11, 1:21 PM EDT | Severe Thunderstorm Warning | CLE | Ashland | 39 min |
| Jul 11, 1:26 PM EDT | Severe Thunderstorm Warning | ILN | Auglaize, Champaign, Logan, Mercer, Miami, Shelby | 49 min |
| Jul 11, 1:38 PM EDT | Severe Thunderstorm Warning | CLE | Knox | 61 min |
| Jul 11, 1:44 PM EDT | Severe Thunderstorm Warning | ILN | Champaign, Clark, Delaware, Franklin, Hardin, Licking and 4 more | 46 min |
| Jul 11, 1:45 PM EDT | Severe Thunderstorm Warning | CLE | Holmes, Wayne | 60 min |
| Jul 11, 2:08 PM EDT | Severe Thunderstorm Warning | PBZ | Carroll, Coshocton, Guernsey, Muskingum, Tuscarawas | 52 min |
| Jul 11, 2:17 PM EDT | Severe Thunderstorm Warning | ILN | Champaign, Clark, Miami | 43 min |
| Jul 11, 2:19 PM EDT | Severe Thunderstorm Warning | ILN | Fairfield, Franklin, Hocking, Licking, Pickaway | 56 min |
| Jul 11, 2:38 PM EDT | Severe Thunderstorm Warning | CLE | Stark, Summit | 67 min |
| Jul 11, 2:49 PM EDT | Severe Thunderstorm Warning | CLE | Ashtabula, Lake | 56 min |
| Jul 11, 2:55 PM EDT | Severe Thunderstorm Warning | ILN | Champaign, Clark, Greene, Madison | 50 min |
| Jul 11, 2:59 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 3 more | 46 min |
| Jul 11, 3:01 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Guernsey, Monroe, Muskingum, Noble | 44 min |
| Jul 11, 3:10 PM EDT | Severe Thunderstorm Warning | CLE | Mahoning, Portage | 65 min |
| Jul 11, 3:14 PM EDT | Severe Thunderstorm Warning | ILN | Fairfield, Hocking, Pickaway, Pike, Ross | 24 min |
| Jul 11, 3:31 PM EDT | Severe Thunderstorm Warning | ILN | Fayette, Franklin, Greene, Madison, Pickaway | 44 min |
| Jul 11, 3:44 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Guernsey, Monroe, Muskingum, Noble | 46 min |
| Jul 11, 3:46 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Carroll, Columbiana, Guernsey, Harrison, Jefferson and 1 more | 44 min |
| Jul 11, 3:50 PM EDT | Severe Thunderstorm Warning | ILN | Clinton, Fayette, Greene | 40 min |
| Jul 11, 4:16 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Jefferson | 44 min |
| Jul 11, 4:30 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Monroe | 45 min |
| Jul 11, 4:44 PM EDT | Severe Thunderstorm Warning | ILN | Adams, Brown, Clinton, Fayette, Highland, Pike and 1 more | 61 min |
| Jul 11, 5:58 PM EDT | Severe Thunderstorm Warning | ILN | Scioto | 37 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 12:00Z, 2.3 hours before the alert went out and 183 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
- 4 J/kg
- Mixed-layer CIN
- -284 J/kg
- Mixed-layer LCL
- 1566 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 149 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 11, 8:10 AM EDT | Mesoscale Discussion | SPC | Defiance, Fulton, Henry, Paulding, Williams | 95 min |
| Jul 11, 8:50 AM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Auglaize, Brown, Butler, Champaign and 51 more | 55 min |
| Jul 11, 10:55 AM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Auglaize, Carroll, Champaign, Columbiana and 38 more | 65 min |
| Jul 11, 12:34 PM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Auglaize, Champaign, Coshocton, Crawford and 42 more | 56 min |
| Jul 11, 1:42 PM EDT | Mesoscale Discussion | SPC | Ashland, Ashtabula, Athens, Auglaize, Belmont, Carroll and 59 more | 93 min |
| Jul 11, 2:16 PM EDT | Severe Thunderstorm Watch | SPC | Athens, Gallia, Jackson, Lawrence, Meigs, Monroe and 5 more | 6 hr |
| Jul 11, 3:43 PM EDT | Mesoscale Discussion | SPC | Adams, Athens, Belmont, Brown, Butler, Carroll and 31 more | 92 min |
| Jul 11, 5:54 PM EDT | Mesoscale Discussion | SPC | Brown, Clermont, Hamilton | 96 min |
| Jul 11, 6:16 PM EDT | Mesoscale Discussion | SPC | Darke, Mercer, Van Wert | 59 min |
| Jul 11, 7:18 PM EDT | Severe Thunderstorm Watch | SPC | Auglaize, Butler, Champaign, Clark, Clinton, Darke and 12 more | 3 hr |
Nearby
Severe Thunderstorm Watches in Ohio, 2011Every severe thunderstorm watch in 2011
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.