Alert archive / Ohio / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 635
The Storm Prediction Center issued this severe thunderstorm watch at Jul 11, 2011, 9:22 PM EDT for 4 states. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 11, 2011, 9:22 PM EDT (01:22 UTC)
- Expired
- Jul 12, 2011, 12:51 AM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 71 counties
Dearborn County, IN, Fayette County, IN, Franklin County, IN, Ohio County, IN, Ripley County, IN, Switzerland County, IN, Union County, IN, Wayne County, IN, Boone County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Carter County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Butler County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Darke County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Lawrence County, OH, Licking 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, Pike County, OH, Preble County, OH, Ross County, OH, Scioto County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Cabell County, WV, Jackson County, WV, Marshall County, WV, Mason County, WV, Pleasants County, WV, Ritchie County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Cincinnati radar (KILN), 43 km from the middle of the area, began a volume at 01:23 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
- 40%
- One or more gusts of 65 knots or more
- 30%
- 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
- 70%
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 9:28 PM EDT | Severe Thunderstorm Warning | ILN | Union, Wayne | 62 min |
| Jul 11, 9:31 PM EDT | Severe Thunderstorm Warning | ILN | Greene, Montgomery, Warren | 44 min |
| Jul 11, 9:31 PM EDT | Severe Thunderstorm Warning | ILN | Fayette, Pickaway, Ross | 44 min |
| Jul 11, 9:39 PM EDT | Severe Thunderstorm Warning | ILN | Adams, Highland, Pike, Ross | 51 min |
| Jul 11, 9:54 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Perry | 36 min |
| Jul 11, 10:07 PM EDT | Severe Thunderstorm Warning | ILN | Franklin, Union | 53 min |
| Jul 11, 10:18 PM EDT | Severe Thunderstorm Warning | ILN | Clinton, Highland | 42 min |
| Jul 11, 11:04 PM EDT | Flash Flood Warning | RLX | Athens, Washington | 3 hr |
| Jul 11, 11:35 PM EDT | Severe Thunderstorm Warning | ILN | Lewis, Mason | 40 min |
| Jul 12, 12:05 AM EDT | Flash Flood Warning | RLX | Boyd, Carter, Greenup, Lawrence | 2 hr |
| Jul 12, 12:50 AM EDT | Flash Flood Warning | ILN | Lewis, Mason | 4 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 2:00 PM EDT | Mesoscale Discussion | SPC | Gibson, Knox, Posey | 2 hr |
| Jul 12, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick | 7 hr |
| Jul 12, 4:48 PM EDT | Mesoscale Discussion | SPC | Gibson, Posey | 87 min |
| Jul 12, 7:43 PM EDT | Mesoscale Discussion | SPC | Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick | 62 min |
| Jul 11, 11:22 PM EDT | Mesoscale Discussion | SPC | Bath, Breathitt, Clay, Elliott, Estill, Fleming and 20 more | 83 min |
| Jul 12, 1:18 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bourbon, Boyle and 35 more | 87 min |
| Jul 11, 8:51 PM EDT | Mesoscale Discussion | SPC | Athens, Belmont, Coshocton, Delaware, Fairfield, Franklin and 21 more | 54 min |
Nearby
Severe Thunderstorm Watches in Ohio, 2011Severe Thunderstorm Watches in Kentucky, 2011Severe Thunderstorm Watches in West Virginia, 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; radar from the NEXRAD Level II archive.