Alert archive / Indiana / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 633
The Storm Prediction Center issued this severe thunderstorm watch at Jul 11, 2011, 7:18 PM EDT for 36 counties in Indiana; 18 counties in Ohio. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 11, 2011, 7:18 PM EDT (23:18 UTC)
- Expired
- Jul 11, 2011, 10:17 PM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 54 counties
Adams County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Fountain County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Montgomery County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Vermillion County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Darke County, OH, Fayette County, OH, Greene County, OH, Hardin County, OH, Logan County, OH, Madison County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Preble County, OH, Shelby County, OH, Union County, OH, Warren County, OH
The radar
The Indianapolis radar (KIND), 85 km from the middle of the area, began a volume at 23:19 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
- 30%
- 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
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 7:19 PM EDT | Severe Thunderstorm Warning | ILN | Champaign, Clark, Darke, Miami, Shelby | 41 min |
| Jul 11, 7:43 PM EDT | Severe Thunderstorm Warning | IND | Carroll, Clinton, Howard, Tipton | 32 min |
| Jul 11, 7:58 PM EDT | Severe Thunderstorm Warning | ILN | Champaign, Clark, Greene, Miami, Montgomery, Shelby | 47 min |
| Jul 11, 8:04 PM EDT | Severe Thunderstorm Warning | ILN | Wayne | 41 min |
| Jul 11, 8:09 PM EDT | Severe Thunderstorm Warning | IND | Carroll | 21 min |
| Jul 11, 8:11 PM EDT | Severe Thunderstorm Warning | IND | Clinton, Howard, Tipton | 34 min |
| Jul 11, 8:11 PM EDT | Severe Thunderstorm Warning | IND | Randolph | 14 min |
| Jul 11, 8:32 PM EDT | Severe Thunderstorm Warning | IND | Clinton, Tipton | 43 min |
| Jul 11, 8:38 PM EDT | Severe Thunderstorm Warning | ILN | Clark, Greene, Miami, Montgomery, Warren | 52 min |
| Jul 11, 8:51 PM EDT | Severe Thunderstorm Warning | ILN | Wayne | 39 min |
| Jul 11, 9:07 PM EDT | Severe Thunderstorm Warning | ILN | Clinton, Fayette, Greene, Highland, Ross, Warren | 38 min |
| Jul 11, 9:08 PM EDT | Severe Thunderstorm Warning | IND | Boone, Clinton, Hamilton, Tipton | 52 min |
| Jul 11, 9:28 PM EDT | Severe Thunderstorm Warning | ILN | Union, Wayne | 62 min |
| Jul 11, 9:31 PM EDT | Severe Thunderstorm Warning | IND | Boone, Hamilton, Hancock, Hendricks, Madison, Marion | 39 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, 10:07 PM EDT | Severe Thunderstorm Warning | ILN | Franklin, Union | 53 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 12:00Z, 11.3 hours before the alert went out and 218 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
- 95 J/kg
- Mixed-layer CIN
- -371 J/kg
- Mixed-layer LCL
- 1367 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 143 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, 6:37 AM EDT | Severe Thunderstorm Watch | SPC | Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 22 more | 6 hr |
| Jul 11, 8:10 AM EDT | Mesoscale Discussion | SPC | Allen, Cass, DeKalb, Elkhart, Fulton, Huntington and 17 more | 95 min |
| Jul 11, 8:50 AM EDT | Mesoscale Discussion | SPC | Adams, Allen, Bartholomew, Benton, Blackford, Boone and 68 more | 55 min |
| Jul 11, 10:55 AM EDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, Carroll, Cass, Clinton and 26 more | 65 min |
| Jul 11, 12:34 PM EDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, Delaware, Grant, Huntington and 5 more | 56 min |
| Jul 11, 3:43 PM EDT | Mesoscale Discussion | SPC | Dearborn, Ohio, Ripley, Switzerland | 92 min |
| Jul 11, 5:54 PM EDT | Mesoscale Discussion | SPC | Dearborn, Franklin, Ohio | 96 min |
| Jul 11, 6:16 PM EDT | Mesoscale Discussion | SPC | Adams, Allen, Benton, Blackford, Boone, Carroll and 28 more | 59 min |
| Jul 11, 10:16 AM EDT | Severe Thunderstorm Watch | SPC | Adams, Allen, Ashland, Ashtabula, Auglaize, Belmont and 64 more | 9 hr |
| 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 |
Nearby
Severe Thunderstorm Watches in Indiana, 2011Severe 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.