Alert archive / Indiana / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 341
The Storm Prediction Center issued this severe thunderstorm watch at May 23, 2011, 12:54 PM CDT for 19 counties in Illinois; 39 counties in Indiana. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 23, 2011, 12:54 PM CDT (17:54 UTC)
- Expired
- May 23, 2011, 6:22 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 65 kt
All 58 counties
Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Jasper County, IL, Lawrence County, IL, Macon County, IL, Moultrie County, IL, Piatt County, IL, Richland County, IL, Shelby County, IL, Vermilion County, IL, Bartholomew County, IN, Boone County, IN, Brown County, IN, Carroll County, IN, Clay County, IN, Clinton County, IN, Daviess County, IN, Decatur County, IN, Delaware County, IN, Fountain County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Jackson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN
The radar
The Indianapolis radar (KIND), 86 km from the middle of the area, began a volume at 17:59 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
- 70%
- One or more gusts of 65 knots or more
- 50%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 1:21 PM CDT | Severe Thunderstorm Warning | ILX | Christian, Effingham, Moultrie, Shelby | 54 min |
| May 23, 2:14 PM CDT | Severe Thunderstorm Warning | ILX | Clay, Crawford, Jasper, Lawrence, Richland | 61 min |
| May 23, 2:17 PM CDT | Severe Thunderstorm Warning | ILX | Cumberland, Effingham, Jasper, Shelby | 58 min |
| May 23, 2:42 PM CDT | Severe Thunderstorm Warning | ILX | Clark, Crawford, Edgar | 63 min |
| May 23, 2:50 PM CDT | Severe Thunderstorm Warning | IND | Knox, Sullivan, Vigo | 40 min |
| May 23, 2:51 PM CDT | Severe Thunderstorm Warning | ILX | Lawrence | 54 min |
| May 23, 3:15 PM CDT | Severe Thunderstorm Warning | ILX | Lawrence | 30 min |
| May 23, 3:21 PM CDT | Severe Thunderstorm Warning | IND | Parke, Vermillion | 24 min |
| May 23, 3:27 PM CDT | Severe Thunderstorm Warning | IND | Clay, Daviess, Greene, Knox, Martin, Owen and 2 more | 48 min |
| May 23, 3:40 PM CDT | Severe Thunderstorm Warning | IND | Clay, Parke, Putnam, Vermillion, Vigo | 35 min |
| May 23, 3:51 PM CDT | Severe Thunderstorm Warning | IND | Fountain, Montgomery, Parke, Putnam, Vermillion, Warren | 39 min |
| May 23, 3:53 PM CDT | Severe Thunderstorm Warning | IND | Hendricks, Marion, Morgan | 37 min |
| May 23, 4:06 PM CDT | Severe Thunderstorm Warning | IND | Brown, Lawrence, Monroe, Morgan, Owen | 24 min |
| May 23, 4:25 PM CDT | Severe Thunderstorm Warning | IND | Bartholomew, Brown, Hancock, Hendricks, Jackson, Johnson and 5 more | 50 min |
| May 23, 4:30 PM CDT | Tornado Warning | IND | Jackson, Lawrence | 30 min |
| May 23, 4:44 PM CDT | Severe Thunderstorm Warning | IND | Boone, Clinton, Montgomery | 31 min |
| May 23, 4:45 PM CDT | Tornado Warning | IND | Hancock, Johnson, Shelby | 45 min |
| May 23, 4:56 PM CDT | Tornado Warning | IND | Bartholomew, Decatur, Shelby | 34 min |
| May 23, 5:01 PM CDT | Severe Thunderstorm Warning | IND | Bartholomew, Decatur, Hancock, Jackson, Jennings, Rush and 1 more | 44 min |
| May 23, 5:08 PM CDT | Tornado Warning | IND | Jennings | 18 min |
| May 23, 5:15 PM CDT | Severe Thunderstorm Warning | IND | Delaware, Hamilton, Hancock, Henry, Madison, Rush | 45 min |
| May 23, 5:45 PM CDT | Severe Thunderstorm Warning | IND | Delaware, Henry, Randolph | 33 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
Lincoln, IL (KILX), launched 12:00Z, 5.9 hours before the alert went out and 125 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
- 504 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 1171 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 7:52 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Clinton, Greene, Jersey, Macoupin and 6 more | 53 min |
| May 22, 8:26 PM CDT | Tornado Watch | SPC | Bond, Calhoun, Cass, Champaign, Christian, Clay and 35 more | 8 hr |
| May 22, 9:35 PM CDT | Mesoscale Discussion | SPC | DeKalb, DuPage, Grundy, Iroquois, Kane, Kankakee and 6 more | 55 min |
| May 22, 10:24 PM CDT | Mesoscale Discussion | SPC | Clark, Clay, Coles, Crawford, Cumberland, Edgar and 9 more | 66 min |
| May 23, 7:25 AM CDT | Mesoscale Discussion | SPC | Edgar, Vermilion | 65 min |
| May 23, 10:55 AM CDT | Severe Thunderstorm Watch | SPC | Alexander, Bond, Calhoun, Clinton, Edwards, Fayette and 27 more | 7 hr |
| May 23, 12:37 PM CDT | Mesoscale Discussion | SPC | Bond, Christian, Clark, Clay, Clinton, Coles and 34 more | 83 min |
| May 23, 2:52 PM CDT | Mesoscale Discussion | SPC | Clark, Clay, Coles, Crawford, Cumberland, Edgar and 8 more | 53 min |
| May 23, 3:58 PM CDT | Mesoscale Discussion | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 14 more | 92 min |
| May 23, 4:24 PM CDT | Mesoscale Discussion | SPC | Massac | 96 min |
| May 22, 7:20 PM CDT | Mesoscale Discussion | SPC | Adams, Allen, Benton, Blackford, Boone, Carroll and 33 more | 115 min |
| May 22, 9:59 PM CDT | Mesoscale Discussion | SPC | Allen, Carroll, Cass, DeKalb, Elkhart, Fulton and 14 more | 61 min |
| May 23, 3:20 AM CDT | Mesoscale Discussion | SPC | Clark, Floyd, Harrison, Jefferson, Ohio, Scott and 1 more | 85 min |
| May 23, 11:35 AM CDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 13 more | 85 min |
| May 23, 1:15 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 15 more | 8 hr |
| May 23, 3:28 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Crawford, Dearborn, Dubois, Fayette, Floyd and 12 more | 6 hr |
| May 23, 5:20 PM CDT | Mesoscale Discussion | SPC | Clark, Crawford, Dearborn, Decatur, Fayette, Floyd and 15 more | 55 min |
| May 23, 5:40 PM CDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, DeKalb, Grant, Howard and 8 more | 65 min |
Nearby
Severe Thunderstorm Watches in Indiana, 2011Severe Thunderstorm Watches in Illinois, 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.