Alert archive / Indiana / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 88
The Storm Prediction Center issued this severe thunderstorm watch at Apr 4, 2011, 5:30 AM EDT for 4 states. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 4, 2011, 5:30 AM EDT (09:30 UTC)
- Expired
- Apr 4, 2011, 1:00 PM EDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 96 counties
Adams County, IN, Allen County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Clay County, IN, Daviess County, IN, Dearborn County, IN, Decatur County, IN, DeKalb County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Huntington County, IN, Jackson County, IN, Jay 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, Morgan County, IN, Ohio County, IN, Owen County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Steuben County, IN, Sullivan County, IN, Switzerland County, IN, Union County, IN, Wayne County, IN, Wells County, IN, Boone County, KY, Campbell County, KY, Kenton County, KY, Branch County, MI, Hillsdale County, MI, Lenawee County, MI, Monroe County, MI, Allen County, OH, Auglaize County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Fayette County, OH, Fulton County, OH, Greene County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Highland County, OH, Huron County, OH, Logan County, OH, Lucas County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Preble County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Warren County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH
The radar
The Northern Indiana radar (KIWX), 115 km from the middle of the area, began a volume at 09:31 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
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 5:30 AM EDT | Severe Thunderstorm Warning | IWX | Allen, Blackford, Grant, Huntington, Wabash, Wells and 1 more | 45 min |
| Apr 4, 5:47 AM EDT | Severe Thunderstorm Warning | IND | Delaware, Madison, Tipton | 28 min |
| Apr 4, 5:48 AM EDT | Severe Thunderstorm Warning | IWX | Allen | 31 min |
| Apr 4, 5:53 AM EDT | Severe Thunderstorm Warning | DTX | Lenawee | 37 min |
| Apr 4, 6:02 AM EDT | Severe Thunderstorm Warning | IWX | Adams, Jay, Wells | 28 min |
| Apr 4, 6:10 AM EDT | Severe Thunderstorm Warning | ILN | Auglaize, Darke, Mercer | 50 min |
| Apr 4, 6:12 AM EDT | Severe Thunderstorm Warning | IND | Delaware | 19 min |
| Apr 4, 6:16 AM EDT | Severe Thunderstorm Warning | IWX | Van Wert | 27 min |
| Apr 4, 6:27 AM EDT | Severe Thunderstorm Warning | IND | Sullivan, Vigo | 32 min |
| Apr 4, 7:03 AM EDT | Severe Thunderstorm Warning | IND | Hendricks, Marion, Morgan, Owen, Putnam | 42 min |
| Apr 4, 7:08 AM EDT | Severe Thunderstorm Warning | IND | Brown, Monroe, Morgan, Owen | 35 min |
| Apr 4, 7:26 AM EDT | Severe Thunderstorm Warning | IND | Brown, Johnson, Morgan | 23 min |
| Apr 4, 7:41 AM EDT | Severe Thunderstorm Warning | IND | Shelby | 22 min |
| Apr 4, 7:56 AM EDT | Severe Thunderstorm Warning | IND | Rush, Shelby | 28 min |
| Apr 4, 7:59 AM EDT | Severe Thunderstorm Warning | IND | Sullivan, Vigo | 24 min |
| Apr 4, 8:01 AM EDT | Severe Thunderstorm Warning | ILN | Darke, Miami | 29 min |
| Apr 4, 8:10 AM EDT | Severe Thunderstorm Warning | ILN | Fayette, Franklin, Union, Wayne | 50 min |
| Apr 4, 8:54 AM EDT | Severe Thunderstorm Warning | ILN | Clark, Fayette, Greene, Madison, Montgomery | 51 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 00:00Z, 9.5 hours before the alert went out and 158 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2409 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 429 m²/s²
- 0-3 km storm-relative helicity
- 944 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 |
|---|---|---|---|---|
| Apr 3, 9:54 PM EDT | Severe Thunderstorm Watch | SPC | Lake, Porter | 5 hr |
| Apr 4, 5:20 AM EDT | Mesoscale Discussion | SPC | Adams, Allen, Bartholomew, Blackford, Boone, Brown and 48 more | 25 min |
| Apr 4, 7:53 AM EDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 39 more | 2 hr |
| Apr 4, 8:22 AM EDT | Tornado Watch | SPC | Clark, Crawford, Dubois, Floyd, Gibson, Harrison and 10 more | 7 hr |
| Apr 4, 12:34 PM EDT | Tornado Watch | SPC | Clark, Crawford, Floyd, Harrison, Jefferson, Orange and 3 more | 5 hr |
| Apr 4, 12:50 PM EDT | Mesoscale Discussion | SPC | Dearborn, Decatur, Franklin, Jennings, Ohio, Ripley and 1 more | 25 min |
| Apr 4, 2:25 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 74 more | 65 min |
| Apr 4, 3:05 PM EDT | Severe Thunderstorm Watch | SPC | Bath, Bell, Boyd, Breathitt, Carter, Clay and 33 more | 6 hr |
| Apr 4, 3:08 PM EDT | Mesoscale Discussion | SPC | Allen, Clinton, Cumberland, McCreary, Monroe, Russell and 2 more | 67 min |
| Apr 4, 4:49 PM EDT | Mesoscale Discussion | SPC | Bell, Boyd, Breathitt, Carter, Clay, Elliott and 21 more | 56 min |
| Apr 4, 6:00 PM EDT | Mesoscale Discussion | SPC | Bell, Boyd, Breathitt, Clay, Floyd, Harlan and 12 more | 90 min |
| Apr 3, 10:31 PM EDT | Mesoscale Discussion | SPC | Allegan, Barry, Calhoun, Cass, Clare, Clinton and 20 more | 89 min |
| Apr 4, 2:53 AM EDT | Mesoscale Discussion | SPC | Allegan, Barry, Berrien, Calhoun, Cass, Clare and 19 more | 97 min |
| Apr 4, 4:12 PM EDT | Mesoscale Discussion | SPC | Athens, Belmont, Carroll, Columbiana, Coshocton, Guernsey and 12 more | 63 min |
Nearby
Severe Thunderstorm Watches in Indiana, 2011Severe Thunderstorm Watches in Ohio, 2011Severe Thunderstorm Watches in Michigan, 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.