Alert archive / Indiana / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 407
The Storm Prediction Center issued this severe thunderstorm watch at Jul 10, 2017, 3:58 PM CDT for 35 counties in Illinois; 36 counties in Indiana. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 10, 2017, 3:58 PM CDT (20:58 UTC)
- Expired
- Jul 10, 2017, 11:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 71 counties
Bureau County, IL, Carroll County, IL, Champaign County, IL, Cook County, IL, DeKalb County, IL, DeWitt County, IL, DuPage County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Henry County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Ogle County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Whiteside County, IL, Will County, IL, Woodford County, IL, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Delaware County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Kosciusko County, IN, Lake County, IN, LaPorte County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Porter County, IN, Pulaski County, IN, Starke County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN
The radar
The Chicago radar (KLOT), 52 km from the middle of the area, began a volume at 21:01 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
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- 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
- 60%
Warnings issued inside it
37 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 5:31 PM CDT | Severe Thunderstorm Warning | ILX | Knox, Peoria, Stark | 44 min |
| Jul 10, 5:45 PM CDT | Tornado Warning | ILX | Peoria | 30 min |
| Jul 10, 6:01 PM CDT | Tornado Warning | ILX | Peoria | 29 min |
| Jul 10, 6:03 PM CDT | Tornado Warning | ILX | Marshall, Peoria | 16 min |
| Jul 10, 6:17 PM CDT | Severe Thunderstorm Warning | ILX | Peoria | 43 min |
| Jul 10, 6:29 PM CDT | Severe Thunderstorm Warning | ILX | Fulton | 46 min |
| Jul 10, 6:42 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Mason, Peoria, Tazewell | 48 min |
| Jul 10, 6:45 PM CDT | Tornado Warning | IND | Carroll | 19 min |
| Jul 10, 6:48 PM CDT | Tornado Warning | IWX | Cass | 42 min |
| Jul 10, 6:52 PM CDT | Tornado Warning | ILX | Peoria, Tazewell | 23 min |
| Jul 10, 6:55 PM CDT | Tornado Warning | IWX | Miami, Wabash | 50 min |
| Jul 10, 6:58 PM CDT | Severe Thunderstorm Warning | ILX | Peoria, Tazewell | 47 min |
| Jul 10, 6:59 PM CDT | Tornado Warning | IND | Carroll | 21 min |
| Jul 10, 7:12 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Mason, Peoria, Tazewell | 48 min |
| Jul 10, 7:28 PM CDT | Tornado Warning | IND | Carroll | 18 min |
| Jul 10, 7:29 PM CDT | Severe Thunderstorm Warning | ILX | Tazewell | 46 min |
| Jul 10, 7:31 PM CDT | Tornado Warning | IWX | Wabash | 44 min |
| Jul 10, 7:32 PM CDT | Tornado Warning | IWX | Cass | 26 min |
| Jul 10, 7:34 PM CDT | Tornado Warning | IWX | Miami | 27 min |
| Jul 10, 7:42 PM CDT | Tornado Warning | IWX | Huntington | 48 min |
| Jul 10, 7:44 PM CDT | Tornado Warning | IND | Carroll | 31 min |
| Jul 10, 7:58 PM CDT | Severe Thunderstorm Warning | ILX | Fulton | 32 min |
| Jul 10, 7:59 PM CDT | Tornado Warning | IND | Howard | 46 min |
| Jul 10, 8:02 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt, Logan, McLean, Macon, Tazewell | 43 min |
| Jul 10, 8:06 PM CDT | Tornado Warning | IWX | Huntington, Wabash | 24 min |
| Jul 10, 8:10 PM CDT | Severe Thunderstorm Warning | DVN | McDonough | 50 min |
| Jul 10, 8:17 PM CDT | Tornado Warning | DVN | McDonough | 28 min |
| Jul 10, 8:19 PM CDT | Flash Flood Warning | DVN | McDonough, Warren | 6 hr |
| Jul 10, 8:19 PM CDT | Tornado Warning | ILX | Fulton | 26 min |
| Jul 10, 8:34 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 41 min |
| Jul 10, 8:44 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt, Macon, Moultrie, Piatt | 46 min |
| Jul 10, 8:45 PM CDT | Tornado Warning | ILX | Fulton | 18 min |
| Jul 10, 8:48 PM CDT | Flash Flood Warning | ILX | Fulton | 3 hr |
| Jul 10, 9:34 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kendall | 41 min |
| Jul 10, 10:21 PM CDT | Flash Flood Warning | IND | Carroll, Howard | 4 hr |
| Jul 10, 10:32 PM CDT | Tornado Warning | IND | Carroll, Howard | 28 min |
| Jul 10, 10:36 PM CDT | Tornado Warning | IWX | Cass | 39 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, 9.0 hours before the alert went out and 115 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
- 1522 J/kg
- Mixed-layer CIN
- -136 J/kg
- Mixed-layer LCL
- 1184 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 1:49 AM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, Henderson, Henry, Jo Daviess, Knox and 5 more | 116 min |
| Jul 10, 6:46 AM CDT | Mesoscale Discussion | SPC | Champaign, Coles, DeWitt, Douglas, Edgar, Ford and 17 more | 119 min |
| Jul 10, 2:48 PM CDT | Mesoscale Discussion | SPC | Bureau, Ford, Grundy, Iroquois, Kankakee, LaSalle and 8 more | 117 min |
| Jul 10, 6:18 PM CDT | Mesoscale Discussion | SPC | Bureau, Champaign, DeWitt, Ford, Fulton, Grundy and 21 more | 87 min |
Nearby
Severe Thunderstorm Watches in Indiana, 2017Severe Thunderstorm Watches in Illinois, 2017Every severe thunderstorm watch in 2017
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.