Alert archive / Indiana / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 37
The Storm Prediction Center issued this severe thunderstorm watch at Feb 24, 2017, 3:44 PM EST for 58 counties in Indiana; 20 counties in Michigan; 8 counties in Ohio. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 24, 2017, 3:44 PM EST (20:44 UTC)
- Expired
- Feb 24, 2017, 10:00 PM EST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 86 counties
Adams County, IN, Allen County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Daviess County, IN, Decatur County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jackson County, IN, Jay County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Kosciusko County, IN, LaGrange County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Martin County, IN, Miami County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Noble County, IN, Owen County, IN, Parke County, IN, Pulaski County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Steuben County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vigo County, IN, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Branch County, MI, Calhoun County, MI, Eaton County, MI, Genesee County, MI, Hillsdale County, MI, Ingham County, MI, Jackson County, MI, Kalamazoo County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saint Clair County, MI, Saint Joseph County, MI, Sanilac County, MI, Shiawassee County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Defiance County, OH, Fulton County, OH, Henry County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH
The radar
The Northern Indiana radar (KIWX), 41 km from the middle of the area, began a volume at 20:46 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
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 24, 4:20 PM EST | Severe Thunderstorm Warning | IWX | Marshall, Saint Joseph | 40 min |
| Feb 24, 4:26 PM EST | Severe Thunderstorm Warning | IWX | Cass, Saint Joseph | 34 min |
| Feb 24, 4:41 PM EST | Severe Thunderstorm Warning | IWX | Elkhart, Marshall, Saint Joseph | 24 min |
| Feb 24, 4:59 PM EST | Severe Thunderstorm Warning | IWX | Cass, Saint Joseph | 20 min |
| Feb 24, 5:20 PM EST | Severe Thunderstorm Warning | IND | Decatur, Rush | 25 min |
| Feb 24, 5:27 PM EST | Severe Thunderstorm Warning | IND | Decatur, Jackson, Jennings | 33 min |
| Feb 24, 5:42 PM EST | Severe Thunderstorm Warning | IND | Decatur | 33 min |
| Feb 24, 5:56 PM EST | Severe Thunderstorm Warning | IND | Decatur, Jennings | 19 min |
| Feb 24, 8:56 PM EST | Severe Thunderstorm Warning | IWX | Fulton, Williams | 18 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
Detroit, MI (KDTX), launched 12:00Z, 8.7 hours before the alert went out and 204 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
- 400 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 761 m²/s²
- 0-3 km storm-relative helicity
- 846 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 23, 10:48 PM EST | Mesoscale Discussion | SPC | Henderson | 2 hr |
| Feb 24, 3:07 PM EST | Mesoscale Discussion | SPC | Clark, Crawford, Cumberland, Edgar, Vermilion | 2 hr |
| Feb 24, 5:56 PM EST | Mesoscale Discussion | SPC | Adams, Allen, Bartholomew, Blackford, Boone, Brown and 46 more | 94 min |
| Feb 24, 6:28 PM EST | Mesoscale Discussion | SPC | Clark, Floyd, Harrison, Jefferson, Scott, Switzerland | 62 min |
| Feb 24, 6:36 PM EST | Severe Thunderstorm Watch | SPC | Clark, Dearborn, Fayette, Franklin, Jefferson, Ohio and 4 more | 6 hr |
| Feb 24, 2:45 PM EST | Mesoscale Discussion | SPC | Lenawee, Monroe, Washtenaw, Wayne | 60 min |
| Feb 24, 6:03 PM EST | Mesoscale Discussion | SPC | Alcona, Alpena, Arenac, Bay, Clare, Crawford and 17 more | 87 min |
Nearby
Severe Thunderstorm Watches in Indiana, 2017Severe Thunderstorm Watches in Michigan, 2017Severe Thunderstorm Watches in Ohio, 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.