Alert archive / Indiana / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 270
The Storm Prediction Center issued this severe thunderstorm watch at May 26, 2017, 8:09 PM EDT for 29 counties in Indiana; Butler County, Darke County, Preble County, Ohio. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- May 26, 2017, 8:09 PM EDT (00:09 UTC)
- Expired
- May 26, 2017, 11:15 PM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 32 counties
Bartholomew County, IN, Boone County, IN, Carroll County, IN, Clinton County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Fountain County, IN, Franklin County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Montgomery County, IN, Morgan 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, Warren County, IN, Wayne County, IN, Butler County, OH, Darke County, OH, Preble County, OH
The radar
The Indianapolis radar (KIND), 30 km from the middle of the area, began a volume at 00:13 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
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 8:38 PM EDT | Severe Thunderstorm Warning | IND | Hendricks, Marion | 37 min |
| May 26, 8:57 PM EDT | Severe Thunderstorm Warning | IND | Hamilton, Hancock, Madison, Marion | 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
Cncnati-Daytn, OH (KILN), launched 00:00Z, 0.2 hours before the alert went out and 209 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
- 1715 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 125 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 |
|---|---|---|---|---|
| May 26, 10:28 PM EDT | Mesoscale Discussion | SPC | Adams, Bartholomew, Blackford, Boone, Brown, Carroll and 34 more | 92 min |
| May 27, 1:50 PM EDT | Mesoscale Discussion | SPC | Clark, Crawford, Dearborn, Floyd, Harrison, Jackson and 9 more | 85 min |
| May 27, 2:16 PM EDT | Mesoscale Discussion | SPC | Dubois, Gibson, Pike, Posey, Spencer, Vanderburgh and 1 more | 59 min |
| May 27, 2:36 PM EDT | Severe Thunderstorm Watch | SPC | Clark, Crawford, Dubois, Floyd, Gibson, Harrison and 10 more | 7 hr |
| May 27, 4:11 PM EDT | Severe Thunderstorm Watch | SPC | Ohio, Switzerland | 6 hr |
| May 27, 4:50 PM EDT | Mesoscale Discussion | SPC | Clark, Crawford, Dubois, Floyd, Gibson, Harrison and 8 more | 85 min |
| May 27, 6:13 PM EDT | Severe Thunderstorm Watch | SPC | Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick | 7 hr |
Nearby
Severe Thunderstorm Watches in Indiana, 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.