Alert archive / Indiana / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 496
The Storm Prediction Center issued this severe thunderstorm watch at Jul 19, 2012, 4:11 PM EDT for 59 counties in Indiana; 8 counties in Kentucky; 4 counties in Ohio. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 19, 2012, 4:11 PM EDT (20:11 UTC)
- Expired
- Jul 19, 2012, 10:41 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 71 counties
Adams 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, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Fountain County, IN, Franklin 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, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Miami County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Ohio County, IN, Owen County, IN, Parke County, IN, Pulaski County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Switzerland County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN, Boone County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Kenton County, KY, Owen County, KY, Pendleton County, KY, Butler County, OH, Darke County, OH, Hamilton County, OH, Preble County, OH
The radar
The Indianapolis radar (KIND), 41 km from the middle of the area, began a volume at 20:11 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
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 4:28 PM EDT | Severe Thunderstorm Warning | IND | Jackson, Lawrence | 47 min |
| Jul 19, 5:54 PM EDT | Severe Thunderstorm Warning | ILN | Switzerland | 51 min |
| Jul 19, 5:59 PM EDT | Severe Thunderstorm Warning | IND | Clinton, Montgomery, Tippecanoe | 31 min |
| Jul 19, 6:29 PM EDT | Severe Thunderstorm Warning | IND | Hendricks, Montgomery, Putnam | 31 min |
| Jul 19, 6:32 PM EDT | Severe Thunderstorm Warning | IND | Boone, Clinton | 28 min |
| Jul 19, 7:48 PM EDT | Severe Thunderstorm Warning | IND | Hancock, Marion, Rush, Shelby | 27 min |
| Jul 19, 9:27 PM EDT | Severe Thunderstorm Warning | IWX | Jay | 28 min |
| Jul 19, 9:45 PM EDT | Severe Thunderstorm Warning | ILN | Dearborn, Franklin | 34 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, 8.2 hours before the alert went out and 206 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
- 1080 J/kg
- Mixed-layer CIN
- -228 J/kg
- Mixed-layer LCL
- 1472 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 111 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 |
|---|---|---|---|---|
| Jul 18, 8:43 PM EDT | Severe Thunderstorm Watch | SPC | Jasper, Lake, Newton, Porter | 5 hr |
| Jul 18, 11:30 PM EDT | Mesoscale Discussion | SPC | Carroll, Cass, Clinton, Elkhart, Fulton, Grant and 20 more | 60 min |
| Jul 19, 3:27 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Benton, Boone, Brown, Carroll, Clay and 25 more | 93 min |
| Jul 19, 3:40 PM EDT | Severe Thunderstorm Watch | SPC | Clark, Crawford, Dubois, Floyd, Harrison, Jefferson and 4 more | 7 hr |
| Jul 19, 7:17 PM EDT | Mesoscale Discussion | SPC | Clark, Crawford, Dubois, Floyd, Harrison, Martin and 3 more | 88 min |
| Jul 19, 2:20 PM EDT | Mesoscale Discussion | SPC | Breathitt, Floyd, Harlan, Johnson, Knott, Leslie and 5 more | 85 min |
Nearby
Severe Thunderstorm Watches in Indiana, 2012Severe Thunderstorm Watches in Kentucky, 2012Severe Thunderstorm Watches in Ohio, 2012Every severe thunderstorm watch in 2012
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.