Alert archive / Indiana / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 198
The Storm Prediction Center issued this severe thunderstorm watch at Apr 28, 2012, 4:33 PM EDT for 26 counties in Indiana; 22 counties in Kentucky. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 28, 2012, 4:33 PM EDT (20:33 UTC)
- Expired
- Apr 28, 2012, 10:12 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 48 counties
Bartholomew County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Crawford County, IN, Daviess County, IN, Dubois County, IN, Floyd County, IN, Gibson County, IN, Greene County, IN, Harrison County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Orange County, IN, Owen County, IN, Pike County, IN, Scott County, IN, Sullivan County, IN, Switzerland County, IN, Vigo County, IN, Washington County, IN, Anderson County, KY, Bullitt County, KY, Carroll County, KY, Fayette County, KY, Franklin County, KY, Gallatin County, KY, Garrard County, KY, Grant County, KY, Henry County, KY, Jefferson County, KY, Jessamine County, KY, Madison County, KY, Mercer County, KY, Nelson County, KY, Oldham County, KY, Owen County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Trimble County, KY, Washington County, KY, Woodford County, KY
The radar
The Indianapolis radar (KIND), 95 km from the middle of the area, began a volume at 20:36 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
- 30%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 5:26 PM EDT | Severe Thunderstorm Warning | IND | Daviess, Greene, Knox, Sullivan | 49 min |
| Apr 28, 5:39 PM EDT | Flash Flood Warning | IND | Knox, Sullivan | 3 hr |
| Apr 28, 5:59 PM EDT | Tornado Warning | IND | Daviess, Knox, Martin | 31 min |
| Apr 28, 6:22 PM EDT | Severe Thunderstorm Warning | LMK | Crawford, Dubois, Orange | 38 min |
| Apr 28, 6:28 PM EDT | Tornado Warning | IND | Daviess, Lawrence, Martin | 19 min |
| Apr 28, 6:59 PM EDT | Severe Thunderstorm Warning | LMK | Clark, Crawford, Floyd, Harrison, Orange, Washington | 46 min |
| Apr 28, 7:08 PM EDT | Severe Thunderstorm Warning | LMK | Crawford, Harrison | 37 min |
| Apr 28, 7:35 PM EDT | Severe Thunderstorm Warning | LMK | Clark, Floyd, Harrison | 40 min |
| Apr 28, 8:10 PM EDT | Severe Thunderstorm Warning | LMK | Bullitt, Jefferson, Shelby, Spencer | 35 min |
| Apr 28, 8:33 PM EDT | Severe Thunderstorm Warning | LMK | Anderson, Nelson, Shelby, Spencer | 27 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 12:00Z, 8.6 hours before the alert went out and 226 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
- 1821 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 230 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 28, 2:17 PM EDT | Mesoscale Discussion | SPC | Gibson, Knox | 88 min |
| Apr 28, 3:56 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Crawford, Daviess, Dubois and 20 more | 64 min |
| Apr 28, 6:15 PM EDT | Tornado Watch | SPC | Crawford, Dubois, Gibson, Harrison, Orange, Perry and 5 more | 5 hr |
| Apr 28, 6:59 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Clay, Crawford, Daviess and 21 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Indiana, 2012Severe Thunderstorm Watches in Kentucky, 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.