Alert archive / Indiana / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 208
The Storm Prediction Center issued this severe thunderstorm watch at Apr 30, 2012, 3:07 PM EDT for 62 counties in Indiana; 30 counties in Kentucky. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 30, 2012, 3:07 PM EDT (19:07 UTC)
- Expired
- Apr 30, 2012, 11:47 PM EDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 92 counties
Adams County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Carroll County, IN, Cass County, IN, Clark County, IN, Clay County, IN, Clinton County, IN, Crawford County, IN, Daviess County, IN, Decatur County, IN, Delaware County, IN, Dubois County, IN, Floyd County, IN, Fountain County, IN, Gibson County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Harrison County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jackson County, IN, Jay County, IN, Jefferson 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, Orange County, IN, Owen County, IN, Parke County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Spencer County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vanderburgh County, IN, Vigo County, IN, Wabash County, IN, Warrick County, IN, Washington County, IN, Wells County, IN, Allen County, KY, Barren County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Daviess County, KY, Edmonson County, KY, Grayson County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Henderson County, KY, Henry County, KY, Hopkins County, KY, Jefferson County, KY, Larue County, KY, Logan County, KY, McLean County, KY, Meade County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Oldham County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Trimble County, KY, Union County, KY, Warren County, KY, Webster County, KY
The radar
The Evansville,IN radar (KVWX), 81 km from the middle of the area, began a volume at 19:07 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
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 4:43 PM EDT | Severe Thunderstorm Warning | PAH | Caldwell, Christian, Hopkins, Trigg | 32 min |
| Apr 30, 4:59 PM EDT | Severe Thunderstorm Warning | LMK | Perry | 46 min |
| Apr 30, 5:22 PM EDT | Severe Thunderstorm Warning | IWX | Grant, Huntington, Wells | 38 min |
| Apr 30, 5:52 PM EDT | Severe Thunderstorm Warning | LMK | Harrison | 23 min |
| Apr 30, 5:58 PM EDT | Severe Thunderstorm Warning | IWX | Adams, Wells | 38 min |
| Apr 30, 6:16 PM EDT | Severe Thunderstorm Warning | LMK | Butler, Logan, Simpson, Warren | 29 min |
| Apr 30, 7:05 PM EDT | Severe Thunderstorm Warning | LMK | Allen, Barren, Edmonson, Hart, Warren | 25 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, 7.1 hours before the alert went out and 214 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
- 34 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 605 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -42 m²/s²
- 0-3 km storm-relative helicity
- -20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 1:03 PM EDT | Mesoscale Discussion | SPC | Alexander, Clark, Clay, Crawford, Cumberland, Edgar and 20 more | 117 min |
| Apr 30, 4:52 PM EDT | Mesoscale Discussion | SPC | Adams, Bartholomew, Blackford, Brown, Clark, Crawford and 38 more | 83 min |
| Apr 30, 6:04 PM EDT | Severe Thunderstorm Watch | SPC | Dearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more | 7 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.