Alert archive / Kentucky / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 217
The Storm Prediction Center issued this severe thunderstorm watch at May 1, 2012, 2:44 PM EDT for 5 counties in Indiana; 65 counties in Kentucky. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 1, 2012, 2:44 PM EDT (18:44 UTC)
- Expired
- May 1, 2012, 9:07 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 70 counties
Crawford County, IN, Dubois County, IN, Floyd County, IN, Harrison County, IN, Perry County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Bath County, KY, Bourbon County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Casey County, KY, Clark County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Elliott County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Harrison County, KY, Hart County, KY, Jackson County, KY, Jefferson County, KY, Jessamine County, KY, Larue County, KY, Laurel County, KY, Lee County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Marion County, KY, McCreary County, KY, Meade County, KY, Menifee County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Montgomery County, KY, Morgan County, KY, Nelson County, KY, Nicholas County, KY, Ohio County, KY, Oldham County, KY, Owsley County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Rowan County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Wolfe County, KY, Woodford County, KY
The radar
The Louisville radar (KLVX), 72 km from the middle of the area, began a volume at 18:44 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
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 3:26 PM EDT | Severe Thunderstorm Warning | LMK | Breckinridge, Hardin, Meade | 34 min |
| May 1, 3:40 PM EDT | Severe Thunderstorm Warning | LMK | Marion, Washington | 35 min |
| May 1, 4:11 PM EDT | Severe Thunderstorm Warning | LMK | Bullitt, Hardin, Nelson | 34 min |
| May 1, 4:34 PM EDT | Severe Thunderstorm Warning | LMK | Bullitt, Nelson, Spencer | 26 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
Nashville Metro, TN (KBNA), launched 12:00Z, 6.7 hours before the alert went out and 169 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
- 1383 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 880 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- -1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 2:44 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Boone, Brown, Clay, Daviess, Dearborn and 29 more | 61 min |
| May 1, 3:01 PM EDT | Tornado Watch | SPC | Bartholomew, Boone, Brown, Carroll, Clark, Clay and 46 more | 7 hr |
| May 1, 4:39 PM EDT | Mesoscale Discussion | SPC | Benton, Clay, Fountain, Parke, Vermillion, Vigo and 1 more | 2 hr |
| May 1, 6:31 PM EDT | Tornado Watch | SPC | Dearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more | 5 hr |
| May 1, 6:55 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Boone, Brown, Carroll, Clark, Clay and 32 more | 65 min |
| Apr 30, 9:07 PM EDT | Mesoscale Discussion | SPC | Anderson, Bath, Boone, Bourbon, Boyd, Boyle and 52 more | 53 min |
| May 1, 1:33 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Butler, Casey, Clinton and 17 more | 117 min |
| May 1, 6:13 PM EDT | Mesoscale Discussion | SPC | Boyd | 62 min |
Nearby
Severe Thunderstorm Watches in Kentucky, 2012Severe Thunderstorm Watches in Indiana, 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.