Alert archive / Kentucky / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 722
The Storm Prediction Center issued this severe thunderstorm watch at Aug 3, 2011, 4:02 PM CDT for 52 counties in Kentucky. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 3, 2011, 4:02 PM CDT (21:02 UTC)
- Expired
- Aug 3, 2011, 9:50 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 52 counties
Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Bourbon County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Casey County, KY, Christian County, KY, Clark County, KY, Clinton County, KY, Cumberland County, KY, Daviess County, KY, Edmonson County, KY, Fayette County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Hopkins County, KY, Jessamine County, KY, Larue County, KY, Laurel County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Marion County, KY, McCreary County, KY, McLean County, KY, Meade County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Woodford County, KY
The radar
The Louisville radar (KLVX), 61 km from the middle of the area, began a volume at 21:03 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
- 40%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 4:26 PM CDT | Severe Thunderstorm Warning | LMK | Spencer | 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
Nashville Metro, TN (KBNA), launched 12:00Z, 9.0 hours before the alert went out and 174 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
- 716 J/kg
- Mixed-layer CIN
- -276 J/kg
- Mixed-layer LCL
- 1509 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 163 m²/s²
- 0-3 km storm-relative helicity
- 177 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 |
|---|---|---|---|---|
| Aug 2, 8:34 PM CDT | Mesoscale Discussion | SPC | DeKalb, Elkhart, Jasper, Kosciusko, LaGrange, Lake and 9 more | 86 min |
| Aug 2, 11:25 PM CDT | Mesoscale Discussion | SPC | Allen, Benton, Carroll, Cass, DeKalb, Elkhart and 16 more | 95 min |
| Aug 3, 12:48 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, Clinton, Dearborn, Delaware, Fountain and 14 more | 8 hr |
| Aug 3, 3:28 AM CDT | Mesoscale Discussion | SPC | Boyd, Greenup, Lewis | 92 min |
| Aug 3, 7:21 AM CDT | Mesoscale Discussion | SPC | Boyd, Greenup, Lewis | 84 min |
| Aug 3, 9:01 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Anderson, Bath, Bell, Boyle, Breathitt and 47 more | 7 hr |
| Aug 3, 12:26 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Bell, Boyle, Breckinridge and 51 more | 64 min |
| Aug 3, 6:43 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Boyle, Breckinridge and 49 more | 62 min |
Nearby
Severe Thunderstorm Watches in Kentucky, 2011Every severe thunderstorm watch in 2011
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.