Alert archive / Kentucky / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 509
The Storm Prediction Center issued this severe thunderstorm watch at Jul 24, 2012, 11:33 AM CDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 24, 2012, 11:33 AM CDT (16:33 UTC)
- Expired
- Jul 24, 2012, 6:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 97 counties
Adair County, KY, Anderson County, KY, Bath County, KY, Bell County, KY, Bourbon County, KY, Boyd County, KY, Boyle County, KY, Breathitt County, KY, Bullitt County, KY, Carter County, KY, Casey County, KY, Clark County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Floyd County, KY, Franklin County, KY, Garrard County, KY, Green County, KY, Greenup County, KY, Harlan County, KY, Harrison County, KY, Henry County, KY, Jackson County, KY, Jefferson County, KY, Jessamine County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Larue County, KY, Laurel County, KY, Lawrence County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Lincoln County, KY, Madison County, KY, Magoffin County, KY, Marion County, KY, Martin County, KY, McCreary County, KY, Menifee County, KY, Mercer County, KY, Montgomery County, KY, Morgan County, KY, Nelson County, KY, Nicholas County, KY, Oldham County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Rowan County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Taylor County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Woodford County, KY, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Buchanan County, VA, City of Bristol, VA, City of Norton, VA, Dickenson County, VA, Lee County, VA, Russell County, VA, Scott County, VA, Washington County, VA, Wise County, VA, Boone County, WV, Cabell County, WV, Clay County, WV, Fayette County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mingo County, WV, Nicholas County, WV, Pocahontas County, WV, Putnam County, WV, Raleigh County, WV, Randolph County, WV, Wayne County, WV, Webster County, WV, Wyoming County, WV
The radar
The Jackson,KY radar (KJKL), 42 km from the middle of the area, began a volume at 16:33 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
- 80%
- One or more gusts of 65 knots or more
- 50%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 11:53 AM CDT | Severe Thunderstorm Warning | JKL | Bath, Fleming, Rowan | 37 min |
| Jul 24, 12:10 PM CDT | Severe Thunderstorm Warning | JKL | Elliott, Johnson, Morgan, Rowan | 35 min |
| Jul 24, 12:27 PM CDT | Severe Thunderstorm Warning | RLX | Jackson, Kanawha, Mason, Putnam, Roane | 33 min |
| Jul 24, 12:30 PM CDT | Severe Thunderstorm Warning | JKL | Elliott, Fleming, Morgan, Rowan | 16 min |
| Jul 24, 1:03 PM CDT | Severe Thunderstorm Warning | JKL | Bath, Menifee, Montgomery, Morgan, Rowan | 27 min |
| Jul 24, 1:51 PM CDT | Severe Thunderstorm Warning | RLX | Fayette, Raleigh | 24 min |
| Jul 24, 2:32 PM CDT | Severe Thunderstorm Warning | JKL | Harlan, Knott, Leslie, Letcher, Perry, Pike | 58 min |
| Jul 24, 2:38 PM CDT | Severe Thunderstorm Warning | MRX | Lee, Scott, Wise, City of Norton | 52 min |
| Jul 24, 3:21 PM CDT | Severe Thunderstorm Warning | LMK | Boyle, Casey, Marion | 29 min |
| Jul 24, 3:31 PM CDT | Severe Thunderstorm Warning | MRX | Scott, Washington | 29 min |
| Jul 24, 4:02 PM CDT | Severe Thunderstorm Warning | LMK | Larue, Marion, Nelson | 33 min |
| Jul 24, 4:16 PM CDT | Flash Flood Warning | LMK | Larue, Marion, Nelson | 62 min |
| Jul 24, 4:27 PM CDT | Severe Thunderstorm Warning | JKL | Pulaski, Rockcastle | 63 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, 4.6 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
- 1858 J/kg
- Mixed-layer CIN
- -130 J/kg
- Mixed-layer LCL
- 1124 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 187 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 1.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 9:35 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Bracken, Campbell, Kenton, Lewis, Mason and 2 more | 3 hr |
| Jul 24, 10:43 AM CDT | Mesoscale Discussion | SPC | Bath, Bourbon, Boyd, Breathitt, Carter, Clark and 26 more | 62 min |
| Jul 24, 10:59 AM CDT | Mesoscale Discussion | SPC | Boone, Bracken, Campbell, Greenup, Kenton, Lewis and 3 more | 61 min |
| Jul 24, 12:52 PM CDT | Mesoscale Discussion | SPC | Anderson, Bath, Bourbon, Boyd, Boyle, Breathitt and 47 more | 53 min |
| Jul 24, 2:25 PM CDT | Mesoscale Discussion | SPC | Adair, Anderson, Bell, Bourbon, Boyle, Breathitt and 44 more | 95 min |
| Jul 24, 3:25 PM CDT | Mesoscale Discussion | SPC | Breckinridge, Butler, Caldwell, Christian, Crittenden, Daviess and 17 more | 95 min |
| Jul 24, 5:20 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Barren, Bell, Breckinridge, Butler and 26 more | 4 hr |
| Jul 24, 9:08 AM CDT | Mesoscale Discussion | SPC | Auglaize, Butler, Champaign, Clark, Clinton, Darke and 14 more | 97 min |
| Jul 24, 10:48 AM CDT | Mesoscale Discussion | SPC | Belmont, Carroll, Columbiana, Harrison, Jefferson, Stark | 87 min |
| Jul 24, 12:08 PM CDT | Severe Thunderstorm Watch | SPC | Albemarle, Alleghany, Amelia, Amherst, Appomattox, Arlington and 89 more | 6 hr |
| Jul 24, 12:42 PM CDT | Mesoscale Discussion | SPC | Accomack, Amelia, Brunswick, Caroline, Charles City, Charlotte and 48 more | 2 hr |
| Jul 24, 2:46 PM CDT | Mesoscale Discussion | SPC | Accomack, Brunswick, Charles City, Dinwiddie, Gloucester, Greensville and 28 more | 89 min |
| Jul 24, 3:24 PM CDT | Severe Thunderstorm Watch | SPC | Accomack, Brunswick, Dinwiddie, Gloucester, Greensville, Isle of Wight and 20 more | 4 hr |
Nearby
Severe Thunderstorm Watches in Kentucky, 2012Severe Thunderstorm Watches in West Virginia, 2012Severe Thunderstorm Watches in Virginia, 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.