Alert archive / Kentucky / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 633
The Storm Prediction Center issued this severe thunderstorm watch at Sep 7, 2012, 8:10 PM CDT for 6 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 7, 2012, 8:10 PM CDT (01:10 UTC)
- Expired
- Sep 8, 2012, 2:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 165 counties
Lee County, AR, Phillips County, AR, Clark County, IN, Crawford County, IN, Dearborn County, IN, Dubois County, IN, Fayette County, IN, Floyd County, IN, Franklin County, IN, Harrison County, IN, Jefferson County, IN, Ohio County, IN, Orange County, IN, Perry County, IN, Ripley County, IN, Scott County, IN, Switzerland County, IN, Union County, IN, Washington County, IN, Wayne County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Boone County, KY, Bourbon County, KY, Boyle County, KY, Bracken County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Campbell County, KY, Carroll County, KY, Casey County, KY, Clark County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Fayette County, KY, Franklin County, KY, Gallatin County, KY, Garrard County, KY, Grant County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Harrison County, KY, Hart County, KY, Henry County, KY, Jefferson County, KY, Jessamine County, KY, Kenton County, KY, Larue County, KY, Lewis County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Marion County, KY, Mason County, KY, Meade County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Nelson County, KY, Nicholas County, KY, Ohio County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Trimble County, KY, Warren County, KY, Washington County, KY, Woodford County, KY, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Coahoma County, MS, DeSoto County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS, Adams County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Miami County, OH, Montgomery County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Scioto County, OH, Shelby County, OH, Union County, OH, Warren County, OH, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Davidson County, TN, Decatur County, TN, Dickson County, TN, Fayette County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Wayne County, TN, Williamson County, TN, Wilson County, TN
The radar
The Louisville radar (KLVX), 41 km from the middle of the area, began a volume at 01:13 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
- 90%
- One or more gusts of 65 knots or more
- 50%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
34 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 8:50 PM CDT | Severe Thunderstorm Warning | LMK | Orange, Washington | 45 min |
| Sep 7, 9:09 PM CDT | Severe Thunderstorm Warning | ILN | Fayette, Franklin, Ripley | 51 min |
| Sep 7, 9:13 PM CDT | Severe Thunderstorm Warning | LMK | Dubois, Orange | 32 min |
| Sep 7, 9:34 PM CDT | Severe Thunderstorm Warning | MEG | DeSoto, Marshall | 41 min |
| Sep 7, 9:36 PM CDT | Severe Thunderstorm Warning | LMK | Perry | 29 min |
| Sep 7, 9:40 PM CDT | Severe Thunderstorm Warning | LMK | Clark, Crawford, Dubois, Harrison, Orange, Perry and 2 more | 40 min |
| Sep 7, 9:50 PM CDT | Severe Thunderstorm Warning | ILN | Wayne | 25 min |
| Sep 7, 9:52 PM CDT | Severe Thunderstorm Warning | LMK | Perry | 43 min |
| Sep 7, 10:00 PM CDT | Severe Thunderstorm Warning | LMK | Crawford, Harrison, Perry | 40 min |
| Sep 7, 10:06 PM CDT | Severe Thunderstorm Warning | LMK | Clark, Floyd, Harrison, Washington | 29 min |
| Sep 7, 10:06 PM CDT | Severe Thunderstorm Warning | MEG | Carroll, Crockett, Gibson, Haywood, Henderson, Henry and 3 more | 24 min |
| Sep 7, 10:10 PM CDT | Severe Thunderstorm Warning | LMK | Jefferson, Scott | 40 min |
| Sep 7, 10:24 PM CDT | Severe Thunderstorm Warning | LMK | Clark, Floyd, Harrison | 46 min |
| Sep 7, 10:26 PM CDT | Severe Thunderstorm Warning | LMK | Harrison | 29 min |
| Sep 7, 10:32 PM CDT | Severe Thunderstorm Warning | OHX | Benton, Houston, Humphreys, Montgomery, Stewart | 58 min |
| Sep 7, 10:45 PM CDT | Severe Thunderstorm Warning | ILN | Ohio, Switzerland | 45 min |
| Sep 7, 10:52 PM CDT | Severe Thunderstorm Warning | LMK | Bullitt, Hardin, Jefferson, Meade | 28 min |
| Sep 7, 11:11 PM CDT | Severe Thunderstorm Warning | ILN | Greene, Montgomery | 34 min |
| Sep 7, 11:22 PM CDT | Severe Thunderstorm Warning | ILN | Switzerland | 38 min |
| Sep 7, 11:24 PM CDT | Severe Thunderstorm Warning | OHX | Montgomery, Stewart | 51 min |
| Sep 7, 11:30 PM CDT | Tornado Warning | ILN | Boone, Gallatin, Grant, Pendleton | 20 min |
| Sep 7, 11:43 PM CDT | Severe Thunderstorm Warning | ILN | Brown, Clermont, Clinton, Highland, Warren | 32 min |
| Sep 7, 11:57 PM CDT | Severe Thunderstorm Warning | ILN | Bracken, Campbell, Grant, Kenton, Mason, Owen and 2 more | 48 min |
| Sep 7, 11:58 PM CDT | Severe Thunderstorm Warning | ILN | Champaign, Clark, Greene, Madison, Union | 32 min |
| Sep 8, 12:01 AM CDT | Severe Thunderstorm Warning | OHX | Dickson, Hickman, Houston, Humphreys, Perry | 29 min |
| Sep 8, 12:04 AM CDT | Tornado Warning | ILN | Bracken, Pendleton | 16 min |
| Sep 8, 12:15 AM CDT | Severe Thunderstorm Warning | ILN | Adams, Clinton, Fayette, Highland, Pike, Ross | 45 min |
| Sep 8, 12:19 AM CDT | Severe Thunderstorm Warning | ILN | Madison, Union | 26 min |
| Sep 8, 12:23 AM CDT | Severe Thunderstorm Warning | LMK | Logan | 32 min |
| Sep 8, 12:28 AM CDT | Severe Thunderstorm Warning | OHX | Cheatham, Davidson, Dickson, Hickman, Williamson | 32 min |
| Sep 8, 12:30 AM CDT | Severe Thunderstorm Warning | ILN | Bracken, Lewis, Mason, Robertson | 45 min |
| Sep 8, 1:05 AM CDT | Severe Thunderstorm Warning | ILN | Lewis, Mason | 40 min |
| Sep 8, 1:06 AM CDT | Severe Thunderstorm Warning | ILN | Fairfield, Franklin, Licking | 24 min |
| Sep 8, 1:23 AM CDT | Tornado Warning | ILN | Delaware, Licking | 37 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 00:00Z, 1.2 hours before the alert went out and 185 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
- 2335 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1287 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 44 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 |
|---|---|---|---|---|
| Sep 7, 11:36 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Lauderdale, Lawrence, Limestone, Morgan | 84 min |
| Sep 8, 1:03 PM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bullock, Butler, Chambers, Coffee and 19 more | 117 min |
| Sep 7, 8:24 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Crittenden, Cross, Faulkner, Garland and 16 more | 96 min |
| Sep 7, 7:39 PM CDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Clay, Crawford, Daviess and 43 more | 66 min |
| Sep 7, 11:57 PM CDT | Mesoscale Discussion | SPC | Anderson, Bath, Bourbon, Boyd, Bracken, Breathitt and 39 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Kentucky, 2012Severe Thunderstorm Watches in Tennessee, 2012Severe Thunderstorm Watches in Ohio, 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.