Alert archive / Kentucky / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 245
The Storm Prediction Center issued this severe thunderstorm watch at May 5, 2012, 2:49 AM CDT for 4 counties in Indiana; 32 counties in Kentucky; 13 counties in Tennessee. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 5, 2012, 2:49 AM CDT (07:49 UTC)
- Expired
- May 5, 2012, 6:58 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 49 counties
Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Adair County, KY, Allen County, KY, Barren County, KY, Breckinridge County, KY, Butler County, KY, Caldwell County, KY, Christian County, KY, Clinton County, KY, Crittenden County, KY, Cumberland County, KY, Daviess County, KY, Edmonson County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Henderson County, KY, Hopkins County, KY, Larue County, KY, Logan County, KY, McLean County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Ohio County, KY, Russell County, KY, Simpson County, KY, Todd County, KY, Union County, KY, Warren County, KY, Webster County, KY, Clay County, TN, Fentress County, TN, Jackson County, TN, Macon County, TN, Montgomery County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Wilson County, TN
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 2:56 AM CDT | Tornado Warning | LMK | Grayson | 19 min |
| May 5, 3:14 AM CDT | Severe Thunderstorm Warning | LMK | Barren, Edmonson, Grayson, Hart | 31 min |
| May 5, 3:44 AM CDT | Severe Thunderstorm Warning | LMK | Adair, Barren, Green, Hart, Metcalfe | 31 min |
| May 5, 3:53 AM CDT | Tornado Warning | LMK | Barren, Metcalfe | 22 min |
| May 5, 4:39 AM CDT | Tornado Warning | OHX | Clay, Overton, Pickett | 36 min |
| May 5, 5:12 AM CDT | Severe Thunderstorm Warning | OHX | Fentress | 33 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, 7.8 hours before the alert went out and 148 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
- 1078 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1542 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 111 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 7:57 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Christian, Clay, Clinton, Crawford and 25 more | 63 min |
| May 4, 10:18 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Clinton, Franklin, Greene, Hamilton and 11 more | 87 min |
| May 4, 10:35 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Clinton, Edwards, Fayette, Franklin and 24 more | 8 hr |
| May 5, 12:55 AM CDT | Mesoscale Discussion | SPC | Edwards, Gallatin, Hamilton, Hardin, Saline, Wabash and 1 more | 95 min |
| May 5, 5:06 AM CDT | Mesoscale Discussion | SPC | Gallatin, Hardin, White | 114 min |
Nearby
Severe Thunderstorm Watches in Kentucky, 2012Severe Thunderstorm Watches in Tennessee, 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.