Alert archive / Kentucky / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 534
The Storm Prediction Center issued this severe thunderstorm watch at Jul 27, 2012, 7:11 PM EDT for 24 counties in Kentucky; Gallia County, Jackson County, Lawrence County, Ohio; 5 counties in West Virginia. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 27, 2012, 7:11 PM EDT (23:11 UTC)
- Expired
- Jul 27, 2012, 10:56 PM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 32 counties
Bath County, KY, Boyd County, KY, Breathitt County, KY, Carter County, KY, Elliott County, KY, Estill County, KY, Fleming County, KY, Floyd County, KY, Greenup County, KY, Jackson County, KY, Johnson County, KY, Lawrence County, KY, Lee County, KY, Magoffin County, KY, Martin County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Owsley County, KY, Pike County, KY, Powell County, KY, Rockcastle County, KY, Rowan County, KY, Wolfe County, KY, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Cabell County, WV, Lincoln County, WV, Mason County, WV, Putnam County, WV, Wayne County, WV
The radar
The Jackson,KY radar (KJKL), 79 km from the middle of the area, began a volume at 23:14 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
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 7:23 PM EDT | Severe Thunderstorm Warning | JKL | Bath, Fleming | 52 min |
| Jul 27, 7:49 PM EDT | Severe Thunderstorm Warning | JKL | Bath, Montgomery | 26 min |
| Jul 27, 7:59 PM EDT | Severe Thunderstorm Warning | JKL | Bath, Elliott, Fleming, Menifee, Montgomery, Morgan and 2 more | 46 min |
| Jul 27, 8:13 PM EDT | Severe Thunderstorm Warning | RLX | Boyd, Carter, Greenup, Lawrence | 62 min |
| Jul 27, 8:24 PM EDT | Severe Thunderstorm Warning | JKL | Estill, Lee, Menifee, Montgomery, Powell, Wolfe | 36 min |
| Jul 27, 8:35 PM EDT | Severe Thunderstorm Warning | JKL | Elliott, Johnson, Magoffin, Menifee, Morgan, Wolfe | 40 min |
| Jul 27, 9:04 PM EDT | Severe Thunderstorm Warning | RLX | Boyd, Carter, Greenup, Lawrence | 41 min |
| Jul 27, 9:08 PM EDT | Severe Thunderstorm Warning | JKL | Floyd, Johnson, Magoffin, Martin | 52 min |
| Jul 27, 9:45 PM EDT | Severe Thunderstorm Warning | JKL | Estill, Jackson, Lee | 30 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, 11.2 hours before the alert went out and 141 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
- 863 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 771 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 10 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 |
|---|---|---|---|---|
| Jul 26, 8:55 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Bourbon and 100 more | 65 min |
| Jul 27, 1:52 PM EDT | Mesoscale Discussion | SPC | Ballard, Henderson, Union | 2 hr |
| Jul 27, 2:43 PM EDT | Severe Thunderstorm Watch | SPC | Anderson, Boone, Bourbon, Bracken, Campbell, Carroll and 22 more | 8 hr |
| Jul 27, 5:15 PM EDT | Mesoscale Discussion | SPC | Anderson, Bath, Boone, Bourbon, Boyd, Bracken and 32 more | 90 min |
| Jul 26, 9:06 PM EDT | Mesoscale Discussion | SPC | Berkeley, Hampshire, Hardy, Jefferson, Pendleton | 84 min |
| Jul 27, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | Monroe | 8 hr |
Nearby
Severe Thunderstorm Watches in Kentucky, 2012Severe Thunderstorm Watches in West Virginia, 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.