Alert archive / Kentucky / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 277
The Storm Prediction Center issued this severe thunderstorm watch at May 27, 2017, 4:11 PM EDT for 49 counties in Kentucky; 7 counties in Ohio; 32 counties in West Virginia. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 27, 2017, 4:11 PM EDT (20:11 UTC)
- Expired
- May 27, 2017, 10:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 88 counties
Bath County, KY, Bell County, KY, Boone County, KY, Boyd County, KY, Bracken County, KY, Breathitt County, KY, Campbell County, KY, Carroll County, KY, Carter County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Fleming County, KY, Floyd County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Kenton County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lawrence County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Lewis County, KY, Magoffin County, KY, Martin County, KY, Mason County, KY, McCreary County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Owen County, KY, Owsley County, KY, Pendleton County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Pulaski County, KY, Robertson County, KY, Rockcastle County, KY, Rowan County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Adams County, OH, Brown County, OH, Clermont County, OH, Gallia County, OH, Lawrence County, OH, Meigs County, OH, Scioto County, OH, Barbour County, WV, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis 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, Ritchie County, WV, Roane County, WV, Taylor County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV
The radar
The Jackson,KY radar (KJKL), 81 km from the middle of the area, began a volume at 20:11 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
37 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 4:12 PM EDT | Severe Thunderstorm Warning | JKL | Menifee, Montgomery, Morgan, Powell | 48 min |
| May 27, 4:18 PM EDT | Severe Thunderstorm Warning | ILN | Adams, Scioto | 42 min |
| May 27, 4:19 PM EDT | Severe Thunderstorm Warning | JKL | Estill, Lee, Powell, Wolfe | 56 min |
| May 27, 4:22 PM EDT | Flash Flood Warning | JKL | Powell | 3 hr |
| May 27, 4:34 PM EDT | Flash Flood Warning | ILN | Adams | 3 hr |
| May 27, 4:46 PM EDT | Severe Thunderstorm Warning | RLX | Lewis, Upshur | 29 min |
| May 27, 4:51 PM EDT | Severe Thunderstorm Warning | JKL | Lee, Morgan, Wolfe | 24 min |
| May 27, 4:54 PM EDT | Severe Thunderstorm Warning | JKL | Estill, Jackson, Lee | 23 min |
| May 27, 4:56 PM EDT | Severe Thunderstorm Warning | ILN | Lewis | 49 min |
| May 27, 4:59 PM EDT | Flash Flood Warning | ILN | Lewis | 3 hr |
| May 27, 5:00 PM EDT | Severe Thunderstorm Warning | JKL | Breathitt, Lee, Owsley | 30 min |
| May 27, 5:10 PM EDT | Flash Flood Warning | ILN | Lewis | 3 hr |
| May 27, 5:16 PM EDT | Severe Thunderstorm Warning | RLX | Braxton, Lewis, Upshur | 29 min |
| May 27, 5:27 PM EDT | Severe Thunderstorm Warning | JKL | Breathitt, Knott, Magoffin, Morgan, Wolfe | 33 min |
| May 27, 5:34 PM EDT | Severe Thunderstorm Warning | JKL | Laurel, Pulaski, Rockcastle | 26 min |
| May 27, 5:41 PM EDT | Severe Thunderstorm Warning | JKL | Knott, Perry | 34 min |
| May 27, 5:49 PM EDT | Tornado Warning | JKL | Laurel, Pulaski | 26 min |
| May 27, 5:57 PM EDT | Severe Thunderstorm Warning | JKL | Laurel, Pulaski | 33 min |
| May 27, 6:08 PM EDT | Severe Thunderstorm Warning | RLX | Carter | 37 min |
| May 27, 6:10 PM EDT | Severe Thunderstorm Warning | JKL | Knott, Letcher, Perry | 35 min |
| May 27, 6:13 PM EDT | Tornado Warning | ILN | Pike, Scioto | 20 min |
| May 27, 6:28 PM EDT | Severe Thunderstorm Warning | JKL | Elliott | 32 min |
| May 27, 6:29 PM EDT | Severe Thunderstorm Warning | JKL | Knox, Laurel, Whitley | 31 min |
| May 27, 6:44 PM EDT | Severe Thunderstorm Warning | RLX | Carter | 31 min |
| May 27, 6:52 PM EDT | Flash Flood Warning | RLX | Carter | 3 hr |
| May 27, 6:59 PM EDT | Severe Thunderstorm Warning | JKL | Elliott | 31 min |
| May 27, 7:02 PM EDT | Severe Thunderstorm Warning | RLX | Kanawha, Roane | 28 min |
| May 27, 7:04 PM EDT | Flash Flood Warning | JKL | Pulaski | 6 hr |
| May 27, 7:27 PM EDT | Severe Thunderstorm Warning | JKL | Knox, Laurel | 33 min |
| May 27, 7:28 PM EDT | Flash Flood Warning | RLX | Jackson, Mason, Putnam | 3 hr |
| May 27, 7:45 PM EDT | Severe Thunderstorm Warning | JKL | Laurel, Pulaski, Rockcastle | 30 min |
| May 27, 7:47 PM EDT | Severe Thunderstorm Warning | JKL | Bell, Harlan | 28 min |
| May 27, 8:11 PM EDT | Severe Thunderstorm Warning | JKL | Clay, Knox, Laurel | 26 min |
| May 27, 8:36 PM EDT | Flash Flood Warning | JKL | Laurel | 3 hr |
| May 27, 9:05 PM EDT | Flash Flood Warning | JKL | Bell, Harlan | 6 hr |
| May 27, 9:37 PM EDT | Severe Thunderstorm Warning | ILN | Grant, Owen | 13 min |
| May 27, 10:00 PM EDT | Flash Flood Warning | JKL | Bell, Knox, Whitley | 3 hr |
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, 8.2 hours before the alert went out and 177 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
- 794 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 711 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 4:54 AM EDT | Mesoscale Discussion | SPC | Fulton | 2 hr |
| May 27, 5:19 AM EDT | Severe Thunderstorm Watch | SPC | Fulton | 6 hr |
| May 27, 7:12 AM EDT | Mesoscale Discussion | SPC | Fulton | 2 hr |
| May 27, 10:13 AM EDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Bell, Clinton, Cumberland and 12 more | 92 min |
| May 27, 1:50 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 88 more | 85 min |
| May 27, 2:16 PM EDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more | 59 min |
| May 27, 2:36 PM EDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Anderson, Ballard, Barren, Bourbon and 65 more | 7 hr |
| May 27, 4:50 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Ballard, Barren, Boyle and 53 more | 85 min |
| May 27, 6:13 PM EDT | Severe Thunderstorm Watch | SPC | Allen, Ballard, Butler, Caldwell, Calloway, Carlisle and 22 more | 7 hr |
| May 26, 8:09 PM EDT | Severe Thunderstorm Watch | SPC | Butler, Darke, Preble | 3 hr |
| May 26, 10:28 PM EDT | Mesoscale Discussion | SPC | Butler, Darke, Greene, Hamilton, Miami, Montgomery and 2 more | 92 min |
| May 27, 6:11 PM EDT | Mesoscale Discussion | SPC | Mercer, Monroe, Summers | 64 min |
Nearby
Severe Thunderstorm Watches in Kentucky, 2017Severe Thunderstorm Watches in West Virginia, 2017Severe Thunderstorm Watches in Ohio, 2017Every severe thunderstorm watch in 2017
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.