A band of showers and thunderstorms moved into southern Kentucky during the early evening hours, with a few heavier storms developing within the band. One of these moved slowly over Woodbine, south of Corbin, producing nearly 2 inches of rain.
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The episode as NWS JKL wrote it up.
A band of showers and thunderstorms moved into southern Kentucky during the early evening hours, with a few heavier storms developing within the band. One of these moved slowly over Woodbine, south of Corbin, producing nearly 2 inches of rain. This resulted in localized flash flooding.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Jackson, KY wrote its last area forecast discussion before the first event at Apr 21, 5:30 PM EST, 30 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED National Weather Service Jackson KY 630 PM EDT Fri Apr 21 2017 .UPDATE... Issued at 630 PM EDT FRI APR 21 2017 Convection is currently aligned along the Cumberland Valley, close to the surface boundary near the TN/KY border. Some of the embedded thunderstorms are slow-moving, and will have to watch for locally heavy rainfall in places. Further west, an area of showers and storms are moving in from the southwest, associated with a short wave trough in the mid-levels. The HRRR seems to have a decent handle on this feature and its timing. As such, have beefed up the POPs a bit into this evening from southwest to northeast. A lot of the thunderstorms will likely remain confined to along and south of Highway 80 and the Hal Rogers Parkway, where better instability will remain. Updates have been sent. && .SHORT TERM...(This evening through Saturday night) Issued at 311 PM EDT FRI APR 21 2017 Slow moving frontal boundary lies across Southeast Kentucky, through Tennessee to Northern Mississippi. Showers and a few thunderstorms are showing a diminishing trend early this afternoon as a short wave travels east. This drier trend should be short lived as more ripples of short wave energy interact with moisture along the boundary. Locations in the southern portion of the area should see widespread showers and thunderstorms by this evening. Locations farther to the north should experience widespread precip by around midnight when the front will be lifting northward in response to a potent wave of low pressure to the southwest. Thunder chances are expected to be limited to the early evening hours until instability wanes with loss of daytime heating. For Saturday, the front should be located near the TN/KY border. 1005 mb low pressure is expected to be tracking through TN. Numerous to widespread showers and thunderstorms are forecast to develop and persist through the day and into Saturday night. High precipitable water lifting over the slow moving frontal surface parallel to the mid level flow will result in a few rounds of heavy rain, possibly leading to localized high water problems. Elected to hold off on a flood watch due to model uncertainty with respect to rainfall amounts and locations of heaviest amounts. Rainfall should decrease in coverage and intensity over western counties late Saturday night when the low is forecast to be over East Tennessee, though far Eastern Kentucky could stay under showers for the bulk of the period. While all locations can expect below normal temperatures, highs Saturday will vary with respect to the frontal position, with upper 60s in the far south contrasting with upper 50s central and lower 50 far north. .LONG TERM...(Sunday through Friday) Issued at 305 PM EDT FRI APR 21 2017 An upper level low will drop southeast across the Tennessee Valley and across the southeastern United States Sunday into Monday. This will keep a lingering chance of showers across the area through much of the day on Sunday before tapering off heading into Sunday night. Highs on Sunday will generally be in the lower 60s. Weak high pressure will then build into the area Monday into Tuesday leading to dry conditions and a bit of a warming trend. Highs on Monday will be in the upper 60s to around 70, increasing to the mid 70s for Tuesday. An upper level trough axis will weaken as it moves from the central United States into the the Great Lakes region Wednesday through Thursday. This will help a weakening cold front drop down toward the area through mid week but there is quite a bit of model variation with the timing and placement of the front. Will therefore just allow for some lower chance pops to overspread the area Wednesday afternoon into Wednesday night. Highs on Wednesday will warm into the lower 80s across most of the area. Mid and upper level ridging will then build into the area Thursday into Friday. This will lead to dry conditions and unseasonably warm temperatures with highs both days in the mid 80s. && .AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon) ISSUED AT 305 PM EDT FRI APR 21 2017 Less than ideal conditions for aviation will result from a slow moving frontal boundary and potent wave of low pressure, interacting in an environment containing much above normal moisture. For the early part of the TAF period, MVFR conditions associated with shower and thunderstorm activity will affect mainly southern sites that are closer to the current position of the front. MVFR should impact all sites by late tonight when a large swath of precipitation is forecast to develop ahead of the advancing wave of low pressure. Showers and thunderstorms should then persist on Saturday as moisture and forcing linger around this slow moving weather system. Kept ceilings in the MVFR range, but IFR may be necessary if the boundary layer achieves saturation. Winds are forecast to be from the north to northeast, with speeds staying under 10 knots. && .JKL WATCHES/WARNINGS/ADVISORIES... NONE. && UPDATE...Geogerian SHORT TERM...Coniglio LONG TERM...Lott AVIATION...Coniglio
Hazardous Weather Outlook National Weather Service Jackson KY 544 PM EDT Fri Apr 21 2017 KYZ044-050>052-059-060-104-106>109-119-221100- Fleming-Montgomery-Bath-Rowan-Powell-Menifee-Elliott-Morgan- Johnson-Wolfe-Magoffin-Martin- Including the cities of Flemingsburg, Camargo, Jeffersonville, Mount Sterling, Owingsville, Morehead, Clay City, Stanton, Frenchburg, Sandy Hook, West Liberty, Paintsville, Campton, Salyersville, and Inez 544 PM EDT Fri Apr 21 2017 This hazardous weather outlook is for portions of eastern Kentucky. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Periods of showers will affect the area from Saturday into Sunday. Locally heavy rainfall will be possible, which may result in minor flooding of low lying areas. Thunderstorms will be possible Wednesday afternoon and Wednesday night. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. KYZ058-068-069-079-080-083>088-110>118-120-221100- Estill-Rockcastle-Jackson-Pulaski-Laurel-Wayne-McCreary-Whitley- Knox-Bell-Harlan-Floyd-Lee-Breathitt-Knott-Owsley-Perry-Clay- Leslie-Letcher-Pike- Including the cities of Irvine, Ravenna, Brodhead, Mount Vernon, McKee, Annville, Burnside, Somerset, London, Monticello, Stearns, Whitley City, Corbin, Williamsburg, Barbourville, Middlesboro, Pineville, Cumberland, Harlan, Prestonsburg, Wheelwright, Beattyville, Jackson, Hindman, Pippa Passes, Booneville, Hazard, Manchester, Hyden, Jenkins, Whitesburg, Coal Run, Elkhorn City, Pikeville, and South Williamson 544 PM EDT Fri Apr 21 2017 This hazardous weather outlook is for portions of eastern Kentucky. .DAY ONE...Tonight. Thunderstorms will be possible tonight, mainly along and south of Highway 80 and the Hal Rogers Parkway. Locally heavy rainfall will be possible in slow-moving storms, with minor flooding possible in low lying areas. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Thunderstorms will be possible Saturday and Saturday evening. Locally heavy rainfall will be possible, bringing an increased threat of minor flooding in low lying areas. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. GEOGERIAN
Special Weather Statement
National Weather Service JACKSON KY
608 PM EDT FRI APR 21 2017
KYZ084-085-212300-
Whitley-McCreary-
608 PM EDT FRI APR 21 2017
...A STRONG THUNDERSTORM WILL AFFECT MCCREARY AND NORTHWESTERN
WHITLEY COUNTIES...
At 608 PM EDT, a strong thunderstorm was located near Blue Heron, or
7 miles south of Whitley City, moving northeast at 20 mph.
Winds in excess of 30 mph and half inch hail are possible with this
storm.
Locations impacted include...
Williamsburg, Whitley City, Parkers Lake, Cumberland Falls S.P.,
Clio, Goldbug, Pine Knot, Krupp, Hollyhill, Wofford, Youngs Creek,
Wiborg, Blue Heron, Honeybee, Marshes Siding, Duckrun, Beulah
Heights, Redbird, Stearns and Walden.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 3660 8462 3663 8466 3695 8439 3682 8407
3659 8437
TIME...MOT...LOC 2208Z 224DEG 16KT 3662 8452
SHALLENBERGERThe Knoxville radar (KMRX), 103 km away, was scanning. The volume nearest the first event began at 23:01 UTC.
1 flash flood. Local standard time, as filed.
A trained spotter observed water flowing over Eaton Town School Road near Woodbine, south of Corbin.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kentucky in 2017Every state in 2017This day in weather historyWarnings in Kentucky, April 2017
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 681252.