Alert archive / Kentucky / Flash Flood Warnings in 2021

Flash Flood Warning 9, NWS Jackson, KY

February 28, 202110 counties in Kentucky

NWS Jackson, KY issued this flash flood warning at Feb 28, 2021, 11:15 PM EST for 10 counties in Kentucky. It was in force for 4 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Feb 28, 2021, 11:15 PM EST (04:15 UTC)
Expired
Mar 1, 2021, 3:00 AM EST
In force
4 hr
Issued by
NWS Jackson, KY
Area
Storm-based polygon
Flood severity
None

Counties Clay County, KY, Jackson County, KY, Knox County, KY, Laurel County, KY, McCreary County, KY, Owsley County, KY, Pulaski County, KY, Rockcastle County, KY, Wayne County, KY, Whitley County, KY

The radar

The Knoxville radar (KMRX), 149 km from the middle of the area, began a volume at 04:15 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 was reported inside it

TimeReportWhereRemark
Mar 1, 12:25 AM ESTFLASH FLOOD1 Nne Somerset, KYPICTURE FROM SOCIAL MEDIA SHOWING WATER SURROUNDING AND INUNDATING BUILDINGS IN DOWNTOWN SOMERSET.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.3 hours before the alert went out and 179 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.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2021-03-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 419 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2021-03-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 220 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
419 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
979 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
220 m²/s²
0-3 km storm-relative helicity
278 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.5

Open this sounding in Storm Lab

The text

As transmitted.

606 
WGUS53 KJKL 010415
FFWJKL
KYC051-109-121-125-147-189-199-203-231-235-010800-
/O.NEW.KJKL.FF.W.0009.210301T0415Z-210301T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson KY
1115 PM EST Sun Feb 28 2021

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Laurel County in south central Kentucky...
  McCreary County in south central Kentucky...
  Pulaski County in south central Kentucky...
  Southern Rockcastle County in south central Kentucky...
  Wayne County in south central Kentucky...
  Northern Whitley County in south central Kentucky...
  Western Clay County in southeastern Kentucky...
  Southern Jackson County in southeastern Kentucky...
  Knox County in southeastern Kentucky...
  West Central Owsley County in southeastern Kentucky...

* Until 300 AM EST.

* At 1115 PM EST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Somerset, London, Monticello, Williamsburg, Barbourville, 
  Manchester, Whitley City, Science Hill, Burnside, Huxley, 
  Rockcastle Springs, Baldrock, Mount Victory, Holly Bay Rec. Area, 
  Bark Camp, Dykes, Grove, Vox, Grade and Cumberland Falls S.P.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 3704 8491 3711 8490 3721 8476 3740 8375
      3689 8366 3660 8467 3661 8494 3663 8500
      3665 8500 3667 8501 3668 8500 3670 8502
      3675 8500 3681 8503 3683 8506 3686 8506
      3692 8496 3696 8495 3695 8491 3700 8484

FLASH FLOOD...RADAR INDICATED

$$

GREIF
2 follow-up statements
476 
WGUS73 KJKL 010612
FFSJKL

Flash Flood Statement
National Weather Service Jackson KY
112 AM EST Mon Mar 1 2021

KYC051-109-121-125-147-189-199-203-231-235-010800-
/O.CON.KJKL.FF.W.0009.000000T0000Z-210301T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clay KY-Jackson KY-Knox KY-Laurel KY-McCreary KY-Owsley KY-Pulaski
KY-Rockcastle KY-Wayne KY-Whitley KY-
112 AM EST Mon Mar 1 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 3 AM EST EARLY THIS 
MORNING FOR LAUREL, MCCREARY, PULASKI, SOUTHERN ROCKCASTLE, WAYNE, 
NORTHERN WHITLEY, WESTERN CLAY, SOUTHERN JACKSON, KNOX AND WEST 
CENTRAL OWSLEY COUNTIES...

At 112 AM EST, Doppler radar indicated that the showers were 
weakening over the area, but another quarter to half an inch of rain 
will be possible through 3 am.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Doppler radar.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other
         drainage and low lying areas.

Some locations that will experience flash flooding include...
  Somerset, London, Monticello, Williamsburg, Barbourville, 
  Manchester, Whitley City, Science Hill, Burnside, Huxley, 
  Rockcastle Springs, Baldrock, Mount Victory, Holly Bay Rec. Area, 
  Bark Camp, Dykes, Grove, Vox, Grade and Cumberland Falls S.P.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 3704 8491 3711 8490 3721 8476 3740 8375
      3689 8366 3660 8467 3661 8494 3663 8500
      3665 8500 3667 8501 3668 8500 3670 8502
      3675 8500 3681 8503 3683 8506 3686 8506
      3692 8496 3696 8495 3695 8491 3700 8484

FLASH FLOOD...RADAR INDICATED

$$

GREIF
286 
WGUS73 KJKL 010759 RRA
FFSJKL

Flash Flood Statement
National Weather Service Jackson KY
259 AM EST Mon Mar 1 2021

KYC051-109-121-125-147-189-199-203-231-235-010809-
/O.EXP.KJKL.FF.W.0009.000000T0000Z-210301T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clay KY-Jackson KY-Knox KY-Laurel KY-McCreary KY-Owsley KY-Pulaski
KY-Rockcastle KY-Wayne KY-Whitley KY-
259 AM EST Mon Mar 1 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 3 AM EST EARLY THIS MORNING 
FOR LAUREL, MCCREARY, PULASKI, SOUTHERN ROCKCASTLE, WAYNE, NORTHERN 
WHITLEY, WESTERN CLAY, SOUTHERN JACKSON, KNOX AND WEST CENTRAL 
OWSLEY COUNTIES...

The Flash Flood threat is lessening as the rains start to taper. 
Therefore, the Flash Flood Warning has been replaced by an Areal 
Flood Warning.

LAT...LON 3704 8491 3711 8490 3721 8476 3740 8375
      3689 8366 3660 8467 3661 8494 3663 8500
      3665 8500 3667 8501 3668 8500 3670 8502
      3675 8500 3681 8503 3683 8506 3686 8506
      3692 8496 3696 8495 3695 8491 3700 8484

$$

GREIF

The office that day

Everything else NWS Jackson, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 28, 7:13 PM ESTRiver Flood WarningJKLMagoffin11 hr
Feb 28, 7:18 PM ESTSpecial Weather StatementJKLClay, Leslie, Owsley, Perry57 min
Feb 28, 7:49 PM ESTAreal Flood AdvisoryJKLClay, Floyd, Harlan, Knott, Knox, Laurel and 6 more34 min
Feb 28, 8:14 PM ESTAreal Flood WarningJKLClay, Jackson, Knox, Laurel, McCreary, Owsley and 4 more3 hr
Feb 28, 8:16 PM ESTSpecial Weather StatementJKLKnott, Pike59 min
Feb 28, 8:17 PM ESTRiver Flood WarningJKLBreathitt56 hr
Feb 28, 8:22 PM ESTAreal Flood WarningJKLBell, Clay, Floyd, Harlan, Knott, Knox and 8 more3 hr
Feb 28, 8:22 PM ESTRiver Flood WarningJKLClay29 hr
Feb 28, 9:06 PM ESTRiver Flood WarningJKLJohnson61 hr
Feb 28, 9:11 PM ESTSpecial Weather StatementJKLMcCreary, Pulaski, Wayne49 min
Feb 28, 9:20 PM ESTSevere Thunderstorm WarningJKLMcCreary, Pulaski, Wayne25 min
Feb 28, 9:30 PM ESTSpecial Weather StatementJKLLeslie45 min
Feb 28, 9:55 PM ESTSpecial Weather StatementJKLKnox, Laurel, McCreary, Whitley35 min
Feb 28, 10:02 PM ESTAreal Flood WarningJKLEstill, Jackson, Johnson, Lee, Magoffin, Menifee and 4 more9 hr
Feb 28, 10:18 PM ESTFlash Flood WarningJKLBreathitt, Estill, Floyd, Jackson, Johnson, Lee and 7 more4 hr
Feb 28, 10:38 PM ESTSpecial Weather StatementJKLBell, Clay, Knox, Leslie52 min
Feb 28, 10:56 PM ESTAreal Flood AdvisoryJKLBell, Clay, Harlan, Knox, Leslie, Letcher and 2 more4 hr
Feb 28, 11:18 PM ESTFlash Flood WarningJKLBell, Clay, Floyd, Harlan, Knott, Knox and 8 more4 hr
Feb 28, 11:28 PM ESTSpecial Weather StatementJKLHarlan32 min
Mar 1, 2:33 AM ESTAreal Flood WarningJKLBreathitt, Estill, Floyd, Jackson, Johnson, Lee and 7 more15 hr
Mar 1, 2:38 AM ESTAreal Flood WarningJKLBreathitt, Estill, Jackson, Laurel, Lee, Magoffin and 5 more13 hr
Mar 1, 2:43 AM ESTAreal Flood WarningJKLFloyd, Johnson, Magoffin, Martin, Morgan, Pike13 hr
Mar 1, 2:48 AM ESTAreal Flood WarningJKLBreathitt, Floyd, Jackson, Knott, Magoffin, Owsley and 1 more13 hr
Mar 1, 2:52 AM ESTAreal Flood WarningJKLBreathitt, Clay, Floyd, Jackson, Knott, Leslie and 4 more13 hr
Mar 1, 2:58 AM ESTAreal Flood WarningJKLBell, Clay, Floyd, Harlan, Jackson, Knott and 12 more13 hr
Mar 1, 3:02 AM ESTAreal Flood AdvisoryJKLBell, Clay, Harlan, Knox, Leslie, Letcher and 4 more7 hr
Mar 1, 4:14 AM ESTRiver Flood WarningJKLPerry18 hr
Mar 1, 4:14 AM ESTRiver Flood AdvisoryJKLLetcher3 hr
Mar 1, 5:55 AM ESTRiver Flood AdvisoryJKLPike31 hr
Mar 1, 6:10 AM ESTRiver Flood WarningJKLPike17 hr
Mar 1, 6:50 AM ESTRiver Flood WarningJKLLetcher74 min
Mar 1, 8:08 AM ESTRiver Flood AdvisoryJKLLetcher6 hr
Mar 1, 8:18 AM ESTRiver Flood AdvisoryJKLHarlan12 hr
Mar 1, 8:38 AM ESTRiver Flood WarningJKLMagoffin17 hr
Mar 1, 10:05 AM ESTRiver Flood WarningJKLBell12 hr
Mar 1, 2:00 PM ESTAreal Flood WarningJKLMorgan3 hr
Mar 1, 3:38 PM ESTAreal Flood WarningJKLMagoffin, Morgan, Rowan44 hr
Mar 1, 3:59 PM ESTAreal Flood WarningJKLMartin, Pike25 hr
Mar 1, 4:03 PM ESTAreal Flood WarningJKLLeslie, Perry14 days
Mar 1, 5:42 PM ESTAreal Flood WarningJKLBreathitt9 hr

Nearby

Flash Flood Warnings in Kentucky, 2021Every flash flood warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.