Alert archive / Kentucky / Flash Flood Warnings in 2021

Flash Flood Warning 42, NWS Jackson, KY

July 10, 2021Floyd County, Johnson County, Martin County, Kentucky

NWS Jackson, KY issued this flash flood warning at Jul 10, 2021, 3:19 PM EDT for Floyd County, Johnson County, Martin County, Kentucky. It was in force for 2 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
Jul 10, 2021, 3:19 PM EDT (19:19 UTC)
Expired
Jul 10, 2021, 5:38 PM EDT
In force
2 hr
Issued by
NWS Jackson, KY
Area
Storm-based polygon
Flood severity
None

Counties Floyd County, KY, Johnson County, KY, Martin County, KY

The radar

The Jackson,KY radar (KJKL), 49 km from the middle of the area, began a volume at 19:19 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
Jul 10, 4:00 PM EDTFLASH FLOODAllen, KYFLASH FLOODING WAS OBSERVED ALONG KY1428 IN THE CITY OF ALLEN. ONE LANE OF THE ROAD WAS IMPASSABLE.

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

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 7.3 hours before the alert went out and 216 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, Cncnati-Daytn, OH at 12:00Z on 2021-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Cncnati-Daytn, OH at 12:00Z on 2021-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
866 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

599 
WGUS53 KJKL 101919
FFWJKL
KYC071-115-159-102145-
/O.NEW.KJKL.FF.W.0042.210710T1919Z-210710T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson KY
319 PM EDT Sat Jul 10 2021

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Southeastern Johnson County in northeastern Kentucky...
  Southwestern Martin County in northeastern Kentucky...
  Northern Floyd County in southeastern Kentucky...

* Until 545 PM EDT.

* At 319 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. 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...
  Prestonsburg, Allen, Lancer, Cliff, Bays Branch, Corn Fork Hollow, 
  Auxier, Dwale, Emma, Beaver Junction, Alvin, Dock, Nero, Allen 
  City, East Point, Oaklawn Estates, Van Lear, Bammer and Odds.

Additional rainfall amounts of 0.5 to 1 inch are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 3770 8294 3777 8276 3776 8259 3768 8258
      3767 8261 3765 8261 3765 8260 3764 8260
      3760 8269 3758 8279 3760 8290 3764 8290
      3764 8291 3765 8291 3765 8293

FLASH FLOOD...RADAR INDICATED

$$

GREIF
1 follow-up statement
079 
WGUS73 KJKL 102138
FFSJKL

Flash Flood Statement
National Weather Service Jackson KY
538 PM EDT Sat Jul 10 2021

KYC071-115-159-102148-
/O.CAN.KJKL.FF.W.0042.000000T0000Z-210710T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Floyd KY-Johnson KY-Martin KY-
538 PM EDT Sat Jul 10 2021

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN JOHNSON, 
SOUTHWESTERN MARTIN AND NORTHERN FLOYD COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3770 8294 3777 8276 3776 8259 3768 8258
      3767 8261 3765 8261 3765 8260 3764 8260
      3760 8269 3758 8279 3760 8290 3764 8290
      3764 8291 3765 8291 3765 8293

$$

GREIF

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 12:11 PM EDTSpecial Weather StatementJKLElliott34 min
Jul 10, 1:13 PM EDTSpecial Weather StatementJKLWhitley47 min
Jul 10, 1:45 PM EDTSpecial Weather StatementJKLBell, Knox, Whitley45 min
Jul 10, 2:34 PM EDTSpecial Weather StatementJKLBell, Clay, Harlan, Leslie41 min
Jul 10, 2:36 PM EDTSpecial Weather StatementJKLJohnson39 min
Jul 10, 3:07 PM EDTSpecial Weather StatementJKLFloyd, Pike38 min
Jul 10, 3:08 PM EDTSevere Thunderstorm WarningJKLFloyd, Martin, Pike52 min
Jul 10, 3:13 PM EDTAreal Flood AdvisoryJKLFloyd, Magoffin, Martin, Pike3 hr
Jul 10, 3:30 PM EDTSpecial Weather StatementJKLLaurel60 min
Jul 10, 3:32 PM EDTSpecial Weather StatementJKLPike28 min
Jul 10, 3:33 PM EDTSpecial Weather StatementJKLEstill, Lee, Powell42 min
Jul 10, 3:45 PM EDTAreal Flood AdvisoryJKLEstill3 hr
Jul 10, 3:49 PM EDTFlash Flood WarningJKLEstill2 hr
Jul 10, 3:56 PM EDTSpecial Weather StatementJKLMorgan49 min
Jul 10, 3:58 PM EDTSpecial Weather StatementJKLMagoffin, Wolfe47 min
Jul 10, 3:59 PM EDTSpecial Weather StatementJKLPike31 min
Jul 10, 4:03 PM EDTSevere Thunderstorm WarningJKLMagoffin, Morgan42 min
Jul 10, 4:11 PM EDTAreal Flood AdvisoryJKLPike3 hr
Jul 10, 4:13 PM EDTAreal Flood AdvisoryJKLEstill, Lee, Powell, Wolfe3 hr
Jul 10, 4:18 PM EDTSpecial Weather StatementJKLLee27 min
Jul 10, 4:42 PM EDTAreal Flood AdvisoryJKLPike3 hr
Jul 10, 4:44 PM EDTAreal Flood AdvisoryJKLBreathitt, Lee, Wolfe2 hr
Jul 10, 5:09 PM EDTSpecial Weather StatementJKLPulaski36 min
Jul 10, 5:41 PM EDTSpecial Weather StatementJKLLaurel49 min
Jul 10, 6:02 PM EDTSpecial Weather StatementJKLLaurel43 min
Jul 10, 6:16 PM EDTAreal Flood AdvisoryJKLMcCreary, Pulaski105 min
Jul 10, 6:16 PM EDTAreal Flood AdvisoryJKLPike52 min
Jul 10, 6:24 PM EDTFlash Flood WarningJKLPulaski95 min
Jul 10, 6:31 PM EDTAreal Flood AdvisoryJKLMcCreary115 min
Jul 10, 6:40 PM EDTFlash Flood WarningJKLMcCreary103 min
Jul 10, 6:49 PM EDTAreal Flood AdvisoryJKLLaurel, McCreary, Whitley102 min
Jul 10, 7:14 PM EDTAreal Flood AdvisoryJKLClay3 hr
Jul 10, 7:40 PM EDTAreal Flood AdvisoryJKLKnox2 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.