Alert archive / Kentucky / Flash Flood Warnings in 2021

Flash Flood Warning 19, NWS Louisville, KY

June 10, 2021Oldham County, Kentucky

NWS Louisville, KY issued this flash flood warning at Jun 10, 2021, 6:31 PM EDT for Oldham 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: Jun 10, 2021, 6:31 PM EDT (22:31 UTC)
Expired: Jun 10, 2021, 9:00 PM EDT
In force: 2 hr
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

County Oldham County, KY

The radar

The Louisville radar (KLVX), 59 km from the middle of the area, began a volume at 22:31 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

Time	Report	Where	Remark
Jun 10, 7:52 PM EDT	FLASH FLOOD	3 Nw Todds Point, KY	DELAYED REPORT: DISPATCH REPORTED WATER OVER ROADWAY AT WEST MOUNT ZION RD.

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, 10.5 hours before the alert went out and 187 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 7 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 712 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 8 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

819 
WGUS53 KLMK 102231
FFWLMK
KYC185-110100-
/O.NEW.KLMK.FF.W.0019.210610T2231Z-210611T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Louisville KY
631 PM EDT Thu Jun 10 2021

The National Weather Service in Louisville has issued a

* Flash Flood Warning for...
  Southeastern Oldham County in central Kentucky...

* Until 900 PM EDT.

* At 631 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 0.5 to 1 inch are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  La Grange, Crestwood, Orchard Grass Hills, Pewee Valley, 
  Centerfield, Ballardsville, Buckner, Floydsburg, Park Lake and 
  Liro.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

Please report flooding to your local law enforcement agency when you 
can do so safely and have them relay your report to the National 
Weather Service in Louisville.

&&

LAT...LON 3832 8553 3836 8549 3841 8533 3836 8528
      3830 8535 3831 8539 3830 8541 3829 8541
      3830 8542 3830 8543 3829 8543 3830 8544
      3830 8545 3828 8546

FLASH FLOOD...RADAR INDICATED

$$

MJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 10:32 PM EDT	Areal Flood Advisory	LMK	Madison	3 hr
Jun 10, 3:16 AM EDT	Areal Flood Advisory	LMK	Hardin	4 hr
Jun 10, 3:17 PM EDT	Special Weather Statement	LMK	Fayette	28 min
Jun 10, 5:34 PM EDT	Areal Flood Advisory	LMK	Henry, Shelby	3 hr
Jun 10, 6:23 PM EDT	Areal Flood Advisory	LMK	Jefferson, Oldham, Shelby	3 hr

Nearby

Flash Flood Warnings in Kentucky, 2021 Every 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.