Alert archive / Kentucky / Flash Flood Warnings in 2021

Flash Flood Warning 48, NWS Louisville, KY

August 30, 2021Harrison County, Scott County, Kentucky

NWS Louisville, KY issued this flash flood warning at Aug 30, 2021, 12:53 PM EDT for Harrison County, Scott County, Kentucky. It was in force for 3 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: Aug 30, 2021, 12:53 PM EDT (16:53 UTC)
Expired: Aug 30, 2021, 4:00 PM EDT
In force: 3 hr
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

Counties Harrison County, KY, Scott County, KY

The radar

The Louisville radar (KLVX), 129 km from the middle of the area, began a volume at 16:52 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
Aug 30, 2:30 PM EDT	FLASH FLOOD	2 Sse Sadieville, KY	MINOR FLOODING IN NORTHERN SCOTT COUNTY. NO ROAD CLOSURES.

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, 4.9 hours before the alert went out and 138 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: 185 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 1095 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

414 
WGUS53 KLMK 301653
FFWLMK
KYC097-209-302000-
/O.NEW.KLMK.FF.W.0048.210830T1653Z-210830T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Louisville KY
1253 PM EDT Mon Aug 30 2021

The National Weather Service in Louisville has issued a

* Flash Flood Warning for...
  Southwestern Harrison County in central Kentucky...
  Scott County in central Kentucky...

* Until 400 PM EDT.

* At 1253 PM EDT, 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...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Georgetown, Stamping Ground, Sadieville, Mallard Point, Moon Lake 
  Estates, Biddle, Double Culvert, Rogers Gap, Delaplain, and 
  Skinnersburg.

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.

&&

LAT...LON 3840 8447 3828 8443 3828 8444 3826 8443
      3823 8442 3819 8472 3835 8474 3837 8471
      3843 8462 3849 8456

FLASH FLOOD...RADAR INDICATED

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 3:37 AM EDT	Flash Flood Watch	LMK	Adair, Allen, Anderson, Barren, Bourbon, Boyle and 41 more	40 hr
Aug 30, 12:29 PM EDT	Special Weather Statement	LMK	Franklin, Henry, Jefferson, Oldham, Scott, Shelby	46 min
Aug 30, 12:41 PM EDT	Special Weather Statement	LMK	Scott	34 min
Aug 30, 12:47 PM EDT	Areal Flood Advisory	LMK	Anderson, Franklin, Henry, Jefferson, Oldham, Shelby and 1 more	3 hr
Aug 30, 1:04 PM EDT	Flash Flood Warning	LMK	Franklin, Jefferson, Oldham, Shelby	96 min
Aug 30, 1:34 PM EDT	Areal Flood Advisory	LMK	Anderson, Bourbon, Clark, Fayette, Franklin, Garrard and 5 more	3 hr
Aug 30, 3:59 PM EDT	Areal Flood Advisory	LMK	Breckinridge, Meade	2 hr
Aug 30, 4:33 PM EDT	Areal Flood Advisory	LMK	Breckinridge, Hancock	117 min
Aug 30, 6:29 PM EDT	Areal Flood Advisory	LMK	Allen, Barren, Monroe	3 hr
Aug 30, 6:54 PM EDT	Areal Flood Advisory	LMK	Butler, Grayson	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.