Alert archive / Kentucky / Flash Flood Warnings in 2020

Flash Flood Warning 49, NWS Louisville, KY

July 9, 2020Franklin County, Kentucky

NWS Louisville, KY issued this flash flood warning at Jul 9, 2020, 2:14 PM EDT for Franklin County, Kentucky. It was in force for 95 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 9, 2020, 2:14 PM EDT (18:14 UTC)
Expired
Jul 9, 2020, 3:49 PM EDT
In force
95 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon
Flood severity
None

County Franklin County, KY

The radar

The Louisville radar (KLVX), 99 km from the middle of the area, began a volume at 18:15 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.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.2 hours before the alert went out and 162 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 2020-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 689 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, Cncnati-Daytn, OH at 12:00Z on 2020-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.1939Sfc1 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
689 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
1426 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
-11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

366 
WGUS53 KLMK 091814
FFWLMK
KYC073-092115-
/O.NEW.KLMK.FF.W.0049.200709T1814Z-200709T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Louisville KY
214 PM EDT Thu Jul 9 2020

The National Weather Service in Louisville has issued a

* Flash Flood Warning for...
  Central Franklin County in central Kentucky...

* Until 515 PM EDT.

* At 213 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  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 flooding include...
  Frankfort, Slickway, Big Eddy, Jett, Elsinore, Bon Air Hills and
  Harvieland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3824 8479 3817 8478 3814 8486 3819 8490
      3822 8491 3828 8492 3828 8486

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

DM
2 follow-up statements
722 
WGUS73 KLMK 091855
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
255 PM EDT Thu Jul 9 2020

KYC073-092115-
/O.CON.KLMK.FF.W.0049.000000T0000Z-200709T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin KY-
255 PM EDT Thu Jul 9 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM EDT FOR
CENTRAL FRANKLIN COUNTY...

At 254 PM EDT, Doppler radar indicated over two inches of rain have 
already fallen within the flash flood warning area. While the 
heaviest rains have ended, flash flooding is ongoing or expected to 
begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

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 flooding include...
Frankfort, Jett, Slickway and Bon Air Hills. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3822 8480 3817 8479 3815 8484 3821 8488
      3825 8488 3826 8485

FLASH FLOOD...RADAR INDICATED

$$

DM
138 
WGUS73 KLMK 091949
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
349 PM EDT Thu Jul 9 2020

KYC073-091959-
/O.CAN.KLMK.FF.W.0049.000000T0000Z-200709T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin KY-
349 PM EDT Thu Jul 9 2020

...THE FLASH FLOOD WARNING FOR CENTRAL FRANKLIN COUNTY IS
CANCELLED...

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

LAT...LON 3822 8480 3817 8479 3815 8484 3821 8488
      3825 8488 3826 8485

$$

DM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 8:01 PM EDTSpecial Weather StatementLMKRussell29 min
Jul 9, 12:05 PM EDTSpecial Weather StatementLMKBourbon, Scott25 min
Jul 9, 12:58 PM EDTSpecial Weather StatementLMKScott32 min
Jul 9, 1:18 PM EDTSevere Thunderstorm WarningLMKFayette, Scott, Woodford12 min
Jul 9, 1:32 PM EDTSevere Thunderstorm WarningLMKFranklin, Woodford28 min
Jul 9, 1:39 PM EDTSpecial Weather StatementLMKLarue36 min
Jul 9, 2:02 PM EDTSpecial Weather StatementLMKFranklin, Woodford28 min
Jul 9, 2:16 PM EDTAreal Flood AdvisoryLMKHardin, Meade3 hr
Jul 9, 2:53 PM EDTSpecial Weather StatementLMKWashington22 min
Jul 9, 3:15 PM EDTSpecial Weather StatementLMKWashington15 min
Jul 9, 3:28 PM EDTSpecial Weather StatementLMKBourbon32 min
Jul 9, 4:47 PM EDTAreal Flood AdvisoryLMKJefferson3 hr
Jul 9, 5:03 PM EDTSpecial Weather StatementLMKBreckinridge27 min
Jul 9, 6:39 PM EDTSpecial Weather StatementLMKMadison36 min
Jul 9, 7:10 PM EDTSpecial Weather StatementLMKBourbon, Clark, Madison65 min

Nearby

Flash Flood Warnings in Kentucky, 2020Every flash flood warning in 2020

Sources

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