Flash Flood Warning 35, NWS Louisville, KY

531 
WGUS73 KLMK 181503
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
1103 AM EDT Thu Jun 18 2026

KYC005-167-179-215-229-239-181513-
/O.CAN.KLMK.FF.W.0035.000000T0000Z-260618T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Anderson KY-Mercer KY-Nelson KY-Spencer KY-Washington KY-Woodford
KY-
1103 AM EDT Thu Jun 18 2026

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHERN ANDERSON, NORTHERN 
MERCER, EASTERN NELSON, SOUTHEASTERN SPENCER, NORTHEASTERN 
WASHINGTON AND SOUTHWESTERN WOODFORD COUNTIES...

Flood waters have receded. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flood Watch remains in effect until 200 AM EDT Friday for portions 
of east central, north central, northwest, and south central 
Kentucky.

&&

LAT...LON 3794 8515 3799 8517 3799 8481 3787 8476
      3784 8519 3786 8522

$$

AMS

Area Forecast Discussion
National Weather Service Louisville KY
655 AM EDT Thu Jun 18 2026

...Updated Aviation Discussion...

.KEY MESSAGES...

* Storms are ongoing across south central IN and southern IL
  that will continue to move east into the forecast area. All
  severe threats remain on the table as these storms have a
  history of producing.

* A Flood Watch is in effect from 9 PM EDT tonight to 9 AM EDT
  tomorrow, mainly along and north of I-64.

* The cold front stalls across the region, leading to additional
  potential for scattered strong to severe storms, excessive
  rainfall, and isolated flash flooding across south-central KY
  Thursday afternoon and evening.

* A reprieve from rainfall comes Friday and Saturday before the next
  round of widespread rain returns starting late Saturday night.

&&

.SHORT TERM /THROUGH TONIGHT/...
Issued at 133 AM EDT Thu Jun 18 2026

A low pressure system is currently centered over the Wisconsin and
Illinois border with a cold front stretched SW through northern
Illinois and north central Missouri. A low level jet is also
centered over central Indiana that will begin to sink south slightly
as the cold front starts to push SE.

Ahead of the front, a line of strong to severe storms will move
through the Ohio Valley overnight. Southern IN counties can expect
storms to start to move in between 12 and 2 am EDT, and continue to
move SE into northern KY through the early morning hours. Storms
will have the potential to produce wind, hail, and even a few
tornadoes. The greatest severe potential remains in southern IN and
northern KY along the Ohio River. The environment is expected to
hold on to 1500 - 2000 J/kg with the capping expected to diminish
through the night. Additionally, low level wind shear values will
likely range from 40-50 kts as a strong low level jet is over the
area through the night. There is a possibility that the lower level
inhibition holds on and decreases the severe threat to the area by
preventing any additional growth. PWAT values are currently hovering
around 2" and are expected to hold steady. As storms move through
this leads to a flash flooding concern, especially with training
storms. QPF values will likely range 1" to 2" throughout the area,
with some localized values of 3" possible with longer residence
times. A Flood Watch is has been issued for the northern part of the
CWA through Thursday morning.

Thursday afternoon and evening another round of severe storms are
possible for central and southern parts of KY as the cold front
slows over the Ohio Valley. As ample moisture stays in place over
the region flooding will be an area of concern, along with damaging
winds. A secondary Flood Watch for tomorrow is likely for areas in
south central KY. The overall shear profile will weaken through the
day tomorrow, deceasing the threat for tornado potential. Scattered
rain showers and a few thunderstorms will move in behind this line
of storms that will persist overnight.

&&

.LONG TERM /FRIDAY THROUGH WEDNESDAY/...
Issued at 133 AM EDT Thu Jun 18 2026

The previously mentioned cold front will finally move out of eastern
KY Friday morning, along with any lingering rain showers. Surface
high pressure will build in behind the front bringing warm and dry
weather. Northwesterly flow will become dominant keeping maximum
temperatures on Friday in the low 80s with mostly clear skies.
Dewpoints are expected to stay in the upper 50s and low 60s, leading
to a very nice Friday. Saturday is looking to be a rinse and repeat
with highs in the low to mid 80s.

Dry weather comes to an end for the later half of the weekend as a
shortwave ejects from the Rockies Saturday night into Sunday morning.
A surface low pressure will then form and move into the Ohio Valley.
Widespread rain showers and scattered thunderstorms are expected to
move ESE through the forecast area Sunday afternoon and evening into
Monday. Severe threats are uncertain at this point, but is not out
of the question. Instability seems to be marginal with the highest
values remaining elevated. PWAT values greater than 1.5" will
quickly build into the area ahead of the low. Long range guidance is
estimating QPF near 1.5" by Monday night, therefore continued
monitoring will be needed for any flooding concerns.

The surface low will move east out of the area Monday evening, with
another area of high pressure building in behind it. Several chances
for scattered rain showers through midweek will be possible as
several shortwaves move through. However, chances remain low as the
high pressure and drier air stays in place. Temperatures are
expected to remain in the low to mid 80s through midweek.

&&

.AVIATION /12Z TAFS THROUGH 18Z FRIDAY/...
Issued at 654 AM EDT Thu Jun 18 2026

A west to east line of showers and storms are moving through north
central KY currently causing lowered vis and gusty winds. MVFR and
IFR conditions are expected to continue through these
showers/storms. Rain showers and thunderstorms will continue to
linger in south central KY through this afternoon and evening.
OVC/BKN050 clouds will stick around for BWG/LEX/RGA through this
evening into tonight. Winds will likely become variable over night
and become northwesterly by tomorrow morning.

&&

.LMK WATCHES/WARNINGS/ADVISORIES...
KY...Flood Watch until 9 AM EDT this morning for KYZ025-029>043-049.
IN...Flood Watch until 9 AM EDT /8 AM CDT/ this morning for
     INZ076>079-083-084-089>092.

&&

SHORT TERM...CAL
LONG TERM...CAL
AVIATION...CAL

Preliminary Local Storm Report
National Weather Service Louisville KY
358 AM EDT Thu Jun 18 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0302 AM     Tstm Wnd Dmg     2 NNE Becks Mill        38.57N 86.13W
06/18/2026                   Washington         IN   911 Call Center

            Tree down at the intersection of South Becks
            Mill Road and West Mitchell Road.

&&

SRW

Preliminary Local Storm Report
National Weather Service Louisville KY
501 AM EDT Thu Jun 18 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0410 AM     Tstm Wnd Gst     2 S Eminence            38.33N 85.17W
06/18/2026  M58 MPH          Shelby             KY   Mesonet

            Measured by the Shelby County North Mesonet
            station.

&&

CAL

Preliminary Local Storm Report
National Weather Service Louisville KY
509 AM EDT Thu Jun 18 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0440 AM     Tstm Wnd Dmg     1 NW Pewee Valley       38.32N 85.50W
06/18/2026                   Oldham             KY   911 Call Center

            Power lines/ wires down.

&&

CAL

Preliminary Local Storm Report
National Weather Service Louisville KY
524 AM EDT Thu Jun 18 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0503 AM     Flood            2 WSW Jeffersontown     38.20N 85.60W
06/18/2026                   Jefferson          KY   911 Call Center

            Water rescue from vehicle near S Hurstbourne
            Parkway and Six Mile Lane.

&&

CAL

Preliminary Local Storm Report
National Weather Service Louisville KY
652 AM EDT Thu Jun 18 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0505 AM     Tstm Wnd Dmg     2 NE Clintonville       38.11N 84.24W
06/18/2026                   Bourbon            KY   Trained Spotter

            Multiple trees down across Escondida Road.
            Time estimated from radar.

&&

BJS