Flash Flood Warning 20, NWS Louisville, KY

093 
WGUS73 KLMK 250159
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
959 PM EDT Sun May 24 2020

INC019-250345-
/O.CON.KLMK.FF.W.0020.000000T0000Z-200525T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark IN-
959 PM EDT Sun May 24 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT FOR
CENTRAL CLARK COUNTY...

At 957 PM EDT, the storm that initially prompted the warning had 
weakened. However, new storms have been developing west and north of 
New Albany and will move into the warning area. Flash flooding is 
ongoing.

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...
Clarksville, Charlestown, Sellersburg, Speed, Henryville, Otisco, 
and Memphis.

Street flooding has been reported in Sellersburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3858 8565 3838 8570 3838 8579 3839 8580
      3858 8578

FLASH FLOOD...RADAR INDICATED

$$

13

011 
WGUS73 KLMK 250340
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
1140 PM EDT Sun May 24 2020

INC019-250346-
/O.EXP.KLMK.FF.W.0020.000000T0000Z-200525T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark IN-
1140 PM EDT Sun May 24 2020

...THE FLASH FLOOD WARNING FOR CENTRAL CLARK COUNTY WILL EXPIRE AT
1145 PM EDT...

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

Flooding was reported in Sellersburg. The heaviest rain, however, 
appears to have fallen between Speed and Memphis, including the 
Perry Crossing area.

LAT...LON 3858 8565 3838 8570 3838 8579 3839 8580
      3858 8578

$$

13

Area Forecast Discussion
National Weather Service Louisville KY
641 PM EDT Sun May 24 2020

...Updated Aviation Discussion...

.Short Term...(This evening through Monday)
Issued at 300 PM EDT Sun May 24 2020

While the region remains fairly quiet at the moment, a few pop-up
storms have begun developing over eastern KY. Current satellite
imagery shows areas of stratus and strato cu increasing in
coverage with the aid of afternoon heating. Despite having decent
instability, PWATs, and dewpoints to work with, latest CAMs seem
rather unimpressed with shower/storm coverage this afternoon.
That's not to say that a few still won't develop, however, expect
those that do to be very isolated in nature. Like yesterday, the
main hazards would be brief heavy downpours, gusty winds, and
lightning. Expect dry conditions to prevail during the overnight
period, with lows forecast to fall into the mid to upper 60s.

Another hot day is in store for Memorial Day as the region remains
situated under a persistent ridging pattern. With the aid of
southerly flow and WAA, have temps climbing into the upper 80s with
heat index values in the low 90s. Much like the last couple of days,
model guidance continues to support the development of
showers/storms, with peak convection occurring in the afternoon to
early evening hours. While instability will be plentiful during the
afternoon due to strong insolation, overall wind shear across the
region will be fairly low, suggesting pulse type thunderstorms would
be the primary storm mode. As such, any stronger storm would be
capable of producing locally heavy downpours, gusty winds, and small
hail.

.Long Term...(Monday night through Sunday)
Issued at 245 PM EDT Sun May 24 2020

After any scattered storms die off Monday evening, what looked like
a fairly persistent a few days ago may become interrupted by our new
best friend...a cutoff upper low. This time the low looks to stall
out over the Southern Plains/Red River Valley region, but this
location will have some impact on our weather in the Ohio Valley. It
will mean less low-level thicknesses across the region, leading to
forecast temperatures a little cooler than the heat we've had the
last couple of days.

Tuesday will be a transition day for this regime. It probably will
still be well above normal for temperatures, and this could lead to
another round of scattered storms, depending on any triggers across
the region. One trigger that a few models are keying in on is a
shortwave moving up out of the Appalachians, wrapping around the
flow associated with that upper low to the southwest. This could
bring storms moving in from the southeast, an unusual direction for
this region.

Wednesday and Thursday not too sold on the precipitation models
bring through here...again because of the cooler temperatures and
subsequent less instability. Moisture availability will still be
above normal, per sounding climatologies...but a lack of triggers
may limit coverage. Have undercut the blend of models here a little.

As we get to Thursday night/Friday, a wave moves through the
westerly flow over the Great Lakes, dragging a cold front into the
Midwest. This front likely will have some influence in nudging the
upper low to our southwest a little farther away from us, but not
totally convinced that it will push far enough south to remove rain
chances from our region for the weekend. The wet-biased blended
model solution for next weekend has come in with widely scattered
storm chances each day...which is the climatological pop for this
time of year. As mentioned before, will undercut this pop a little,
but keep in isolated to widely scattered chances (latter in southern
KY) along with normal temperatures.

&&

.Aviation...(00Z TAF Issuance)
Issued at 641 PM EDT Sun May 24 2020

Once early evening convection dies off, the rest of the night will
be quiet with light winds and VFR conditions. Patchy fog in the area
isn't out of the question, but as of now it looks like the terminals
will remain free of visibility restrictions.

Tomorrow will be another warm day with south breezes and scattered
afternoon storms.

&&

.LMK WATCHES/WARNINGS/ADVISORIES...
IN...None.
KY...None.
&&

Short Term...SSC
Long Term...RJS
Aviation...13

Hazardous Weather Outlook
National Weather Service Louisville KY
313 PM EDT Sun May 24 2020

INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067-
070>078-081-082-251915-
Orange-Washington-Scott-Jefferson-Dubois-Crawford-Perry-Harrison-
Floyd-Clark-Hancock-Breckinridge-Meade-Ohio-Grayson-Hardin-Bullitt-
Oldham-Trimble-Henry-Shelby-Franklin-Spencer-Anderson-Woodford-
Fayette-Bourbon-Nicholas-Nelson-Mercer-Jessamine-Larue-Marion-Boyle-
Garrard-Madison-Butler-Edmonson-Hart-Green-Taylor-Casey-Lincoln-
Logan-Warren-Simpson-Allen-Barren-Monroe-Metcalfe-Adair-Russell-
Cumberland-Clinton-
Including the cities of Paoli, Salem, Scottsburg, Madison, Jasper,
English, Tell City, Corydon, New Albany, Jeffersonville, Lewisport,
Hawesville, Hardinsburg, Brandenburg, Hartford, Leitchfield,
Elizabethtown, Shepherdsville, Louisville, La Grange, Bedford,
Milton, New Castle, Shelbyville, Frankfort, Georgetown, Cynthiana,
Taylorsville, Lawrenceburg, Versailles, Lexington, Paris, Carlisle,
Bardstown, Springfield, Harrodsburg, Nicholasville, Winchester,
Hodgenville, Lebanon, Danville, Lancaster, Richmond, Morgantown,
Brownsville, Horse Cave, Greensburg, Campbellsville, Liberty,
Stanford, Russellville, Bowling Green, Franklin, Providence,
Scottsville, Glasgow, Tompkinsville, Edmonton, Columbia, Jamestown,
Burkesville, and Albany
313 PM EDT Sun May 24 2020 /213 PM CDT Sun May 24 2020/

This hazardous weather outlook is for portions of south central
Indiana and Central Kentucky.

.DAY ONE...Tonight.

Scattered showers and thunderstorms are expected into the evening
across the outlook area. The strongest storms will produce locally
heavy rainfall, gusty winds, hail, and frequent cloud to ground
lightning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Scattered thunderstorms are expected for the next several days,
especially in the heat of the afternoons and early evenings. Some
storms will produce locally heavy downpours and gusty winds. All
thunderstorms are dangerous and produce lightning.

.SPOTTER INFORMATION STATEMENT...

Widespread spotter activation is not anticipated, but spotters are
always welcome to report observed severe weather and flooding.

&&

More information, along with other weather, hydrological and
climate information can be found, at weather.gov/louisville.

SSC/RJS

Special Weather Statement
National Weather Service Louisville KY
420 PM EDT Sun May 24 2020

INZ077-242045-
Washington-
420 PM EDT Sun May 24 2020

...STRONG THUNDERSTORM NEAR SALEM...

At 419 PM EDT, a strong thunderstorm was located 8 miles southeast of
Salem, moving northeast at 10 mph.

Winds in excess of 40 mph and nickel size hail are possible with
this storm.

Locations impacted include...
Blue River, New Pekin, Little York, New Philadelphia, Farabee, Daisy
Hill, South Boston, New Liberty, and Harristown.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3872 8589 3858 8588 3857 8586 3855 8586
      3855 8587 3852 8587 3852 8588 3850 8589
      3850 8596 3849 8596 3849 8600 3857 8606
TIME...MOT...LOC 2019Z 242DEG 10KT 3855 8597

13

Special Weather Statement
National Weather Service Louisville KY
446 PM EDT Sun May 24 2020

INZ077-078-092-242115-
Washington-Clark-Scott-
446 PM EDT Sun May 24 2020

...LINE OF STRONG THUNDERSTORMS BETWEEN SALEM AND SCOTTSBURG...

At 445 PM EDT, radar indicated strong thunderstorms from near
Scottsburg to 10 miles east of Salem. Movement was northeast at 15
mph.

Winds in excess of 40 mph and pea size hail are possible with these
storms.

Locations impacted include...
Scottsburg, Vienna, Austin, Little York, Leota, New Liberty and New
Frankfort.

These storms will also impact Interstate 65 in Scott County.

If outdoors, seek shelter inside a building.

LAT...LON 3882 8572 3883 8571 3882 8570 3882 8569
      3880 8568 3856 8580 3854 8596 3876 8593
      3875 8592 3875 8590 3873 8589 3873 8587
      3874 8584 3878 8582 3878 8580 3879 8581
      3881 8579 3882 8574 3883 8573
TIME...MOT...LOC 2045Z 227DEG 11KT 3874 8583 3856 8591

13

Special Weather Statement
National Weather Service Louisville KY
559 PM EDT Sun May 24 2020

INZ077-242215-
Washington-
559 PM EDT Sun May 24 2020

...STRONG THUNDERSTORM NORTHWEST OF SALEM...

At 558 PM EDT, a strong thunderstorm was located 9 miles northwest of
Salem, moving northeast at 10 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Campbellsburg, Prowsville, and Mckinley.

If outdoors, seek shelter inside a building.

LAT...LON 3877 8617 3878 8616 3876 8614 3864 8623
      3868 8629 3877 8624 3878 8623 3877 8622
      3878 8621 3877 8621 3878 8619 3878 8618
TIME...MOT...LOC 2158Z 205DEG 10KT 3869 8623

13

Special Weather Statement
National Weather Service Louisville KY
655 PM EDT Sun May 24 2020

INZ077-242330-
Washington-
655 PM EDT Sun May 24 2020

...STRONG THUNDERSTORM SOUTH OF SALEM...

At 654 PM EDT, a strong thunderstorm was located 7 miles south of
Salem, drifting southeast at 5 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
New Pekin, Shorts Corner, and Farabee.

This storm may intensify, so be certain to monitor local radio
stations and available television stations.

LAT...LON 3845 8612 3858 8610 3856 8599 3844 8604
TIME...MOT...LOC 2254Z 298DEG 5KT 3850 8606

13

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
727 PM EDT SUN MAY 24 2020

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

0430 PM     TSTM WND DMG     2 N BLUE RIVER          38.57N 85.93W
05/24/2020                   WASHINGTON         IN   911 CALL CENTER

            A TREE WAS REPORTED DOWN ON HICKORY GROVE
            ROAD.

&&

KDW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
804 PM EDT SUN MAY 24 2020

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

0755 PM     FLASH FLOOD      2 WNW ODDVILLE          38.46N 84.27W
05/24/2020                   HARRISON           KY   EMERGENCY MNGR

            CAR STALLED IN HIGH WATER ON TWO LICK ROAD.

&&

13