Severe Thunderstorm Warning 20, NWS Louisville, KY

762 
WWUS53 KLMK 172122
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
522 PM EDT SAT MAR 17 2018

KYC155-217-172132-
/O.CAN.KLMK.SV.W.0020.000000T0000Z-180317T2145Z/
Marion KY-Taylor KY-
522 PM EDT SAT MAR 17 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARION AND
NORTHEASTERN TAYLOR COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until midnight EDT for
central Kentucky.

LAT...LON 3734 8460 3741 8502 3756 8500 3761 8464
      3760 8463 3760 8462 3759 8462 3758 8460
TIME...MOT...LOC 2122Z 278DEG 40KT 3746 8494 

$$

KYC021-045-137-172145-
/O.CON.KLMK.SV.W.0020.000000T0000Z-180317T2145Z/
Lincoln KY-Boyle KY-Casey KY-
522 PM EDT SAT MAR 17 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR LINCOLN...SOUTHERN BOYLE AND NORTHEASTERN CASEY COUNTIES...

At 522 PM EDT, a severe thunderstorm was located 9 miles north of
Liberty, moving east at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Stanford, Junction City, Hustonville, Peytons Store, Boneyville,
Forkland, Geneva, Rowland, Maywood and New Salem.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Report severe weather to local law enforcement, post your report to
the National Weather Service Louisville Facebook page, or tweet your
report using hashtag L, M, K, spotter.

&&

LAT...LON 3734 8460 3741 8502 3756 8500 3761 8464
      3760 8463 3760 8462 3759 8462 3758 8460
TIME...MOT...LOC 2122Z 278DEG 40KT 3746 8494 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

MJ

265 
WWUS53 KLMK 172130
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
530 PM EDT SAT MAR 17 2018

KYC021-045-137-172140-
/O.CAN.KLMK.SV.W.0020.000000T0000Z-180317T2145Z/
Lincoln KY-Boyle KY-Casey KY-
530 PM EDT SAT MAR 17 2018

...THE SEVERE THUNDERSTORM WARNING FOR LINCOLN...SOUTHERN BOYLE AND
NORTHEASTERN CASEY COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been cancelled.

A severe thunderstorm watch remains in effect until midnight EDT for
central Kentucky.

LAT...LON 3734 8460 3741 8502 3756 8500 3761 8464
      3760 8463 3760 8462 3759 8462 3758 8460
TIME...MOT...LOC 2130Z 278DEG 40KT 3745 8482 

$$

MJ

Area Forecast Discussion
National Weather Service Louisville KY
434 PM EDT Sat Mar 17 2018

.Mesoscale Update...
Issued at 433 PM EST Sat Mar 17 2018

Storms have developed along a well defined surface boundary
stretching across central KY in an environment characterized by 1000-
1500 J/Kg surface based instability coincident with 50-55 knots of
effective bulk shear. Given strong speed shear with height along
with some veering with height, supercell structures (some splitting)
are possible. The main concern is large hail given freezing levels
around 8K feet and -20C heights around 18 K feet. A damaging wind
threat will also exist given steep low level lapse rates with a 20
degree T/Td spread at the surface. There is a possibility that
storms could congeal, and if a cold pool is established the wind
threat would increase.

An isolated tornado can't be ruled out, however low level surface
winds aren't overly backed to promote horizontal streamwise
vorticity ingestion. In addition, LCL's are in the 1000-1200 M
range. Latest mesoanalysis shows effective SRH values around 50-100
M2/S2 along the boundary so there is some localized enhancement of
the environment along the front.

Severe Thunderstorm Watch #10 was just issued and expires at
Midnight EDT. However, expect storms to move east of our area by
around 6-7 PM EDT.

&&

.Short Term...(This evening through Sunday night)
Issued at 215 PM EDT Sat Mar 17 2018

As of 2 PM, a surface analysis showed an area of low pressure
centered near Owensboro, Kentucky. GOES-East mesoscale visible
imagery depicted an arch of enhanced cumulus denoting the warm front
location that was along an Owensboro-Elizabethtown-Lexington line.
South of that boundary, spring-like weather prevailed with mostly
sunny skies, breezy southwest winds, and temperatures in the 70s.
Northward, across southern Indiana, lower clouds and easterly flow
prevailed and readings were in the 40s. Across the forecast area,
there is about a 30-35 degree temperature gradient.

A pool of near-60 degree dewpoints lie across south-central
Kentucky, contributing to about 500 to 1000 J/kg of surface-based
CAPE, per recent RAP mesoanalysis and GOES-East CAPE derived
product. Aloft, the presence of a passing shortwave is providing
modest deep-layer shear, on the order of 40 to 50 kts.

In the next 3-5 hours, a brief window of opportunity exists for
strong to marginally severe thunderstorms where the axis of
instability remains as the surface low tracks east through central
Kentucky providing the necessary lift to initiate convection. The
available hi-res models show the area where the risk exists is from
around Lexington southward toward Lake Cumberland, and as far west
as Glasgow, Campbellsville, and Springfield Kentucky. The latest SPC
Day 1 outlook nudged the marginal/slight risks westward from the
early morning issuance.

The main hazards for any storm that does develop is large hail
(quarter sized) thanks to the lower freezing levels (8-10 kft),
steep low-level lapse rates, and drier air aloft. If storms
organized into small clusters, a damaging wind threat also exists.

The main time frame is from around 3-4 pm through 7 pm as the storms
develop and quickly move eastward into eastern KY/TN.

The surface low moves east of the area this evening and drags the
cold front back through the area. There is a drizzle / light shower
chance across the northern areas and northern Bluegrass later this
evening, then temperatures tonight will fall into the upper 30s to
lower 40s with mostly cloudy to overcast skies.

On Sunday, seasonable readings are expected as high pressure builds
into the region. Drier air working in from north will erode the
cloud layer initially over southern Indiana and north central
Kentucky, where a mostly to partly sunny day is expected. Further to
the southwest, across south-central and west-central Kentucky, the
effects of that dry air are limited and time-height cross sections
show more moisture lingering, so a mostly cloudy to overcast day is
forecast. The clouds will impact high temperatures, and southern
Indiana may end up slightly warmer than south-central Kentucky by a
few degrees. Most areas will range from 55 to 60.

The next weather system is quick to move into the region as the
upper level pattern remains quite progressive. Showers are likely
Sunday night, especially after midnight across south central and
central Kentucky. Lows will fall into the 40s.

.Long Term...(Monday through Saturday)
Issued at 220 PM EDT Sat Mar 17 2018

An unsettled weather pattern is in store for the upcoming work week
across the lower Ohio and Tennessee Valleys. The progressive but
active pattern could bring both spring and winter weather to the
area.

The 17.12z models are in reasonable agreement showing a compact
shortwave tracking across the Tennessee Valley Monday. At the
surface, a low pressure looks to organize and track across middle TN
during the afternoon and evening hours. This setup will put a warm
front somewhere along the KY/TN border or into south-central KY. The
best dewpoint surge, instability, and potential severe weather
threat continues to be across TN/AL/GA. However, a time-trend
analysis over the last several model runs shows a slight northward
jog in the surface low and shortwave, and if this trend continues,
portions of south-central KY could be under a threat for stronger to
severe storms Monday afternoon/evening.

Further north, a frontogenetical band of rain is likely to setup
across southern Indiana and north central Kentucky. As temperatures
cool behind the front Monday night and Tuesday morning, a brief
changeover to wet snow is possible but at this time, the colder air
lags the precipitation enough to preclude much if any snowfall
accumulation.

The Tuesday-Wednesday period has more uncertainty and lower
confidence. The potential phasing or not of the upper level energy
and the southern stream system could spread light precipitation
across portions of eastern and central Kentucky. It does appear to
be much colder with highs in the 40s, and potentially staying stuck
in the 30s. For now, continued with a model consensus but will need
to watch this period for the potential for light snow accumulations
across the Bluegrass.

The remainder of the work week looks more benign with high pressure
and seasonably cool temperatures. Toward next weekend it appears
another system may track through the Midwest and OH Valleys and
bring chances for showers and thunderstorms to the area.

&&

.Aviation...(18Z TAF Issuance)
Issued at 112 PM EDT Sat Mar 17 2018

Surface warm frontal boundary is located just south of an HNB-SDF-
LEX line this afternoon.  This boundary looks to move a little
further northward this afternoon.  However, a surface low pressure
area will move eastward along the front and drag a cold front
through the region this afternoon.  IFR/MVFR conditions will be seen
at KHNB since they are on the cool side of the front.  The winds
there will shift to the northwest this afternoon and low clouds will
remain in place through the evening and into the overnight hours
before clearing out near sunrise.

Over at KSDF and KLEX, some clearing may work into the terminals
this afternoon as the warm front inches northward.  With the surface
low moving eastward, a threat of showers, and perhaps a thunderstorm
or two will be possible through 18/00Z.  The best chance of storms
though look to be south and east of those terminals.  Winds will
shift to the northwest this evening with MVFR cigs lingering through
early Sunday morning.

Down at KBWG, warm front is already past the terminal and VFR
conditions are expected through the period.  Gusty southwest winds
of 13-18kts with gusts to 25-27kts will be seen this afternoon.
Winds will shift with the cold frontal passage this afternoon and a
period of MVFR/VFR cigs will be seen this evening and into the
overnight with some clearing by Sunday morning.

&&

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

Mesoscale...BJS
Short Term...ZT
Long Term...ZT
Aviation.....MJ

Hazardous Weather Outlook
National Weather Service Louisville KY
257 PM EDT Sat Mar 17 2018

INZ076>079-083-084-089>092-KYZ023>038-042-043-061-070-181900-
Orange-Washington-Scott-Jefferson-Dubois-Crawford-Perry-Harrison-
Floyd-Clark-Hancock-Breckinridge-Meade-Ohio-Grayson-Hardin-Bullitt-
Oldham-Trimble-Henry-Shelby-Franklin-Spencer-Bourbon-Nicholas-Butler-
Logan-
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, Paris, Carlisle, Morgantown, and Russellville
257 PM EDT Sat Mar 17 2018 /157 PM CDT Sat Mar 17 2018/

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

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Scattered thunderstorms are possible across the region Monday
afternoon and night. The greatest chance of storms, and strong
storms, will be across south-central Kentucky.

Another weather system could bring some wet snow to east-central
Kentucky Tuesday night and Wednesday morning with minor accumulation
possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

KYZ039>041-045>049-053>057-062>067-071>078-081-082-181900-
Anderson-Woodford-Fayette-Nelson-Washington-Mercer-Jessamine-Clark-
Larue-Marion-Boyle-Garrard-Madison-Edmonson-Hart-Green-Taylor-Casey-
Lincoln-Warren-Simpson-Allen-Barren-Monroe-Metcalfe-Adair-Russell-
Cumberland-Clinton-
Including the cities of Lawrenceburg, Versailles, Lexington,
Bardstown, Springfield, Harrodsburg, Nicholasville, Winchester,
Hodgenville, Lebanon, Danville, Lancaster, Richmond, Brownsville,
Horse Cave, Greensburg, Campbellsville, Liberty, Stanford,
Bowling Green, Franklin, Providence, Scottsville, Glasgow,
Tompkinsville, Edmonton, Columbia, Jamestown, Burkesville,
and Albany
257 PM EDT Sat Mar 17 2018 /157 PM CDT Sat Mar 17 2018/

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

.DAY ONE...Tonight.

Scattered thunderstorms are possible through early evening across
south-central and east-central Kentucky. A few strong to marginally
severe storms are possible. Primary hazards if strong to severe
storms develop are hail and damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Scattered thunderstorms are possible across the region Monday
afternoon and night. The greatest chance of storms, and strong
storms, will be across south-central Kentucky.

Another weather system could bring some wet snow to east-central
Kentucky Tuesday night and Wednesday morning with minor accumulation
possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

ZT

Special Weather Statement
National Weather Service Louisville KY
413 PM EDT SAT MAR 17 2018

KYZ041-047-048-055>057-067-172045-
Boyle-Mercer-Fayette-Jessamine-Lincoln-Madison-Garrard-
413 PM EDT SAT MAR 17 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN LINCOLN...
SOUTHEASTERN MERCER...GARRARD...SOUTHERN JESSAMINE...BOYLE...
NORTHWESTERN MADISON AND SOUTHEASTERN FAYETTE COUNTIES...

At 413 PM EDT, a strong thunderstorm was located near Danville,
moving east at 50 mph.

Winds in excess of 30 mph and half inch hail are possible with this
storm.

Locations impacted include...
Richmond, Danville, Lancaster, Mccreary, Junction City, Burgin,
Peytontown, Caldwell Manor, Parksville and Marksbury.

LAT...LON 3754 8488 3770 8496 3791 8434 3790 8435
      3789 8433 3766 8423
TIME...MOT...LOC 2013Z 251DEG 43KT 3765 8483

MJ

Special Weather Statement
National Weather Service Louisville KY
423 PM EDT SAT MAR 17 2018

KYZ045-053-172100-
Nelson-Larue-
423 PM EDT SAT MAR 17 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL NELSON AND
SOUTHERN LARUE COUNTIES...

At 423 PM EDT, a strong thunderstorm was located over Hodgenville,
moving east at 40 mph.

Winds in excess of 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Hodgenville, Boundary Oak, Mathers Mill, Attilla, Howardstown,
Stiles, Leafdale, Gleanings, Tanner and Ginseng.

LAT...LON 3750 8583 3760 8581 3758 8551 3756 8552
      3754 8550 3752 8549 3749 8547 3747 8547
      3747 8549 3748 8550 3748 8551 3747 8552
TIME...MOT...LOC 2023Z 275DEG 35KT 3755 8575

ZT

Special Weather Statement
National Weather Service Louisville KY
500 PM EDT SAT MAR 17 2018

KYZ055-056-066-067-172145-
Boyle-Lincoln-Garrard-Casey-
500 PM EDT SAT MAR 17 2018

...A STRONG THUNDERSTORM WILL AFFECT LINCOLN...SOUTHEASTERN
GARRARD...SOUTHERN BOYLE AND NORTH CENTRAL CASEY COUNTIES...

At 500 PM EDT, a strong thunderstorm was located 13 miles southwest
of Danville, moving east at 35 mph.

Wind gusts up to 50 mph and nickel size hail are possible with this
storm.

Locations impacted include...
Stanford, Junction City, Crab Orchard, Hustonville, Peytons Store,
Boneyville, Alum Springs, Parksville, Ottenheim and Gilbert.

LAT...LON 3748 8442 3748 8445 3733 8450 3735 8455
      3734 8458 3747 8502 3763 8497 3757 8439
TIME...MOT...LOC 2100Z 284DEG 32KT 3751 8494

ZT

Special Weather Statement
National Weather Service Louisville KY
500 PM EDT SAT MAR 17 2018

KYZ063>065-074-076-077-172130-
Hart-Metcalf-Taylor-Barren-Adair-Green-
500 PM EDT SAT MAR 17 2018

...A STRONG THUNDERSTORM WILL AFFECT GREEN...SOUTHEASTERN HART...
CENTRAL TAYLOR...NORTHEASTERN BARREN...NORTHWESTERN METCALFE AND
NORTHERN ADAIR COUNTIES...

At 500 PM EDT/400 PM CDT/, a strong thunderstorm was located near
Munfordville, moving east at 65 mph.

Winds in excess of 30 mph and nickel size hail are possible with this
storm.

Locations impacted include...
Campbellsville, Columbia, Greensburg, Munfordville, Monroe, Horse
Cave, Pickett, Absher, Node and Arista.

LAT...LON 3709 8592 3727 8595 3739 8518 3712 8514
TIME...MOT...LOC 2100Z 262DEG 55KT 3719 8585

MJ

Special Weather Statement
National Weather Service Louisville KY
501 PM EDT SAT MAR 17 2018

KYZ054-055-065-066-172115-
Boyle-Marion-Taylor-Casey-
501 PM EDT SAT MAR 17 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN MARION...
NORTHEASTERN TAYLOR...SOUTHWESTERN BOYLE AND NORTHWESTERN CASEY
COUNTIES...

At 501 PM EDT, a strong thunderstorm was located near Lebanon, moving
east at 40 mph.

Dime size to nickel sized hail is possible with this storm.

Locations impacted include...
Lebanon, Bradfordsville, Peytons Store, Brumfield, Spurlington,
Belltown, Forkland, Jessietown, Jacktown and Poplar Corner.

LAT...LON 3740 8533 3760 8532 3763 8495 3739 8496
TIME...MOT...LOC 2101Z 272DEG 36KT 3750 8526

MJ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
504 PM EDT SAT MAR 17 2018

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

0448 PM     HAIL             GRAVEL SWITCH           37.58N 85.05W
03/17/2018  E0.88 INCH       MARION             KY   PUBLIC

            ENOUGH HAIL TO COVER THE GROUND. LARGEST
            SIZE NICKEL.

&&

BJS