Alert archive / Indiana / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 94, NWS Louisville, KY

April 5, 20175 counties in Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Apr 5, 2017, 5:15 PM EDT for 5 counties in Indiana. It was in force for 45 min. 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: Apr 5, 2017, 5:15 PM EDT (21:15 UTC)
Expired: Apr 5, 2017, 6:00 PM EDT
In force: 45 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Clark County, IN, Floyd County, IN, Harrison County, IN, Scott County, IN, Washington County, IN

The radar

The Louisville radar (KLVX), 68 km from the middle of the area, began a volume at 21:15 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.

What was reported inside it

Time	Report	Where	Remark
Apr 5, 5:17 PM EDT	HAIL 1.75	Palmyra, IN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 2 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 5, 2:50 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.3 hours before the alert went out and 215 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1143 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

214 
WUUS53 KLMK 052115
SVRLMK
INC019-043-061-143-175-052200-
/O.NEW.KLMK.SV.W.0094.170405T2115Z-170405T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
515 PM EDT WED APR 5 2017

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Northwestern Harrison County in south central Indiana...
  West central Clark County in south central Indiana...
  Northwestern Floyd County in south central Indiana...
  Western Scott County in south central Indiana...
  Central Washington County in south central Indiana...

* Until 600 PM EDT

* At 515 PM EDT, severe thunderstorms were located along a line
  extending from 7 miles west of New Providence Town to 7 miles
  northeast of Carefree Town, moving northeast at 60 mph.

  HAZARD...60 mph wind gusts and half dollar size hail. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Scottsburg, Salem, New Providence Town, Austin, Blue River, New
  Pekin, Palmyra, Milltown, Borden and Little York.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 1000 PM EDT for south central
Indiana.

LAT...LON 3883 8571 3839 8598 3829 8625 3831 8627
      3830 8628 3832 8629 3835 8627 3836 8627
      3835 8625 3837 8626 3872 8605 3876 8599
      3875 8598 3876 8596 3875 8592 3875 8590
      3873 8589 3873 8587 3878 8580 3881 8579
TIME...MOT...LOC 2115Z 208DEG 50KT 3844 8609 3832 8626 

HAIL...1.25IN
WIND...60MPH
 
$$

RJS

2 follow-up statements

484 
WWUS53 KLMK 052133
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
533 PM EDT WED APR 5 2017

INC019-043-061-052142-
/O.CAN.KLMK.SV.W.0094.000000T0000Z-170405T2200Z/
Harrison IN-Clark IN-Floyd IN-
533 PM EDT WED APR 5 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HARRISON...WEST
CENTRAL CLARK AND NORTHWESTERN FLOYD COUNTIES IS CANCELLED...

The storms which prompted the warning havemoved out of the warned 
area. Therefore the warning has been cancelled.

A tornado watch remains in effect until 1000 PM EDT for south central
Indiana.

LAT...LON 3883 8571 3851 8591 3849 8604 3850 8618
      3872 8605 3876 8599 3875 8598 3876 8596
      3875 8592 3875 8590 3873 8589 3873 8587
      3878 8580 3881 8579
TIME...MOT...LOC 2132Z 208DEG 50KT 3864 8595 3852 8612 

$$

INC143-175-052200-
/O.CON.KLMK.SV.W.0094.000000T0000Z-170405T2200Z/
Scott IN-Washington IN-
533 PM EDT WED APR 5 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHWESTERN SCOTT AND EASTERN WASHINGTON COUNTIES...

At 532 PM EDT, severe thunderstorms were located along a line
extending from 10 miles west of Scottsburg to near Salem, moving
northeast at 60 mph.

HAZARD...Quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Damage to vehicles is expected. 

Locations impacted include...
Scottsburg, Salem, Austin, Blue River, New Pekin, Little York, Shorts
Corner, South Boston, Harristown and New Philadelphia.

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.

&&

A tornado watch remains in effect until 1000 PM EDT for south central
Indiana.

LAT...LON 3883 8571 3851 8591 3849 8604 3850 8618
      3872 8605 3876 8599 3875 8598 3876 8596
      3875 8592 3875 8590 3873 8589 3873 8587
      3878 8580 3881 8579
TIME...MOT...LOC 2132Z 208DEG 50KT 3864 8595 3852 8612 

HAIL...1.00IN
WIND...<50MPH
 
$$

RJS

792 
WWUS53 KLMK 052150
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
550 PM EDT WED APR 5 2017

INC143-175-052200-
/O.EXP.KLMK.SV.W.0094.000000T0000Z-170405T2200Z/
Scott IN-Washington IN-
550 PM EDT WED APR 5 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SCOTT AND EASTERN
WASHINGTON COUNTIES WILL EXPIRE AT 600 PM EDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.

A tornado watch remains in effect until 1000 PM EDT for south central
Indiana.

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 3883 8571 3851 8591 3849 8604 3850 8618
      3872 8605 3876 8599 3875 8598 3876 8596
      3875 8592 3875 8590 3873 8589 3873 8587
      3878 8580 3881 8579
TIME...MOT...LOC 2150Z 208DEG 50KT 3883 8582 3872 8599 

$$

RJS

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Louisville, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 5, 5:07 PM EDT, 8 minutes earlier.

Area forecast discussion, Apr 5, 5:07 PM EDT, 8 minutes before

Area Forecast Discussion
National Weather Service Louisville KY
507 PM EDT Wed Apr 5 2017

...Mesoscale Forecast Update...
Issued at 507 PM EDT Wed Apr 5 2017

A 5H speed max coming into western Kentucky and the Wabash Valley is
causing storms to blossom in a narrow corridor of PWAT around an
inch, deep moisture convergence, and upper level divergence. The
storms are expected to present a continuing, and possibly
increasing, wind threat as they proceed into areas east of I-65
where mid- and low-level lapse rates are steeper and DCAPE values
are higher. Large hail has been the main severe weather threat so
far with these storms, and that threat will continue.

The best tornado chances over the next few hours will be east of
I-65 and south of the Blue Grass Parkway in area of best SRH/EHI.

.Short Term (Now through Thursday Night)...
Issued at 200 PM EDT Wed Apr 5 2017

...Severe Storms Likely this Afternoon/Evening...
...Windy Conditions Late Tonight and Thursday...

Broad area of low pressure, 999 mb, extends from central MO to
southern IL, with a warm front extending across southern IN this
hour. Sunshine warming up the warm sector quickly, but dewpoints
have stayed down according to area observations. Narrow area of
higher dewpoints over western TN this hour, but very narrow. Still
focused on potential for very large hail and damaging wind gusts as
cold pools come out of supercells. Looking at a better tornado
threat in a couple of areas, one over southern Indiana, along the
front and another across Lake Cumberland as LCL's start to fall.

Even outside of these storms, expect gusty winds because of the
pressure gradient associated with that low pressure. The gradient
will stick around overnight and Thursday. In fact, looking at very
windy conditions for the day Thursday, as much colder air pours in.
Likely we will issue a Wind Advisory later tonight for that Thursday
period, with gusts to around 40 mph.

In addition to the wind, expect showery conditions as moisture wraps
around the upper low travelling by to our north. We may see a brief
transition to rain/snow mix or just snow by daybreak Friday.

.Long Term (Friday through Wednesday)...
Issued at 230 PM EDT Wed Apr 5 2017

...Freezing Temperatures May Return Early Saturday...

Friday morning will be near freezing, but with windy conditions not
expecting frost development. Saturday morning, high pressure will
move across the TN Valley, and that looks to be a better chance for
a freeze, especially in our normally colder locations.

High pressure then shifts east of the region and we should have
another warmup in store for the end of the weekend and the beginning
of the next work week. Our next good rain chance will come in Monday
night, as a cold front approaches.

&&

.Aviation (18Z TAF Update)...
Issued at 110 PM EDT Wed Apr 5 2017

Well...strong low pressure system over MO will move into the CWA by
21z bringing a strong risk of severe storms across KY.

Ahead of this system, winds will slowly veer to the SE and S and
increase to 10 to 18 mph later this afternoon and this evening.  A
potent cold front will move through tonight with winds shifting to
more westerly.

Ahead of the cold front in the warm sector expect 30% coverage of
shra/tsra from 20z through 03z. We are looking for 20-30% coverage
of supercells to develop west of I 65 between 18-20z and move
rapidly to the NE at 50 mph. These will produce very large hail,
damaging winds and isolated tornadoes.  All aircraft flying into all
3 airports should practice tsra avoidance procedures for all
supercell thunderstorms. Very large hail from supercells.

Storms will be widely scattered so will continue to carry VCTS for
now. But will be monitoring closely should one affect any of the
sites.  My hunch is LEX will have thunderstorms around 00z
timeframe.

The storms will move out this evening. Light showers will develop
behind the cold front and move in late tonight and continue into
Thursday.

The story on Thursday will be MVFR CIGS, and very gusty winds from
the west of 20 gusting to 35 mph staring at 16z.  Cold raw dreary
day on the flight line for sure.

&&

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

Mesoscale......13
Short Term.....RJS
Long Term......RJS
Aviation.......JDG

Hazardous weather outlook, Apr 5, 2:57 PM EDT, 2 hours 18 minutes before

Hazardous Weather Outlook
National Weather Service Louisville KY
257 PM EDT Wed Apr 5 2017

INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067-
070>078-081-082-061900-
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
257 PM EDT Wed Apr 5 2017 /157 PM CDT Wed Apr 5 2017/

...TORNADO WATCH 127 IN EFFECT UNTIL 10 PM EDT /9 PM CDT/ THIS
EVENING...

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

.DAY ONE...This Afternoon and Tonight.

Scattered to numerous storms are likely this afternoon and evening as
a cold front approaches the region. Some of these storms will become
quite vigorous with severe weather likely to 10 PM EDT. Damaging
winds, large to very large hail, and a few tornadoes are all
possible.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Cold conditions will return to the area behind the strong cold
front. As a result, light snow may mix in with rain showers Friday
morning. Temperatures will fall close to the freezing mark Saturday
morning with frost or a freeze possible.

.SPOTTER INFORMATION STATEMENT...

Spotters are requested to report hail of any size, strong winds or
wind damage, and any rotation in storms today.

&&

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

RJS

In the hours before

Local storm report, Apr 5, 4:54 PM EDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
454 PM EDT WED APR 5 2017

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

0451 PM     HAIL             EDWARDSVILLE            38.28N 85.90W
04/05/2017  E1.00 INCH       FLOYD              IN   BROADCAST MEDIA

&&

MRC

Local storm report, Apr 5, 4:57 PM EDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
457 PM EDT WED APR 5 2017

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

0456 PM     HAIL             2 WNW HARDINSBURG       37.79N 86.49W
04/05/2017  E0.75 INCH       BRECKINRIDGE       KY   BROADCAST MEDIA

            PEA TO DIME HAIL.

&&

MRC

Local storm report, Apr 5, 5:05 PM EDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
505 PM EDT WED APR 5 2017

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

0502 PM     HAIL             1 SE BOWLING GREEN      36.96N 86.42W
04/05/2017  E0.75 INCH       WARREN             KY   OTHER FEDERAL

            DIME SIZE HAIL AT WARREN COUNTY AIRPORT
            REPORTED BY CIVIL AIR PATROL.

&&

MRC

Local storm report, Apr 5, 5:08 PM EDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
508 PM EDT WED APR 5 2017

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

0504 PM     HAIL             6 NE WOLF CREEK         38.15N 86.31W
04/05/2017  E0.88 INCH       MEADE              KY   TRAINED SPOTTER

&&

MRC

Special weather statement, Apr 5, 5:10 PM EDT, 5 minutes before

Special Weather Statement
National Weather Service Louisville KY
510 PM EDT WED APR 5 2017

INZ092-KYZ031>034-052145-
Clark-Oldham-Shelby-Henry-Trimble-
510 PM EDT WED APR 5 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN CLARK...
OLDHAM...NORTHWESTERN SHELBY...TRIMBLE AND HENRY COUNTIES...

At 510 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 6 miles northeast of Prospect to near
Shelbyville. Movement was northeast at 60 mph.

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

Locations impacted include...
La Grange, New Castle, Bedford, Pendleton, Crestwood, Eminence, Pewee
Valley, Owen, Goshen and Pleasureville.

These storms 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 3858 8521 3860 8508 3856 8506 3857 8504
      3855 8500 3851 8503 3851 8498 3849 8499
      3847 8495 3843 8496 3844 8495 3846 8492
      3844 8493 3842 8489 3822 8530 3842 8568
      3859 8547 3859 8543 3861 8544 3871 8532
TIME...MOT...LOC 2110Z 231DEG 52KT 3843 8555 3828 8528

RJS

Local storm report, Apr 5, 5:11 PM EDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
511 PM EDT WED APR 5 2017

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

0511 PM     TSTM WND GST     3 NE RICH POND          36.93N 86.47W
04/05/2017  M50 MPH          WARREN             KY   MESONET

&&

MRC

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 3:37 PM EDT	Severe Thunderstorm Warning	LMK	Perry	23 min
Apr 5, 3:47 PM EDT	Special Weather Statement	LMK	Orange	28 min
Apr 5, 3:57 PM EDT	Severe Thunderstorm Warning	LMK	Harrison	22 min
Apr 5, 3:58 PM EDT	Special Weather Statement	LMK	Crawford	32 min
Apr 5, 4:27 PM EDT	Special Weather Statement	LMK	Floyd	18 min
Apr 5, 4:34 PM EDT	Severe Thunderstorm Warning	LMK	Clark, Floyd, Harrison	26 min
Apr 5, 4:40 PM EDT	Special Weather Statement	LMK	Crawford	35 min
Apr 5, 4:41 PM EDT	Severe Thunderstorm Warning	LMK	Perry	34 min
Apr 5, 4:53 PM EDT	Severe Thunderstorm Warning	LMK	Crawford, Harrison	22 min
Apr 5, 4:56 PM EDT	Severe Thunderstorm Warning	LMK	Clark, Scott	19 min
Apr 5, 5:00 PM EDT	Severe Thunderstorm Warning	LMK	Crawford, Harrison	15 min
Apr 5, 5:10 PM EDT	Severe Thunderstorm Warning	LMK	Floyd, Harrison	20 min
Apr 5, 5:16 PM EDT	Special Weather Statement	LMK	Jefferson	29 min
Apr 5, 6:10 PM EDT	Severe Thunderstorm Warning	LMK	Clark, Floyd, Harrison	20 min
Apr 5, 7:54 PM EDT	Wind Advisory	LMK	Clark, Crawford, Dubois, Floyd, Harrison, Jefferson and 4 more	3 hr

Nearby

Severe Thunderstorm Warnings in Indiana, 2017 Every severe thunderstorm warning in 2017

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.