Alert archive / Indiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 27, NWS Louisville, KY

April 12, 2019Jefferson County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Apr 12, 2019, 6:42 AM EDT for Jefferson County, Indiana. It was in force for 18 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 12, 2019, 6:42 AM EDT (10:42 UTC)
Expired: Apr 12, 2019, 7:00 AM EDT
In force: 18 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Jefferson County, IN

The radar

The Louisville radar (KLVX), 100 km from the middle of the area, began a volume at 10:41 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 00:00Z, 10.7 hours before the alert went out and 159 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: 2359 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 191 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 12, 6:37 AM EDT, 5 minutes earlier.

Area forecast discussion, Apr 12, 6:37 AM EDT, 5 minutes before

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Hazardous weather outlook, Apr 12, 3:48 AM EDT, 2 hours 54 minutes before

Hazardous Weather Outlook
National Weather Service Louisville KY
348 AM EDT Fri Apr 12 2019

INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067-
070>078-081-082-130800-
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
348 AM EDT Fri Apr 12 2019 /248 AM CDT Fri Apr 12 2019/

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

.DAY ONE...Today and Tonight.

A band of showers with a few isolated storms will push through the
outlook area this morning. No organized severe weather is expected,
but the showers could contain gusty winds and brief heavy rainfall.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Another storm system will bring showers and thunderstorms to the
region late Saturday and into Sunday. Some of the storms on Sunday
could be strong to severe with damaging winds being the primary
severe weather risk.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested on Sunday.

MJ/CG

In the hours before

Special weather statement, Apr 12, 6:05 AM EDT, 37 minutes before

Special Weather Statement
National Weather Service Louisville KY
605 AM EDT FRI APR 12 2019

INZ090-KYZ025-028>030-121030-
Harrison-Jefferson-Bullitt-Meade-Hardin-
605 AM EDT FRI APR 12 2019

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN HARRISON...
SOUTHEASTERN MEADE...JEFFERSON...NORTH CENTRAL HARDIN AND
NORTHWESTERN BULLITT COUNTIES...

At 605 AM EDT, a strong thunderstorm was located near Brandenburg,
moving northeast at 60 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Louisville, Jeffersonville, Jeffersontown, St. Matthews, Shively,
Shepherdsville, Lyndon, Hurstbourne, Graymoor-Devondale and
Brandenburg.

LAT...LON 3833 8564 3810 8546 3781 8614 3797 8626
      3827 8575 3829 8568
TIME...MOT...LOC 1005Z 237DEG 52KT 3794 8613

MJ

Special weather statement, Apr 12, 6:13 AM EDT, 29 minutes before

Special Weather Statement
National Weather Service Louisville KY
613 AM EDT FRI APR 12 2019

KYZ047-048-054>057-066-067-121045-
Boyle-Mercer-Jessamine-Marion-Lincoln-Madison-Garrard-Casey-
613 AM EDT FRI APR 12 2019

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN LINCOLN...
SOUTHEASTERN MERCER...NORTHWESTERN GARRARD...EASTERN MARION...
SOUTHERN JESSAMINE...BOYLE...WEST CENTRAL MADISON AND NORTH CENTRAL
CASEY COUNTIES...

At 612 AM EDT, a strong thunderstorm was located 10 miles north of
Liberty, moving northeast at 55 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Nicholasville, Danville, Stanford, Lancaster, Mccreary, Wilmore,
Junction City, Burgin, Hustonville and Peytons Store.

LAT...LON 3735 8492 3747 8508 3791 8465 3773 8440
TIME...MOT...LOC 1012Z 222DEG 46KT 3747 8494

MJ

Special weather statement, Apr 12, 6:15 AM EDT, 27 minutes before

Special Weather Statement
National Weather Service Louisville KY
615 AM EDT FRI APR 12 2019

KYZ035>037-039-040-121045-
Scott-Woodford-Franklin-Harrison-Anderson-
615 AM EDT FRI APR 12 2019

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN WOODFORD...SCOTT...
NORTHEASTERN ANDERSON...SOUTHWESTERN HARRISON AND EASTERN FRANKLIN
COUNTIES...

At 615 AM EDT, a strong thunderstorm was located over Lawrenceburg,
moving northeast at 55 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Georgetown, Frankfort, Lawrenceburg, Versailles, Midway, Stamping
Ground, Sadieville, Longlick, Slickway and Alberta.

LAT...LON 3838 8434 3796 8485 3807 8502 3834 8478
      3835 8475 3837 8471 3842 8465 3843 8462
      3849 8456 3850 8453
TIME...MOT...LOC 1015Z 219DEG 49KT 3808 8488

MJ

Special weather statement, Apr 12, 6:26 AM EDT, 16 minutes before

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Local storm report, Apr 12, 6:39 AM EDT, 3 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 12, 6:05 AM EDT	Special Weather Statement	LMK	Jefferson, Meade	25 min
Apr 12, 6:13 AM EDT	Special Weather Statement	LMK	Boyle, Garrard	32 min
Apr 12, 6:15 AM EDT	Special Weather Statement	LMK	Franklin, Scott	30 min
Apr 12, 6:35 AM EDT	Severe Thunderstorm Warning	LMK	Jefferson, Oldham	14 min
Apr 12, 6:47 AM EDT	Severe Thunderstorm Warning	LMK	Oldham	13 min
Apr 12, 6:56 AM EDT	Severe Thunderstorm Warning	LMK	Henry, Oldham, Trimble	19 min
Apr 12, 7:58 AM EDT	Special Weather Statement	LMK	Bourbon, Clark, Fayette, Garrard, Jessamine, Lincoln and 2 more	77 min
Apr 12, 7:59 AM EDT	Severe Thunderstorm Warning	LMK	Lincoln	31 min
Apr 12, 6:26 AM EDT	Special Weather Statement	LMK	Jefferson, Scott	34 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2019 Every severe thunderstorm warning in 2019

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.