Alert archive / Kentucky / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 109, NWS Louisville, KY

June 10, 2018Grayson County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jun 10, 2018, 12:26 PM CDT for Grayson County, Kentucky. It was in force for 34 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: Jun 10, 2018, 12:26 PM CDT (17:26 UTC)
Expired: Jun 10, 2018, 1:00 PM CDT
In force: 34 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Grayson County, KY

The radar

The Louisville radar (KLVX), 67 km from the middle of the area, began a volume at 17:28 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

Nashville Metro, TN (KBNA), launched 12:00Z, 5.4 hours before the alert went out and 150 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: 78 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1266 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 3 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 Jun 10, 11:45 AM CDT, 41 minutes earlier.

Area forecast discussion, Jun 10, 11:45 AM CDT, 41 minutes before

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Hazardous weather outlook, Jun 10, 7:28 AM CDT, 4 hours 58 minutes before

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In the hours before

Special weather statement, Jun 10, 11:23 AM CDT, 1 hour 3 minutes before

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Special weather statement, Jun 10, 11:42 AM CDT, 44 minutes before

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Local storm report, Jun 10, 11:48 AM CDT, 38 minutes before

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Special weather statement, Jun 10, 12:17 PM CDT, 9 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
Jun 10, 11:11 AM CDT	Severe Thunderstorm Warning	LMK	Ohio	34 min
Jun 10, 11:23 AM CDT	Special Weather Statement	LMK	Breckinridge, Meade	37 min
Jun 10, 11:42 AM CDT	Special Weather Statement	LMK	Ohio	33 min
Jun 10, 11:51 AM CDT	Severe Thunderstorm Warning	LMK	Grayson, Ohio	24 min
Jun 10, 11:55 AM CDT	Severe Thunderstorm Warning	LMK	Breckinridge, Grayson	35 min
Jun 10, 12:17 PM CDT	Special Weather Statement	LMK	Butler	28 min
Jun 10, 12:49 PM CDT	Special Weather Statement	LMK	Hardin	11 min
Jun 10, 1:19 PM CDT	Special Weather Statement	LMK	Barren	26 min
Jun 10, 1:45 PM CDT	Special Weather Statement	LMK	Barren	30 min
Jun 10, 2:51 PM CDT	Special Weather Statement	LMK	Logan, Simpson	24 min
Jun 10, 2:52 PM CDT	Areal Flood Advisory	LMK	Logan, Simpson	113 min
Jun 10, 2:55 PM CDT	Special Weather Statement	LMK	Anderson	35 min
Jun 10, 3:26 PM CDT	Special Weather Statement	LMK	Anderson, Mercer, Washington	34 min
Jun 10, 3:49 PM CDT	Areal Flood Advisory	LMK	Anderson, Boyle, Garrard, Jessamine, Madison, Mercer and 2 more	3 hr
Jun 10, 3:55 PM CDT	Special Weather Statement	LMK	Boyle, Garrard, Jessamine, Mercer	65 min
Jun 10, 4:14 PM CDT	Special Weather Statement	LMK	Lincoln	31 min
Jun 10, 4:49 PM CDT	Special Weather Statement	LMK	Casey, Garrard, Lincoln	56 min
Jun 10, 2:20 PM CDT	Areal Flood Advisory	LMK	Harrison, Orange, Washington	115 min
Jun 10, 5:01 PM CDT	Special Weather Statement	LMK	Orange, Scott, Washington	44 min
Jun 10, 6:06 PM CDT	Areal Flood Advisory	LMK	Dubois	3 hr

Nearby

Severe Thunderstorm Warnings in Kentucky, 2018 Every severe thunderstorm warning in 2018

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.