Alert archive / Kentucky / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 52, NWS Louisville, KY

June 18, 2021Harrison County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jun 18, 2021, 9:56 PM EDT for Harrison 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 outline as issued.

The facts

Issued: Jun 18, 2021, 9:56 PM EDT (01:56 UTC)
Expired: Jun 18, 2021, 10:30 PM EDT
In force: 34 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Harrison County, KY

The radar

The Cincinnati radar (KILN), 117 km from the middle of the area, began a volume at 01:56 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 18, 9:09 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 1.9 hours before the alert went out and 118 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: 2257 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1236 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 214 m²/s²
0-3 km storm-relative helicity: 240 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 17.6

Open this sounding in Storm Lab

The text

As transmitted.

831 
WUUS53 KLMK 190156
SVRLMK
KYC097-190230-
/O.NEW.KLMK.SV.W.0052.210619T0156Z-210619T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
956 PM EDT Fri Jun 18 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Harrison County in central Kentucky...

* Until 1030 PM EDT.

* At 956 PM EDT, a severe thunderstorm was located 7 miles southeast
  of Williamstown, moving southeast at 50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Cynthiana around 1015 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3831 8428 3829 8434 3830 8436 3828 8437
      3828 8443 3838 8446 3843 8453 3849 8455
      3851 8449 3854 8448 3854 8443 3857 8441
      3858 8420 3855 8421 3855 8416 3850 8418
      3850 8416 3849 8417 3848 8413 3846 8410
TIME...MOT...LOC 0156Z 329DEG 42KT 3859 8443 

HAIL...<.75IN
WIND...60MPH
 
$$

CG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 10:03 PM EDT	Special Weather Statement	LMK	Scott	27 min
Jun 18, 10:17 PM EDT	Special Weather Statement	LMK	Nicholas	28 min
Jun 18, 11:20 PM EDT	Special Weather Statement	LMK	Trimble	25 min
Jun 18, 11:27 PM EDT	Severe Thunderstorm Warning	LMK	Trimble	33 min
Jun 18, 11:48 PM EDT	Special Weather Statement	LMK	Henry, Trimble	27 min
Jun 19, 12:22 AM EDT	Flash Flood Warning	LMK	Trimble	6 hr
Jun 19, 12:28 AM EDT	Special Weather Statement	LMK	Henry, Trimble	32 min
Jun 19, 12:48 AM EDT	Special Weather Statement	LMK	Trimble	27 min
Jun 19, 1:05 AM EDT	Flash Flood Warning	LMK	Henry	6 hr
Jun 19, 1:14 AM EDT	Special Weather Statement	LMK	Harrison, Scott	31 min
Jun 19, 1:46 AM EDT	Special Weather Statement	LMK	Bourbon, Fayette, Harrison, Scott	44 min
Jun 19, 1:51 AM EDT	Flash Flood Warning	LMK	Henry	5 hr
Jun 19, 2:28 AM EDT	Areal Flood Advisory	LMK	Franklin, Scott	3 hr
Jun 19, 7:53 AM EDT	Special Weather Statement	LMK	Trimble	37 min
Jun 19, 8:27 AM EDT	Special Weather Statement	LMK	Henry, Jefferson, Oldham	33 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2021 Every severe thunderstorm warning in 2021

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.