Alert archive / Kentucky / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 29, NWS Louisville, KY

May 4, 2021Washington County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at May 4, 2021, 8:36 PM EDT for Washington County, Kentucky. It was in force for 24 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: May 4, 2021, 8:36 PM EDT (00:36 UTC)
Expired: May 4, 2021, 9:00 PM EDT
In force: 24 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Washington County, KY

The radar

The Louisville radar (KLVX), 80 km from the middle of the area, began a volume at 00:36 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 00:00Z, 0.6 hours before the alert went out and 218 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: 539 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 815 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 244 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted.

490 
WUUS53 KLMK 050036
SVRLMK
KYC229-050100-
/O.NEW.KLMK.SV.W.0029.210505T0036Z-210505T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
836 PM EDT Tue May 4 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Southeastern Washington County in central Kentucky...

* Until 900 PM EDT.

* At 836 PM EDT, a severe thunderstorm was located over Springfield,
  moving east at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Springfield, Mackville, Rineltown, Thompsonville, Texas,
  Pottsville, Briartown and Jenkinsville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 3764 8503 3765 8525 3772 8525 3778 8501
TIME...MOT...LOC 0036Z 262DEG 25KT 3769 8522 

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

EBW

1 follow-up statement

256 
WWUS53 KLMK 050059
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
859 PM EDT Tue May 4 2021

KYC229-050109-
/O.EXP.KLMK.SV.W.0029.000000T0000Z-210505T0100Z/
Washington KY-
859 PM EDT Tue May 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WASHINGTON COUNTY
WILL EXPIRE AT 900 PM EDT...
                
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 will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

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 3764 8503 3765 8525 3772 8525 3778 8501
TIME...MOT...LOC 0059Z 262DEG 25KT 3771 8503 

$$

EBW

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 8:09 PM EDT	Special Weather Statement	LMK	Marion, Washington	36 min
May 4, 8:10 PM EDT	Special Weather Statement	LMK	Logan	35 min
May 4, 8:14 PM EDT	Tornado Warning	LMK	Marion, Washington	31 min
May 4, 8:20 PM EDT	Special Weather Statement	LMK	Edmonson, Warren	40 min
May 4, 8:30 PM EDT	Flash Flood Warning	LMK	Barren, Edmonson, Logan, Warren	4 hr
May 4, 8:46 PM EDT	Special Weather Statement	LMK	Larue	29 min
May 4, 8:55 PM EDT	Special Weather Statement	LMK	Mercer	35 min
May 4, 9:02 PM EDT	Special Weather Statement	LMK	Butler	13 min
May 4, 9:08 PM EDT	Special Weather Statement	LMK	Hart	37 min
May 4, 9:14 PM EDT	Special Weather Statement	LMK	Marion	31 min
May 4, 9:18 PM EDT	Severe Thunderstorm Warning	LMK	Larue, Marion, Nelson	27 min
May 4, 9:29 PM EDT	Special Weather Statement	LMK	Jessamine	61 min
May 4, 9:45 PM EDT	Flash Flood Warning	LMK	Butler, Logan	3 hr
May 4, 10:00 PM EDT	Special Weather Statement	LMK	Logan	30 min
May 5, 12:36 AM EDT	Areal Flood Warning	LMK	Butler, Logan	5 hr
May 5, 7:59 AM EDT	River Flood Advisory	LMK	Hart	3 hr
May 5, 10:22 AM EDT	River Flood Advisory	LMK	Hardin, Nelson	16 hr
May 5, 11:26 AM EDT	River Flood Warning	LMK	Hart	7 hr
May 5, 4:08 PM EDT	River Flood Advisory	LMK	Bourbon	10 hr

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.