Alert archive / Kentucky / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 255, NWS Louisville, KY

July 18, 2023Marion County, Nelson County, Washington County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jul 18, 2023, 3:28 AM EDT for Marion County, Nelson County, Washington County, Kentucky. It was in force for 32 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
Jul 18, 2023, 3:28 AM EDT (07:28 UTC)
Expired
Jul 18, 2023, 4:00 AM EDT
In force
32 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Marion County, KY, Nelson County, KY, Washington County, KY

The radar

The Louisville radar (KLVX), 64 km from the middle of the area, began a volume at 07:28 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 00:00Z, 7.5 hours before the alert went out and 210 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-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2023-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1308 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2023-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1308 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
1604 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

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 Jul 18, 3:05 AM EDT, 23 minutes earlier.

Area forecast discussion, Jul 18, 3:05 AM EDT, 23 minutes before
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Hazardous weather outlook, Jul 18, 3:16 AM EDT, 12 minutes before
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In the hours before

Special weather statement, Jul 18, 1:55 AM EDT, 1 hour 33 minutes before
Special Weather Statement
National Weather Service Louisville KY
155 AM EDT Tue Jul 18 2023

INZ077-180630-
Washington IN-
155 AM EDT Tue Jul 18 2023

...A STRONG THUNDERSTORM WILL IMPACT WASHINGTON COUNTY THROUGH 230 AM
EDT...

At 154 AM EDT, Doppler radar was tracking a strong thunderstorm 13
miles northwest of Salem, moving southeast at 35 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Salem, Blue River, New Pekin, Campbellsburg, Little York, Saltillo,
Kossuth, Smedley, South Boston and Hitchcock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3876 8603 3877 8602 3876 8601 3876 8600
      3875 8598 3874 8589 3858 8588 3850 8592
      3850 8596 3849 8596 3849 8598 3864 8631
      3873 8631 3874 8629 3877 8628 3878 8618
      3876 8613 3877 8610 3878 8610 3878 8609
TIME...MOT...LOC 0554Z 292DEG 29KT 3874 8628

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

CJP
Local storm report, Jul 18, 2:18 AM EDT, 1 hour 10 minutes before
Preliminary Local Storm Report
National Weather Service Louisville KY
218 AM EDT Tue Jul 18 2023

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

0206 AM     Hail             4 SE Pewee Valley       38.27N 85.44W
07/18/2023  E1.00 inch       Jefferson          KY   Public

&&

SRM
Special weather statement, Jul 18, 2:26 AM EDT, 1 hour 2 minutes before
Special Weather Statement
National Weather Service Louisville KY
226 AM EDT Tue Jul 18 2023

KYZ041-048-049-057-180700-
Fayette KY-Jessamine KY-Clark KY-Madison KY-
226 AM EDT Tue Jul 18 2023

...A STRONG THUNDERSTORM WILL IMPACT WESTERN CLARK...JESSAMINE...
NORTHWESTERN MADISON AND SOUTHERN FAYETTE COUNTIES THROUGH 300 AM
EDT...

At 225 AM EDT, Doppler radar was tracking a strong thunderstorm near
Nicholasville, moving east at 45 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Lexington, Nicholasville, Dunbar High School, Veterans Park,
Cadentown, U K Arboretum, Chevy Chase, Fayette Mall, Wilmore and
Chilesburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3780 8421 3781 8468 3783 8468 3782 8472
      3783 8473 3784 8472 3785 8469 3786 8469
      3786 8471 3801 8466 3808 8430 3807 8428
      3807 8427
TIME...MOT...LOC 0625Z 265DEG 38KT 3791 8467

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH

CJP
Special weather statement, Jul 18, 2:32 AM EDT, 56 minutes before
Special Weather Statement
National Weather Service Louisville KY
232 AM EDT Tue Jul 18 2023

KYZ028>030-180700-
Jefferson KY-Bullitt KY-Hardin KY-
232 AM EDT Tue Jul 18 2023

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN JEFFERSON...
NORTHERN HARDIN AND BULLITT COUNTIES THROUGH 300 AM EDT...

At 232 AM EDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Valley Station, moving east at 25 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Shepherdsville, Pioneer Village, Valley Station, Mount Washington,
Lebanon Junction, Hebron Estates, West Point, Fox Chase, Brooks and
Cupio.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3806 8558 3782 8569 3798 8596 3800 8595
      3802 8592 3806 8592 3810 8590
TIME...MOT...LOC 0632Z 287DEG 23KT 3799 8588

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH

CJP
Special weather statement, Jul 18, 3:02 AM EDT, 26 minutes before
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Local storm report, Jul 18, 3:07 AM EDT, 21 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 10:35 PM EDTSpecial Weather StatementLMKNicholas25 min
Jul 17, 10:56 PM EDTSevere Thunderstorm WarningLMKTrimble34 min
Jul 17, 11:54 PM EDTAreal Flood AdvisoryLMKTrimble3 hr
Jul 18, 12:57 AM EDTSevere Thunderstorm WarningLMKJefferson, Oldham, Shelby18 min
Jul 18, 1:20 AM EDTSpecial Weather StatementLMKShelby25 min
Jul 18, 1:52 AM EDTSevere Thunderstorm WarningLMKJefferson, Oldham, Shelby, Spencer25 min
Jul 18, 2:15 AM EDTSevere Thunderstorm WarningLMKShelby18 min
Jul 18, 2:22 AM EDTAreal Flood AdvisoryLMKAnderson, Bourbon, Fayette, Franklin, Jefferson, Oldham and 3 more3 hr
Jul 18, 2:26 AM EDTSpecial Weather StatementLMKFayette, Jessamine34 min
Jul 18, 2:32 AM EDTSpecial Weather StatementLMKBullitt28 min
Jul 18, 2:38 AM EDTSevere Thunderstorm WarningLMKBullitt, Hardin23 min
Jul 18, 2:59 AM EDTSevere Thunderstorm WarningLMKBullitt, Nelson31 min
Jul 18, 3:02 AM EDTSpecial Weather StatementLMKGarrard, Madison43 min
Jul 18, 3:09 AM EDTSevere Thunderstorm WarningLMKFayette, Jessamine, Woodford36 min
Jul 18, 3:32 AM EDTAreal Flood AdvisoryLMKAnderson, Jessamine, Mercer, Woodford2 hr
Jul 18, 3:46 AM EDTSpecial Weather StatementLMKMadison29 min
Jul 18, 3:54 AM EDTSevere Thunderstorm WarningLMKBoyle, Casey, Lincoln36 min
Jul 18, 4:13 AM EDTSpecial Weather StatementLMKCasey47 min
Jul 18, 4:22 AM EDTSevere Thunderstorm WarningLMKCasey, Lincoln38 min
Jul 18, 4:26 AM EDTSpecial Weather StatementLMKGarrard34 min
Jul 18, 5:01 AM EDTSpecial Weather StatementLMKRussell29 min
Jul 18, 10:02 AM EDTSevere Thunderstorm WarningLMKMeade43 min
Jul 18, 10:44 AM EDTSevere Thunderstorm WarningLMKMeade14 min
Jul 18, 12:30 PM EDTSpecial Weather StatementLMKHart30 min
Jul 18, 12:31 PM EDTFlood WatchLMKAllen, Butler, Edmonson, Grayson, Logan, Ohio and 2 more21 hr
Jul 18, 12:57 PM EDTSpecial Weather StatementLMKMeade18 min
Jul 18, 1:09 PM EDTSpecial Weather StatementLMKMetcalfe36 min
Jul 18, 1:14 PM EDTSpecial Weather StatementLMKHardin16 min
Jul 18, 1:20 PM EDTSevere Thunderstorm Warning Considerable damage threatLMKBarren, Green, Hart, Metcalfe40 min
Jul 18, 1:32 PM EDTSpecial Weather StatementLMKBullitt28 min
Jul 18, 1:54 PM EDTSpecial Weather StatementLMKMetcalfe21 min
Jul 18, 1:57 PM EDTSpecial Weather StatementLMKHardin18 min
Jul 18, 2:02 PM EDTSpecial Weather StatementLMKShelby28 min
Jul 18, 2:03 PM EDTSpecial Weather StatementLMKAnderson27 min
Jul 18, 2:17 PM EDTSpecial Weather StatementLMKCasey13 min
Jul 18, 2:28 PM EDTSpecial Weather StatementLMKMercer32 min
Jul 18, 2:30 PM EDTSpecial Weather StatementLMKShelby30 min
Jul 18, 2:33 PM EDTSevere Thunderstorm WarningLMKAdair, Casey, Lincoln42 min
Jul 18, 2:43 PM EDTSevere Thunderstorm WarningLMKGarrard, Jessamine, Mercer, Woodford32 min
Jul 18, 2:54 PM EDTSpecial Weather StatementLMKFayette, Woodford36 min
Jul 18, 3:05 PM EDTSpecial Weather StatementLMKLincoln25 min
Jul 18, 3:10 PM EDTSpecial Weather StatementLMKGarrard35 min
Jul 18, 3:11 PM EDTSpecial Weather StatementLMKClark, Fayette34 min
Jul 18, 3:26 PM EDTSpecial Weather StatementLMKBourbon34 min
Jul 18, 3:35 PM EDTSevere Thunderstorm WarningLMKButler, Logan55 min
Jul 18, 3:37 PM EDTSevere Thunderstorm WarningLMKBourbon, Clark, Madison, Nicholas38 min
Jul 18, 3:53 PM EDTSpecial Weather StatementLMKLarue37 min
Jul 18, 4:13 PM EDTSevere Thunderstorm WarningLMKLarue, Marion, Taylor17 min
Jul 18, 4:15 PM EDTSevere Thunderstorm WarningLMKAllen, Butler, Edmonson, Logan, Simpson, Warren60 min
Jul 18, 5:02 PM EDTSpecial Weather StatementLMKBreckinridge, Hancock28 min
Jul 18, 5:03 PM EDTSpecial Weather StatementLMKAllen, Barren, Edmonson, Hart42 min
Jul 18, 5:27 PM EDTSpecial Weather StatementLMKWashington33 min
Jul 18, 5:36 PM EDTSpecial Weather StatementLMKBreckinridge24 min
Jul 18, 5:37 PM EDTAreal Flood AdvisoryLMKBreckinridge, Hancock, Ohio3 hr
Jul 18, 5:42 PM EDTSevere Thunderstorm WarningLMKMarion, Washington18 min
Jul 18, 5:44 PM EDTSpecial Weather StatementLMKAdair, Cumberland, Green, Hart, Larue, Metcalfe and 2 more46 min
Jul 18, 5:47 PM EDTSpecial Weather StatementLMKMeade28 min
Jul 18, 6:09 PM EDTSevere Thunderstorm WarningLMKJefferson36 min
Jul 18, 6:13 PM EDTSpecial Weather StatementLMKHardin32 min
Jul 18, 6:28 PM EDTSpecial Weather StatementLMKAdair, Casey, Clinton, Cumberland, Larue, Marion and 3 more62 min
Jul 18, 6:31 PM EDTAreal Flood AdvisoryLMKMarion, Nelson, Washington3 hr
Jul 18, 6:39 PM EDTSpecial Weather StatementLMKJefferson36 min
Jul 18, 6:42 PM EDTSevere Thunderstorm WarningLMKBullitt, Jefferson18 min
Jul 18, 7:01 PM EDTFlash Flood WarningLMKMarion, Nelson, Washington3 hr
Jul 18, 7:06 PM EDTAreal Flood AdvisoryLMKJefferson, Oldham, Shelby3 hr
Jul 18, 7:10 PM EDTSpecial Weather StatementLMKBoyle, Garrard35 min
Jul 18, 7:14 PM EDTFlash Flood WarningLMKJefferson, Oldham, Shelby3 hr
Jul 17, 10:41 PM EDTSpecial Weather StatementLMKJefferson34 min
Jul 18, 12:21 AM EDTSevere Thunderstorm WarningLMKWashington24 min
Jul 18, 12:27 AM EDTSpecial Weather StatementLMKClark33 min
Jul 18, 12:45 AM EDTSpecial Weather StatementLMKScott30 min
Jul 18, 1:15 AM EDTSpecial Weather StatementLMKClark45 min
Jul 18, 1:55 AM EDTSpecial Weather StatementLMKWashington35 min
Jul 18, 9:16 AM EDTSpecial Weather StatementLMKClark29 min
Jul 18, 9:50 AM EDTSpecial Weather StatementLMKCrawford25 min
Jul 18, 10:23 AM EDTSpecial Weather StatementLMKHarrison22 min
Jul 18, 10:46 AM EDTSpecial Weather StatementLMKFloyd29 min
Jul 18, 5:51 PM EDTSpecial Weather StatementLMKFloyd24 min
Jul 18, 6:17 PM EDTSpecial Weather StatementLMKHarrison28 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2023Every severe thunderstorm warning in 2023

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.