Tornadoes:

Tornado - HODGENVILLE LARUE COUNTY, KENTUCKY Date March 25, 2021 Time (Local) 10:44 PM EDT EF Rating EF-1 Est. Peak Winds 100 mph Path Length 4.7 miles Max Width 75 yards Injuries/Deaths 0/0 Summary: The National Weather Service in conjunction with Larue County Emergency Management went on a lengthy storm damage survey across northeast LaRue County.  A bow echo moving at over 50 mph produced sporadic straight-line wind damage with a distinct tornadic path, primarily along Slack Rd in the Roanoke community. The tornado touched down about a half mile west of 1598 Carter Brothers Road. Aerial photography from a NOAA NWS drone shows distinct swirls along several farmers' properties with damage to a half dozen barns and numerous uprooted and snapped trees. Cedar trees were the most common tree that sustained damage during this tornado.  At 1598 Carter Brothers Rd, a riding lawn mower was thrown about 50 yards and their garbage can flew 150 yards. There were also trees facing in nearly every direction that were snapped, twisted, or uprooted. Winds at this location were between 90 and 95 miles an hour.  There were indications that this was an intermittent skipping tornado. Along Dan Dunn Rd several barns sustained significant roof and sidewall damage, and a 50ft by 50ft chain link fence was bent at 90 degrees along every support post. The most significant damage of the tornado path was found at 3000 Slack Rd. It destroyed two barns and did significant roof and side damage to a well-built one-story residential home. Insulation and metal siding were thrown in multiple directions. At the end of their property, aerial drone photography showed trees going in nearly every direction. Wind speeds in this location were estimated to be 100 mph. Residents at the house said they could feel the intense pressure and everything trying to suck out of the house.  On the way to the next storm damage survey we found sporadic straight line wind damage in Hardin County. This included three mobile homes near the Hardin County Fairgrounds sustaining roof damage.  The National Weather Service would like to thank the Larue County emergency management agency for helping with the storm damage survey. Track Map Downloadable KMZ File

Tornado - CLARKSON GRAYSON COUNTY, KENTUCKY Date March 25, 2021 Time (Local) 9:16 PM CDT EF Rating EF-0 Est. Peak Winds 85 mph Path Length 1 mile Max Width 40 yards Injuries/Deaths 0/0 Summary:   The National Weather Service conducted a storm damage assessment survey for storms late Thursday evening across northeastern Grayson County.  A bow echo passed through Grayson County and quickly spun up just south of Clarkson. It dropped a very brief tornado at 3900 Millerstown Road. A large 30ft x 40ft garage was mostly destroyed, and a large beam from the garage was thrown into the sidewall of the home residence adjacent to the garage. The house also sustained some minor roof, siding, and gutter damage.  Across the street, a one-story family residence sustained roof and shingle damage with one of the front windows blown out.  Debris from the garage and one-story family residence was thrown up to a quarter-mile eastward into the forest. There were a couple of snapped and uprooted trees in the forest, but the most impressive damage was just beyond the small wooded area where a very noticeable ground grinding swirl could be seen across the farmers field measuring approximately 40 yards wide, which was seen very clearly from NWS aerial drone.  There were no signs of any damage beyond the farmers field, where the swirls ended abruptly. Track Map Downloadable KMZ File

Tornado - ROSINE OHIO COUNTY, KENTUCKY Date March 25, 2021 Time (Local) 8:32 PM CDT EF Rating EF-0 Est. Peak Winds 85 mph Path Length 0.7 miles Max Width 50 yards Injuries/Deaths 0/0 Summary:   The National Weather Service conducted a storm damage assessment survey in Ohio County from the storms that pushed through late Thursday evening. A bow echo structure created a very brief spin up tornado in the Rosine community in eastern Ohio County.  The tornado touched down about 200 yards west of the Dollar General store. The tornado did some minor roof damage to the Dollar General store, along with the snapping and uprooting of a few trees. Drone imagery more clearly saw the trees pointing in multiple directions. Winds in this area were estimated between 75 and 80 mph.  The tornado was very intermittent as it moved to the east-northeast, with more substantial damage along State Highway 1544 in Rosine. Several homes received shingle damage, along with snapped and uprooted trees.  A large RV protective carport was picked up and thrown about 50 yards and subsequently sheared off a telephone pole. One single wide mobile home was pushed off of its cinder block foundation to the southwest about 7 feet. Another mobile home sustained roof damage, and there was also significant rock and mud spatter against three sides of the mobile home. Winds were estimated to be a maximum of 85 mph in this area with a width of 50 yards.  There were a number of cedar trees sheared off half way up the trees. Metal siding was thrown downwind up to 500 yards into the forest. The tornado lifted shortly after hitting those mobile homes.  Track Map Downloadable KMZ File

The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:

EF0 Weak 65-85 mph	EF1 Moderate 86-110 mph	EF2 Significant 111-135 mph	EF3 Severe 136-165 mph	EF4 Extreme 166-200 mph	EF5 Catastrophic 200+ mph

Wind & Hail:

Wind

Straight line wind damage in Allen County, KY (Photo Credits: Matt Pedigo)	Straight line wind damage in Allen County, KY (Photo Credits: Matt Pedigo)	Straight line wind damage in Allen County, KY (Photo Credits: Matt Pedigo)

Hail

Hailstones in Spencer County, KY (Photo Credits: Rebecca Goff)

Photos & Video

LaRue County, KY EF-1 Tornado Damage

Drone photo of property damage left by an EF-1 tornado in LaRue County, KY (NWS Storm Survey)	Additional drone footage from LaRue County, KY (NWS Storm Survey)	Additional drone footage from LaRue County, KY (NWS Storm Survey)	Additional drone footage from LaRue County, KY (NWS Storm Survey)

Grayson County, KY EF-0 Tornado Damage

Drone photo of ground swirls created by EF-0 tornado in Grayson County, KY (NWS Storm Survey)	Additional drone footage from Grayson County, KY (NWS Storm Survey)	Additional drone footage from Grayson County, KY (NWS Storm Survey)	Additional drone footage from Grayson County, KY (NWS Storm Survey)

Ohio County, KY EF-0 Tornado Damage

Drone photo of property damage done by an EF-0 tornado in Ohio County, KY (NWS Storm Survey)	Additional drone footage from Ohio County, KY (NWS Storm Survey)	Additional drone footage from Ohio County, KY (NWS Storm Survey)

Ground Swirls from EF-0 Tornado in Grayson County, KY 

Radar

LaRue County, KY EF-1 Tornado

4-panel radar imagery showing clockwise from upper left: Reflectivity (Z), Velocity (V), Differential Reflectivity (ZDR), and Correlation Coefficient (CC). The most notable feature here is the circulation evident on V, which is coincident with a weak Tornadic Debris Signature (TDS) on CC.

Grayson County, KY EF-0 Tornado

4-panel radar imagery showing clockwise from upper left: Reflectivity (Z), Velocity (V), Differential Reflectivity (ZDR), and Correlation Coefficient (CC). Again, the most notable feature is the circulation evident on V, which is coincident with a weak Tornadic Debris Signature (TDS) on CC.

Ohio County, KY EF-0 Tornado

4-panel radar imagery showing clockwise from upper left: Reflectivity (Z), Velocity (V), Differential Reflectivity (ZDR), and Correlation Coefficient (CC). Tornadic features on this image are less evident, but subtle circulation can be seen on V that is coincident with a weak hook on Z.

Radar Animation of Entire Event

Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LOUISVILLE KY
426 AM EDT SAT MAR 27 2021

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

0608 PM     TSTM WND DMG     2 ENE RAPIDS            36.68N 86.43W
03/25/2021                   SIMPSON            KY   EMERGENCY MNGR   

            REPORT OF MULTIPLE TREES DOWN IN THE AREA OF 
            LEO BINION RD. AND PLEASANT HILL RD. 

0609 PM     TSTM WND DMG     2 NE MT. ARIEAL         36.77N 86.35W
03/25/2021                   ALLEN              KY   PUBLIC           

            VIA PHOTO, WILLOW TREE UPROOTED AND CRUSHES 
            SHED ALONG WITH BRADFORD PEAR UPROOTED ON 
            PROPERTY. 

0611 PM     TSTM WND DMG     1 E MT. ARIEAL          36.75N 86.36W
03/25/2021                   ALLEN              KY   BROADCAST MEDIA  

            PHOTO SHOWS BROKEN CEDAR TRUNK ON THE WEST 
            SIDE OF KY 585 WITH THE TOPS ON THE EAST 
            SIDE OF THE ROAD, JUST NORTH OF THE KY1332 
            INTERSECTION. 

0613 PM     TSTM WND DMG     2 N HALFWAY             36.83N 86.29W
03/25/2021                   ALLEN              KY   PUBLIC           

            REPORTS OF TREES DOWN AS WELL AS A POWER 
            POLE. DAMAGE TO ROOF ON THE RESIDENCE PORCH 
            AND MID-SECTION OF THE HOME. POWER METER 
            FOUND OFF HOME IN THE YARD AND DAMAGED. 

0613 PM     TSTM WND DMG     1 SE MT. ARIEAL         36.74N 86.37W
03/25/2021                   ALLEN              KY   BROADCAST MEDIA  

            PHOTOS SHOW DAMAGE TO A METAL ROOF ON A BARN 
            AND LIGHTLY CONSTRUCTED TUNNEL GREENHOUSES 
            FLATTENED AND DESTROYED. 

0614 PM     TSTM WND DMG     3 SE CLAYPOOL           36.87N 86.22W
03/25/2021                   ALLEN              KY   BROADCAST MEDIA  

            REPORT WITH PHOTO OF A TREE DOWN ON A HOME 
            IN NORTHWESTERN ALLEN COUNTY. 

0629 PM     TSTM WND DMG     2 W PARK CITY           37.09N 86.09W
03/25/2021                   EDMONSON           KY   PUBLIC           

            REPORTS OF CEDAR TREES DOWN ACROSS 31W 
            BLOCKING THREE LANES AND REPORTS OF TWO 
            BUILDINGS DAMAGED. 

0636 PM     HAIL             3 E MAMMOTH CAVE        37.19N 86.04W
03/25/2021  E0.70 INCH       HART               KY   PUBLIC           

            1 TO 2 MINUTES OF INTENSE DIME SIZE HAIL. 

0642 PM     TSTM WND DMG     2 E KESSINGER           37.30N 85.94W
03/25/2021                   HART               KY   BROADCAST MEDIA  

            ROOF LOSS ON A BARN NEAR MT. BEULAH. TIME 
            BASED ON RADAR IMAGERY. 

0718 PM     HAIL             4 NNE BOSTON            37.83N 85.63W
03/25/2021  M1.00 INCH       NELSON             KY   PUBLIC           

            QUARTER SIZED HAIL FROM NWS EMPLOYEE FAMILY 
            MEMBER ON HURRICANE HILLS LAKE. 

0720 PM     HAIL             DEATSVILLE              37.90N 85.56W
03/25/2021  E1.00 INCH       NELSON             KY   PUBLIC           

            PHOTO OF ESTIMATE 1 INCH HAIL OUT OF 
            DEATSVILLE. 

0723 PM     TSTM WND DMG     COXS CREEK              37.90N 85.47W
03/25/2021                   NELSON             KY   PUBLIC           

            LARGE TREE BRANCH CAME DOWN AND DESTROYED A 
            TRAMPOLINE. TIME BASED ON RADAR DATA. 

0738 PM     HAIL             3 NW ELK CREEK          38.13N 85.40W
03/25/2021  E1.50 INCH       SPENCER            KY   PUBLIC           

            GOLF BALL SIZED HAIL REPORTED ON BATTERY LN. 

0745 PM     HAIL             1 ENE SIMPSONVILLE      38.22N 85.34W
03/25/2021  E1.00 INCH       SHELBY             KY   BROADCAST MEDIA  

            PHOTO VIA SOCIAL MEDIA OF QUARTER SIZE HAIL 
            NEAR SIMPSONVILLE. 

0750 PM     HAIL             1 SSE SIMPSONVILLE      38.20N 85.35W
03/25/2021  E1.75 INCH       SHELBY             KY   PUBLIC           

            GOLF BALL SIZED HAIL REPORTED AT 750 PM EDT 
            AT CULVERS NEAR THE OUTLET SHOPPES OF THE 
            BLUEGRASS ALONG I-64. 

0932 PM     TORNADO          ROSINE                  37.45N 86.75W
03/25/2021                   OHIO               KY   NWS STORM SURVEY 

            SHORT-LIVED EF-0 TORNADO WAS ON THE GROUND 
            FOR 0.7 MILES WITH A MAXIMUM WIDTH OF 50 
            YARDS AS IT TRAVELED EAST NORTHEAST. MINOR 
            ROOF DAMAGE TO A DOLLAR GENERAL STORE ALONG 
            WITH SNAPPING/UPROOTING OF A FEW TREES. MORE 
            SUBSTANTIAL DAMAGE DONE ON 1544 IN ROSINE, 
            WHERE SEVERAL HOMES RECEIVED SHINGLE DAMAGE 
            ALONG WITH MORE SNAPPED/UPROOTED TREES. ALSO 
            HAD SOME MOBILE HOME DAMAGE. 

0943 PM     TSTM WND DMG     BEAVER DAM              37.41N 86.88W
03/25/2021                   OHIO               KY   COUNTY OFFICIAL  

            ONE SNAPPED POWER POLE IN THE BEAVER DAM 
            AREA. 

1005 PM     TSTM WND DMG     1 NW LEITCHFIELD        37.49N 86.30W
03/25/2021                   GRAYSON            KY   FIRE DEPT/RESCUE 

            SHINGLES REMOVED FROM ROOF, DAMAGE TO 
            OUTBUILDING. 

1015 PM     TSTM WND DMG     4 E CLARKSON            37.48N 86.15W
03/25/2021                   GRAYSON            KY   FIRE DEPT/RESCUE 

            ROOF OFF HOUSE AND WINDOWS BLOWN OUT. 
            ATTACHED GARAGE DAMAGED. OUTBUILDING 
            DAMAGED. OLD BARN DAMAGED. POWER LINES AND 
            POLES DOWN. 

1016 PM     TSTM WND DMG     4 S BIG CLIFTY          37.50N 86.15W
03/25/2021                   GRAYSON            KY   FIRE DEPT/RESCUE 

            SEVERAL LARGE TREES DOWN. 

1016 PM     TORNADO          4 ESE CLARKSON          37.48N 86.16W
03/25/2021                   GRAYSON            KY   NWS STORM SURVEY 

            1 MILE LONG EF-0 TORNADO WITH MAXIMUM WIDTH 
            OF 40 YARDS. BRIEF TORNADO THAT CAUSED 
            DAMAGE IN THE 3900 BLOCK OF MILLERSTOWN 
            ROAD. ALSO OF INTEREST WAS A VERY NOTICEABLE 
            GROUND SWIRL...FROM DRONE FOOTAGE...IN OPEN 
            FARMLAND. 

1018 PM     TSTM WND DMG     5 NW MILLERSTOWN        37.48N 86.13W
03/25/2021                   GRAYSON            KY   UTILITY COMPANY  

            NUMEROUS POWER OUTAGES IN THE MILLERSTOWN 
            AREA OF GRAYSON COUNTY. 

1030 PM     TSTM WND DMG     2 NW LEITCHFIELD        37.50N 86.31W
03/25/2021                   GRAYSON            KY   TRAINED SPOTTER  

            LARGE TREE ON HOUSE ABOUT ALONG HIGHWAY 737 
            WEST OF LEITCHFIELD. 

1035 PM     TSTM WND DMG     3 ENE GLENDALE          37.61N 85.86W
03/25/2021                   HARDIN             KY   BROADCAST MEDIA  

            BROADCAST MEDIA REPORTED DAMAGE TO A HOUSE 
            (ROOF BLOW AWAY) AND HEAVY DAMAGE TO A 
            MOBILE HOME BOTH ALONG FIRST UNION CHURCH 
            RD. TIME ESTIMATED FROM RADAR. 

1044 PM     TORNADO          3 NE TONNIEVILLE        37.63N 85.76W
03/25/2021                   LARUE              KY   NWS STORM SURVEY 

            4.5 MILE LENGTH EF-1 TORNADO. MAXIMUM WIDTH 
            75 YARDS. DRONE FOOTAGE SHOWED DISTINCT 
            SWIRLS ON FARMLAND. SEVERAL STRUCTURES WERE 
            DAMAGED ALONG THE PATH AS WELL AS NUMEROUS 
            UPROOTED/SNAPPED TREES. MOST SIGNIFICANT 
            DAMAGE IN THE 3000 BLOCK OF SLACK ROAD WHERE 
            TWO BARNS WERE DESTROYED AND SIGNIFICANT 
            ROOF DAMAGE OCCURRED AT A WELL-BUILT ONE 
            STORY RESIDENCE. 

1045 PM     TSTM WND DMG     3 NE TONNIEVILLE        37.63N 85.76W
03/25/2021                   LARUE              KY   911 CALL CENTER  

            SEVERAL DAMAGE REPORTS FROM CARTER BROTHERS 
            ROAD EAST TO SHEPHERDSVILLE ROAD AND THEN 
            CONTINUING TO DAN DUN ROAD, SPENCER SCHOOL 
            ROAD, AND INTERSECTION OF CISSAL HILL ROAD 
            AND ROANOKE ROAD. AT LEAST 2 BUILDINGS WITH 
            LOTS OF DAMAGE, ONE COLLAPSED. SEVERAL TREES 
            DOWN AND A FEW POLES DOWN. A FEW OTHER 
            STRUCTURES DAMAGED. TIME OF INITIAL DAMAGE 
            ESTIMATED FROM RADAR. 

1050 PM     TSTM WND DMG     4 WSW LYONS             37.67N 85.69W
03/25/2021                   LARUE              KY   911 CALL CENTER  

            APPROXIMATE END POINT OF DAMAGE MENTIONED IN 
            PREVIOUS REPORT. TIME ESTIMATED FROM RADAR. 

1135 PM     TSTM WND DMG     2 NNW CANAAN            38.90N 85.31W
03/25/2021                   JEFFERSON          IN   911 CALL CENTER  

            8 INCH DIAMETER TREE DOWN ON THE ROAD NEAR 
            THE INTERSECTION OF JEFFERSON AND LEMON 
            ROADS. ALSO CLEARING A TREE ON SR 62 NEAR 
            CHINAVILLE ROAD. TIME ESTIMATED BASED ON 
            RADAR. 

1135 PM     NON-TSTM WND GST 2 N JOHNSBURG           38.25N 86.95W
03/25/2021  M51 MPH          DUBOIS             IN   ASOS             

            REPORTED AT HUNTINGBURG AIRPORT. 

1145 PM     TSTM WND DMG     GEORGETOWN              38.21N 84.55W
03/25/2021                   SCOTT              KY   AMATEUR RADIO    

            CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 
            GEORGETOWN. LARGE TREE DOWN ACROSS 
            WARRENDALE AVE. NO DAMAGE TO STRUCTURES OR 
            POWERLINES REPORTED. 

1207 AM     NON-TSTM WND GST 6 W LEXINGTON           38.04N 84.61W
03/26/2021  M48 MPH          FAYETTE            KY   ASOS             

            REPORTED AT KLEX. 

.

Environment

Synoptic Overview

Figure 1: 300mb upper air chart 00Z March 26, 2021	Figure 2: 500mb upper air chart 00Z March 26, 2021	Figure 3: 850mb upper air chart 00Z March 26, 2021	Figure 4: WPC's 00Z Surface Analysis March 26, 2021

Near-storm Environment

Figure 5: Surface Based CAPE 00Z March 26, 2021	Figure 6: 0-1km Storm Relative Helicity (SRH) 00Z March 26, 2021	Figure 7: Supercell Composite Parameter (SCP) 00Z March 26, 2021	Figure 8: Significant Tornado Parameter 00Z March 26, 2021

Additional environmental data.

Figure 9: Upper Air Sounding from Nashville, TN (BNA) 21Z March 25, 2021