EF1 Tornado — Logan, Kentucky

2025-05-16 · near Danby, Logan, Kentucky

Event narrative

At approximately 9:55 PM CDT on May 16, 2025, a

tornado touched down on Lewisburg Rd, just to the east of US

Highway 431. The tornado touched down as an EF-0, producing minor

tree damage to a residence on Lewisburg Road. It continued eastward

rapidly, crossing Hidden Valley Road and following nearly parallel

to Cates Bypass Road. It produced EF-0 damage to an outdoor shed

near a single residence on Newtown Road, tossing debris into a

field to the east. The tornado began to strengthen as it churned

toward W H Brown Road, which is where EF-1 damage was observed. The

tornado damaged a small metal garage structure, completely

lifting the entire roof off of the structure. As the tornado

continued eastward, it caused minor shingle damage to a single

home on W H Brown Road. Another 150 yards to the east, the tornado

caused more roof damage to a farm building, peeling off some

metal roof panels and scattering them across a field to the north

and east. The EF-1 tornado slightly strengthened as it crossed

the field, with an estimated maximum width of 75 yards as it tore

through another residence at the end of W H Brown Road. The tornado

reached its peak strength at this location and caused the

collapse of the exterior walls of a large farm building,

resulting in the structure falling in on itself. Next to the

collapsed structure, a small open-sided structure with a roof

slid on the ground an estimated 40 feet to the northeast from its

original spot. Another small farm structure next to the collapsed

building was completely destroyed as the tornado spun into the

field, but recent street view imagery revealed this structure was

once open on 3 sides, and appeared to be some sort of car port.

After spinning through the field, the tornado cut through a tree

line and crossed Town Branch creek. The tornado weakened to EF-

0 strength as it crossed a field and approached Concord Road. It

continued as an EF-0 as it crossed Morgantown Road near US Highway

68. Additional tree damage was observed just east of Morgantown

Road, but the tornado lifted shortly afterwards in a field between

the two major roadways.

Wider weather episode

A strong storm system moved across the central and eastern United States from May 16th into May 17th, producing a significant severe weather event across the Mississippi and Ohio Valley. An unusually deep closed upper low slowly moved across the upper Midwest on the 16th, with strong mid- and upper-level southwest flow overspreading the Mississippi and Ohio Valley. The upper low pressure system brought a surface cold front into the Mississippi Valley by the morning of May 16th, with the front stalling out over the region until clearing to the east by the morning hours of May 17th. Ahead of the cold front, a typically unstable late spring air mass was present, with temperatures in the 80s and dewpoint temperatures in the upper 60s and lower 70s. The combination of strong wind shear for mid-May and a moist, unstable environment set the stage for severe weather across central Kentucky and southern Indiana.

During the early morning hours on May 16th, discrete cells, some supercellular, began to develop along the Ohio River and across central Kentucky. These cells were assisted by a 35 knot southwesterly low-level jet, which provided enough instability via low-level moisture transport for convection to initiate. Most of the morning convection was elevated, with between 2000-3000 J/kg of most unstable parcel CAPE present above a relatively stable boundary layer. Given the strong flow aloft, effective bulk shear was strong, around 55-60 kt, supporting organized multicell and supercell clusters. For the first wave of storms which moved across central Kentucky during the morning hours, large hail was the primary severe threat, with several reports of quarter to ping pong ball sized hail reported in severe storms. By later in the morning, isolated wind damage was also observed with severe storms across south central Kentucky. The first wave of storms continued until around midday, with a lull in activity occurring through the late afternoon hours.

During the early and mid-afternoon hours, breaks in cloud cover allowed for additional destabilization to occur, with temperatures warming into the low 80s and dewpoint temperatures in the low 70s ahead of the second wave of severe storms. This would support between 3500-4500 J/kg of surface-based CAPE across central Kentucky and extending into southern Indiana, setting up quite an unstable environment. Wind shear values were also extremely high ahead of the second wave of storms, with 60-70 knots of effective bulk shear noted in mesoanalysis data. Strong low-level wind shear and helicity were also present, with the parameter space supporting significant threats from damaging winds, hail, and tornadoes. The second wave of storms began as a broken line of supercells across Missouri, which moved into western and central Kentucky during the early evening hours. A dominant lead supercell moved across south central Kentucky, producing significant wind damage and up to baseball sized hail as it tracked from Logan and Butler County across to Russell County. As the supercell moved across Russell County, rotation aloft within the cell translated to the ground, with the storm producing a strong tornado which produced up to EF3 damage in eastern Russell County before tracking for nearly 60 miles across southeastern Kentucky, with maximum damage of EF4 strength near London. Additional supercells farther to the north also produced isolated wind damage and hail. By the late evening hours, supercells across western Kentucky and southern Illinois merged into a squall line as it moved over central Kentucky, producing larger swaths of wind damage with several reports of over 60 mph winds. A spin-up tornado was also observed with this line over Logan County, producing EF1 damage. The line of severe storms finally pushed into eastern Kentucky during the early morning hours on May 17th, bringing an end to the severe weather threat.

View location on OpenStreetMap → (36.8719, -86.9110)

Source: NOAA Storm Events Database, event_id 1263479. Narrative written by the NWS forecast office that issued the report.