Overview
An occluded low pressure system across the Upper Midwest lifted a warm front north through the area on Wednesday, April 17, with convection firing along and just ahead of an approaching cold front towards the west. Rapid air mass recovery occurred in the wake of morning convection, sustained by a 40 to 50-knot southwesterly 700 mb jet punching into the region. The dry air associated with the 700 mb jet was likely associated with large-scale subsidence on the back side of the occluded low across the Upper Midwest. MLCAPE values reached around 1000 J/kg under 40 to 45 knots of bulk layer shear, most of which was contained within the 0-3 km layer. Hodographs were fairly impressive, especially below 700 mb with clockwise-curved profiles, owing to the multiple rotating storms and tornadoes in addition to strong bowing segments. Several tornadoes occurred across the region, including a high-end EF-1 in Bucyrus (Crawford County, OH), a high-end EF-1 in Windham (Portage County), and an EF-0 in Southington and Champion Townships (Trumbull County). |
"Sandwich" (Visible + Infrared) satellite loop overlaid with GLM from roughly 1130 AM to 930 PM on April 17, 2024. |
Tornadoes:
Tornado - Windham, OH
Track Map |
Tornado - Champion Township, OH
Track Map |
Tornado - Bucyrus, OH
Track Map |
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 |
EF-1 Windham, OH Tornado Damage
Collapsed wall of an outbuilding in Windham, OH (NWS Storm Survey) |
House heavily damaged and slightly shifted off of its foundation in Windham, OH (NWS Storm Survey) |
Many trees downed with damage to houses in Windham, OH (NWS Storm Survey) |
Large tree uprooted onto a house in Windham, OH (NWS Storm Survey) |
EF-0 Champion Township, OH Tornado Damage
Large trees snapped in Champion Township, OH (NWS Storm Survey) |
Row of pine trees snapped in Southington Township, OH (NWS Storm Survey) |
Damage to the roof, siding, shutters, and gutters of a house in Champion Township, OH (NWS Storm Survey) |
Collapsed garage in Southington Township, OH (NWS Storm Survey) |
EF-1 Bucyrus, OH Tornado Damage
House shifted off of its foundation in Bucyrus, OH (NWS Storm Survey) |
Large trees snapped in Bucyrus, OH (NWS Storm Survey) |
Roof damage to a building in downtown Bucyrus, OH (NWS Storm Survey) |
Large tree uprooted and damage to houses in Bucyrus, OH (NWS Storm Survey) |
Radar
Regional radar loop of the line of strong to severe thunderstorms that swept across the region ahead of the cold front during the afternoon and evening. Embedded supercells produced several tornadoes, as well as pockets of straight line wind damage. | Radar screen capture of the Windham tornado at 6:47 PM. Pictured are reflectivity (top left), velocity (top right), correlation coefficient with a TDS signature present (bottom left), and normalized rotation (bottom right). |
Storm Reports
Preliminary Local Storm Report...Summary National Weather Service Cleveland OH 1256 PM EDT Fri Apr 19 2024 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0401 PM Tstm Wnd Dmg 2 ENE Marion 40.59N 83.09W 04/17/2024 Marion OH 911 Call Center Power lines down near the intersection of University Drive and 309. Time estimated via radar. 0518 PM Tstm Wnd Dmg 4 WSW Shreve 40.67N 82.09W 04/17/2024 Holmes OH 911 Call Center Tree downed in Big Prairie. Delayed report. Time estimated via radar. 0530 PM Tstm Wnd Dmg Killbuck 40.50N 81.98W 04/17/2024 Holmes OH 911 Call Center Delayed report of tree downed in Killbuck. Time estimated via radar. 0530 PM Tstm Wnd Dmg Millersburg 40.56N 81.92W 04/17/2024 Holmes OH 911 Call Center Delayed report of tree downed in Millersburg. Time estimated via radar. 0646 PM Tstm Wnd Dmg 2 W Windham 41.23N 81.08W 04/17/2024 Portage OH 911 Call Center Tree down on State Route 303. 0406 PM Tstm Wnd Gst 4 NE Marion 40.62N 83.07W 04/17/2024 M64 MPH Marion OH ASOS ASOS station KMNN Marion. 0606 PM Tstm Wnd Gst 3 N Cleveland 41.52N 81.68W 04/17/2024 M66 MPH Cuyahoga OH ASOS ASOS station KBKL Cleveland. 0535 PM Tstm Wnd Gst 2 SW Millersburg 40.53N 81.95W 04/17/2024 M61 MPH Holmes OH AWOS AWOS station K10G 2 WSW Millersburg. 0451 PM Tstm Wnd Dmg 2 ESE Bellville 40.61N 82.47W 04/17/2024 Richland OH Amateur Radio Multiple trees down on Route 97 between Butler and Bellville. One and a half foot in diameter trees snapped about 3 feet above ground. Time estimated via radar. 0330 PM Tstm Wnd Gst 9 ENE Oregon 41.70N 83.26W 04/17/2024 M52 MPH LEZ142 OH C-Man Station C-MAN Station TWCO1 8 ENE Oregon gust to 52 mph/45 knots. 0645 PM Tstm Wnd Dmg 2 WNW Windham 41.24N 81.07W 04/17/2024 Portage OH Dept of Highways Report of at least one tractor trailer blown over on eastbound lanes of Ohio Turnpike (I-80) beyond State Route 44. Time estimated via radar. 0408 PM Tstm Wnd Dmg Bucyrus 40.81N 82.98W 04/17/2024 Crawford OH Emergency Mngr Emergency management, law enforcement, and trained spotters report several instances of structural damage to homes and businesses in Bucyrus. Numerous trees down as well. Time estimated via radar. 0704 PM Tstm Wnd Dmg 3 NW Champion Heights 41.32N 80.88W 04/17/2024 Trumbull OH Emergency Mngr Delayed report, damage to a roof along with several large trees down, one of which was on a garage. A camper was also blown over. 0519 PM Tstm Wnd Dmg 2 N Glenmont 40.55N 82.10W 04/17/2024 Holmes OH Law Enforcement Tree down across TR 222. 0522 PM Tstm Wnd Dmg 5 E Nashville 40.59N 82.02W 04/17/2024 Holmes OH Law Enforcement Tree down near the intersection of SR 754 and CR 320. Time estimated via radar. 0528 PM Tstm Wnd Dmg 1 NE Killbuck 40.51N 81.97W 04/17/2024 Holmes OH Law Enforcement Tree down on TR 91. 0443 PM Tstm Wnd Gst 2 NNE Sandusky 41.49N 82.70W 04/17/2024 M58 MPH LEZ144 OH Mesonet Marine mesonet station XSDB 2 NNE Sandusky gust to 50 knots. 0330 PM Marine Tstm Wind 9 ENE Oregon 41.70N 83.26W 04/17/2024 M52 MPH LEZ142 OH Mesonet 45 knot wind gust at Mesonet station TWCO1 8 ENE Oregon. 0406 PM Tornado 1 WSW Bucyrus 40.80N 83.00W 04/17/2024 Crawford OH NWS Storm Survey NWS storm damage survey confirmed an EF-1 tornado with estimated peak winds of 110 mph in Bucyrus, OH. The damage path length is 3.48 miles and maximum width is 100 yards. This LSR denotes the start location of the tornado. 0651 PM Tornado 2 W Windham 41.23N 81.08W 04/17/2024 Portage OH NWS Storm Survey NWS storm damage survey confirmed an EF-1 tornado with estimated peak winds of 110 mph in Windham, OH. The damage path length is 3.99 miles and maximum width is 65 yards. This LSR denotes the start location of the tornado. 0701 PM Tornado 3 WNW Champion Heights 41.31N 80.91W 04/17/2024 Trumbull OH NWS Storm Survey NWS storm damage survey confirmed an EF-0 tornado with estimated peak winds of 80 mph in Southington and Champion Townships in OH. The damage path length is 2.96 miles with maximum width of 20 yards. This LSR denotes the start location of the tornado. 0350 PM Hail Marseilles 40.70N 83.40W 04/17/2024 M1.00 Inch Wyandot OH Public Delayed report. 0408 PM Tstm Wnd Dmg 1 NNE Bucyrus 40.81N 82.97W 04/17/2024 Crawford OH Public Trees snapped a couple of feet above ground in addition to several trees uprooted and structural failure of what appears to be a shed or outbuilding on E Mansfield St. Time estimated via radar. 0647 PM Tstm Wnd Dmg 2 W Windham 41.24N 81.07W 04/17/2024 Portage OH Public Drone footage photo shows extensive damage to a house that was shifted off of the foundation. There was also an overturned vehicle. Time estimate via radar. 0711 PM Tstm Wnd Dmg 5 NNE Champion Heights 41.35N 80.81W 04/17/2024 Trumbull OH Public Delayed report, multiple trees down along with large limbs on Bristol Champion Townline Rd NE west of N Park Ave. 0259 PM Tstm Wnd Dmg 2 SSE Sylvania 41.69N 83.68W 04/17/2024 Lucas OH Trained Spotter 12-15 inch diameter tree snapped off. Time estimated from radar. 0301 PM Tstm Wnd Dmg 3 E Sylvania 41.72N 83.64W 04/17/2024 Lucas OH Trained Spotter Multiple large branches down. Time estimated via radar. 0401 PM Tstm Wnd Dmg 3 SW Marion 40.56N 83.16W 04/17/2024 Marion OH Trained Spotter Tree and utility poles down. 0405 PM Tstm Wnd Gst 2 E Marion 40.59N 83.08W 04/17/2024 E65 MPH Marion OH Trained Spotter Estimated 60-70 mph wind gust and pea size hail. 0415 PM Hail 4 WSW Polk 40.92N 82.28W 04/17/2024 M1.00 Inch Ashland OH Trained Spotter Lasted almost 5 minutes. 0629 PM Tstm Wnd Dmg Streetsboro 41.24N 81.35W 04/17/2024 Portage OH Trained Spotter Tree down. 0648 PM Tstm Wnd Dmg 1 NNW Windham 41.25N 81.05W 04/17/2024 Portage OH Trained Spotter House damaged on County Road 229 south of State Route 82. Time estimated via radar.
Environment
Figure 1: MLCAPE & Effective Shear from 16Z to 00Z on April 17, 2024. Note the pocket of 1000 J/kg CAPE and 45 to 50 knots of shear across northern OH. | Figure 2: Effective SRH (ESRH) from 16Z to 00Z on April 17, 2024. Note ESRH values ranging between 100 to 200 m2/s2 across the area. | Figure 3: Tornadic Tilting and Stretching parameter from 16Z to 00Z on April 17, 2024. Note the small enhanced area (red contour) across Northeast Ohio towards the end of the loop. | Figure 4: LCLs from 16Z to 00Z on April 17, 2024. Note the initially unfavorable LCL heights > 1000 m. However, towards the end of the loop, more favorable LCL heights < 1000 m entered Northeast Ohio where an EF-1 tornado occurred. |
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