Overview
A complex of thunderstorms produced damaging wind in a swath from southern Montgomery county and northern Putnam county through the Interstate 74 corridor into Ohio before gradually weakening as it moved into northern Kentucky and West Virginia. The peak measured wind gust was 68 mph at the Crawfordsville AWOS with pockets of higher end damage across far southeastern Marion county and far northwestern Shelby county. Later in the evening, a rogue thunderstorm along the front produced a landspout that moved from Illinois into Warren county causing no damage.
Landspout
Landspout - Warren County, IN
Track Map
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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 |
Radar
Selected images from the event are below. A loop of radar from the event follows the images below.
Radar at 3:00 PM EDT | Radar at 4:00 PM EDT | Radar at 5:00 PM EDT |
A loop of the radar showing the evolution of the storm |
Storm Reports
Preliminary Local Storm Report...Summary National Weather Service Indianapolis IN 311 PM EDT Sun Jun 30 2024 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0315 PM Tstm Wnd Gst 2 N New Market 39.98N 86.92W 06/29/2024 M68 MPH Montgomery IN AWOS AWOS station KCFJ Crawfordsville. 0320 PM Tstm Wnd Dmg 2 S Waveland 39.85N 87.05W 06/29/2024 Parke IN 911 Call Center Several reports of trees down across the northeastern portions of the county. Time estimated from radar. 0347 PM Tstm Wnd Dmg 3 SW Danville 39.73N 86.56W 06/29/2024 Hendricks IN Public Power lines downed. 0349 PM Tstm Wnd Dmg 3 WSW Stilesville 39.62N 86.68W 06/29/2024 Putnam IN 911 Call Center Trees down blocking both westbound lanes of US40. Time estimated from radar. 0351 PM Tstm Wnd Dmg 1 NE Danville 39.77N 86.51W 06/29/2024 Hendricks IN Trained Spotter Three trees about 6 inches in diameter across the road, time estimated from radar. 0356 PM Tstm Wnd Dmg 1 WNW Plainfield 39.70N 86.41W 06/29/2024 Hendricks IN Public Large maple tree limb snapped. Time estimated from radar. 0422 PM Tstm Wnd Dmg 3 SSE Beech Grove 39.68N 86.07W 06/29/2024 Marion IN Public Numerous trees downed with roof damage also noted in a localized area near Edgewood and Emerson. Time estimated from radar. 0422 PM Tstm Wnd Dmg 1 N Beech Grove 39.72N 86.09W 06/29/2024 Marion IN Public Several large trees downed across Beech Grove. Time estimated from radar. 0432 PM Tstm Wnd Dmg 5 SW New Palestine 39.67N 85.95W 06/29/2024 Marion IN Emergency Mngr Several large and mature trees snapped or uprooted with power pole damage also noted. Time estimated from radar. 0454 PM Tstm Wnd Dmg 1 E Morristown 39.67N 85.69W 06/29/2024 Shelby IN Public Tree down across US52 near Morristown. Power out across town. Time estimated from radar. 0515 PM Tstm Wnd Dmg 1 SSE Knightstown 39.78N 85.52W 06/29/2024 Rush IN Emergency Mngr Large tree downed. Time estimated from radar. 0520 PM Tstm Wnd Dmg 1 W Mays 39.74N 85.46W 06/29/2024 Rush IN Emergency Mngr Large trees down. Time estimated from radar. 0732 PM Landspout 2 E Tab 40.41N 87.43W 06/29/2024 Warren IN Trained Spotter Approximate end location of a landspout that began in far eastern Illinois. Photo received via social media.
Environment
Thunderstorms began shortly after 2 PM with a marginal CAPE and shear environment during the course of the storms. The biggest hinderance to the mixing down of the very strong rear inflow jet winds was the low level lapse rates being less than moist adiabatic. Had the lapse rates been a bit higher, this system would likely have produced much more widespread 60-80 mph winds based on the strength of the cold pool.
Figure 1: Bulk Shear at 4:00 PM EDT | Figure 2: Mixed Layer CAPE at 4:00 PM EDT | Figure 3: 0-3km Lapse Rate at 4:00 PM EDT |
The intersection of the outflow boundary created by the earlier thunderstorms and the arriving front created a narrow window with a higher Enhanced Stretching Potential parameter as seen in figure 4 below. This favorable environment produced a weak landspout that caused no damage across Warren county.
Figure 4: Enhanced Stretching Potential Parameter at 8:00 PM EDT |
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