Overview
Thunderstorms developed across northwestern Ohio during the afternoon hours of June 5th. A few of these storms developed along a remnant outflow boundary in central Henry county, allowing for one storm south of McClure, OH to briefly produce a EF0 tornado. More details can be found below. No other damage was reported across the Northern Indiana County Warning Area with this event.Tornadoes
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
Radar loops of the storm that produced the brief tornado
Reflectivity Loop | Storm Relative Velocity Loop |
Environment
A weak cold front was sinking south through the forecast area. this combined with an area of weak convergence allowed for development of thunderstorms across mainly NW Ohio. SBCAPE of 2000-2500 J/KG in place to allow rapid updraft formation. Bulk shear was generally 30 kts or less, and surface-based boundary interactions did help enhance shear locally, especially across Henry county.
Figure 1: Surface Based CAPE at 18Z / 2 PM EDT shows the axis of instability from west-central Indiana through northern Ohio. Surface winds also show the surface boundary extends from near Toledo through Henry County and into west central Indiana. | Figure 2: Note also that the Storm Relative winds suggest strongly convergent flow all along the surface boundary. Time 18Z / 2 PM EDT June 5, 2019. | Figure 3: Surface observations from 18Z / 2 PM EDT June 5, 2019. |
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