More on Woodbury Tornado

Today NBC Connecticut obtained home video of a funnel cloud moving through Woodbury last Thursday. I was surprised but not shocked when I took a closer look at Doppler Radar from Long Island during the event.

A rather impressive bow echo developed on the Connecticut/New York line around 4:00 p.m. and raced northeast. A Rear Inflow Jet (RIJ) developed behind the squall line forcing the line to bow out.  Widespread wind damage was reported in Sherman, New Fairfield, and New Milford from this bow echo.

Bow Echo over Sherman and New Fairfiled / OKX Base Reflectivity 0.5º
Rear Inflow Jet from OKX base velocity 0.5º

As the bow echo continued east on the northern portion of the bow echo a mesocyclone developed that spawned a brief tornado in Woodbury.

Though Doppler Radar did not indicate a tight circulation or Tornado Vortex Signature this doesn’t rule out the possibility of a tornado occurring.

Likely Location of Cyclonic Rotating Head at Northern Portion of Bow Echo / OKX Base Reflectivity 0.5º
Downburst Likely Occuring Over Southbury Near Bow Apex While Tornado Occurs to the North / OKX Base Velocity 0.5º

This is not an uncommon occurrence to see a brief tornado touch down on the northern part of a bow echo. The following is a conceptual model of a bow echo from Fujita 1978 courtesy of UCAR.

Bow Echo Conceptual Model (Fujita, 1978) Courtesy: UCAR

Based on the location of damage reports the Doppler Radar evidence does indicate the possibility of a tornado on the northern portion of the bow in Woodbury.