June 27th 2015

This was a very unusual weather patter for late June. Basically, a low pressure system amplified by a neutral trof developed over southern Illinois and quickly deepened when an MCS formed with the center of the low and fed back energy. The low pressure system then quickly tracked north-east from Indiana and occluded as it reach Southern Ontario.  Despite the occlusion occuring, there was enormous low level wind energy and weak instability which allowed the system to continually fill with rain and weak embedded storms all in addition to remnant moisture from the pre-existing MCS.

Despite this being a synoptic system that really just made for a miserable and cool weekend, I somehow decided that it would be a good idea to head down to the Lake Ontario shoreline. It was actually very tropical storm like with constant winds and rain bands battering the shore and his actually created some interesting weather.

June 25th 2015

Here are a couple GIF loops showing the storm and the associated velocity couplet. You’ll also find a time-lapse video at the bottom showing the supercell mesocyclone and associated wall cloud in motion with clear rotation.
IMG_3401 IMG_3405

 

June 8th 2015

This was one of those somewhat unusual setups where storms were poised to fire along a trough from a secondary low behind a weak cold front. The initial cold front brought weak storms and drenching rains overnight and into the morning.

June-8th-sfc-analysis

Storm Chases Across Southern Ontario and Tornado Alley