Thunderstorms in Montreal - May 19th-20th, 2011





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Published on May 21, 2011

This is a video depicting airmass thunderstorms developing around Montreal on both the late afternoon of May 19th (the first piece of this video) and May 20th, which is represented by the rest of the footage.

Some of the congestus clouds on the evening of May 20th eventually gave way to some occasional lightning occurrences in the distance towards the U.S border towards New York state. The series of congestus clouds as well as the cumulonimbus seen just before the final segment of the video were looking about 60 km to the ESE and South to SSE, respectively. Because of our positioning relative to the (persistent) low to our SE, these storms were traveling from the NE to the SW. The evening storms were, however, being set off by a cold front descending from the NW, which later resulted in two brief thunderstorms on the evening of May 20th and during the overnight period.

The storm cell in the last segment that I had been tracking actually was a series of ordinary multicell thunderstorms, which traveled a span of nearly 100 km before dissipating - it first formed North of Montreal before heading SW and then curving a little farther to the South towards highway 401.

Our first storm this year was on the morning of April 11th, but after the two we received during the night of May 20th, this brings us up to six storms seen so far this year. These were all non-severe storms, however. I now have my eye on tomorrow (May 23rd - Victoria Day) for a potential outbreak of severe thunderstorms for Ontario and Quebec.

This footage was taken in SW Pierrefonds, which is located in Montreal's West Island.



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