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09/10/2009 Reports: MB

Joined
Jan 11, 2006
Messages
372
Location
Winnipeg, Manitoba
A very warm and moist air mass resided across southern Manitoba Thursday afternoon, with dewpoint temperatures reaching 25 C. A cold front, in association with an intense upper trough, was forecasted to sweep northeastward from North Dakota into southern Manitoba Thursday evening. Ahead of the cold front, severe thunderstorms – with a primary threat of large hail – were a high probability.


I observed a large, isolated thunderstorm developing just north of the International Border around 7:00 PM, moving northeast at 30 km per hour into southern Manitoba. I opted to intercept this storm as it approached highway 75 near Morris, MB.


As I intercepted the storm, it was apparent that it was evolving from an isolated cell into a linear MCS, with intense electrical activity, wind gusts measured to 85 km/h and quarter sized hail.


All in all, this storm was well worth the short trip south of Winnipeg to witness the amazing “anvil crawlersâ€￾ that lit up the sky in almost every direction. I found a nice vantage point just north of the precipitation to take some memorable pictures of this event that persisted until well after 11:00 PM. Opportunities like this are a rare treat here in September.

http://skywatch7.com/wp-content/uploads/2009/09/IMG_4994.JPG
http://skywatch7.com/wp-content/uploads/2009/09/IMG_5012.JPG
http://skywatch7.com/wp-content/uploads/2009/09/IMG_5016.JPG

John
VE4 JTH
 
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