Severe thunderstorm (09/12/2011) - Klamath Falls, Oregon


Just west of Klamath Falls, Oregon. Strong thunderstorm with a rotating updraft has developed. This video could have been longer but my batteries were dying out at the time. Here is a radar image of a hook echo signature caught on top of Keno: oi54.tinypic.com And when the storm was at its strongest: oi52.tinypic.com And I took a picture a little later on, this is most likely a wall cloud, which is always accompanied by a supercellular type of thunderstorm: oi52.tinypic.com As a result of this low-topped and short lived supercell, there was a report of nickel sized hail (0.88" diameter) 2 miles WNW of Keno, along with 50 mph winds. First of all, I'm assuming this wasn't all that happened..... because I should mention that Keno is an extremely sparcely populated town, and surrounding the area is mainly farmland and mountains. There may have been a brief period of larger hail with winds of severe criteria, most likely. While these storms are nothing in comparison to storms in the midwestern and deep southern states.... The Pacific Northwest, regardless, does have history of these rotating thunderstorms. Based on geography and conditions prior to development, most of these supercells in Oregon last no longer than maybe an hour to an hour and a half. This storm, for example, was detected for as long as only 50-60 minutes, and showed signs of a mesocyclone for only about half of an hour. There are supercells that are classified as either (quote) "long-lived" or "short-lived <b>...</b>

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