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    WeatherMatrix (Jesse Ferrell)

    Historic Midwest Storm's Greatest Hits

    By Jesse Ferrell, Meteorologist/Community Director
    11/01/2010, 4:10:23 AM

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    UPDATE: According to this page, there was a seiche but only at Green Bay Wisconsin.

    UPDATE: The official word on pressure records from this storm has been published by the National Weather Service. This is a super in-depth article. In short, yes MN & WI were broken but all-time non-tropical continental U.S. was not.

    It was a long day yesterday at AccuWeather as meteorologists covered and forecast the strongest low pressure system to ever affect the interior United States. Low pressure records were also broken in Minnesota and Wisconsin. 24 tornadoes were reported and winds were as high as 81 mph at Butlerville, Ohio. These incredible tornado damage pictures were taken in Cridersville, OH:


    6edd7b4c8

    Additional tornado information are available from NWS-Chicago (photos) and NWS-Northern-Indiana and NWS-Wilmington-OH.

    The station with the lowest pressure was Big Fork, MN, which dropped to 28.20" Hg at 4:13 PM yesterday. As you can see, this reading blew away previous years on the same day.


    time_chart

    Prior to this, the record low pressure for the interior (non-coastal contiguous) U.S. was 28.28", set in Cleveland during the 1978 storm, which still holds the "Great Lakes" record (which presumably includes the waters and Canada). The NWS says "non-tropical" which also works although I didn't get a chance to check on Nor'easters which are non-tropical.


    uf1027bs


    Wave heights spiked over 26 feet this morning at Buoy #45136 in northern Lake Superior.


    plot_wave1027b


    Some of the pressure/wind plots from coastal stations looked as good as during hurricanes, for example at the Rock of Ages Lighthouse winds gusted to 68 knots (78 mph) and pressure fell nearly to 28.40".


    plot_wind_pres1027a


    The number of NWS Spotter reports was so high that it overflowed their Google Map. All in all, 310 reports were received (mostly wind), making yesterday the 9th most active severe weather day of 2010. Very impressive indeed for October.


    svr1027as

    The high winds were due to the immense pressure difference between the storm and a high pressure system to its southwest. Check out the RadarPlus screen capture I posted yesterday to visualize the pressure and winds.


    uf1027as


    Here is a video of one of the Indiana tornadoes caught on tape:

    The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com

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    WeatherMatrix (Jesse Ferrell)

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    Jesse Ferrell 1

    WeatherMatrix (Jesse Ferrell)

    AccuWeather Meteorologist and Social Media Manager pens the WeatherMatrix blog covers extreme weather worldwide with a concentration on meteorology and social media.