Sep 30, 2011

Typhoon Roke and Stronger Mid Latitude Storms

You can't always trust the barometer. On September 16th, Madison, WI (KMSN) reported a pressure of 30.34"/1027.7 mb and light rain. A shortwave trough was moving directly over a surface high and was still able to produce some light rain even as it encountered an increasingly confluent flow over the Great Lakes.

On September 19th, a 964 mb storm prompted hurricane force wind warnings for the Gulf of Alaska:
Same storm two days later:
This is category 4 Typhoon Roke on September 20th south of Japan with 115 knot (135 mph) winds:
It was a category 2/90 knot (105 mph) storm when it made landfall in southern Japan around 4:30Z on the 21st.
Tokyo was hit with 90 mph winds and 260,000 households lost power.

On September 20th, a 998 mb low produced a 75 mph wind gust at Bullhead, SD and a 66 mph gust at Pierre, SD.
Yesterday (September 29th), this 992 mb storm prompted storm warnings for Lake Superior and Lake Michigan:
Winds gusted to 60 mph at Sturgeon Bay Airport, 69 at Stannard Rock Lighthouse (Lake Superior), 69 at Sister Bay (Door County, WI), and 71 at Green Bay Lighthouse. At 3:50 AM toady, Buoy 45007 in south central Lake Michigan, 43 miles ESE of Milwaukee, reported 23 foot waves.

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