Sandy produced long-duration, record high waves on lower Lake Michigan earlier this week.
According to the National Weather Service, the highest recorded wave height on the south mid-lake Michigan buoy during Sandy was 21.7 feet, at 11:50 a.m. CDT, Tues., Oct. 30.
This is the second-highest wave height on record, which spans approximately 31 years. The record of 22.9 feet on Sept. 30, 2011 still stands.
While the buoy is not deployed during the late fall and winter it is a remarkable observation for the period spanning the spring, summer and early- to mid-autumn.
While the wave height record was not reached, a high wave duration record has been set.
On Oct. 30, 2012, there were 10 straight hours of recorded waves of 18 feet or greater. The previous record occurred Nov. 10-11, 1998, when there were seven consecutive hours of 18-foot waves.
Prior to Oct. 30, there has only been a combined total of 15 hourly observations of 18-foot or greater waves. This makes the event with Sandy even more extraordinary.
Waves and the winds responsible for the rough waters on Lake Michigan and the lower Great Lakes in general will gradually subside through the remainder of the week as Sandy weakens and moves northward into Canada.
Winds blowing across the lake from north to south for a several-day period contributed to the build-up of waves.
Expert Senior Meteorologist Ken Clark contributed to the content of this story.
Cooler temperatures and lower humidity continue through late-week, despite the return of thunderstorms.
Seattle is in store for an extended stretch of sunshine and warmer weather.
A tropical wave west of the Cape Verde Islands looks like it could be the next named tropical storm in the Atlantic Basin.
Following thunderstorms, cooler settles into the Midwest and Northeast through Midweek.
Cooler-than-normal temperatures are in store for Chicago this week.
One person is dead, and another remains critically injured after a lightning strike in Southern California.
Small but intense storm, said to be the worst in about 50 years, hit southern Mississippi (where Camille hit in 1969). U.S. Coast Guard cutter lost with 39 aboard.
New England (1949)
Heat wave in New England; Greenville, RI hit 102 degrees.
Marquette, Il (1988)
99 degrees for a date record.