Northwest Flight 2501 (N95425) was operating its daily transcontinental service New York La Guardia -Minneapolis/St. Paul-Spokane-Seattle on the night of June 24, 1950. The flight, a DC-4 was carrying 58 persons (55 passengers and 3 crew members).
The plane was at around 3,500 feet over Lake Michigan about 20 miles NNW of Benton Harbor, Michigan when it vanished off the radar screens after requesting descent to 2,500 feet. A widespread search was commenced including searching and dragging the bottom of Lake Michigan with sonars and trawlers but to no avail. Other than some light debris found on the surface no trace of the plane or its occupants was ever found.
There were many suggestions as to what caused the plane to vanish from the radar. It is known that Flight 2501 was entering a squall line and turbulence but since no trace of the plane was found, the cause of the crash was never discovered.
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