The Swiss-made Solar Impulse 2 was scheduled to take off from Lehigh Valley International Airport in Allentown and head to New York City around midnight Monday.
However, at about 12:30 a.m. this morning, the flight team announced the flight was being postponed due to persistent heavy rains and thunderstorms moving through the region.
A tropical storm coming onshore in Florida from the Gulf of Mexico and passing over the Southeastern US before heading out over the Atlantic Ocean led to unsettled weather up and down the East Coast.
It wasn't immediately clear when the flight would take place.
The plane, which has been in Pennsylvania since May 25, was scheduled to fly over the Statue of Liberty before landing at John F. Kennedy International Airport in, its last stop in the United States before crossing the Atlantic Ocean.
Solar Impulse 2's epic round-the-world journey began March 2015 from Abu Dhabi, the capital of the United Arab Emirates.
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