With a roar that could have been mistaken for thunder, given the weather of late, fighter jets were seen flying below the cloud cover Saturday morning over the Lehigh Valley.

President Donald Trump is spending the weekend at his Bedminster golf club, his fourth trip to New Jersey in five weeks.

"This morning an aircraft violated the temporary flight restriction near Bedminster, New Jersey," U.S. Secret Service spokeswoman Julia McMurray said. "Military aircraft were launched and the pilot diverted his course without incident."

The Lehigh Valley is on the western edge of the 30-nautical-mile restricted-flight zone around Bedminister, the Federal Aviation Administration shows on its website. Those temporary flight restrictions began at 5 p.m. Friday and continue through 6:30 p.m. Sunday.

Aircraft may take off and land within that zone, but with only with prior approval. This weekend's QuickChek New Jersey Festival of Ballooning, for example, is occurring about six miles from the Trump National Golf Club.

The festival continues Sunday at Solberg Airport in Readingon Township, Hunterdon County. Balloon launches are also planned during the Balloon Festival at the Warren County Farmers' Fair that began Saturday and continues through Aug. 4.

Thank you to all our amazing fans who posted these spectacular photos from this morning’s balloon ascension! Photo credits: Laurie B., Richard M., Mark B., Amanda O., Karen M., Jessica L., and Bridget L. Posted by Quick Chek NJ Festival of Ballooning on Saturday, July 28, 2018

The fighter jets were seen about 11 a.m. following a loop that extended over Northampton and Bucks counties.

There was no need for the military jets to intercept the aircraft, said U.S. Air Force Major Mark Lazane, public affairs officer for North American Aerospace Defense Command.

McMurray and Lazane both deferred to the FAA for further information on the air-space violation. An FAA spokesman declined to comment Saturday.

This Federal Aviation Administration map shows the radius of temporary flight restrictions in place July 27-29, 2018, while President Trump visits his golf club in Bedminster, New Jersey. (Courtesy image | For lehighvalleylive.com)

The fighter jets weren't doing any maneuvers out of Lehigh Valley International Airport, confirmed Colin Riccobon, spokesman for the owner, the Lehigh-Northampton Airport Authority.

An Air Force fighter jet did intercept a small, general aviation plane July 21 that had entered the TFR zone near Trump's private club, according to a report on marketwatch.com. Authorities met with the pilot upon landing at Sky Manor airport in Pittstown, Hunterdon County, and deemed the incident a non-threat, according to the report, citing a White House spokeswoman.

More flight restrictions are in store Aug. 2-13 around Bedminster, nj.com reports, suggesting a return by Trump.

Kurt Bresswein may be reached at kbresswein@lehighvalleylive.com. Follow him on Twitter @KurtBresswein and Facebook. Find lehighvalleylive.com on Facebook.