It wasn't rain. So what was that mysterious stuff that appeared off the New Jersey coast on National Weather Service radar screens Thursday night? (National Weather Service) Something strange ...

The chaff first appeared on radar at UAH about 1:45 p.m. but Knupp said it was still visible - although with a lesser concentration - when he last looked at 11:45 p.m.

Known as chaff, it’s a radar countermeasure in which aircraft or other military targets spread a cloud of small, thin pieces of aluminium, metallised glass fibre or plastic.

Chaff consists of small fibers that reflect radar signals and, when dispensed in large quantities from aircraft, form a cloud that temporarily hides the aircraft from radar detection.

HUNTSVILLE, Ala. (WHNT) – There’s a new theory about what caused a mysterious ‘blob’ on radar images over west Huntsville on Tuesday. This one may stick. The radar experts … ...

Chaff is released in large amounts, forming a cloud that shows up on radar as many false targets. This can be used in training or real combat to protect aircraft from being detected.

On June 4, meteorologists in Huntsville, Ala., noticed a "blob" on their radar screen that looked like a strong thunderstorm, despite the fact the sun was shining and not a drop of rain could be ...

On June 4, meteorologists in Huntsville, Ala., noticed a "blob" on their radar screen that looked like a strong thunderstorm, despite the fact the sun was shining and not a drop of rain could be ...

That same day, strange radar shapes appeared over the Florida Keys, too. Again, the NWS guessed it was chaff – Florida is apparently rife with military exercises – but that hypothesis was ...

Chaff strips, called “window” by the British, didn’t mimic radar signatures of bombers, something impossible.

Weather; Mysterious blob appears on radar off the Jersey Shore. Updated: ; May. 06, 2016, 7:28 p.m. | Published: ; May. 06, 2016, 6:28 p.m.

Chaff is released in large amounts, forming a cloud that shows up on radar as many false targets. This can be used in training or real combat to protect aircraft from being detected.