Large Blue Flash with radio outage.I was in the north western part of Lehigh not far from where Gunnery merges with Buckingham Road. I was in the car with my girlfriend when we both say a very large flash of blue light in the East-Northeastern part of the horizon. The light appeared to be ground based and only lasted for about a second at full brightness. The part that I find odd about this flash (to make me not think it was just someone with fireworks) is that at the exact moment the flash started, the radio in my car went out and stayed out until the flash had faded (about 5 seconds total from beginning of the flash to the return of the radio signal).