A FLASH FLOOD WATCH will go into effect on Tuesday afternoon for most of Southern Colorado. Daytime heating and moisture will combine with a disturbance moving through Colorado to develop numerous thunderstorms. Any one of them will be more than capable of producing very heavy rain. Burn scars and areas that have seen recent heavy rain will be under the greatest risk for flash flooding. The 11 Breaking Weather Team will be tracking this threat all day for you.
Federal investigators say an airplane pilot never acknowledged a controller's warning before his plane collided with another.
The Piper Cheyenne and a Cessna 172 both crashed to the ground Jan. 24 after colliding in midair.
The crash killed all five people on the planes and rained debris over a 24-block area. The Cessna smashed into a house and ruptured a natural gas line.
That triggered an explosion a few minutes later.
A preliminary report from the National Transportation Safety Board also indicates an apparent problem with an altitude transponder on the Piper.
The NTSB says the pilot reported his airplane was transmitting altitude information to air traffic control even after a controller said the signal wasn't registering.
The report says controllers also warned the Piper Cheyenne pilot that the Cessna was directly ahead, but he never responded.