Planes and autos affected

BOISE -- Foggy conditions are plaguing travelers in and around the Treasure Valley.

The National Weather Service issued a dense fog advisory overnight that expired at noon.

Meteorologist Larry Gebert says the visibilities are improving as the daytime temperatures warm up and the fog begins to lift a little. That does not mean it will be going away. In fact, the fog will be hovering over the valley most the week. A dense fog advisory is likely again tonight as things begin to cool down again.

The fog has created some problems on the roadways and in the air.    

Boise Airport officials said some flights were unable to land last night because visibility was very limited.

Airport spokesperson Patty Miller says some planes couldn't land because they didn't have the right equipment on board to deal with the fog.

It’s up to each airline to decide if they should cancel a flight or not.

Sometimes the airport uses cloud seeding to help combat the fog. That's when they put a chemical in the air to turn the fog into ice crystals.  They are not doing that today.

Airport officials say they don't need to because flights can take off.  People are boarding flights today, but last night's cancellations did cause some problems this morning. 

Some planes didn't land in Boise Tuesday evening, so when they went to take off this morning and some passengers were left behind. 

And on area roads, police say foggy conditions and cold temperatures are to blame for two rollover crashes on Interstate 84.

The first happened accident happened around 8 p.m. Tuesday.

Police say the driver of the car was heading west on I-84 near the Gowen Road exit when he quickly approached slowing traffic. The driver then swerved to the left, and went over a concrete barrier, landing right side up and facing oncoming traffic.

Driver’s door had to be pried open, but the man was conscious and taken to a local hospital with non-life threatening injuries. Police say alcohol may have been a factor in the crash.

The second crash happened early Wednesday morning on I-84 near Blacks Creek Road. Police say the driver lost control after hitting a slick spot and then rolled his car.

The driver suffered a cut to the head but was treated at the scene.

Police say the fog caused the road to ice over and was a factor in this accident.