Did you notice Monday's hazy sky? Smoke from California wildfires traveled to East Coast

Did Monday's sky seem a bit on the hazy side? 

The subtle change of scenery was due to the wildfires in California. 

According to the National Oceanic and Atmospheric Administration, "So far in 2018, wildfires have burned almost 7 million acres across the U.S. and their smoke has blanketed much of the west, with some smoke plumes extending all the way to the East Coast and beyond." 

Meteorologist John Banghoff, with the National Weather Service, says this is possible because as wildfires burn, the air gets very hot, travels high into the atmosphere, and enters the jet stream. 

The fast-moving air at that altitude, combined with the fact that wind travels from west to east, allows smoke plumes to make their way to the opposite side of the United States. 

Banghoff says the smoke plumes have traveled away from Pennsylvania and farther south and east. 

This isn't the first time this has happened. Most recently, California wildfires in August reached central Pennsylvania. 

More:Arctic air to arrive in central Pennsylvania on Thanksgiving Day, NWS says

More:Pennsylvania's Sunday deer hunting ban is in the crosshairs: Could it change?