Washington State Patrol is warning motorists to slow down.

Get our free mobile app

While temperatures climbed into the 40's on Wednesday, the overnight low dipped below 30 degrees, causing some wet areas to freeze.

Troopers responded to two different roll-over collisions on SR 395 just south of Connell.

What is black ice and what causes it?

Black ice is a glaze that forms on roads, sidewalks, driveways, and parking lots. Due to freezing rain or melting and re-freezing snow, water, and ice on surfaces, it's referred to as "black ice" because it's transparent and hard to detect.

The NWS warns that black ice can cause hazardous driving conditions.

Common locations to find black ice include bridges, overpasses, and spots on the road shaded by trees or other objects.

Bridges and overpasses are prone to black ice because cold air is able to flow underneath the road surface, since it is elevated, therefore lowering the pavement temperature. Shaded spots on the road are prone since they receive less warmth from the sun during the day.

Should you encounter black ice, the FSUSDA has a few tips for navigating through it.

KEEP READING: Get answers to 51 of the most frequently asked weather questions...

LOOK: The most expensive weather and climate disasters in recent decades

Stacker ranked the most expensive climate disasters by the billions since 1980 by the total cost of all damages, adjusted for inflation, based on 2021 data from the National Oceanic and Atmospheric Administration (NOAA). The list starts with Hurricane Sally, which caused $7.3 billion in damages in 2020, and ends with a devastating 2005 hurricane that caused $170 billion in damage and killed at least 1,833 people. Keep reading to discover the 50 of the most expensive climate disasters in recent decades in the U.S.

LOOK: The most extreme temperatures in the history of every state

Stacker consulted 2021 data from the NOAA's State Climate Extremes Committee (SCEC) to illustrate the hottest and coldest temperatures ever recorded in each state. Each slide also reveals the all-time highest 24-hour precipitation record and all-time highest 24-hour snowfall.

Keep reading to find out individual state records in alphabetical order.

More From 870 AM KFLD