Chilly weather forecast to impact Northwest, Great Basin

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An arctic outbreak has sent temperatures tumbling, from the Northwest through the Great Basin. 

Temperatures will generally be 10-20 degrees below average, however, the coldest locations in Montana and North Dakota could be as much as 40 degrees below average. 

Wind chill alerts have been issued across these regions, where wind chill temperatures could dip as low as -30 to -40 degrees. 

Wind chill alerts from Northwest through the Great Basin
(Credit: Fox News)

At these temperatures, frostbite can set in over a period of 20 minutes or less. 

In the western U.S., the series of storm systems off the Pacific continues.

On Wednesday and Thursday, the heaviest rain will fall across Southern California. 

Flood alerts in California
(Credit: Fox News)

Flash flooding advisories have been issued from San Diego to Irvine. 

Finally, in the Southeast, severe storms will be likely Wednesday afternoon and evening. 

Severe thunderstorms with damaging winds and frequent lightning are likely. 

Severe storm threats in the Southeast
(Credit: Fox News)

Isolated tornadoes are also possible. 

The highest risk areas for severe weather include portions of northern Mississippi and northern Alabama into southwestern Tennessee. 

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