An arctic eruption has sent temperatures plummeting from the Northwest to the Great Basin.
Temperatures will typically be 10-20 degrees lower than average, but the coldest areas in Montana or North Dakota could be up to 40 degrees below average.
NORTHWESTWEATHER FORCES MANY INTO SHORTELS
These areas have received wind chill warnings. Wind chill temperatures can drop as low as -30 to-40 degrees.
Frostbite can develop in as little as 20 minutes at these temperatures.
The western United States continues to see a series of storm systems from the Pacific.
The heaviest rainfall will fall in Southern California on Wednesday and Thursday.
Flash flooding advisories were issued from San Diego to Irvine.
Finally, in the Southeast, severe storms will be likely Wednesday afternoon and evening.
Severe thunderstorms with severe winds and frequent lightning are possible.
It is also possible to have isolated tornadoes.
Parts of northern Mississippi, northern Alabama, and southwestern Tennessee are the most at-risk areas for severe weather.
Source: Fox News