Two to three inches of precipitation flood San Diego County's streets into Arizona, leaving even some people in southern California stranded overnight due to flash floods.
Interested in weather?
Add Weather as Interest to stay up to date with ABC News latest weather news, videos and analysis.
Eleven states from California to Wisconsin are under flood warning snow and wind while this storm is slowly moving east.
Heavy rain falls Wednesday morning in Southern California, Nevada and Arizona. Even in California and Arizona, torrential warnings were issued.
In the higher elevations, Wednesday morning snow falls from the mountains of the Sierra Nevada in California to Montana.
On the night of Thursday morning, the storm reaches the Great Lakes and the Northern Plains and brings heavy rain from Minneapolis to Chicago.
The southern plains of Oklahoma to Arkansas and Tennessee can also be ravaged by heavy rains as the southern part of the storm moves east on Thursday. Some areas could see up to four inches.
Meanwhile, in the north, snow will fall from the Dakotas to northern Minnesota and the upper peninsula of Michigan.
Northern Minnesota issued a warning about a winter storm that could drop as much as ten inches of snow. No major accumulation is expected for the Twin Cities.
The heaviest snow will be possible in the Rocky Mountains at 2 feet in southwest Colorado. Snow is also possible in the mountains outside of Los Angeles, San Diego, Las Vegas and northern Nevada, where some areas can see up to 1