The same storm system that packed quite a wet punch from Los Angeles to Phoenix and Las Vegas Thursday and Thursday night will head to the four corners on Friday.
A concentrated area of soaking, heavy showers and thunderstorms will hammer areas such as Grand Junction, Durango, Santa Fe and Albuquerque.
In some areas, rainfall will exceed one inch or more in only a couple of hours. Places that receive rainfall of this magnitude will have rapid flooding of small streams and normally dry washes.
Along steep canyons, ravines and mountainsides, dangerous mudflows and rockslides are possible.
In the highest elevations and ski resort areas, such as Telluride, Steamboat Springs, Vail and Aspen, the first winter storm of the season will dump 4-8 inches of thick, wet snow.
If you will be driving though mountain and back country roads, hiking wilderness trails, camping or sightseeing, be prepared for flooding or rapidly changing snow levels.
Heavy snow can bring down tree branches and snow packed roads over high mountain passes can make traveling impossible.
Be sure to have a plan of action if you get into trouble and to let someone know which trails or roads you will be taking.
Also, be aware that flood waters can travel a long distance from the origin of the rainfall through dry wash channels and stream/creek/river beds.
This storm will exit the Four Corners Saturday and move on the Nation's Heartland for Saturday.
Keep checking back at AccuWeather.com for the latest on this autumn storm, and for all your weather needs.
The late-season swelter will continue along much of the Atlantic Seaboard through the week as tens of millions head back to school and work.
Tropical depression five has formed in the southwestern Gulf of Mexico's Bay of Campeche and will continue its west-northwest path during the next couple of days.
A second volcanic eruption occurred on Sunday morning in Iceland in the same area that had one on Friday.
Severe thunderstorms will threaten holiday festivities across parts of the Midwest and central Plains to close out the extended Labor Day weekend.
While flooding is a threat, monsoonal rains will be beneficial for most areas across northwest India this week.
Gusty winds, large hail and power outages occurred Sunday into Monday morning in the north-central United States.
Yuma, AZ (1950)
123 degrees - hottest temperature ever in Yuma. Yuma is the hottest city in the U.S.
Los Angeles, CA (1955)
110 degrees, hottest day ever in September. This mark was tied September 4, 1988.
Milwaukee, WI (1988)
Hottest summer on record. Six days of 100 degrees or greater and 36 days of 90 or above. Average temperature of 73.8 beat the old record of 72.8 set in 1921 and 1955. The normal average tempera- ture for a summer in Milwaukee is 68.3 degrees.