The National Weather Service says a wet and cold weather pattern from a series of storm systems would begin Tuesday with precipitation increasing Tuesday night and continuing through Thursday night before decreasing through Friday afternoon.
According to the Flood Control District officials, the Valley has seen a healthy amount of rainfall, with much of the area getting one to two inches of rain.
Officials said since the Valley has not seen rain since September, the ground is soaking up a lot of the water. Officials also said, however, that any more rain the area gets from this point may start to cause more flooding and runoff, which they say could reach danger points.
"Tomorrow, a funnel storm comes through and acts on this tropical moisture already here, and we could see some big storms that could drop a lot of rain in a short amount of time over already wet areas, so that’s what we will be watching tonight and tomorrow," said Steve Waters.
Flash flood watches on Wednesday covered all of Arizona except for the northeast, where a winter storm watch and a winter weather advisory were issued.
Sandbags have been made available to residents at many different locations in the Valley.
Meanwhile, people in parts of Northern Arizona are experiencing snow, with video from Snowbowl showing snow on the ground. However, snow has yet to fall on other parts of Northern Arizona as of Wednesday afternoon.
Officials in Flagstaff say they are expecting up to 10 inches of snow in the city's Downtown area.