Originally Published: October 16, 2018 11:29 a.m.
Remnant moisture from what used to be Hurricane Sergio brought considerable shower activity this past weekend, especially in the Phoenix area, where 1 to 2 inches of additional rainfall was reported. We are now only halfway through October, and it has been the wettest month of October on record for Phoenix.
Still another round of possible light-to-moderate rain showers is on tap for the Prescott area again tonight, Oct. 16, to tomorrow. This is due to the fact that an upper-level cold core low currently directly over Central Arizona will circulate relatively moist air from the east across the area and produce periods of lifting. Rainfall totals will most likely be in the quarter-to-half inch range, and it will be breezy and cold. Areas above 6,000 feet are expected to experience snow, and Flagstaff is expecting 2 to 4 inches of accumulation tonight to tomorrow morning.
Unsettled weather is on tap for Wednesday and Thursday as the low slowly rotates toward the east, with only a very slight chance of lingering showers, but most of the activity will be east of us. Conditions will improve on Friday, but another weak cutoff low is expected to develop along the coast of Southern California this weekend and circulate moist, unstable air back into the state, bringing another chance for showers or thunderstorms Saturday to at least Monday of next week.
Information provided by Curtis James, Professor of Meteorology at Embry-Riddle Aeronautical University