Arizona Weather Force has issued a Flood Watch in advance of a strong storm system that will impact the area starting Tuesday and going for a couple of days. A Winter Weather Watch is also out for some mountain areas so read on for details …
A Flood Watch went out over the Arizona Weather Force micro-climate alert system today for Tuesday through Thursday. It is for CO River Valley … Western Arizona … Phoenix/Tucson Metros … Southern AZ … It reads; A powerful inside slider will drop out of the north overnight on Monday. As it moves south of Southern California the wrap-around dynamics will bring strong lifting across the entire flood watch area through Wednesday. Heavy rainfall through Wednesday will be likely with this event. Rainfall will be accompanied by a risk of thunderstorms, which will further enhanced totals. We could easily see 1-2″ of rainfall in a short period of time in the watch area.
The Winter Weather Watch went out right after it and outlines the snowfall risk with the system. It is for the Arizona Mountain Rim Cities To The North Rim Of The Grand Canyon … it reads; A powerful inside slider will drop out of the north overnight on Monday. As it moves south of Southern California the wrap-around dynamics will bring strong lifting across the entire winter weather watch area through Wednesday. The snowfall will affect these zones by early Tuesday morning. A median sticking snow-level of around 5,500 FT with snow possible down through the 4,500 ft mark. This places the heaviest in Flagstaff and Prescott with lesser amounts in the Payson areas. Still, along with the hardest hitting spots, 4-8″ of snow for a margin seems about right. Some areas are indeed isolated winter storm warning criteria zones like in the Flagstaff areas. The upper system will move over the area on Wednesday, which will up the snow-levels with the southerly flow warm air advection dynamic moving in. Snow-levels will move to 7,000 FT by that time so in some spots, it’ll snow on Tuesday and rain on Wednesday. More storm systems are lining up for the Rim for later on for the 24th and after. A winter weather watch means conditions are favorable for any type of snowfall. It is below the higher risk winter storm watch criteria, however as mentioned… some areas have that potential.
Snowfall risk maps will be issued with the final forecast alert.
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