NWS Forecast Office Phoenix, AZ

A Flood Watch will be in effect for portions of South-Central Arizona including far Northern and Eastern Maricopa, Northern Pinal, and Southern Gila Counties Monday night through Tuesday evening. Multiple rounds of showers and thunderstorms are likely to effect the area, with the potential for training of thunderstorms, meaning multiple may track over the same location, increasing the threat for flash flooding.

The Weather Prediction Center has issued a Moderate risk (3/4) for excessive rainfall across much of the eastern portions of AZ on Monday and Tuesday, while a Slight Risk remains for most areas of SC AZ. Periods of heavy rainfall could lead to flash flooding of low water crossing and washes.

Rainfall will be most widespread across the region from Monday through Tuesday night. Probabilities of receiving at least 0.50" is high for much of AZ with even a modest probability (>50%) for totals exceeding an inch across portions of southcentral AZ. Higher totals greater than 2.00" will also be possible, mainly over the foothills and higher terrain.

Abundant moisture and cloud cover will lead to much cooler temperatures during the first half of the coming work week, especially across South-Central AZ. As the Pacific low pressure system departs, expect gradually warming temperatures beginning Wednesday and through the end of the work week.