NWS Forecast Office Phoenix, AZ

An amplified low pressure system off the CA coast by the middle of the week is expected to pull in well-above normal moisture into the Desert Southwest. This will result in heightened rain chances on Wednesday and Thursday. The highest rain chances (50-90%) are expected across south-central AZ and the eastern AZ high terrain. While some uncertainties remain in the rainfall totals, the current forecast is between 0.25-1.00” across the lower deserts and 1.00-2.50” across the higher terrain areas.

The Weather Prediction Center (WPC) has placed areas from Phoenix and points north and east in a Slight Risk for excessive rainfall leading to flash flooding for both Wednesday and Thursday.

Near to slightly above normal temperatures the next couple of days with widespread Minor HeatRisk expected. A weather system affecting the area by the latter half of the week will result in a cooling trend.