Phoenix, AZ

Temperatures Above Average in Arizona; Cloudy and Rainy Weather Expected

Bryan Dijkhuizen

High pressure over the area will result in temperatures that are somewhat above average until the middle of the week, but significant cloudiness will return beginning on Tuesday as well.

In addition to offering some chances for rain by Thursday, a slow-moving Pacific weather system off the West Coast will continue to bring moisture and clouds to our area through the end of the week.

An unsettled weather pattern is expected to persist into the following weekend, with temperatures expected to decrease somewhat and the possibility of further precipitation increasing in the process.

The beautiful skies that have blanketed our area for the previous few days will be replaced by clouds later today as moisture pouring eastward from the eastern Pacific south of a deep upper-level low finds its way into our region.

The low-pressure system stays somewhat stable just west of Oregon and northern California, allowing a continuous stream of upper-level precipitation and clouds to enter our area through the middle of this week.

Due to the strengthening of the low-pressure system to our west, the ridge above our area will be amplified, resulting in high temperatures of approximately 70 degrees today and maybe even into the lower 70s through the middle of the week, depending on cloud cover.

Although we should continue to see a lot of clouds throughout the week, if the low-pressure system retrogrades westward, any prospects of rain on Thursday and Friday may be slim to non-existent.

Because of the quantity of accessible moisture expected to be there, a shortwave trough traveling across our area would most certainly bring widespread rain chances and maybe even some significant rainfall in the Arizona high country.

Modeling has shifted in favor of the low tracking back westward in recent days, and it seems that this will be the preferred option by later today or overnight. This drier solution for Thursday and Friday will almost certainly result in greater rain chances at some point over the upcoming weekend if it holds up.

Because this solution is preferred by both the 00Z operational GFS and the European runs at this time of day, it will deliver the highest possibilities for precipitation on Saturday.

As soon as the uncertainty in the models is resolved, we should zero in on the anticipated time and precipitation levels.

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