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MOST ACCURATE FORECAST: Storm chances ramping up across Arizona on Tuesday

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PHOENIX — The Phoenix metro area and most of central and western Arizona remain under an Excessive Heat Warning until 8 p.m. today.

So, we remain in ABC15 Weather Action Mode as a reminder to take action to stay safe in these dangerously hot temperatures.

Excessive Heat Warnings are also in effect for northwestern Arizona and areas along the lower Colorado River Valley through Tuesday night.

With this sizzling hot forecast, the risk for heat-related illnesses like heat exhaustion and heat stroke is high.

So, limit your time outside, stay hydrated with water and electrolyte drinks and never leave kids or pets alone in your vehicle no matter how quick the errand.

We are also still tracking chances for monsoon storms.

Most of the action will stay in the higher terrain of northern, eastern and southern Arizona, but there is a slight chance of storms moving into the Valley this evening or in the overnight hours.

Then, as a disturbance moves through northern Mexico, storm chances will ramp up quite a bit across Arizona tomorrow. That includes right here in the Valley.

Any storms that develop will be capable of producing gusty winds, blowing dust, hail, and areas of heavy rain and flooding, especially near wildfire burn scars.

Key timing to watch out for storms in the Valley will be after 6 p.m. on Tuesday.

Late night storms and left over clouds will help keep temperatures down a bit, too.

Valley highs will dip below 110 degrees on Wednesday and Thursday before heating up again heading into the weekend.

Air quality is also a concern in the Valley again this week.

An Ozone High Pollution Advisory is in effect though Tuesday and an Ozone High Pollution Watch is in effect on Thursday.

Ozone pollution will reach unhealthy levels for kids, older adults and anyone with any respiratory issues like asthma or COPD.

Breathing in ozone pollution can lead to health impacts like chest pain, coughing, throat irritation, congestion and difficulty breathing. So, limit your time outside in the afternoon when ozone pollution is peaking. Even healthy adults trying to exercise outside may experience health impacts.

Everyone can help prevent the pollution problem from getting worse by carpooling, taking public transportation or working from home. Also, wait until after dark to fill up your gas-powered vehicles and avoid idling in long drive-thru lines.

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2024 Rainfall totals:

Sky Harbor Official Rainfall: 4.19" (+0.19" from average)

Valley Average (Phoenix Rainfall Index): 3.90"

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2023 Rainfall totals:

Sky Harbor Official Rainfall: 4.21" (-3.01" from average)

Valley Average (Phoenix Rainfall Index): 5.47"

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Daily rainfall reports from all across the Valley can be found here.

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PHOENIX IS GETTING DRIER - LOWER RAINFALL AVERAGES NOW

Average Monsoon Rainfall in Phoenix (1981-2010): 2.71" of rain

NEW Average Monsoon Rainfall in Phoenix (1991-2020): 2.43" of rain

Average Yearly Rainfall in Phoenix (1981-2010): 8:03" of rain

NEW Average Yearly Rainfall in Phoenix (1991-2020): 7.22" of rain

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