Arizona weather forecast: High heat gives way to rain and cooler temperatures

Storms expected this weekend across Arizona

Although monsoon season is over, fall storms are making their arrival this weekend. FOX 10's Erica Horvatin has the latest.

PHOENIX - Thursday stood out as the warmest day of the week across Arizona, with Phoenix recording a high of 104 degrees.

Tonight & Tomorrow:

The state remained mostly dry, except for a few isolated showers and thunderstorms that popped up over the White Mountains. That rainfall wrapped up early in the evening, leaving clear and dry conditions for the overnight hours as temperatures in Phoenix dip to around 80 degrees.

Friday will bring another unseasonably warm afternoon, with Phoenix climbing to a high of 103 degrees. While warm conditions persist, isolated afternoon and evening showers and thunderstorms will be possible along the Mogollon Rim, Kaibab Plateau, and Bradshaw Mountains.

Chances For Rain:

A major weather pattern shift begins Saturday as tropical moisture tracks into the Southwest.

Scattered showers and thunderstorms could develop as early as mid-morning across local deserts and mountain areas. Thick cloud cover will hold across Arizona as waves of rain move through, keeping conditions significantly cooler. Phoenix is expected to top out at around 90 degrees, while high country communities cool into the 60s and 70s.

Sunday is expected to be the wettest day of the weekend, featuring repeated rounds of scattered showers and thunderstorms from morning to night. Winds will turn gusty at times, with peak wind gusts reaching 50 mph in Flagstaff and 35 to 40 mph in Phoenix.

Looking Ahead:

High rain chances will persist across the state on Monday and Tuesday before a drier weather pattern returns on Wednesday. Phoenix temperatures will fall into the 80s on Sunday and drop into the 70s by Tuesday and Wednesday.

Phoenix weather: Weekend rain on the way

Meteorologist Krystal Ortiz tracks triple-digit heat before tropical rain arrives in Arizona over the weekend.

You can always check the latest weather conditions by visiting the FOX 10 Phoenix weather page, or download the Free FOX 10 Weather app, which is available on Apple iOS and Android.

Scroll down this page for satellite and radar, day planner, records, current temperatures, 10-day forecast, forecast highs, and recent rainfall totals, plus live video feeds.

The following heat safety information was provided by the Scottsdale Fire Department.

What are Heat Emergencies?

Heat Cramps: Profuse sweating, fatigue, extreme thirst, muscle cramps

Heat Exhaustion: Headache, dizziness, weakness, nausea/vomit, Cool/moist skin

Heat Stroke: Elevated temp. +103degrees, confusion/irrational behavior, dry/hot skin, rapid shallow breathing, rapid weak pulse (shock), seizures, unconscious

What to do

Get person into shade or cool location.
Cool person with cool, wet cloths (neck, groin, armpits, head) and fan body.
Sip cool water if person is alert.
For muscle cramps, massage muscles gently, but firmly until relaxed.
*If symptoms worsen, call 911.

What not to do

Do not give anything by mouth if person is vomiting, unable to swallow or unconscious.
Do not underestimate the seriousness of a heat emergency.
Prevention/Preparation for hike/exercise in heat.

Know your limitations

Hydrate (begins day prior to hike/exercise, hour before hike, during and after).
Wear proper clothing, lightweight and light color, protect head, proper shoes.
Always carry a cell phone and best to hike with company.
Always tell someone where you are hiking and when to plan to return.