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Last Map Update: Thu, Aug 20, 2026 at 11:46:22 am MST

Watches, Warnings & Advisories

National Weather Service NWS Flagstaff, AZ

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National Weather Service Albuquerque, NM

National Weather Service NWS Tucson Arizona

Extreme Heat Warning

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Thunderstorm Chances Today

Extreme Heat Warning

Temperature Forecast

Weather Outlook

Another round of scattered showers and thunderstorms is expected this afternoon and evening. Activity will again initially develop across the AZ higher terrain in N, E, and SE AZ during the afternoon. The showers and storms will then likely fail to push into the lower deserts this evening with chances of less than 20% surviving into the lower deserts. Strong winds (greater than 35mph) will be the main concern. Frequent lightning and locally heavy rainfall are also expected with any storms.

Strong high pressure over the Desert Southwest will lead to abnormally hot temperatures through the weekend with temperatures up to 5-7°F above average and Major HeatRisk across much of the lower deserts. An Extreme Heat Warning is in effect through Sunday evening for the lower deserts of AZ and southeast CA along with the San Carlos area in southern Gila County.

Afternoon highs across the lower deserts will be several degrees above daily normals through the weekend. Overnight lows in the 80s and lower 90s will be common, resulting in little relief. Areas of major HeatRisk will continue with Extreme Heat Warnings remaining in effect through Friday.

Daily thunderstorm activity is expected to continue into early next week across the AZ higher terrain in N, E, and SE AZ. Thunderstorm activity across the lower deserts will be limited (< 20% chance) through at least Saturday. However, strong gusty outflow winds will still be possible and could cause some areas of blowing dust. Thunderstorm chances increase slightly by the end of the weekend and beginning of next week. Temperatures several degrees above normal will continue into next week with areas of Major HeatRisk across much of the lower deserts. An Extreme Heat Warning remains in effect through Sunday night.