Your Monday, July 20, 2026 Monsoon Forecast: Desert Skies Prepare for Drama

Here is your Monsoon Outlook for Monday, July 20, 2026, provided by the US National Weather Service Flagstaff, Arizona . Graphic from U.S. National Weather Service Flagstaff, Arizona. Monsoon According to the US National Weather Service, Flagstaff, Arizona , An active monsoon day is expected across the region. In addition to a localized flash flood threat, there will also be a chance for some isolated strong to severe thunderstorms with hail up to 1″ diameter. Storms may continue well into