Monsoon storms south of Phoenix brought dust and high winds to the Valley on Thursday night, officials said. The National Weather Service attributed the conditions to outflow boundaries from thunderstorms producing gusts up to 73 mph and patchy blowing dust, with similar activity expected to continue through the weekend.
The National Weather Service (NWS) in Phoenix said a more active monsoonal pattern is expected to develop over the Desert Southwest, particularly through the weekend and into next week. While storm activity through Saturday will mainly remain over the higher terrain of eastern and southeastern Arizona, outflow boundaries from these thunderstorms could reach the lower deserts and produce gusty winds and patchy blowing dust, officials said. This setup has already resulted in severe dust and wind conditions south of Phoenix, with multiple reports describing monsoon storms pushing walls of dust into the Valley.
At Phoenix Sky Harbor International Airport, wind gusts over 65 mph were recorded over a two-hour period Thursday night, including peak gusts of 71 and 73 mph, according to official records.
Fox Weather reported that a strong to severe thunderstorm just south of Phoenix likely produced wind gusts between 50 and 80 mph, generating a dust storm that affected the region. These extreme winds prompted the National Weather Service to issue a Dust Storm Warning for parts of the metro area during the event. Additionally, a blowing dust advisory was issued for a large portion of Arizona, including areas between Tucson and Phoenix, in effect from 5 p.m. to 11 p.m. Saturday, according to Fox 10 Phoenix.
Visibility problems caused by blowing dust were reported especially in the East Valley, where drivers faced hazardous conditions. The National Weather Service warned that dust-related visibility could drop to less than a quarter of a mile during stronger dust events. The storm also produced multiple hazards simultaneously, including heavy rain, lightning, hail, and localized flooding. A flash flood warning was issued for an area south of Casa Grande, and a flood advisory was in effect west of Gila Bend, highlighting the varied impacts of the monsoon activity.
The storm’s impacts extended beyond weather conditions. Fox Weather reported thousands of power outages across Maricopa County and flight diversions at Phoenix Sky Harbor International Airport. The airport experienced two ground stops in one evening due to high winds and poor visibility, according to Fox 10. The severe weather also caused the temporary suspension of an Arizona State University football game during one of the storm episodes.
Rainfall amounts in the Phoenix metropolitan area during the monsoon event ranged from a trace to three-tenths of an inch, with some locations on the southwest and southeast edges of the Valley receiving higher totals, according to local weather updates. Despite the relatively modest rainfall in the city center, the monsoon storms contributed to localized heavy rain in surrounding areas, leading to concerns about flooding in washes and low-lying regions. The National Weather Service and local reports emphasized that the main visible impact in the Valley would likely be wind-driven dust rather than widespread rainfall.
Forecasts indicate that the active monsoon pattern will continue through the weekend and into the following week. Fox Weather noted an increase in shower and thunderstorm activity was expected through Saturday before drier conditions return. Breezy conditions are forecast statewide, with Phoenix experiencing gusts of 15 to 25 mph on Thursday and Friday, according to one forecast cycle reported by Fox 10. Another update indicated that winds should remain under 30 mph as the storm setup weakens. The overall forecast suggests intermittent storm outflows rather than a continuous all-day storm in the Phoenix area.
Officials have advised residents to prepare for the monsoon season by keeping flashlights with extra batteries on hand, maintaining a supply of food that does not require cooking or refrigeration, and having at least one gallon of clean water per person per day. Backup power for medical devices and cell phones is also recommended. Safety guidance includes avoiding driving into flooded roadways, steering clear of washes, seeking higher ground if water levels rise, and not approaching downed power lines due to the risk of energized ground extending up to 200 feet. Pet owners were advised to keep animals indoors during storm events.
The current monsoon pattern reflects typical seasonal activity in the region, with thunderstorms primarily developing over higher terrain but producing outflow winds and dust that affect the lower deserts. The combination of gusty winds, blowing dust, localized heavy rain, and flooding hazards is consistent with previous monsoon episodes in the Desert Southwest. The National Weather Service continues to monitor the evolving weather pattern and will issue updates and warnings as necessary throughout the weekend and into next week.
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