New round of monsoon storm brought flooding to parts of the Valley

New round of monsoon storm brought flooding to parts of the Valley


A new round of monsoon weather has brought windy conditions, as well as lightning and flooding from rainfall to parts of the Valley late in the night of July 22.

Besides rain and wind, some Valley roadways were also flooded as a result of the storm.

As a round of monsoon storms hit the Phoenix area Thursday night, SRP reported a number of power outages throughout their service areas in the Valley. Most of the outages are centered in Scottsdale, Tempe, and Mesa. APS officials are also reporting power outages at multiple sites in the Phoenix area.

Flash Flood Watch issued

Earlier in the day, a Flash Flood Watch was issued for 12 Arizona counties, including Maricopa County. The advisories are set to last throughout the weekend, as an incoming weather system is expected to bring heavy rain and thunderstorms across large swaths of central and southern Arizona.

The following counties are affected:

    Gila, Yavapai from July 22 at 11 a.m. until July 24 at 11 p.m.

    Apache, Coconino, Navajo from July 22 at 12 p.m. until July 25 at 12 a.m.

    Maricopa, Pinal from July 22 at 5 p.m. until July 24 at 11 p.m.

    Cochise, Graham, Greenlee, Pima, Santa Cruz from July 22 at 6 p.m. until July 24 at 11 p.m.

The expected rainfall could cause flash flooding in washes and areas with poor drainage systems. This is particularly an issue in areas with past burn scars from wildfires, which will be "especially prone to flash flooding and debris flow," according to the National Weather Service.

In Northern Arizona, the National Guard is stepping in, as flash flooding continues to impact communities affected by the Museum Fire.

The fire, which burned in 2019, left burn scars in the area.

Lt. Andrew Smith says the guard will be there for a week, and that time period can be extended.

With more rain expected, crews are making preparations.

"We put an additional almost 10,000 sandbags out just yesterday. We put in jersey barriers to stabilize channels, so that’s really just to help keep those flows into those channels so they don’t disperse out into the community," said Andy Bertelson, Flagstaff's Public Works Director.

The flooding has so far cost $4 million in damages, and there is a lot of work to be done to rebuild infrastructure in the area.

Arizona Gov. Doug Ducey issued a Declaration of Emergency in response to ongoing flooding in the Flagstaff area, which has been affected on a daily basis by heavy rain and storms.

Many places in the state have received more rain in the past month than in the entire 2020 monsoon season, which ran from mid-June through September, the weather service said.

Rain/flood safety tips

The American Red Cross' tips for heavy rain situations and flood safety:

  • Turnaround don’t drown! If you must drive and you encounter a flooded roadway, turn around and go another way.
  • If you are caught on a flooded road and waters are rising rapidly around you, get out of the car quickly and move to higher ground.
  • Tune in to your local radio, NOAA radio, or news channels for the latest updates.
  • If your neighborhood is prone to flooding, be prepared to evacuate quickly.
  • Follow evacuation orders and do not attempt to return until officials say it is safe.
  • If power lines are down, do not step in puddles or standing water.
  • If power is out, use a flashlight. Do not use any open flame as alternate lighting.