An area of low pressure moving across the western states resulted in waves of rainfall across the region during the day on the 15th. A round of widespread light to locally moderate rainfall activity was observed during the morning hours followed by a more significant round with thunderstorms during the evening hours in association with a cold front. Moisture levels associated with this low pressure system were in the 99th percentile for mid-March, signifying that environment was favorable for heavier rainfall rates to materialize. As a result of the heavier rainfall activity observed during the evening hours, flooding was observed across the Wickenburg area in northwestern Maricopa County, where over an inch of total rainfall was observed. Flooding was also observed along the low-water crossings that intersect the Hassayampa River, which runs from north to south along the western third of Maricopa County. Strong storms were also observed during the afternoon hours across southwestern Arizona, producing isolated gusts around 60 mph in the Yuma area.

Flood in MARICOPA, ARIZONA
From 16-MAR-23 00:00:00 to 16-MAR-23 13:00:00 (MST-7)
Location: TONTO BASIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Patton Road between 293rd Ave and Douglas Ranch Rd was closed due to flooding from the overflow of the Hassayampa River. A Maricopa County Flood Control District Gauge located 11 miles upstream registered flows going above alarm stage, which is 9.0 feet, at 21:50 MST on 3/15, peaking at 9.81 feet (2011 cfs) at 23:30 MST. The flow went below alarm stage at 10:58 MST on 3/16. No damages or injuries were reported.

Flood in MARICOPA, ARIZONA
From 16-MAR-23 07:00:00 to 16-MAR-23 20:00:00 (MST-7)
Location: DIXIE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Baseline Rd between Johnson Rd and 331st Ave was closed due to flooding from the overflow of the Hassayampa River. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-MAR-23 21:30:00 to 15-MAR-23 22:30:00 (MST-7)
Location: WICKENBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Portions of Jack Burden Rd in Wickenburg closed due to flooding. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-MAR-23 20:03:00 to 15-MAR-23 22:03:00 (MST-7)
Location: WICKENBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

A Maricopa County Flood Control District Gauge at Casandro Wash in Wickenburg registered flows going above alarm stage, which is 2.2 feet, at 20:03 MST. The flow reached a peak of 4.76 feet (343 cfs) at 20:30 MST and went below flood stage by 22:03 MST. This likely contributed to flooding along the inflow to Casandro Dam as well as small road crossings that intersect the wash. No damages or injuries were reported.

Flood in MARICOPA, ARIZONA
From 16-MAR-23 07:00:00 to 16-MAR-23 11:00:00 (MST-7)
Location: NEW RIVER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Old Stage Rd Northbound at New River Rd was closed due to flooding. No damages or injuries were reported.

Flash Flood in MARICOPA, ARIZONA
From 15-MAR-23 21:30:00 to 15-MAR-23 22:30:00 (MST-7)
Location: MATTHIE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Portions of Vulture Mine Rd in Wickenburg closed due to flooding. No damages or injuries were reported.

Flood in MARICOPA, ARIZONA
From 16-MAR-23 07:00:00 to 16-MAR-23 20:00:00 (MST-7)
Location: BUCKEYE MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Tonopah Salome Highway between 327th Drive and 315th Avenue was closed due to overflow from the Hassayampa River. No damages or injuries were reported.

Thunderstorm Wind in YUMA, ARIZONA
From 15-MAR-23 17:12:00 to 15-MAR-23 17:12:00 (MST-7)
Location: MARINE AIR STATION
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The Yuma Auxiliary Airfield Station measured a 60 mph gust.