The National Weather Service in Tucson issued an urgent flash flood warning for South Central Pinal County on Sunday evening. Heavy thunderstorms near Arizona City produced significant rainfall, threatening rural roads and local streams until late that night.
Two inches of rain near Arizona City triggers immediate warnings
The National Weather Service in Tucson reported that Doppler radar indicated thunderstorms producing between 1 and 2 inches of heavy rain just south of Arizona City at 7:50 p.m. on Sunday, August 23. This sudden downpour created an immediate risk for several specific locations in the southeastern Arizona region.
According to the NWS statement, the flooding is expected to impact portions of south Sunland Gin Road, west Aries Drive, and south Sagittarius Street. The warning, which remained active until 10:45 p.m.. MST, specifically highlighted the danger to small creeks, urban areas, and low-lying underpasses that may be overwhelmed by the rapid influx of water.
How parched Arizona soil turns rain into rapid runoff
This weather event is part of a broader, dangerous pattern common to the Arizona desert landscape. Because desert soils often undergo extended dry spells, the surface can become almost waterproof , preventing the ground from absorbing moisture. This causes rainfall to transform into immediate, violent runoff rather than soaking into the earth.
Topography further complicates these monsoon-driven events. Steep canyons and dry washes act as natural funnels, concentrating water into sudden surges. Furthermore, areas previously impacted by wildfires are at an even higher risk, as burned topsoil is significantly less capable of absorbing water, leading to even more unpreidctable and dangerous flash flooding.
Why 12 inches of water can swallow a vehicle
Emergency officials are stressing the importance of the "turn around, don't drown" directive to prevent vehicle-related fatalities. The National Weather Service warns that even a small amount of moving water is deceptively powerful. For pedestrians, just 6 inches of floodwater can be enough to sweep a person off their feet.
The danger to motorists is even more pronounced.. The NWS notes that:
- 12 inches of water can carry away smaller vehicles.
- 2 feet of water is sufficient to sweep away SUVs and trucks.
Since most flood-related deaths occur when people attempt to drive through inundated streets, authorities urge residents to find alternative routes rather than testing the depth of a flooded road.
What remains unverified about the Greene Wash surge
While the current warnings provide specific details for locations like Sunland Gin Rd at Greene Wash, several critical pieces of information remain unconfirmed. It is currently unknown how much additional rainfall will hit the surrounding southeastern Arizona counties or if the storm's path will expand to include more remote rural areas.
Additionally, the report does not clarify if the specific rainfall totals recorded near Arizona City are being mirrored in upstream areas, which could lead to even larger surges in the washes. Residents sholud remain cautious, as the full extent of the storm's impact on local drainage systems has yet to be fully assessed by meteorologists.
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