Tucson, Arizona Under Flood Watch as Tropical Moisture Threatens Up to 3 Inches of Rain Through Monday

TUCSON, ARIZONA — Heavy tropical moisture is moving into southern Arizona this weekend, prompting the National Weather Service (NWS) in Tucson to issue a Flood Watch through Monday evening for multiple counties, including Pima, Cochise, and Pinal.

Forecasters warn that areas from Tucson Metro to Nogales, Sierra Vista, and the Catalina and Rincon Mountains could see significant rainfall totals and localized flooding, especially in low-lying and mountainous areas.

Rainfall Totals and Timing

According to the NWS Tucson, widespread showers and isolated thunderstorms are expected to develop Saturday afternoon and persist through Monday night.

Meteorologists project rainfall amounts between 1 and 3 inches, with higher totals possible in mountain regions. The most intense rainfall is expected late Sunday into early Monday, when tropical moisture peaks.

“Excessive runoff could lead to flooding of washes, creeks, and roadways,” NWS officials warned. “Residents should stay alert for rapidly changing conditions and possible Flood Warnings.”

Flood-Prone Zones and Safety Precautions

Officials say flooding is most likely along the Santa Cruz Valley, Gila River, and Altar Valley, where creeks and washes are already running high from recent rains.

Residents in these areas are urged to avoid driving across flooded roads, secure outdoor items, and be ready to move to higher ground if conditions deteriorate.

“It only takes a few inches of moving water to sweep away a vehicle,” safety officials emphasized. “Turn around, don’t drown.”

The Arizona Department of Transportation (ADOT) is also monitoring major highways, including Interstate 10 and Highway 86, for possible closures due to high water or debris flow.

Extended Outlook

The Flood Watch remains in effect through Monday evening, but meteorologists say additional advisories may be issued if rainfall intensifies across southern Arizona.

By Tuesday, drier conditions are expected to gradually return, though scattered showers could linger across the mountain foothills.

As the storm system moves through the region, residents are encouraged to monitor official weather updates from the National Weather Service and local emergency alerts. For ongoing storm coverage and Arizona weather news, visit ChicagoMusicGuide.com.