Flash flood warnings issued for Pima County

The National Weather Service has issued flash flood warnings for Pima County starting at 4:20 p.m. July 25. The warnings expire at 11:15 p.m. July 25.

Doppler radar indicated thunderstorms had produced heavy rainfall across the western portions of the Tucson area this evening, with automated rain gauges reporting the heaviest rainfall between 1.25 and 1.75 inches extending from just east of Reid Park northward to the Catalina Foothills. Flash flooding is ongoing across portions of the Tucson area this evening.

Life-threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses is possible.

Some locations that will experience flash flooding include Tucson, Catalina, Oro Valley, Marana, Davis-Monthan Air Force Base, Casas Adobes, Drexel Heights, Flowing Wells, Tanque Verde, South Tucson, Pascua Pueblo Yaqui Reservation, Tortolita, San Xavier Community, Mount Lemmon/Summerhaven, Catalina Foothills, Sabino Canyon Recreation Area, Tucson International Airport, Catalina State Park, Tucson Mountain Park and Summit, Saddlebrooke, and Oracle Junction..

This includes the following flash flood-prone locations: Harrison Rd at Pantano Wash, Agua Caliente Wash from Soldier Trail to Ft Lowell, Country Club Rd at Franco Wash, Wentworth Rd at Tanque Verde Wash, Tanque Verde Loop Rd at Tanque Verde Wash, Old Spanish Trl at Rincon Creek, Santa Clara Ave at El Vado Wash, Escalante Rd at Atterbury Wash, 1st Ave north of Fort Lowell Rd, Stone Ave at Mabel St, Alamo Wash between Speedway and Grant, Silverbell Rd near Ina Rd, Camino De La Tierra at the Rillito River, Camino de Oeste from Sweetwater to Gates Pass, Drexel Rd east of Alvernon Way, Freeman Rd between Broadway and Old Spanish Trail, Ironwood Hills Dr from Shannon to Camino de Oeste, Limberlost Rd from Soldier Trail to Homestead Ave, Mark Rd from Jeffery Rd to Los Reales Rd, Mission Rd from Valencia Rd to San Xavier Rd, Old Vail Connection Rd at Franco Wash, Overton Rd at Canada del Oro, Snyder Rd from Kolb Rd to Sabino Canyon Rd, Sunset Rd west of Camino de Oeste and Black Wash at S Camino de Oeste, Suizo Rd at Cadillac Wash.

This includes the following highways: Interstate 19 between mile markers 54 and 63; State Route 86 between mile markers 163 and 171; State Route 77 between mile markers 70 and 84; Interstate 10 between mile markers 240 and 277; State Route 79 between mile markers 92 and 104; State Route 77 between mile markers 85 and 91; Interstate 10 near mile marker 232 and between mile markers 236 and 239.

Doppler radar also indicated thunderstorms had produced between 1.50 and 3 inches of rain across the eastern slopes of the Catalina Mountains. An automated rain gauge in Alder Canyon reported 1.97 inches with this storm. Flash flooding is ongoing, especially along drainages that fill into the San Pedro River. This flash flooding will especially impact drainages that cross Redington Road north of Redington toward San Manuel.

Some locations that will experience flash flooding include San Manuel and Redington.

This includes the following flash flood-prone locations: River Rd at San Pedro River.

This includes the following streams and drainages: San Pedro River, Stratton Wash, Buehman Canyon, Gibb Wash, Bollen Wash, Chimney Rock Creek, Alder Wash and Redfield Canyon.

Doppler radar also indicated between 1.50 and 2.50 inches of rain has fallen in Redington Pass between the Catalina and Rincon mountains. An automated rain gauge at Alamo Tank reported 1.89 inches has fallen with another gauge at 1.50 inches on Bellota Ranch Road.

Rainfall runoff will continue to drain into the upper reaches of both the Agua Caliente Wash and Tanque Verde Washes.

Flash flooding is ongoing, especially in the drainages that drain into the Agua Caliente and Tanque Verde washes and portions of Redington Road.

Some locations that will experience flash flooding include Tucson and Tanque Verde.

This includes the following flash flood-prone locations: Agua Caliente Wash from Soldier Trail to Ft Lowell, Wentworth Rd at Tanque Verde Wash, Tanque Verde Loop Rd at Tanque Verde Wash and Limberlost Rd from Soldier Trail to Homestead Ave.

This includes the following streams and drainages: Tanque Verde Wash, Chimney Rock Creek and Agua Caliente Wash.

Doppler radar also indicated between 1 and 2 inches of rain have fallen into the Rincon Creek basin along the southern portions of the Rincon Mountains. Flash flooding is ongoing, especially along Rincon Creek as it passes Camino Loma Alta and downstream to Old Spanish Trail.

Some locations that will experience flash flooding include Tucson, Vail and Saguaro National Park East.

This includes the following flash flood-prone locations: Camino Loma Alta at Rincon Creek.

This includes the following streams and drainages: Agua Verde Creek, Ash Creek, Mescal Arroyo, Pantano Wash, Cienega Creek, Paige Creek, Coyote Wash and Rincon Creek.

Doppler radar also indicated thunderstorms producing a broad area of between 1.50 and 3 inches of heavy rain that extends from east of the intersection of Nogales Road and Pima Mine Road, south to Sahuarita, then southwest to Twin Buttes Road west of Interstate 10. Flash flooding is ongoing.

Some locations that will experience flash flooding include Tucson, Sahuarita, Green Valley, east Sahuarita and Summit.

This includes the following flash flood-prone locations: Country Club Rd at Franco Wash and Old Vail Connection Rd at Franco Wash.

This includes Interstate 19 between mile markers 38 and 51.

This includes the following streams and drainages: Santa Cruz River, Demetrie Wash and Box Canyon Wash.

Doppler radar also indicated thunderstorms producing heavy rain across western Pima County. Radar estimated that between 1 and 2 inches of rain has fallen west and southwest of San Simon and east of Highway 85 south of Why to the International Border. Flash flooding is ongoing or expected to begin shortly, especially along the washes that drain into San Simon Wash, Alamo Wash and Kuakatch Washes. Portions of Highway 86 between San Simon and Why and Highway 85 south of Why are likely impacted.

Life-threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses is possible.

Some locations that will experience flash flooding include GuVo, Hickiwan, Organ Pipe Cactus National Monument, San Simon, Why, Gunsight, Charco 27, KuKatch, San Simon West and Lukeville.

This includes the following flash flood-prone locations: Gunsight Wash in Gunsight.

This includes the following highways: State Route 85 between mile markers 50 and 79; State Route 86 between mile markers 53 and 77.

This includes the following streams and drainages: San Simon Wash, Hickiwan Wash, Cuerda de Lena, Alamo Wash, Kuakatch Wash, Pia Oik Wash, Pisinimo Wash, Growler Wash, Siovi Shuatak Wash, Gunsight Wash, Sikort Chuapo Wash, Vamori Wash, Ali Chuk Wash and Gu Vo Wash.

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For the latest watches and warnings, see our weather alert page .

Tips for flood weather

Officials offered the following tips for residents to prepare for approaching storms and potential flooding threats.

• Protect your property from floodwaters and purchase flood insurance.
• Plan for sheltering where you are and for evacuation.
• Evacuate if advised.
• Seek high ground (for flash floods) or stay on high ground.
• Avoid walking or driving in floodwaters. Depth and velocity of the water are not always obvious; the ground or road may suddenly wash away and hidden dangers may exist; do not attempt to evacuate through floodwaters.
• Know how to avoid injury from debris, contaminated water, carbon monoxide poisoning, electrocution, and damaged buildings and infrastructure.
• Seek professional review or inspection of structures and utilities before entering buildings that are flooded.

This article was generated by The Arizona Republic and USA TODAY Network using data released by the National Weather Service. It was edited by a staff member.

This article originally appeared on Arizona Republic: Flash flood warnings issued for Pima County