Gila/Salt Intermediate Basins

Phoenix area received 1.1 inches of precipitation through October 27, running 0.6 inches above the normal 0.55 inches by this date. This surplus follows a drier-than-normal 12-month period ending September 2026, when the county received 8.5 inches against a normal of 9.2 inches.

Baker Butte SNOTEL and Workman Creek SNOTEL, in the headwaters 105–111 km upstream, recorded water-year precipitation running 1150–1288% of normal as of October 26, setting up an exceptionally wet water year ahead. Flow at Skunk Creek near Phoenix remains at zero discharge today, indicating the upper-basin moisture has not yet translated to significant downstream streamflow.

Desert Blonde Tarantula sightings reached 11 observations in the past 30 days with the most recent on 2026-10-22, concentrated in northern Phoenix suburbs and Cave Creek. October activity marks the start of their fall mating season, when males actively search for mates above ground.

Severe drought coverage in Maricopa County dropped from 53.04% the week of October 6-12 to 31.72% the week of October 20-26. This improvement reflects recent rainfall and easing of water stress on terrestrial wildlife habitat, though abnormally dry conditions remain widespread across the county.

California barrel cactus displayed open flowers and ripe fruits on 2026-10-25. Continued reproductive investment in late autumn suggests favorable conditions for seed ripening despite the arid environment.

Extreme drought (D3) coverage in Maricopa County dropped from 20.85% in the week of 2026-09-29 to 2026-10-05 to 0.00% in the week of 2026-10-20 to 2026-10-26. The disappearance of the extreme drought category reflects improved moisture conditions as the county moves into autumn.

Rush-desert-milkweed showed flowers, open flowers, ripe fruits, recent fruit drop, and young leaves on 2026-10-26. The species continues its reproductive cycle into late October, with simultaneous flowering and fruit dispersal indicating sustained ecological activity under current drought-stressed conditions.

The Salt River near Roosevelt is running at 308% of normal on September 27, 2026, reflecting heavy monsoon runoff from the eastern highlands. High streamflow in Salt and upper Gila tributaries supports riparian habitat and helps offset the region's chronic water deficits downstream.

Nine federally listed species have mapped ranges overlapping the Gila/Salt Intermediate Basins, including five Endangered species: California least tern, desert pupfish, Gila topminnow, Southwestern willow flycatcher, and Yuma Ridgway's rail. Two Threatened species and one Proposed Threatened species also occur here, though no designated critical habitat overlaps the area.

Mean daily high at Phoenix Airport was 103.6°F for the 30 days ending September 27, 2.1°F above the 1991-2020 normal of 101.5°F. Mean daily low was 83.8°F, 5.1°F above normal, marking an exceptionally warm late summer in the region.