In Mexico, Isis destroyed over 700 houses and killed 14 people; this is primarily due to its heavy rainfall which peaked at over 20 inches (510 mm) in southern Baja California Sur.

Moisture from the remnants of Isis extended into the southwestern United States, resulting in light rainfall, dozens of traffic accidents, and power outages to thousands of residents in San Diego County, California.

Late on September 1 it intensified into Tropical Storm Isis while located about 200 miles (320 km) south of Cabo San Lucas.

[2] Upon becoming a tropical storm, the deep convection was not organized, causing one forecaster to describe Isis as a large monsoon-like system.

[2] Very deep, symmetrical convection developed over the poorly defined center of circulation while banding features began to form, although ill-defined outflow and land interaction with the Baja California Peninsula initially prevented further strengthening.

[4] At 1200 UTC on September 2, Isis made landfall on extreme southeastern Baja California Sur as a strong tropical storm, and subsequently turned to the north-northeast.

[2] After entering the Gulf of California, an eye began to become apparent on visible satellite imagery, and it is estimated Isis attained hurricane status late on September 2.

Isis weakened to a tropical storm a few hours after landfall, and subsequent to turning to the north-northwest the low-level circulation dissipated over Sierra Madre Occidental.

[5] Coinciding with the National Hurricane Center's first advisory on Isis, the government of Mexico issued a tropical storm warning from Dolores to Puerto Cortés along the Baja California Peninsula.

[9] Rainfall reached over 10 inches (250 mm) in the coastal region of Jalisco, and lighter amounts of precipitation extended further to the southeast and northeast.

[2] Strong waves from the hurricane struck the Mexican mainland, with four people injured at Mazatlán when their boat washed onto rocks and was destroyed.

[15] Slick roads from the rain resulted in nearly 80 traffic accidents in San Diego County, ranging from fender benders to moderate injuries.

Thunderstorms from the remnants of Isis damaged a San Diego Gas & Electric substation at Kearny Mesa, leaving 10,000 customers without power; the outage was short lived and completely restored within two hours.

[16] Heavy clouds from Isis produced scattered rainfall and temporary relief to severe heat conditions in the Los Angeles area.

[17] Moisture from the remnants of Isis spread across the southwestern United States, and rainfall reached over 0.75 inches (19 mm) in Nevada and Utah.

More than 650 health workers worked to combat the spread of diseases, including monitoring sanitary conditions of water and foods, and sprayed nearly 9,900 acres (40 km2) of land to prevent the breeding of mosquitoes.

The damage to the federal highway between Culiacán and Los Mochis along the coastal region of Sinaloa was restored about 48 hours after the passage of the hurricane.