Cochise, Graham and Greenlee — will start the week with a red flag warning, the National Weather Service in Tucson says.

A weather system is expected to move across the Tucson area this weekend, bringing a slight chance of rain and dropping high temperatures to the low 70s.

The National Weather Service issued red flag warnings on Feb. 28 for Maricopa, Pima, Pinal, Graham, Greenlee, Santa Cruz and Cochise counties.

Two major weather systems will bring mixed conditions across much of Arizona, with snow in Flagstaff, wind in Phoenix and possible rain in Tucson.

After months of dry weather, Arizona residents woke to a rare sight Friday morning: rainy skies and snowy streets. But early spring storms across the state won’t erase one of the worst short-term droughts on record.

The National Weather Service issued dust storm warnings for Maricopa, Pima and Pinal counties on March 1. Red-flag warnings continue through March 1 as well.