Thunderstorm activity today will be limited, with the best chances (10-20%) in the Sky Islands. Otherwise, there is still enough moisture for scattered cumulus & passing cirrus clouds, with high temperatures near normal. Storm chances (10-40%) increase Sunday, with the best chances along the International Border and areas east of Tucson in Graham, Greenlee, and Cochise counties. Any storms that form this weekend, the primary impacts will be locally heavy rainfall with isolated flash flooding.