The thermometer topped 70 degrees at Ted Stevens Anchorage International Airport on Thursday for just the third time this summer. Other part of Southcentral were even warmer, with widespread 70 degree temperatures throughout the Matanuska and Susitna Valleys.

Temperatures are forecast to climb into the 60s and 70s again on Friday in Southcentral, but a cooler, damp pattern is on the way for Saturday.

Widespread rain will move into the region beginning early Saturday morning, spreading from east to west across Southcentral, and continuing into the evening hours.

The rain will be heavy at times, and accompanied by southerly wind gusts of up to 35 miles per hour through Turnagain Arm and the Anchorage bowl. A half inch of rain or more may fall in Anchorage on Saturday, with higher amounts expected for the Mat-Su and the Copper River Basin.

“Ponding of water, rapid local stream rises, and water runoff are a possibility where heavy rainfall occurs,”according to a statement from the National Weather Service.

Rainfall will come to an end by early Sunday morning, with drier conditions and partial clearing expected by late in the day.