Record highs expected Saturday, Sunday during a possible week of 100-degree weather

When the Plain White T’s hit the main stage at the sixth annual Boise Music Festival Saturday afternoon, fans may want to take the hint and dress in white T-shirts.

Record temperatures are expected by Saturday, with thermometers climbing above 100 degrees.

“It looks like our really hot weather will be over the weekend and probably on Monday and Tuesday as well,” said Joel Tannenholz, a meteorologist with the National Weather Service in Boise.

The Weather Service forecast doesn’t go beyond Tuesday, but the Weather Channel and other forecasters are predicting temps in the 100s through at least next Thursday.

With 4,500 youth soccer players and an estimated 15,000 spectators in Boise this week for the US Youth Soccer Far West Regional Championships, sunscreen could be in short supply. Those attending the third annual Pet-A-Palooza at Julia Davis Park on Saturday may want to bring extra-large water bowls for their dogs.

Organizers ordered misters to cool people at the daylong Boise Music Festival. Trees will offer shade in the northeast corner of the festival site at the fairgrounds; water sprays will wet people down. An air-conditioned Expo Idaho building will be open to give festivalgoers a respite.

“Obviously, it’s going to be hot Saturday,” said Kevin Godwin, an official with Townsquare Media, the radio station company organizing the festival. He noted that the festival had really hot weather in 2012: “The year we had LL Cool J, it was like 105. It’ll be fine.”

The high temperature recorded at the Boise Airport on the day of the 2012 festival, on July 7, was 100.

Fire managers at the National Interagency Fire Center in Boise are bracing for a front expected to come north through the Sierras in California into Oregon and Washington this weekend, bringing with it lightning and wind. Once in the Pacific Northwest, it’s expected to turn east, giving the Bureau of Land Management’s new plan for fighting desert wildfires to protect sagebrush habitat its first test, said Ron Dunton, BLM’s new assistant director for Fire and Aviation at NIFC.

The Weather Service predicts record highs in Boise on Saturday and Sunday. The thermometer at the Boise Airport is expected to reach 103 on Saturday, which would break the record of 101 degrees set in 2006. On Sunday, a 106-degree high temperature would break the old record of 102, set in 2010.

Caldwell resident Robin Howard says he plans to do his lawn work and watering Saturday “very early in the morning, then chill out the rest of the day.”

Emmett resident Diane Lake Wright said she plans to stay indoors: “It sounds like a great opportunity to see back-to-back movies at the theater.”

Lois Russell, whose family has operated a dairy farm in Emmett for decades, said she’ll still have to go out and milk cows. “I will have to break out the misters,” she said. “They seem to like that, along with the giant fans.”

Monday’s predicted high of 104 would fall one degree short of the record for that date, set in 2008, according to Weather Service records.

This time of year, the normal high is 84 degrees, the low 56. Temperatures are expected to remain above average for at least the near future, Tannenholz said.

Anything above 89 is considered above average in July, Tannerholz said. But temps in the 90s and even 100s are not uncommon.

In an average summer, there are 51 days with temperatures in the 90s or higher and eight days above 100 degrees, he said.

“We get our hottest weather in late June and early July,” Tannenholz said. “This time of the year, you have the longest days and the highest sun angle, so that’s in favor of getting really hot temperatures.”