Can’t take the heat, Boise? Bad news — it’s not going anywhere. Weather Service explains
The National Weather Service issued a heat advisory for most of Southwest Idaho on Monday, when temperatures surpassed 100 degrees.
That advisory is lasting all week.
The heat wave is expected to continue through at least Sunday, with temperatures reaching or nearing 100 every day in Boise and the Treasure Valley, according to Dave Groenert, a Boise-based National Weather Service meteorologist.
Not only will it get very hot during the day, but it won’t cool down as much at night. Normal Boise temperatures dip into the low 60s at night this time of year, Groenert said, but it is expected to stay in the mid-70s this week.
“Last night, we only got down to 74 degrees,” he told the Idaho Statesman on Wednesday. “So it’s a combination of 100 degrees during the day and then (not) being able to cool off overnight. That combination that can really take a toll on people.
“Finding cool spots, especially during the heat of the day, but also being able to cool down overnight, is important.”
What’s the culprit for this heat wave? It’s coming from an area known as the Four Corners, where Colorado, Utah, Arizona and New Mexico meet in the Southwest, said Groenert. A heat dome is perched above that area and pushing hot, dry air into much of the West.
“The center of the high pressures around the Four Corners area directs the circulation clockwise,” Groenert said. “It directs the flow around that and up into our area. That can turn the heat up and draws the moisture into our area.”
Wednesday featured some cloud cover early in the day, keeping temperatures down, but by 5 p.m., it was 99 degrees in Boise. The National Weather Service forecast for the week calls for highs of 100 on Thursday, 99 on Friday and 101 on Saturday, with plenty of sunshine each day.
