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Boise forecast: Excessive heat warning issued for Thursday and Friday

See the forecast of the total smoke in the atmosphere.

The National Weather Service Boise shows a simulated wildfire smoke forecast across the West for August 8-9, 2018.
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The National Weather Service Boise shows a simulated wildfire smoke forecast across the West for August 8-9, 2018.

Boise could set heat records over the next few days as highs in the area potentially hit 107 degrees Thursday and Friday, according to the National Weather Service.

An excessive heat warning was issued late Wednesday night that goes into effect Thursday afternoon and will last into Friday night.

“The challenge is all the smoke coming from northern California, and how much that will or will not dampen those high temperatures,” said Weather Service forecaster Elizabeth Padian. “If there was no smoke, we would be more confident of our high temperatures.

The record high for Thursday is 105, and that was set in 1875. The record high for Friday is also 105, though that was set in 1986.

A front out of the northwest on Saturday will knock temperatures down by 10 degrees. Highs will be in the low 90s over the weekend.

Surface winds will be out of the northwest Saturday but upper-level winds out of the southwest are expected to carry smoke into the Boise area on Saturday, so the weekend will be cooler but not necessarily smoke free.

Washington state health officials are urging residents to be prepared for smoky days with poor air quality as wildfire season heats up. Seniors, young children and people with existing respiratory problems are especially vulnerable.

Katy Moeller: 208-377-6413

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