Warm summer weather should continue through the day on Sunday, but a low pressure system forming off the Pacific coast is poised to send a cold front and windstorm inland by Monday.
Highs will reach about 80 in Spokane today, 90 on Saturday and 85 on Sunday.
Sunny conditions will switch over to partly sunny skies Sunday as the arriving low pressure system starts affecting the weather. There is a 30 percent chance of thunderstorms in Spokane on Sunday.
The National Weather Service has issued a hazardous weather outlook for winds of 20 to 30 mph across much of the Columbia Basin, including the Spokane and Coeur d’Alene areas.
In addition, a fire weather watch was issued for Monday for much of Eastern Washington, but not North Idaho.
The wind will be strong enough to kick up a dust storm Monday evening and spread any fires that might be started, forecasters said.
The incoming storm will be accompanied by a 20 percent chance of showers in Spokane.
Temperatures on Monday and Tuesday will be markedly cooler with highs both days near 70. A warm up is expected with highs going to the middle 70s on Wednesday and lower 80s on Thursday.
The normal high for Spokane today is 77.