Heat Wave

Scott Graf / Boise State Public Radio

UPDATED: The National Weather Service reports Boise hit 110 degrees shortly after 4:00 p.m. Monday.  Since record keeping began, the highest temperature ever recorded in Boise is 111. Monday's high broke the previous record by a whopping six degrees.

Adam Cotterell / Boise State Public Radio

Sunday saw record high temperatures for much of southwest Idaho and eastern Oregon. In Boise it got to 91 degrees. That unusual heat brings a chance of thunderstorms for much of this week. But the temperature won’t stay at record levels long. Later in the week highs will likely drop to the 50s. 

Jay Briendenbach, the Warning Coordination Meteorologist at NOAA's National Weather Service Office in Boise, says a system of high pressure ridges and troughs is circulating hot and cold air around the country quickly.