A ridge of high pressure strengthens Tuesday and Wednesday over the Northwest, where temperatures over the past week have been far above average, and broken records.
Across the West temperatures climb into the 100s by Tuesday, bringing another wave of unbearable temperatures to the region.
Eastern Oregon, Nevada and Idaho might touch daily high records once again as daytime temperatures reach into the high 90s and triple digits.
The warm low temperature streak is coupled with a streak of seven days with high temperatures over 100 degrees. Boise is forecast to reach 100 degrees for the next three days, which would break the record of a nine-day streak of over 100-degree temperatures.
Excessive heat warnings are in place for much of eastern Oregon and western Idaho on Tuesday, in effect through the evening.
Northern Nevada, Northern California and Southern Oregon have heat advisories in place, where temperatures will be in the low triple digits.
The NWS in Pocatello, Idaho says that more heat watches and warnings will be likely for southern Idaho going into Tuesday. Red flag warnings are also in place for Friday, as temperatures begin to heat up once again along with a chance for scattered thunderstorms elevating the wildfire risk.
The heat will peak on Tuesday and Wednesday for most of the region before a front brings brief relief on Thursday. Temperatures will still be above average, but closer to the normal values.
After Thursday, the heat rises into the weekend for some parts of the West.
Weekend heat wave worrisome
Another ridge of high pressure centered over Nevada begins to build into the end of the week by Saturday and daily high temperatures soar into triple digits once again.
Eastern Washington, Oregon and Idaho could see daily highs threatened once again this weekend. Highs in Northern California will ramp up as well, with temperatures in the 100s and some exceeding 110s.
This summer has already proven to be scalding for the West. Drought conditions have deteriorated, and fire weather is making large fires burning in places like California significantly worse. Smoke over the Great Basin from large fires in California will be bothersome throughout the week.
Monsoon moisture this weekend has proven helpful for Arizona and New Mexico but has left the regions that most need it in the Northwest parched.
The heat wave over the weekend is expected to last throughout the next week. The prolonged hot conditions with little nighttime relief set up another dangerous week for the West.