PORTLAND, Ore. — Portland will endure the first heat wave, and hopefully the last of this intensity and duration, of summer starting July Fourth.
KGW is calling Thursday afternoon through Tuesday Weather Impact Alert Days due to temperatures that are forecasted to reach 95 degrees or higher.
KGW Chief Meteorologist Matt Zaffino said this is going to be a long-duration heat wave. Temperatures will reach or exceed 100 degrees for four straight days. Night-time temperatures in the upper 60s and low 70s over the weekend and Monday morning may also set records for the warmest overnight lows.
Portland's forecast high of 105 degrees for Saturday has only been reached or exceeded 14 times since records began in 1938.
When
Starting with the holiday on the Fourth of July, temperatures will rise into the mid-90s. The National Weather Service has issued an Excessive Heat Warning for portions of northwest and west central Oregon and southwest Washington from noon on Thursday until 11 p.m. on Sunday.
The hottest temperatures are expected over the weekend and at the beginning of next week. High temperatures will reach or surpass 100 degrees on Friday, Saturday, Sunday and Monday. All four days will likely set new records and Tuesday is a possibility. Here are the current records for high temperatures on those dates:
- July 5: 98 degrees (2023)
- July 6: 97 degrees (1960)
- July 7: 95 degrees (2010)
- July 8: 98 degrees (1952)
- July 9: 96 degrees (1985)
Impact
The weather impact of high temperatures potentially reaching and exceeding 100 degrees will increase the possibility of heat stroke, fatigue and dehydration.
Need
If you have outdoor plans for the holiday weekend, make sure you're planning to pack extra water and stay hydrated. Keep updated with daily forecasts as KGW meteorologists track the risk factor.
What are Weather Impact Alert days?
It’s our goal to make sure you have the most accurate and up-to-date information about the weather and its impact on you. The new KGW Weather Impact Alerts will be just that, alerts as far in advance as possible, so that you can be armed with accurate information to keep yourself and your family safe.
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