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 Monday Weather Impact Alert Days due to temperatures that are forecasted to reach 95 degrees or higher.
KGW Chief Meteorologist Matt Zaffino says this is going to be a long duration heat wave. Temperatures will reach or exceed 100-degrees for three straight days. Humidity will be low, however, and that will help offer at least a little night-time relief from the heat.
Portland's forecast high of 105-degrees has only been reached or exceeded fourteen times since records began in 1938.
Nighttime temperatures in the upper 60s over the weekend and Monday morning may also set records for the warmest overnight lows.
When
Starting with the holiday on the Fourth of July, temps 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 at 11 p.m. on Sunday.
The hottest temperatures are expected Friday through Sunday. High temperatures will surpass 100 degrees on Friday, Saturday and Sunday. All three days will likely set new records, as the current records are 98 degrees on Friday, 97 on Saturday and 95 on Sunday.
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.
Download the KGW News app: Download for iPhone here | Download for Android here
Stream newscasts for free on KGW+ on Roku and Amazon Fire: How to add app to your device here
See a typo in this article? Email web@kgw.com for corrections
