Portland, OR Warnings, Watches and Advisories

When a severe thunderstorm warning is issued, the storm may produce damaging winds, large hail, dangerous lightning, and heavy rain. In some cases, heavy rainfall produced by a severe storm can also lead to flash flooding. Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.

Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Portland.

Use the Radar Maps link provided to understand the trajectory of a storm.

Red Flag Warning issued July 21 at 2:59PM PDT until July 22 at 11:00PM PDT by NWS Pendleton OR

...The upper level low over the region will shift to the east just enough to allow for monsoonal moisture to move into the region. Instability will accompany the moisture and allow for increased chances of thunderstorms across central Oregon and the eastern mountains. Isolated dry thunderstorms could spark new wildfires and gusty outflow winds can affect fires already on the landscape... * AFFECTED AREA...Fire Weather Zones 698 Southern Blue Mountains, 700 Central Mountains of Oregon and 705 Southern Deschutes National Forest. * TIMING...From 11 AM to 11 PM PDT Wednesday. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. * THUNDERSTORMS...Isolated to scattered dry thunderstorms after 11 AM Wednesday. * OUTFLOW WINDS...Gusts from 25-35 mph

Air Quality Alert issued July 21 at 1:30PM PDT by NWS Portland OR

Oregon Department of Environmental Quality has issued an Air Quality Advisory, which is IN EFFECT UNTIL 6 PM PDT WEDNESDAY. An Air Quality Advisory for Smoke has been issued for Clackamas County. An Air Quality Advisory for Ozone has been issued for the Portland-Metro Area and around Salem. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels due to smoke and ozone at times through 6 PM Wednesday. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. More information about air quality can be found at: www.oregon.gov/DEQ

Air Quality Alert issued July 21 at 2:08PM MDT by NWS Boise ID

* WHAT...High concentration of smoke particulates from wildfires. * WHERE...Baker, Harney, and Malheur Counties. * WHEN...UNTIL NOON PDT WEDNESDAY. * IMPACTS...Smoke can irritate the eyes, lungs and worsen some medical conditions. People most at risk to adverse health effects include infants, young children, people with heart or lung disease, older adults, and pregnant women. * ADDITIONAL DETAILS...Smoke levels can change rapidly depending on weather. Check current conditions on the Oregon Smoke Information Blog, DEQ's Air Quality Index, or by downloading the free OregonAIR app on your smartphone.

Red Flag Warning issued July 21 at 12:12PM PDT until July 22 at 11:00PM PDT by NWS Medford OR

The National Weather Service in Medford has issued a Red Flag Warning, which is in effect from 11 AM to 11 PM PDT Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Areas in southern Oregon along and east of the Cascades and along the western foothills and slopes of the Cascades, including Fire Weather Zones 617...622...623...624 and 625. * THUNDERSTORMS...Moving roughly north to northeast around 20 mph. Storm mode will be mostly wet thunderstorms, but dry lightning strikes can occur outside of wet cores. * OUTFLOW WINDS...Isolated gusts up to 45 mph. * DETAILED URL...View the hazard area in detail at https://weather.gov/wrh/hazards?wfo=mfr

Heat Advisory issued July 21 at 10:47AM PDT until July 21 at 11:00PM PDT by NWS Portland OR

* WHAT...High temperature today of 95 to 98 degrees F. * WHERE...Cascade Foothills of Marion and Linn Counties and Linn County Lowlands. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Smoke from area fires and incoming cloud cover may reduce temperatures in some locations. However, there remains a high probability of temperatures meeting Major HeatRisk today. This is especially true within the valleys.

Heat Advisory issued July 21 at 10:47AM PDT until July 22 at 11:00PM PDT by NWS Portland OR

* WHAT...High temperatures up to 100. * WHERE...Greater Portland/Vancouver Metro, Western and Central Columbia River Gorge and the Hood River Valley, Lower Columbia River and Cowlitz River Valleys, and Central Willamette Valley. * WHEN...Until 11 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Smoke from fires outside of the region or clouds moving into the area could result in cooler daytime high temperatures than currently forecast. Around a 10-15% chance of thunderstorms on Wednesday afternoon which may increase cloud cover and thus cause temperatures to be slightly lower than forecast.

Heat Advisory issued July 21 at 6:14AM PDT until July 23 at 9:00PM PDT by NWS Pendleton OR

* WHAT...Hot conditions with temperatures up to 100 to 103 degrees expected, with 101 to 105 degrees in the Columbia Basin. This will pose a moderate to major risk of heat-related illness. * WHERE...Eastern Columbia River Gorge of Oregon and Washington, Lower Columbia Basin of Oregon and Washington, Foothills of the Northern Blue Mountains of Oregon, Yakima Valley, and Foothills of the Blue Mountains of Washington. * WHEN...From 11 AM this morning to 9 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...The heat will begin today, with widespread moderate and locally major HeatRisk. Wednesday looks to be the hottest day, with Major HeatRisk across the Columbia Basin, Yakima Valley and portions of the Gorge and Blue Mountain Foothills. Thursday will also see widespread moderate HeatRisk and locally major HeatRisk, mainly across the Columbia Basin. Smoke from area wildfires could end up affecting how hot temperatures get.

Air Quality Alert issued July 20 at 7:40PM PDT by NWS Pendleton OR

Oregon Department of Environmental Quality has issued an Air Quality Advisory until 4 PM PDT Wednesday. For the Smoke Air Quality Advisory, wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. For additional information...please visit the Web site at http://www.oregon.gov/DEQ

Air Quality Alert issued July 20 at 6:03PM PDT by NWS Pendleton OR

Oregon Department of Environmental Quality has issued an Air Quality Advisory until 4 PM PDT Wednesday. For the Smoke Air Quality Advisory, wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. For additional information...please visit the Web site at http://www.oregon.gov/DEQ

Air Quality Alert issued July 20 at 3:16PM PDT by NWS Medford OR

Oregon Department of Environmental Quality has issued an Air Pollution Advisory for northern Jackson County...in effect until 2 PM PDT Wednesday. Wildfires burning in the region combined with forecast conditions will cause air quality levels to fluctuate and could be at unhealthy levels. Smoke levels can change rapidly depending on the weather. People at risk include infants and young children, people with heart or lung disease, older adults and pregnant people. People can take the following precautions to protect their health: * Follow local burn restrictions to prevent deteriorating air quality. * Avoid strenuous outdoor activity during periods of poor air quality. * People with heart or lung problems and young children are especially vulnerable. These people should stay indoors while smoke levels are high. * Use certified High Efficiency Particulate Air (HEPA) filters in indoor heating, ventilation, cooling and air purification systems. For additional information...please visit the web site at https://oregonsmoke.org

Air Quality Alert issued July 20 at 1:46PM PDT by NWS Pendleton OR

Oregon Department of Environmental Quality has issued an Air Quality Advisory until 4 PM PDT Wednesday. For the Smoke Air Quality Advisory, wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. For additional information...please visit the Web site at http://www.oregon.gov/DEQ