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ESFGUM This Hydrologic Outlook is for Guam, Rota, Tinian, and Saipan. A monsoon surge is developing well south of Tropical Storm Saudel and will lift northward across the Marianas late this weekend and into next week. Some uncertainty remains regarding potential rainfall impacts, but early model ensemble guidance estimates suggest 4 to 8 inches of rainfall falling Sunday night through Thursday across Guam and Rota, and 3 to 7 inches across Saipan and Tinian. Locally higher amounts

AQAMSO * WHAT...Air Quality Advisory due to smoke from wildfires. Air quality is currently in the Moderate to Unhealthy categories of the Air Quality Index (AQI). To track regional air quality, visit the AirNow Fire and Smoke Map or the Idaho Smoke Blog. Follow AQI health recommendations. * WHERE...All Areas on the Nez Perce Reservation. * WHEN...Until 3:00 PM PDT Friday, August 20, 2026 * IMPACTS...Those who experience health effects from smoke include children under 18, elders, pregnant women, people with asthma

An Air Quality Alert has been issued by the following agencies: Nez Perce Tribe An Air Quality Advisory has been issued for Clearwater, Idaho and Lewis Counties on the Nez Perce Reservation due to smoke from wildfires. Wildfire smoke may move in and out of the depending on fire and wind activity; some areas may be more impacted than others. This remains in effect until Friday, August 20th 2026 at 3 PM. Those who experience greater health effects from smoke include

An Air Quality Alert has been issued by the following agencies: Washington Department of Ecology An Air Quality Alert has been issued for Chelan, Douglas, Ferry, Grant, and Okanogan Counties until further notice due to current and expected smoke from regional fires. Particulate matter (PM2.5) may reach Unhealthy levels for areas downwind from active wildfires. Be sure to check air monitors in your area before outdoor activities. When air quality is Unhealthy, everyone should reduce exposure.

The Colorado Department of Public Health and Environment has issued the following... WHAT...Ozone Action Day Alert. WHERE...Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer, and Weld Counties WHEN...400 PM Thursday August 20 to 400 PM Friday August 21 IMPACTS...Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Hot, sunny, and stagnant weather will allow ozone to reach the Unhealthy for Sensitive Groups concentration on

The Oregon Department of Environmental Quality has issued an Air Quality Advisory, which is IN EFFECT UNTIL NOON PDT FRIDAY. An Air Quality Advisory for Smoke has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times through NOON PDT FRIDAY. 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

AQAFWD The Texas Commission on Environmental Quality (TCEQ) has issued an Ozone Action Day for the Dallas-Fort Worth area for Friday, August 21, 2026. Atmospheric conditions are expected to be favorable for producing high levels of ozone air pollution in the Dallas-Fort Worth area on Friday. You can help prevent ozone pollution by sharing a ride, walking, riding a bicycle, taking your lunch to work, avoiding drive-through lanes, conserving energy, and keeping your vehicle properly tuned.

AQAMEG The Shelby County Health Department has issued a Code Orange Ozone Forecast effective for Shelby County Tennessee, Crittenden County Arkansas, and DeSoto County Mississippi, including the city of Memphis for Friday. This ozone forecast is due to forecasted ozone values that will be unhealthy for sensitive groups. These values will exceed the Environmental Protection Agency's federal safe health standard. The Shelby County Health Department recommends that

The Oklahoma Department of Environmental Quality has issued an Air Quality Alert for Ozone for Friday, for the Tulsa Metropolitan area. An ozone alert means that conditions are favorable for the buildup of ozone near the ground, to an unhealthy level. When winds are light, the vapors from fuels such as gasoline, exhaust from engines, and air pollutants from industrial activities remain trapped near the ground. If sunshine is abundant when these air pollutants build

The following statement was issued by the Oklahoma Department of Environmental Quality from 10 AM to 10 PM CDT Friday. An Air Quality Alert for Ozone has been issued for Friday, August 21 for the Oklahoma City Metropolitan area due to expected high concentrations of ozone. Public Health Recommendations: Persons with existing heart or respiratory ailments should reduce physical exertion and outdoor activity. The general public is encouraged to help alleviate the problem by