weather.gov     
National Weather Service

Watches, Warnings & Advisories
NWS Homepage

Air Quality Alert


COC109-079-003-021-105-141500-
Saguache-Mineral-Alamosa-Conejos-Rio Grande-
410 PM MDT Sun Jul 13 2025

...AIR QUALITY HEALTH ADVISORY FOR WILDFIRE SMOKE FROM 900 AM
SUNDAY UNTIL 900 AM MONDAY...

The Colorado Department of Public Health and Environment has
issued the following...

WHAT...Air Quality Health Advisory for Wildfire Smoke.

WHERE...Saguache, San Juan, Hinsdale, Mineral, Archuleta, Rio
Grande, Alamosa, Conejos, southern Mesa, Delta, Gunnison,
Montrose, Ouray, San Miguel, Dolores, Montezuma and La Plata
Counties. Locations include, but are not limited to Saguache,
Silverton, Lake City, Creede, Pagosa Springs, Del Norte, South
Fork, Alamosa, Conejos, Delta, Gunnison, Montrose, Nucla, Ouray,
Telluride, Dove Creek, Cortez, Durango, Hermosa, Honeyville and
Rockwood.

WHEN...900 AM Sunday July 13 to 900 AM Monday July 14

IMPACTS...Multiple wildfires across the region will produce
moderate to heavy smoke through at least early Monday morning.

HEALTH INFORMATION...Public Health Recommendations: If smoke is
thick or becomes thick in your neighborhood you may want to remain
indoors. This is especially true for those with heart disease,
respiratory illnesses, the very young, and older adults. Consider
limiting outdoor activity when moderate to heavy smoke is present.
Consider relocating temporarily if smoke is present indoors and is
making you ill. If visibility is less than 5 miles in smoke in
your neighborhood, smoke has reached levels that are unhealthy.

$$

COC029-067-091-007-077-033-113-085-053-051-083-111-141500-
Delta-La Plata-Ouray-Archuleta-Mesa-Dolores-San Miguel-
Montrose-Hinsdale-Gunnison-Montezuma-San Juan-
410 PM MDT Sun Jul 13 2025

...AIR QUALITY HEALTH ADVISORY FOR WILDFIRE SMOKE FROM 900 AM
SUNDAY UNTIL 900 AM MONDAY...

The Colorado Department of Public Health and Environment has
issued the following...

WHAT...Air Quality Health Advisory for Wildfire Smoke.

WHERE...Saguache, San Juan, Hinsdale, Mineral, Archuleta, Rio
Grande, Alamosa, Conejos, southern Mesa, Delta, Gunnison,
Montrose, Ouray, San Miguel, Dolores, Montezuma and La Plata
Counties. Locations include, but are not limited to Saguache,
Silverton, Lake City, Creede, Pagosa Springs, Del Norte, South
Fork, Alamosa, Conejos, Delta, Gunnison, Montrose, Nucla, Ouray,
Telluride, Dove Creek, Cortez, Durango, Hermosa, Honeyville and
Rockwood.

WHEN...900 AM Sunday July 13 to 900 AM Monday July 14

IMPACTS...Multiple wildfires across the region will produce
moderate to heavy smoke through at least early Monday morning.

HEALTH INFORMATION...Public Health Recommendations: If smoke is
thick or becomes thick in your neighborhood you may want to remain
indoors. This is especially true for those with heart disease,
respiratory illnesses, the very young, and older adults. Consider
limiting outdoor activity when moderate to heavy smoke is present.
Consider relocating temporarily if smoke is present indoors and is
making you ill. If visibility is less than 5 miles in smoke in
your neighborhood, smoke has reached levels that are unhealthy.

$$

COC013-123-005-001-069-059-035-031-014-142200-
Boulder-Weld-Arapahoe-Adams-Larimer-Jefferson-Douglas-
Denver-Broomfield-
410 PM MDT Sun Jul 13 2025

...OZONE ACTION DAY ALERT FROM 400 PM SUNDAY UNTIL 400 PM
MONDAY...

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 Sunday July 13 to 400 PM Monday July 14

IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor.  Hot and stagnant weather will allow ozone
to reach the Unhealthy for Sensitive Groups category on Sunday and
Monday. The highest concentrations are expected in western
portions of the Denver Metro area, and northward along the I-15
corridor towards Fort Collins.  For Colorado air quality
conditions, forecasts, and advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx   If
possible, please help us reduce ozone pollution by limiting
driving gas and diesel-powered vehicles until at least 4 p.m.
Monday, July 14, 2025. Colorado is also addressing ozone pollution
through state policies. For more information about health impacts
and how ozone pollution forms in Colorado, visit:
https://cdphe.colorado.gov/ozone- pollution-and-your-health

HEALTH INFORMATION...Increasing likelihood of respiratory symptoms
and breathing discomfort in active children and adults and people
with lung disease, such as asthma. Active children and adults, and
people with lung disease, such as asthma, should reduce prolonged
or heavy outdoor exertion.

$$

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE