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Forecast Products Archive (12/15/2025)

Air Quality Advisory

Denver Metro/Front Range:
Issued: 12/15/2025 2:03:00 PM
Residential Burning Unrestricted - No Action Day
Effective: 12/15/2025 4:00:00 PM - 12/16/2025 4:00:00 PM
Adequate mixing of the atmosphere will result in Good to Moderate air quality and visibility through Tuesday afternoon.

Other Areas:

No advisories issued

Front Range Air Quality Forecast & Colorado Smoke Outlook

Issued: 12/15/2025 1:45:00 PM
FRONT RANGE AIR QUALITY FORECAST:
Monday, December 15, 2025, 1:45 PM MST

Ozone concentrations are expected to be in the Good category on Monday and Tuesday.

Fine Particulate Matter concentrations are expected to be in the Good to Moderate range on Monday and the Good category on Tuesday. On Monday, Moderate concentrations of fine particulate matter will mainly be confined to locations in central and southern Weld County, including Greeley. In these areas, people who are unusually sensitive to particle pollution should consider reducing prolonged or heavy exertion through Monday evening.

Carbon Monoxide concentrations are expected to be in the Good category on Monday and Tuesday.

Nitrogen Dioxide concentrations are expected to be in the Good category on Monday and Tuesday.

Visibility on Tuesday is expected to be Good.

Issued: 12/15/2025 7:06:00 AM
FRONT RANGE AIR QUALITY FORECAST:
Monday, December 15, 2025, 7:05 AM MST

Ozone concentrations are expected to be in the Good category on Monday.

Fine Particulate Matter concentrations are expected to be in the Good to Moderate range on Monday. Moderate concentrations of fine particulate matter will mainly be confined to locations in central and southern Weld County, including Greeley. In these areas, people who are unusually sensitive to particle pollution should consider reducing prolonged or heavy exertion on Monday.

Carbon Monoxide concentrations are expected to be in the Good category on Monday.

Nitrogen Dioxide concentrations are expected to be in the Good category on Monday.

Visibility on Monday is expected to be Good to Moderate.


Open Burning Forecast

The open burning season for the greater metropolitan area is effective between March 1, and October 31.