National Weather Service United States Department of Commerce

Severe Thunderstorm Areas This Saturday; Excessive Heat in the Southern U.S.

Damaging thunderstorm winds and a few tornadoes with areas of excessive rainfall are possible today over parts of the lower Great Lakes to upper Ohio Valley and Mid-Atlantic, the Ozarks, and south-central High Plains. Excessive heat will continue over the southern U.S. this weekend before another round of heat arrives Monday through the central and southern U.S. spreading into the East by midweek. Read More >

On Monday July 15 NWS offices in Colorado will begin officially issuing Air Quality Alerts in partnership with Colorado Department of Public Health & Environment (CDPHE).  CDPHE's Air Pollution Control Division, in tandem with Colorado's Air Quality Control Commission (AQCC), are responsible for the protection of public health and the improvement of air quality in the state.  When CDPHE issues an Ozone Action Day or other alert, the NWS will relay that information to the public via our Air Quality Alert. Check our website at www.weather.gov/bou and look on the map for the affected regions.
 
Image of NWS website depicting Air Quality Alert areas in gray.
Example of Air Quality Alert (in gray)