Denver rolled into Monday under clear blue skies and a warm start, with Jefferson County's KBJC station already near 73°F in the early hours. That number will not stay modest for long, as highs are set to push close to 100°F while a Heat Advisory blankets the metro through 9 PM MDT on Monday, July 20.
Heat Advisory Through Monday Night
The National Weather Service has a Heat Advisory in place until 9 PM MDT Monday for the I-25 corridor and adjacent plains, where daytime highs are expected to range between about 99°F and 103°F. Forecasters caution that the combination of very hot days and warm nights can drive up the risk of heat-related illness. Residents are urged to drink plenty of water, stick to air-conditioned spaces when possible, avoid strenuous outdoor work during the hottest hours, and check in on older adults, people without reliable cooling, and pets.
Storms Move In Midweek
While Monday's heat will dominate the plains, the higher terrain is expected to see scattered afternoon thunderstorms, with only a slight chance that showers or storms drift onto the plains Monday night. A more robust surge of monsoonal moisture is projected to arrive from Tuesday through Thursday, ramping up afternoon and evening storm coverage and increasing the chance for slow-moving cells capable of producing pockets of heavy rain. For more background on this evolving pattern, see our look at the two-day heat blast, as per Hoodline.
How To Stay Cool
Health officials say the basics still matter most: stay hydrated, avoid intense outdoor activity during peak heat, and never leave children or pets in parked vehicles, even for a short time. When a Heat Advisory is active, the city can open cooling centers at recreation centers and libraries. For details on where and when those may be available, call 2-1-1 or check the City of Denver cooling resources.
Commuters and anyone with evening plans should keep an eye on the sky. A slight chance of storms could still mean brief downpours, and storm coverage is expected to increase as the week goes on. Stay updated by monitoring local forecasts and the NWS Denver/Boulder page for any new advisories or warnings.
