Mesa Countyarea
Jul 11, 2026, 11:56 AMeffective
Jul 12, 2026, 12:00 AMexpires
NWS Grand Junctionsource
Approximate affected area. Zone-based advisories do not include an exact boundary
Full advisory
WHAT
Dangerously hot conditions with afternoon temperatures as high as 100 to 106 expected.
WHERE
In Colorado, Central Yampa River Basin, Lower Yampa River Basin, Debeque to Silt Corridor, and Grand Valley. In Utah, Arches/Grand Flat and Eastern Uinta Basin.
WHEN
Until midnight MDT Monday Night.
IMPACTS
Heat related illnesses increase significantly during extreme heat events.
ADDITIONAL DETAILS
Near record temperatures are possible especially Sunday into Monday during the peak of this event.