The National Weather Service has issued Red Flag Warnings for elevated wildfire danger beginning at about 11 a.m. Tuesday, July 16 for areas of Colorado, Utah, Nevada, and Arizona. As you can see on the map they expire at various times between Tuesday night and Wednesday night.
The forecasts for those areas include strong winds and low humidity.
(Red Flag Warnings can be modified throughout the day as NWS offices around the country update and revise their weather forecasts.)
