Sunday's heat comes with a red-flag warning for Fort Collins, mountains and foothills

Cloudy skies helped Fort Collins stay below record temperatures on Saturday, but another hot day is ahead, along with a red-flag warning.

The Fort Collins Weather Station at Colorado State University recorded a high temperature of 96 degrees Saturday. The record high for July 13 is 100.

The National Weather Service forecast calls for a high around 99 in Fort Collins on Sunday. The record high temperature for July 14 is 97 degrees, according to data from the Colorado Climate Center.

The highest temperature ever recorded in Fort Collins is 103, on July 21, 2005.

Don't have air conditioning?How to keep cool during Fort Collins heat advisory

The Fort Collins forecast for Sunday and early in the workweek

With Sunday's heat comes a red-flag warning for critical fire conditions in Larimer County and areas west of the Interstate 25 corridor.

In effect from noon to 9 p.m. Sunday, the warning says there could be thunderstorms with dry lightning for the mountains, foothills and eastern Larimer County. This could be accompanied by gusty winds, up to 45 mph.

This will create conditions favorable for lightning-caused fires, the warning states.

In Fort Collins, on Sunday there's a 20% chance of showers and thunderstorms after noon. Winds could gust as high as 16 mph, according to the forecast.

Here's what to expect after that, according to the National Weather Service.

Monday: Mostly sunny, with a high near 96. A 40% chance of showers and thunderstorms, mainly after 1 p.m. North wind 6 to 13 mph, with gusts as high as 20 mph.

Tuesday: Partly sunny, with a high near 89. Showers and thunderstorms likely after noon. Chance of precipitation is 60%.

Wednesday: Partly sunny, with a high near 84. A slight chance of showers, then showers and thunderstorms likely after noon. Chance of precipitation is 60%.

Day shelter open in Fort Collins

An indoor day shelter will be available at the Murphy Center for Hope, 242 Conifer St., for people experiencing homelessness. Sunday's hours are 8 a.m. to 5 p.m.

Coloradoan reporter Sady Swanson contributed to this report.