Detailed forecasts for Coyote Buttes can be found at the National Oceanic and Atmospheric Administration (NOAA) website.
Always check this site for predicted weather conditions and flash flood warnings/advisories before traveling to the Coyote Buttes trailheads and access points. More detailed information can be obtained just prior to your trip at the Paria Contact Station.
Flash floods can occur during heavy rainstorms any time of the year, but especially during July, August and early September. These unpredictable events can drastically change hiking conditions.
Weather can be deceptive. Heavy rains 35 miles upstream can bring high water flows. As a general rule of thumb, water three-feet deep traveling three feet per second can knock a hiker down into murky waters.
Be cautious about driving to the trailheads/access points and hiking if thunderstorms are predicted in the Coyote Buttes area. When hiking to the "Wave" in Coyote Buttes North, the most dangerous area is the beginning of the hike, which starts in the Wire Pass drainage. If a storm develops and a flash flood situation is created, get to the highest and safest point possible. Flash floods usually subside in 8 to 12 hours. Many times a flood can leave you stranded for several days due to treacherous footing, even with lower flows.
Exercise extreme caution when hiking in Coyote Buttes during thunderstorms. The area is very exposed and low areas that are safe from lightning strikes are difficult to find.