Flash flooding is the sharpest weather threat at Petrified Forest National Park, with five recorded flash flood events in Apache County driving the hazard profile here. The park's high desert terrain—wide washes, hardpan soil, and sparse vegetation—funnels even modest rainfall into fast-moving walls of water with little warning, and the data also flags hail, thunderstorm winds, and a funnel cloud sighting as secondary concerns during storm season.
When afternoon storm clouds build between July and September, pull off the road and move away from any wash, arroyo, or low-lying area immediately—do not wait for rain to reach you. Pack a NOAA weather radio or download the NWS app before you leave cell range, since most of the park has no signal. Carry a waterproof bag with your car keys and documents so a sudden evacuation from a flooded campsite doesn't strand you without essentials.
Top recorded hazards in Apache County
County dataFrom NOAA Storm Events (2024). Counts of recorded incidents — not all occurred at this park.
- Flash Flood 5
- Heavy Rain 1
- Hail 1
- Thunderstorm Wind 1
- Funnel Cloud 1
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About Petrified Forest National Park
A landscape where deep time lies fully on display, Petrified Forest National Park blends colorful badlands, vast grasslands, and one of the world’s largest and most vivid collections of petrified wood. Spanning more than 200 million years of geologic history, the park protects ancient fossils, ancestral Puebloan sites, habitat for desert animals, and a sweeping stretch of historic Route 66.
Weather
Petrified Forest National Park is a semi-arid grassland. Temperatures range from above 100° F (38° C) to well below freezing. About 10 inches (25.4 cm) of moisture comes during infrequent snow in the winter and often dramatic summer thunder-storms. Animals and plants are adapted to extremes in temperature and moisture. You should be ready too. Check out the forecast before you arrive and plan accordingly.