Overview

• The alert now covers central, eastern and southern Utah through Saturday evening and has been expanded to include the Uinta Basin, with the south slopes of the Uinta Mountains highlighted for risk.
• Flash flooding is expected near Zion and Lake Powell, with a probable threat for Arches, Bryce Canyon, Canyonlands and Capitol Reef, plus Natural Bridges, Grand Gulch and the San Rafael Swell.
• Rainfall has already been significant, including 2.6 inches at Boulder Summit by midday Friday, over an inch in other locations, and more than a quarter inch reported in parts of Salt Lake County.
• Officials urge the public to avoid slot canyons, dry washes and slickrock, warning that some backcountry roads could become impassable and advising drivers to turn around rather than enter floodwaters.
• The front is expected late Saturday afternoon and evening with heavy rain, lightning and wind, a timing that could disrupt large outdoor events in Salt Lake County.