A flood watch is in effect for northern Utah on Sunday and Monday as heavy rain is expected to increase the threat of flash flooding, according to the National Weather Service.

The forecast calls for scattered thunderstorms Sunday afternoon in northern Utah, with more widespread heavy rain expected Sunday evening and overnight. Areas with poor drainage and areas near burn scars are the most likely to see flash flooding, the weather service said.

A flood watch is in effect from noon on Sunday until 6 p.m. on Monday.

Hikers and others with outdoor plans should watch the weather and consider alternate plans, the weather service advised. Don’t drive through floodwaters.

Strong to severe storms are predicted for western Utah on Sunday in the afternoon and evening, with the main threats being large hail, damaging winds and heavy rain, the weather service said.

Residents are advised to secure outdoor items such as trampolines and furniture, and seek shelter if you hear thunder.

Scattered thunderstorms could develop in southwestern Utah on Sunday afternoon. Since soils are already saturated, any heavy rain could bring flash flooding to slot canyons, normally dry washes and areas near recent burn scars, the weather service said.

After a rainy Labor Day weekend, the forecast for Salt Lake City looks sunny and clear through Thursday, with highs in the 70s.

In St. George, Labor Day is forecast to be sunny, with clear conditions persisting through Thursday. Highs are expected to be in the low 90s.