Runoff from this week's snowfall is swelling several northern Utah waterways.

The National Weather Service posted a flood watch Friday for the Weber River from Echo Reservoir to the town of Mountain Green.The watch is expected to continue through early next week or until area reservoir releases are reduced.

"The Echo, East Canyon, Wanship and Rockport (reservoirs) are all releasing as much as they can," meteorologist William Alder said.

The Weber River flood watch also extends into the cities of Henefer and Morgan, according to Alder. Watchers say the Weber was flowing near or above the top of its banks and will likely continue at or above that level for several more days.

Several northern Utah reservoirs were already close to being filled at the beginning of the week because of normal spring runoff, Alder said.

Two days of wacky, winterlike weather didn't help.

"Rockport rose 4 feet in two days," Alder said.

Reservoir managers are reportedly releasing as much water as possible.

At this point, the only areas that could be threatened are low-lying fields that border the Weber River.

There are no reports of trouble in other Utah reservoirs or rivers.

For the most part, weather should cooperate with flood watchers this weekend, Alder said.

Showers are possible Friday and Saturday in northern Utah, with temperatures stretching into the 70s.

Father's Day should be mostly sunny with a slight change of afternoon and evening thunderstorms.

Utah's Dixie will likely be dry and hot. The mercury could climb into the 90s Friday, Saturday and Sunday, with a slight chance of afternoon thunderstorms on Saturday.