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Several northern Utah counties are under flood warnings and watches Monday morning through midweek, though no damage has been reported.

an increase in temperatures midweek, with temperatures peaking above 80 degrees, said Steve Rogowski, meteorologist for the National Weather Service.

"We're expecting a temperature warm-up Wednesday, maybe into Thursday, that's going to encourage additional high-elevation snow to melt off, which should result in increased flows across many of the rivers in northern Utah," Rogowski said.

The Weber River below Echo Reservoir was near or slightly above flood levels all the way to the Great Salt Lake. Flooding likely will affect low-lying fields and roads along the river's path, including in the cities of Morgan, Uintah, Warren and Plain City. The South Fork of the Ogden River also is under a flood warning, as is the Green River near Jensen and the city of Green River.

Continued cool temperatures have slowed the snowmelt in the Cache Valley area. However, a flood watch is in effect for the Logan River, which may reach flood stage by Tuesday evening, according to the National Weather Service. Areas under the flood watch include the Cache Valley and the Wasatch Mountains north of Interstate 80.

However, temperatures should again drop below the 80s at the end of the week and into the weekend.

"We don't see any prolonged hot temperatures, which will allow snowmelt to slow down," Rogowski said. "We've had some flooding this year, but it would be much worse and much more widespread if we did see that rapid increase of prolonged hot temperatures.

"We're just not seeing that in the forecast, and that's good news."