As a long-awaited warm spell settles over Wyoming, the next couple of days of warmer temperatures is cause for concern. Along with the month of unseasonably cool temperatures, April also saw a lot of precipitation. The possibility of 70-degree days isn't good news regarding the snow-pack, and with the North Platte River Basin as full as it is, it doesn't take long, says Meteorologist Don Day.

Cooler temperatures slow runoff:

"Even with just the warm temperatures and the release of water going down the North Platte system, they've issued flood warnings along the Platte River just across the border into Nebraska, around Scottsbluff, Mitchell, Henry, Nebraska, areas, they're expecting over the next few days for the water to maybe go above flood stage. So already, after one warm day, at least for our neighbors downstream, they've already got high water."