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...Warm Temperatures will Increase Snowmelt Runoff...

This outlook includes the Upper Yellowstone, Shoshone, Bighorn, Powder, Wind, Sweetwater, Snake, Upper Bear and Green River Basins in central and western Wyoming.

Snow continues to slowly melt across the western two-thirds of Wyoming. In addition, warm temperatures are expected for this upcoming Memorial Day weekend. Cooler than normal temperatures thus far in May have allowed the mountains to hold on to the snowpack longer this year than the last couple of years. However, the timing of the peak snowmelt runoff is likely to be closer to normal this year.

Precipitation so far this spring has varied from below normal in the southwest portion of the state to near normal elsewhere. The recent precipitation in the lower elevations has helped to recharge the ground which will help when the peak runoff finally arrives.

Warmer temperatures this weekend and early next week will increase the amount of snow melting in the mountains. In addition to the warm temperatures, little to no precipitation is expected through the middle of  next week.

With slightly below normal moisture this snow accumulation season, streamflows are expected to range from 50 to 70 percent of normal. In addition, the potential for wildfires through July will be above normal in the southwestern portion of the state and near normal elsewhere.

If you are planning any outdoor activities including camping and hiking over Memorial Day weekend, especially at the higher elevations, you should be aware of the potential for rising water levels in area streams and rivers. Do not set up campsites near rivers and streams.

If you would like more information on water, weather or climate, please contact the Riverton National Weather Service.

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