TWIN FALLS, Idaho (KMVT/KSVT) Snow, sleet, freezing rain and rain all make a return to southern Idaho this weekend. Timing and temperatures will play a crucial role on the kind of weather we see but either way it is going to be a messy weekend for all of southern Idaho.
Numerous winter weather advisories and winter storm warnings are in place for southern Idaho this weekend. You can find all of them on KMVT.com.
Saturday 11 a.m. until Noon on Sunday – Snow across all of southern Idaho with locations in the Wood River Valley seeing 6 to 12 inches of snow and valley locations getting 3 to 6 inches of snow. Locations in southern Twin Falls like Hollister, Rogerson and Jackpot could only see about 1 to 3 inches of snow.
Sunday noon to 6 p.m. Sunday – Transition from snow to a wintry mix of sleet and freezing rain to all rain occurs during this time. The forecast becomes very difficult over these 6 hours. It all comes down to timing. As we have seen with the last two storms similar to this back in December, warmer air has a very difficult time pushing the heavier cold air out of the valleys. If this happens again, we could see a prolonged period of snow or even a wintry mix of sleet and freezing rain before it turns to rain. Worst case scenario is it stays cold for snow into Sunday afternoon evening and we add more snow on to the 3-6 inches we are anticipating in the valleys.
Sunday 6 p.m. into Monday – Most of the precipitation will fall as rain below 6000 feet. Mountains will see an additional 4 to 8 inches of snow. Liquid amounts could range from one third of an inch to a half an inch of rain by Monday afternoon and evening.
During this time the concern becomes flooding. There are flood advisories in place for the Eastern Magic Valley for Monday because of the possible melting. Widespread stream flooding is not expected, any flooding will be localized due to poor drainage in cities and towns. With temperatures expected to stay in the 30s during this time, the melting is expected to be slow. This minimizes the threat of flooding but still can cause problems on area roadways.