Blizzard conditions continue for much of western South Dakota. That’s been the big story thus far today but NOW a Tornado Watch has been issued for our very southern-most counties in Nebraska.
You’ll find a running tab of snowfall totals in Storm Center Updates throughout the afternoon and into tonight. Snow squalls (with plenty of lightning) are battering the Badlands and foothills with wind gusts topping 64 mph! Snow will continue to fall into this evening for much of western and north-central South Dakota. As we cool down this evening, the change-over will shift east towards the Missouri River. Eventually the storm will stop back-building NW and will push east. That should bring better snowfall totals to folks along the River, although totals will be MUCH less than those in the Hills.
It’s going to take awhile for this snowfall to clear KELOLAND. The low pressure system is slowing up a little bit. Through much of Saturday, leftover snow will stay between the Hills and Pierre. It shouldn’t be quite as heavy as today BUT there will be spots with heavier fresh accumulations. As we write this, the Blizzard Warning was extended east to include Pierre.
By Sunday, we’re expecting a big warming trend out west. Highs will be close to 60° in Rapid City and that should melt off some of the snow. There should also be plenty of sunshine. Tuesday and Thursday should be the warmest days of the coming week with a slim shot of rainfall coming Wednesday.
Clouds have taken a long time to clear near Sioux Falls. Now there is a fresh but fine and subtle boundary forming along the Missouri River. That’s at the north edge of the Tornado Watch and will certainly bear watching as we warm up late this afternoon. Iowa is loaded with energy and has the best overall chance of severe weather tonight. Nebraska also has a good chance and both spots are warmer than South Dakota. Stratus will help limit storms FORMING in South Dakota but if storms form to the south, they shouldn’t have too much trouble MOVING into the region. The actual center of the hybrid storm is near Grand Island, Nebraska. The center will track up towards Brookings and the storm is actually more intense than Karen in the Gulf of Mexico!
Sioux Falls and the southeast will just see rain, albeit very cold rain. This will continue to come in waves throughout the night. To the north of Brookings, there will be a change-over to a slushy mix tonight. The best chance overall for moisture will be in the northeast corner. That’s because the moisture is wrapping all the way around the system, leaving Sioux Falls with a lower overall chance than Aberdeen. That’s what we call the “dry-slot.” We’re taking the chance of rainfall down tomorrow for Sioux Falls and the southeast because of that. Again, expect a much higher chance of rain in Aberdeen tomorrow. Another big story will be how cool Saturday’s highs will be. We’ll stay in the 30s most of the day, briefly peaking to 41° in Aberdeen. Sunshine returns for a select few late tomorrow East River but Sunday should be warmer and pleasant. We get closer to average by Monday and continue to warm throughout the week to come!