A major storm system continues to develop across the region, with many types of weather conditions likely across KELOLAND the next few days. First, headlining the weather in western South Dakota is a new winter storm warning for the Black Hills. This starts tonight and will continue through Saturday morning, with a potential for 1 to 2 feet of snow in Deadwood, Hill City, and Custer.
Rapid City and much of the plains of western South Dakota remain in a winter storm watch, meaning conditions are still possible for heavy wet snow tomorrow into Saturday.
Meanwhile, other weather headlines are beginning to emerge in southeastern KELOLAND, where a growing chance of severe weather exist tomorrow…mainly in northwestern Iowa.
Leading into this busy Friday weather, today's forecast will feature scattered showers and thunderstorms with high temperatures ranging from the lower 50s in Rapid City near 70 in Sioux Falls. Rain chances will continue tonight, with rain mixing with snow in the far west.
Tomorrow's high temperatures will vary greatly, with 30s likely in Rapid City with strong north winds at 30 to 60 miles per hour. Temperatures in Sioux Falls will be near 65, with 70s into northwestern Iowa. We think the surface low track will be very near Sioux Falls by mid to late afternoon, perhaps just south of the city.
Along and east of this track will be the best chance of severe weather…large hail, damaging winds, and even isolated tornadoes will be possible. Stay tuned to the latest forecast concerning the severe weather threat in southeastern KELOLAND tomorrow.
This entire storm system will continue to migrate northeast Friday night into Saturday. Very strong gusty northwest winds are expected behind the low, with cold rain in Aberdeen and Pierre likely Friday night into Saturday.
As colder air continues to filter in behind the low on Saturday, some snow may mix with the rain along the Missouri River Valley, perhaps including parts of the James Valley Saturday afternoon.
It will be chilly everywhere Saturday, with highs ranging from the upper 30s in the west to near 50 in NW IA. Temperatures will rebound on Sunday afternoon as skies become partly cloudy from west to east. We still have a chance of frost conditions Sunday AM, but it may be colder in eastern KELOLAND Sunday night and Monday morning. Warmer weather is still on track for early next week with highs in the 60s.