SIOUX FALLS, SD -
A powerful early October system continues to develop Thursday afternoon, with chances for heavy snow increasing Thursday night and tomorrow in much of the Black Hills, spreading east into the plains of western SD Friday night. The map below shows some potential snowfall totals by late Friday evening. Amounts near two feet are possible in the northern Black Hills.
Rapid City and much of the plains of western South Dakota remain in a winter storm watch, meaning several inches of heavy wet snow will be possible.
Meanwhile, other weather headlines are beginning to emerge in southeastern KELOLAND, where a growing chance of severe weather exist on Friday mainly in northwestern Iowa.
Leading into this busy Friday weather, Thursday's forecast will feature scattered showers and thunderstorms with high temperatures ranging from the lower 50s in Rapid City and near 70 in Sioux Falls. Rain chances will continue Thursday night, with rain mixing with snow in the far west.
Friday'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. New data as of noon has started to shift this low even farther NW, which would bring severe weather threats farther NW if this trend continues.
Along and east of the low pressure 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 on Friday.
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.
© 2013 KELOLAND TV. All Rights Reserved.