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June 09, 2010 08:10 AM

Storm Center Update-Wednesday AM

It’s a nice quiet start to the morning and today will be mild day with highs in the upper 70s to lower 80s. Winds will be from the northwest as a few clouds increase across the northeast and also in the far southwest. Scattered showers and t-storms will develop in the southwest late this afternoon ahead of a developing warm front. Those scattered t-storms will increase after midnight in eastern KELOLAND. Most of this activity should be non-severe, but a few heavy downpours are possible.

More importantly, we’ll be watching the weather tomorrow. Showers and t-storms will be ongoing during the morning, with much of the activity lifting north of I-90 through midday as a warm front in Nebraska lifts north. Moist, unstable air will be in place south of the front, and this will provide fuel for additional storms in South Dakota in the late afternoon and evening. The exact placement of the front by the early evening is still in question, although it’s most likely to settle near the Missouri River from Pierre to Yankton. Severe weather is likely near this front, with supercell t-storms capable of producing large hail, wind damage, and tornadoes. These storms will eventually form a line of severe weather that will track into portions of eastern KELOLAND during the later evening hours. Again, the placement of the warm front will be better known later today, which will determine just how widespread this severe weather outbreak will be in KELOLAND.

Showers and storms are possible again Friday as the cold front pushes across South Dakota. Sioux Falls will likely be much warmer in the 80s with higher humidity compared to Aberdeen, Pierre, and Rapid City. As the front continues to move south on Saturday, areas in the north and west will turn much cooler with lingering showers possible for the first half of the weekend. Highs in Rapid City will stay in the 60s much of the weekend.