More Severe Storms Possible

Saturday night saw a severe threat move over the state, but without much commotion. Only one warning was issued out of the tornado watch that was issued for portions of western & central Iowa. That warning was for parts of Buena Vista and Cherokee counties from 7:15 PM until 8 PM; it was a tornado warning as a rotating wall cloud was reported near the Linn Grove area.

After a lull in the action today, another system that is expected to slowly make its' way across the northern plains may give us more chances at thunderstorms and severe weather. Tomorrow evening/overnight will be our first chance with this system, low pressure centered in SD with a weak trailing front to its' south should be able to spark off some storms over central SD/NE during the evening hours. With the low level jet increasing towards evening, expect those isolated thunderstorms to possibly congeal into an MCS, (convective system), and move eastward. This line of thunderstorms may likely present the threat of damaging winds as it moves into southern Minnesota and northern Iowa during the early nighttime hours.

On Tuesday, the system doesn't make it much further to the east; putting Iowa in a risk of severe weather once again. Weak front(s) likely to be stretched across the plains states, with an intersection possible in Nebraska. This will likely lead to thunderstorm development in central/eastern Nebraska once again during the evening hours, moving into Iowa in late evening or early nighttime hours. Although a few isolated storms may be possible, especially in western/northern Iowa; the most likely scenario would be another line of thunderstorms (MCS) to move over the state with a threat of severe winds and heavy rains. The forecast is complicated by the events of previous days and thus some changes in location of the fronts and how well the atmosphere is setup for severe weather is likely. But, just keep the eyes out for a continued severe weather threat through mid-week.

Despite the severe weather threats, a warm summer day is in store for the beginning of the work week. Monday highs should be in the upper 80s and lower 90s; lows in the upper 60s to lower 70s. Tuesday highs in the mid 80s to mid 90s from northwest to southeast; some cloud cover and frontal position may change that forecast. Tuesday night lows in the mid 60s to mid 70s... Expect both days to be fairly humid with dewpoints nearing the 70 degree mark.
Next update possible Monday evening, updating the severe threat for the night and Tuesday.