This is one of those forecasts that is not good news to those who are light sleepers. Several rounds of showers and thunderstorms are expected to fire across the Upper Midwest beginning this afternoon. There are two separate rounds of severe weather which could develop today and that’s where we’ll start our focus.
The Storm Prediction Center has issued a slight risk for Most of Iowa. This, in response to a northward moving warm front that will push through the state, bringing plenty of heat and humidity in its wake. Temperatures in areas could shoot up into the lower 90’s today. As this warm front pushes through, an isolated storm or two could fire along the boundary.
With the amount of energy available and the dynamics in place, all modes of severe weather will be possible within any severe storms that develop across Iowa this afternoon. However, the greatest threat will come in the form of large hail and strong damaging winds. A tornado or two cannot be ruled out.
Eventually, these storms may pass to the north with the boundary, but another potent line of thunderstorms will fire well to our northwest in the Dakotas. These storms could dive south during the overnight hours, affecting southern portions of Minnesota and northern portions of Iowa. These storms have the potential to remain severe throughout the evening and overnight hours.
By the time they reach Iowa the primary threats will be strong damaging winds and large hail. But this is only the beginning of what is shaping up to be a very active start to Summer.
Each day through Monday, there is the potential for severe weather to break out across Iowa and the rest of the Upper Midwest. At this time most of these threats appear conditional, highly dependent not only on the conditions each day and the location of the storm system, but also the timing and the impact previous storms may have on the setup.
All of this is something we will closely monitor and we will do our best to keep you informed, regardless of the hour.