Looking at the week ahead, Tuesday through Thursday will be the most active period. This is when rain, strong winds, and bitter wind chills will be the topic of discussion. By mid week, an upper level low will develop across the upper Midwest. This low by Thursday morning will strengthen to 980mb.
If you notice the surface map above, the black lines are isobars. These lines are lines of equal pressure, so the closer these lines are together, the stronger the wind will be. By sunrise Thursday, we will have a 10mb pressure change across the state. This will translate to sustained winds at 20 to 25mph, with gusts up to 40 to 45mph.
Another thing that we will have to deal with is some rain. Rain will move through the state Tuesday into Wednesday. Rain will begin during the afternoon hours on Tuesday, and will exit the state by mid morning Wednesday. Rainfall totals will range from 0.25″ to 1.5″, with the highest totals across eastern Iowa. This is great news for those of you that have high school state playoff football games Wednesday night.
Temperatures will begin to warm back up by the end of the week, setting up for a nice weekend. There is a slight chance of rain Friday night into Saturday, but this doesn’t appear to have any impact on those who may be trick-or-treating Friday night.