Tuesday is starting to look like a day that you will want to make sure your batteries are charged up in your weather radio. The storm prediction center has issued a moderate risk for the southern half of Iowa, south of I80, and a slight risk south of highway 20 to north of interstate 80. The potential exists for significant severe weather events on Tuesday with a threat for very large hail, tornadoes, and widespread damaging wind.
Storms will form out in Nebraska and as they push towards Iowa, they will begin to line out. This will lead to a bow echo and embedded supercells. Usually we talk about that storms begin to lose their strength after dark because the heating of the day, well there is so much available moisture plus very strong wind shear and instability that storms will hold their strength overnight. This means that tornadoes will be possible overnight and that is why you will want to make sure to have you weather radio ready to go. The widespread damaging winds is another big threat. It could be possible that wind gusts will be approaching 80mph. That would lead to some very serious straight line wind damage. Flash flooding will also be another big concern. Rainfall totals from this storm system are very impressive with totals approaching 3 inches in some places.
We will be keeping a very close eye on this system and will have another update this afternoon around 5pm. Look for all the very latest information right here on Iowachase.com and on our Facebook and Twitter pages.