Much cooler air has settled into NWI this afternoon and evening behind yesterday’s cold front. Snow is falling in the upper Midwest on the northern edge of this system–and thankfully it will stay there! For us, we have a dry period of weather through tonight with cool, mainly cloudy conditions set to continue.
Our next system develops tomorrow and brings a return flow of moisture out of the south leading to spotty showers. A front will establish itself to our south and waves of rain and storms–some with heavy rain–will set up along this boundary and move through the area Saturday. The front may head north of us on Sunday, which would bring warm and humid conditions to NWI. Some models–including our model–don’t bring the warm front quite as far north as other models. If the warm front can surge north of our area, we have a risk for strong to severe storms Sunday…if not, we may be talking just rain. Still some time to watch the storm system develop. Either way, we have several waves of moderate to heavy rainfall which will likely lead to some flooding as our rather wet spring continues.
Speaking of heavy rainfall–models are indicating anywhere from 2-4 inches of rain could fall SOMEWHERE in the vicinity of northern Illinois to northern Indiana. Our in-house model is attached below–showing 3-5 inches of rain through Monday. Don’t get too attached to the exact numbers, but do get attached to the trend–which is for a very soggy weekend with waves of heavy rainfall. Flood risk will need to be monitored!
We’ll continue to track this heavy rain and potential strong storm event this weekend!