Halloween Scare-cast

Now that we're on the eve of Halloween, we have a much better outlook on how the day will shape up! Unfortunately, there is going to be rain for most of the day Saturday. A low pressure system to the southwest, is currently producing heavy rain and severe storms for portions of Texas.  This system then tracks east across the U.S today and tonight. With this, warm and moist air advects - or is transported - into northern Illinois and southern Wisconsin tonight through Saturday. As a trough and a wave of energy move into the region, rain will form just ahead of it. Rain will move in very late tonight or early Saturday morning. Most of the rain will fall early and midday Saturday with help from the strong upper level south west jet. The jet ( or jet stream) is a column of fast moving air, and we call them our steering winds. So this jet will funnel the moisture overhead and brings enough lift in the atmosphere for some rain. Overall, it looks like we will see about 0.25" of rain. Rain will then begin to move out in the late afternoon, and early evening from west to the east. This is good news for some, as rain looks to be ending for Trick or Treat time. Any lingering rain will be on the lighter side, but you'll still want to keep the umbrella handy!

Happy Halloween!