A few strong weather systems will bring more waves of precipitation our way next week, along with a big drop in temperatures. Before we get there, we may see a shower or two Sunday afternoon along a passing cold front. But moisture will be limited with lots of dry air in the low levels, so only an isolated shower may be possible. That said, I suspect many will remain dry. Some spots of clearing may allow temperatures to warm into the low 60s, but clouds will keep most in the 50s.
Our first widespread weather system will bring wave of rain showers between Monday and Tuesday. Some spots could see near 0.5-1.0" of rainfall, highest totals likely across NW Illinois into Iowa and Wisconsin, following the track of the low-pressure center. During this time. temperatures will remain mild, with highs in the 50s and 60s through Tuesday.
A second area of low pressure will develop Wednesday into Thursday just East of the Stateline, placing us on the cool end of the low with a strong rush of cool air flowing in behind the low. The strong low pressure will also develop a tight pressure gradient locally, allowing for strong winds mid-week.
You may have seen some speculation about the type of precipitation next week on the back edge of this system. For some clarification, it is very tricky to determine precipitation type this far out for a system where a margin of only a couple degrees means the difference between rain or two. We can say we are confident there will be a strong low pressure Thursday bringing a big draw of cold air with some lingering moisture. We don't know the exact placement of that low or how strong the push of cold air will be. As such, it is hard to determine precipitation type being 5 days away from this system. *IF* we see enough moisture and cold air, we *might* see a few snowflakes trying to mix in with rain in the Wednesday-Thursday window. Stay tuned as the details of this system become more refined next week!
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