Monday, August 21, 2017

Weather Update Monday Evening

Isolated showers and thunderstorms have developed this evening ahead of a cold front that is forecast to move through northern Illinois and southern Wisconsin early Tuesday.


Our severe threat has lowered from earlier thinking today, but thunderstorms are expected to move in closer towards 9pm/10pm this evening.  There are a few showers and isolated storms that have developed south of Rockford.  These are along the leading edge of an increase in moisture aloft.  A more significant line of thunderstorms is currently moving into eastern Iowa and could impact our western and southwest counties around 10pm.  Heavy rainfall looks to be the biggest threat with any of these storms, but some of the stronger cells will be capable of producing a strong wind gust or two.


Thunderstorm coverage may increase around, and shortly after, Midnight as the cold front moves east.  There will be a few lingering showers/storms Tuesday morning, but drier air moves in and will help clear some of the cloud cover by Tuesday evening.

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