Satellite imagery late Sunday night indicated a vigorous upper level weather disturbance over the Plains states. This system will have little impact on Chicago-area weather as it drops across Missouri on Monday. This area of atmospheric energy is forecast to trigger the development of another strong storm system off the East coast by Wednesday. As this new storm intensifies and lashes the Northeast with rain and wind, it will help keep Chicago's temps below normal. A second storm system is expected to develop over the Plains states by Friday. Unlike its predecessor, this low will move well west of Chicago, bringing a reversal in wind flow. As a result, area temperatures are expected to turn unseasonably mild over the weekend. Highs on Saturday may reach the 70-degree mark. Along with the influx of mild air will be an increasing threat of rain.
Storm-generating weather disturbance to pass west of Chicago
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