Slow-moving thunderstorms will bring the potential for heavy rainfall and flash flooding overnight and into the morning hours of Sunday across the Mid-Mississippi River Valley. The city of St. Louis and surrounding communities on both sides of the river---in Missouri and Illinois---should brace for the possibility of inclement weather.
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These thunderstorms will generally move in a northwest-to-southeast direction and will "train" over the same locations in a short period of time. Training thunderstorms are capable of producing excessive rainfall totals. Because of this, a Flash Flood Watch is in effect for parts of eastern Missouri and western Illinois through mid-morning Sunday.
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Morning thunderstorms will give way to sunshine by Sunday afternoon. Unfortunately, more rain is in the forecast. Rounds of thunderstorms---leading to the possibility of more heavy rain and flash flooding---will impact the central United States in the days ahead. A cold front positioned to the north that will bring the risk of
severe thunderstorms to the Upper Midwest on Sunday will increase the threat on Monday from Kansas to Michigan.
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Rain totals will likely range between 2 and 5 inches, but may exceed 6 or 7 inches in a few isolated areas. The week ahead will include several chances for showers and thunderstorms in cities such as St. Louis.
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