Midwestern US to face multiple bouts of severe weather through midweek
By Kyle Elliott, AccuWeather meteorologist
July 11, 2017, 2:22:14 PM EDT
After a powerful complex of storms brought hail, damaging winds and heavy downpours to the Upper Midwest Sunday night and the Midwest on Monday night, rounds of severe thunderstorms will continue to rattle the midwestern United States.
“The active weather pattern that kicked off Sunday night will continue in the Midwest this week,” AccuWeather Senior Meteorologist Michael Doll said.
Storms on Monday night ravaged areas from western Pennsylvania to near the border of Illinois and Iowa.
AccuWeather Meteorologist Kyle Brown noted portions of the Upper Midwest may need to remain on alert for a few consecutive days.
Another area of unsettled weather is forecast to emerge from the northern Rockies into the northern Plains late in the day Tuesday, triggering a new complex of severe thunderstorms.
Because the storms will be feeding off an unusually moist and humid environment and will be moving rather slowly, the risk of flash flooding will again emerge as the most significant and life-threatening impact from the storms.
“The risk of flash flooding can be particularly dangerous overnight when it is hard to see water covering roadways,” Brown noted.
In the past week, some areas of northern and central Indiana have received 3 to as much as 6 inches of rain. It is quite possible that many locations in this corridor double those amounts in the next three days, making this additional rainfall especially problematic.
Residents living near streams, creeks and rivers should closely monitor water levels and have an evacuation plan in place should floodwaters encroach on their home and property.
Storms should first ignite in the eastern Dakotas late Tuesday afternoon before forming into an organized complex.
Strong, gusty winds and flooding downpours will again be the two primary threats from storms on Tuesday.
At first, large hail and even a few tornadoes may be the primary threats from these storms before damaging winds and flooding downpours become the dominant concerns by Tuesday night as the complex races south and eastward through Minnesota.
It may be until the middle of the night until storms reach Minneapolis and surrounding communities, putting a large number of people at risk while they sleep if and when severe weather threatens.
How much intensity the storms lose as they dive southeastward on Wednesday will determine if downpours and destructive winds reach Chicago or whether generally weaker storms impact the city.
By later in the week, the best chance of severe thunderstorms should shift farther south into the central U.S., but may return to the Midwest to kick off the upcoming weekend.
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