![]() Louis have never seen rain like this before."Īctivity is likely to continue through the mid-morning hours and then begin to wane later in the morning. "And because this boundary is not moving, these storms are going to continue to dive down and run into these same areas over the next several hours… People living in St. Louis and drop in rainfall rates of 2-4 inches per hour, which has led to the incredible rain reports we've seen – anywhere from 5-10 inches since midnight," Minar said. "And that's what allowed this band of rain to continue to filter in over St. The storms followed along that boundary, which veered a bit toward St. The rain will continue like a train track along that boundary." "There's really no mechanism to push this boundary north or south," Minar said. Meanwhile, the atmosphere in that area already had a copious amount of moisture available. THESE ARE THE RAINIEST HOUR AND MINUTE IN AMERICAN HISTORY So we see this boundary set up between these two and that's where that disrupting weather sits, and doesn't move." ![]() These two air masses butt up against each other but neither one wins out. "We have warm air to the south of (the front) - in fact, we have heat advisories in southern Missouri - and then we have colder air off to the north. "A warm front lifted (Monday) night, but then the boundary stalled out across the region," said FOX Weather Meteorologist Jane Minar. The historic rainfall is the combination of abundant atmospheric moisture and a frontal boundary that stalled over the heavily populated area. ![]() Louis Flash Flood EmergencyįOX Weather meteorologist Jane Minar explains the weather setup that led to a Flash Flood Emergency in St. FOX Weather explains setup that led to St.
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