Series Of Flood Episodes Likely For Miss/Tenn Valley, Mid-Atlantic As North-South Thermal Gradient Sharpens

Written by Mark Vogan on August 5, 2015 in Summer 2015, United States of America with 0 Comments

First and foremost, the system that was a mega rain producer for west-central Florida through the weekend and a possible contender of becoming a depression yesterday is now dwindling as it heads out to sea.

Visible satellite is very unimpressive this morning.

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It was fun and games through the Mid-Atlantic and coastal Northeast yesterday as the latest cold front pushed through bringing local flooding and severe weather. This has cleaned out the atmosphere and will hold temperatures below the 90 degree mark in Washington DC for the first time in nearly 2 weeks.

Credit: AccuWeather Pro

Next up, the attention is drawn to the mid-Mississippi/Tennessee Valley and even Mid-Atlantic where a storm is gathering, running the boundary separating hot air over Texas and much cooler, drier air over the Great Lakes. That’s the air now filtering into the Big Cities of the Northeast.

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As this system tracks east through Missouri, Tenn, Kentucky into the Mid-Atlantic, the risk of flooding rain and a fresh bout of severe weather increases later tomorrow (Thursday). The warm and moisture rich air being lifted north combined with already saturated ground means high risk for flooding.

This was a system I had highlighted as a possible trouble maker (flooding wise) a few days back.

Credit: AccuWeather Pro

Sizable rain amounts from Missouri to Maryland next 5 days.

Credit: AccuWeather Pro

As we go forward, there’s increasing confidence that a sharpening north-south thermal contrast develops between the Great Lakes and South. Have a dam of cool, dry air settle to the north of an increasingly hot, humid, late summer air mass in the south that wants to come up and they’ve got the recipe for MULTIPLE systems riding east in between. Further flood or flash flood episodes after the one is almost a certainty. This looks to be a very wet month for the Mid-Mississippi and Tennessee Valleys as well as the Mid-Atlantic and parts of the Southeast. Note the heat builds Out West, especially towards day 10-15.