Baltimore, MD - A massive rain storm developed yesterday bringing Baltimore to a standstill as waters flooded out key roadways in the city. At one point parts of 695 were underwater stranding cars in their place. At one point that National Weather Service put out Flash Flood Emergency statements warning residents to seek higher grounds due to the water accumulate to unprecedented rates.
The storm dumped officially 6.30" of rain at BWI airport making it the second rainiest day since historical records were being kept.
An impressive 2.70" of rain fell in 1 hour over the airport an event that happens on average every 50 years. In 2 hours 4.19" of rain fell in two hours which is only seen every 200 years!
In Green Haven, MD which sits in Anne Arundel County they received an amazing 10.32" of rain and areas just south and east of Baltimore city picked up over 6" of rain!
The rains that fell yesterday are typical for a tropical system and NOT an average thunderstorms however, yesterdays storm system was anything but average.
A powerful area of low pressure situated over the Ohio Valley was nearly stalled for much of Tuesday. This allowed for a jetstream to form over Maryland guiding moisture up the eastern seaboard. As the moist southerly flow increased across the state a southeasterly wind feed moisture off the Atlantic. These two moisture sources combined with weak thunderstorms to produce impressive rainfall rates. High rain rates combined with slow moving and rapidly developing storms caused rain to total near double digits.
Baltimore currently sits at 37.51 inches of rain. So far 2014 sits at 11.61" ABOVE its normal yearly rain fall (average is 25.90").
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