Yesterday, Washington D.C. experienced its heaviest rainfall on record:
In just an hour, about a month’s worth of rain drowned the District, a staggering 83 mm falling at Reagan National Airport.
This hourly output was Washington’s highest since at least 1936 (National Airport is the city’s official weather observing site), the Maxar Weather Desk, a consulting group based in Gaithersburg, Md. discovered.
“According to data from the Iowa Mesonet ... the 83 mm recorded between 8:52-9:52 AM yesterday was Washington DC’s highest hourly precip report in records dating back to 1936," Maxar tweeted.
As Monday’s torrent raged, the first-ever flash flood emergency was declared for the city as well as nearby Arlington and Alexandria, which suffered damaging downpours.
In total, it rained 11.4 billion litres on the city.
Meanwhile, closer to home, the Great Lakes remain at or near record levels.