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The National Weather Service in Tampa Bay described the unusual weather pattern best in a tweet Sunday morning: "If someone randomly showed up with this satellite image and told me to guess what month it was from...July would not be my first guess. It wouldn't be my second or third guess either."
Typically the jet stream flows in a flat west-to-east fashion near the Canadian border in July. That's why its current amplified north-to-south configuration over the eastern states is out of season.
Here's a look at some of the extreme weather we've seen from this developing weather pattern the past few days.
Coastal Storm Causes Flooding
Energy from the amplified jet stream pattern gave birth to a low-pressure system, which tracked along the East Coast Friday into Saturday. These so-called coastal storms are something you'd more typically see in spring or fall.
As a result, Saturday was unusually wet for July standards in the mid-Atlantic, including the Washington D.C. and Baltimore metro areas where flooding was reported.
Saturday was the second-wettest July calendar day on record in Baltimore (4.79 inches) and the fifth-wettest July day in Washington D.C. (4 inches).
The area of low pressure also produced wind gusts greater than 40 mph along the Northeast coastline. More than 16,000 customers lost power Saturday night in New Jersey due to the strong winds knocking down trees and power lines, the Associated Press reported.
Large Hail in the South in Late July
Golfball- to baseball-sized hailstones fell from the sky in parts of Alabama and Georgia on Saturday.
Original report > https://weather.com/news/news/2018-07-22-late-july-weather-pattern-odd
