But the inter-annual variability of these storms is so great that this signal will not emerge from the noise until around 2080.
"We never had a weather condition as adverse as this, but we always knew that as the water warmed, there's a great deal more energy to these storms, " said former Lt.
The storms weren't restricted to the Great Plains and Midwest.
In addition to its Great Red Spot, astronomers have been following three smaller storms, known as white ovals, for the past 50 years.
But severe storms are possible along a line from the southern Great Lakes to the Louisiana coast, the Storm Prediction Center said.
Unlike the long-lived storms of Jupiter, one of which (the Great Red Spot) has been tracked continously by observers for many decades, Neptune's spots seem to be relatively short-lived.
To combat the surge in storms and waves, the government has built what locals call the Great Wall of Male: a concrete barrier 1.8-metre (6 ft) high that partly rings the capital.
Storms are expected to move east on Wednesday and will extend from the Great Lakes south-southwestward into the Ohio River Valley and into the Deep South.
During Papa Mau's journey, he weathered gale force storms, fended off sharks, spent more than 365 days at sea, skirted around the Great Barrier Reef, and finally battled and surfed the East Australian Current (EAC) to reach his final destination in Hervey Bay near Bundaberg, Queensland, Australia.
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The National Weather Service said the work week could begin with storms bringing showers to the Northeast and mid-Atlantic and large hail and high winds to the Great Plains.
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