Only found 25 years ago (Duplicate in C.A. moved here as it is WET science)
"In February 2022, (atmospheric river) one dumped cubic kilometres of water onto the city of Brisbane. An atmospheric river is a narrow, fast-flowing stream of moist air. It can be many thousands of kilometres long, and a few hundred wide. It’s a giant and invisible conveyor belt of water in the sky, moving above and across the planet.
Part one "A discovery in weather in the 1990s was the Atmospheric River. They've been around for pretty much ever though - one of them bankrupted California in 1862, and another dumped lots and lots of water onto Brisbane, in February 2022."
Part 2
and Nat Geo-link
"At any given moment, there are about a dozen of these atmospheric phenomena across the globe – most of them over water. But, unlike a land-based river, they are not fixed in location. Instead, they continually form, fade, reform and evolve. So they come and go.
Atmospheric rivers are essential to the water cycle. They shift 90 per cent of the air’s water vapour, but cover less than 10 per cent of the planet. A big atmospheric river can move a quarter of a million tonnes of water each second past a given point. If one gets really big, it can be disastrous.
In 1862 an atmospheric river turned Central California into a temporary inland sea, 500km long and 30km wide. Not only did thousands of people die, so did one-quarter of the 800,000 head of cattle in California at the time.
Sacramento, the state capital, was flooded with more than three metres of muddy water and took six months to completely dry out. By then, California was bankrupt. And just for a little extra ecological impact, the water in San Francisco Bay turned from salt water to fresh water.
The atmospheric river that hit Australia’s east coast in March 2021 caused several fatalities, forced the
evacuation of more than 24,000 people, and cost the Australian economy about $652 million.
"
The current rains are NOT Atmospheric rivers
I suspect some what are termed "Cloud Bursts" might be related ? I think I may have seen two in my life.


 
						
					 
					
					 Originally Posted by ramblingboy42
 Originally Posted by ramblingboy42
					
 
				
				
				
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