USA Weather Alert and Warnings Thread

The National Weather Service issued extreme heat warnings on Friday for much of the southwest, from Los Angeles and coastal southern California to Las Vegas. Authorities also warned against leaving children or pets in cars. The unusually intense heat, arriving as winter ends, has alarmed climate experts.

“This heat wave would be virtually impossible for the time of year in a world without human-induced climate change,” the World Weather Attribution network said in a report.

“These findings leave no room for doubt. Climate change is pushing weather into extremes that would have been unthinkable in a pre-industrial world,” said Friederike Otto, a professor at Imperial College London.

The scientists described the event as so rare that, despite rising global temperatures, such extremes would be expected only once every 500 years.

“In the US West, the seasons people and nature relied on for centuries are disappearing, putting many — including outdoor workers and those without air conditioning — at risk,” she said. “The threat isn’t distant — it is here, it is worsening, and policy must catch up with reality.”
 
‘This is global warming’

Scientists say there is overwhelming evidence that today’s heat waves are a clear marker of global warming, driven primarily by the burning of fossil fuels.

With the northern hemisphere exiting winter and entering astronomical spring on Friday, the soaring temperatures are already affecting wildlife in the West. Many plants and trees are blooming early, with vegetation growing rapidly after heavy rains in December and January.

“This is very unusual. We’re still in winter,” she said.

“But this is global warming. The East Coast is seeing tornadoes and snow, and here we are, sizzling.”

Terry Salas, a resident in Los Angeles, said recent weather patterns across the United States had been unusual.

“We’re having summer temperatures that we never, ever had in March.”
 

Thousands evacuated as Hawaii faces worst flooding in 20 years​

Anna Lamche and Kayla Epstein
BBC

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Watch: Flood-hit Hawaii seen from above

Hawaii remains under a statewide flood watch after a severe storm hit the state and prompted officials to order evacuations.

The potential for flash floods threaten the island of Oahu and parts of Maui County, Governor Josh Green said on Saturday.

The storm that struck this weekend is the second severe weather event to hit the archipelago in the last week.

Some parts of the state received 40 to 50in (127cm) of rain in the last 10 days, according to Green. Oahu could receive four to six more, while parts of Maui could experience between four to 12in, he said.

"Don't take this storm lightly," Green said in a video statement. No deaths had been reported, he said, but there have been few serious injuries.
 
"This is the largest flood that we've had in Hawaii in 20 years," he told the news conference on Friday.

Honolulu Fire Department A building collapsed in high muddy floodwaters


Honolulu Fire Department

A building collapsed in high muddy floodwaters

The governor urged residents to seek out shelters and assembly areas across the state.
The island was in the grip of a "Kona Low", a slow-moving area of low pressure that pulls in warm, moisture-rich air across the Hawaiian islands, bringing heavy rain and flash flooding.

Honolulu Fire Department Two men and two dogs stand on a tractor in floodwater


Honolulu Fire Department

Some areas received more than 10in of rainfall and winds of up to 100mph (160km/h).
The storm is the latest challenge for the island, which frequently deals with the fallout of natural disasters such as the 2023 Lahaina wildfires, which left more than 100 people dead.
 
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Good, hope half of Oklahoma burns today.
 
April 7th and it’s snowing out in the Boston area. Here I was prepping my lawn yesterday
 
April 7th and it’s snowing out in the Boston area. Here I was prepping my lawn yesterday
Going to be 75°F, sunny, and no 45 mph prairie wind gusts.

Yea! The two weeks of Spring in Oklahoma before the air conditioners come on.
 
We got rain yesterday afternoon and back to running the heat late at night.
 
We got rain yesterday afternoon and back to running the heat late at night.

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Spring snow falls in Boston area on April 7​

 
Some predicting 2027 will be warmest on record.

Droughts, flooding, etc.

Good news is less hurricanes.

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It was about 90° here in the Philadelphia burbs today.
 

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