Weather In The USA 2023-up

[Mark]

A mid-April storm has delivered a sharp reversal in the Sierra Nevada.

At Palisades Tahoe, 22 inches fell in 24 hours, pushing the three-day total to 43 inches (109 cm). Snow levels dropped to around 4,000 ft (1,200 m), bringing higher-quality snow to upper elevations.

A second core hit landed farther south.

Near Mammoth Lakes, more than 3.5 ft (1+ m) fell over the weekend, including 42.5 inches (108 cm) between Friday and Sunday. Blizzard conditions forced the closure of Interstate 80 through the Sierra.

The pattern shift is not isolated.
https://electroverse.substack.com/p/late-season-surge-hits-sierra-spring

[Mark]

A strong cold front descends into the central and eastern United States this weekend, ending the current warmth and flipping temperatures back to well below average.

The driver is upstream. A deep trough tied to that persistent Hudson Bay ‘polar vortex’ — still unusually strong for mid-April — is releasing colder air south as the eastern ridge breaks.
https://electroverse.substack.com/p/cold-front-to-slam-eastern-us-antarctic