Sunday, October 4, 2026
A foot of extra ocean is moving up the West Coast
Pulses of warm water called Kelvin waves are lifting the sea by up to a foot and moving north up California at about 6 mph. Oregon and Washington are next. They don’t crash like a tsunami; the ocean sloshes like a bathtub. The waves run through February, and a super El Niño is behind them. California declared an emergency in September.
The Pacific Ocean is sloshing like water in a bathtub, and a bulge of it is sliding up the coast of California. It lifts the sea about as high as a ruler is long. Nobody can see it, and boats don’t bob on it. Beaches may get smaller this winter, and the grown-ups are piling up sand to be ready.
Why it worksA six-year-old reasons from what they can touch, so the script measures the sea with a ruler and makes the ocean a bathtub. Cantor found this age fears what it can picture, so the wave gets no crash, only a slosh. Expect “will our house get wet?” Say the water is only taller where it meets the beach, and the grown-ups are watching it.
- “Is the ocean getting taller?”
- A little, up to a foot in places, until February. A bulge of warm water is sliding up the coast. It doesn’t crash. It just sits higher.
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Winds along the equator usually push Pacific water west toward Asia. This El Niño they slackened, so the pile slid back east and up the coast. One bulge is moving up California at 6 mph, and alone it floods nothing. It’s a step stool: every high tide and storm this winter starts a foot higher.
Why it worksThis age is working out chains of cause and effect, so the script hands them one: wind slackens, water slides back, the coast gets a foot of ocean it did not order. The step stool is why a small rise matters in a storm. Expect “is this climate change?” Say El Niño is natural, and it lands on beaches warming already wore down.
- “Is this because of climate change?”
- No. El Niño is natural. It just lands on beaches already worn down.
- “Will it flood people’s houses?”
- Not alone. It lifts the sea a foot; a storm on top is the worry.
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When a scientist says a wave “floods nothing on its own,” is that reassuring or a warning? Kelvin waves are lifting the West Coast sea up to a foot through February, and the big El Niños set erosion records. Second: California declared an emergency before any storm. When is early too early?
Why it worksA teenager can hold two true things at once: the wave floods nothing by itself, and a foot of extra ocean under a winter storm wrecks a beach. The script gives them the NOAA scientist’s exact hedge and three record El Niños and asks which they hear. Expect “so what can anyone do?” Honest answer: pile sand and wait for February.
- “Is a foot really a big deal?”
- Alone, no. Add a storm and a high tide and it starts a foot higher.
- “Why declare an emergency so early?”
- Newsom says it lets the state stage resources before storms hit.
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Based on the headline: A foot of extra ocean is moving up the West Coast