2026-27 US El Niño Snow Predictions: Where NOAA's Record Says Snow Goes

NOAA’s own summary of the evidence is that El Niño takes snow away from more of North America than it gives it to. Its phrase, from an analysis of 1959 to 2023, is that “El Niño appears to be the great snowfall suppressor over most of North America” — which is not the impression you get from a headline about a record-breaking event.

That matters this year, because the event really is heading for records. On 13 August 2026 the Climate Prediction Center put a very strong El Niño above 90% for the coming autumn and winter, and gave October to December a 69% chance of being the strongest since at least 1950.

Those two facts sit together uncomfortably, and the rest of this article is about how.

What did NOAA just say about El Niño’s strength?

Very strong is close to settled; record-breaking is likely but not certain.

The synopsis is unambiguous: El Niño is strengthening, with a greater than 90% chance of a very strong event during Northern Hemisphere autumn and winter. Beneath the surface, temperature anomalies reached +10.0 °C at depth, which is the reservoir that feeds the surface over the following months.

The 69% figure is the one worth reading twice. It is the probability that October to December produces a historic event — one exceeding every El Niño back to 1950, defined as a three-month RONI of +2.5 °C or more. So the gap between the two bars, about 21 points, is the part still open. It is not whether. It is how much.

Will El Niño bring more snow this winter?

For most of the country, the historical signal points the other way. NOAA’s snow composites are blunt about it: the below-average signal covers the Pacific Northwest, the northern Rockies, the Great Lakes, interior New England, western Canada and most of Alaska. The above-average signal is real but narrower.

The gains are concentrated where elevation keeps the extra moisture frozen. NOAA’s 1950-2009 analysis puts the largest positive departures in California, Nevada, Utah, Colorado, New Mexico and Arizona — the high country reached by the subtropical jet. A second, more consistent signal appears on the high plains of eastern Colorado, Nebraska, Kansas and northern Texas, and in the Mid-Atlantic and the southern Appalachians of West Virginia, Virginia and North Carolina.

The mechanism is the jet stream. El Niño pulls the subtropical jet north and east across the southern United States, which wets the southern tier, and weakens the northern storm track, which dries the north. Snow follows only where the wetter air is also cold enough.

Does a stronger El Niño mean more snow?

No, and NOAA says so directly. This is the single most misused idea in coverage of a record-breaking event: that a bigger number in the Pacific scales up into bigger impacts on land.

NOAA’s caveats, in its own framing, are four:

• Composites are retrospectives, not forecasts — average historical maps, not a prediction of this winter.
• El Niño “nudges the odds in favor of certain climate outcomes, but never ensures them”.
• A strong El Niño does not necessarily produce stronger impacts.
• The sample is small — roughly 20 events in the record — so confidence in any particular regional signal is limited, and other drivers can overshadow it.

The clearest illustration is the last very strong event. In 2015-16, Southern California stayed dry and the Pacific Northwest came in wet — close to the reverse of the textbook pattern, and the reverse of what most forecasts had said. A very strong El Niño was correctly forecast. The regional consequences were not.

Why can a wetter winter be a less snowy one?

Because El Niño’s southern tier is wetter partly by being milder, and a milder storm delivers rain. This is the trap in reading a precipitation outlook as a snow outlook. The same storm track that raises seasonal precipitation totals across the south can raise the freezing level with it, so the extra moisture arrives as rain at lower elevations and snow only above them.

It is why the gains in the table cluster in mountains and on the high plains rather than across the whole wet zone, and why a Sierra ski season and a Los Angeles winter can come out of the same pattern looking nothing alike.

Two further cautions carry over from any seasonal outlook. The biggest snow events do not come from the seasonal signal — a blocking pattern or a sudden stratospheric warming can deliver a month of snow in three days, and none of that is visible in August. And regional averages hide the extremes: 1982-83 was among the wettest US winters on record and also ran more than two degrees warmer than average nationally.

When does NOAA publish the actual snow forecast?

In the autumn, and it still will not be a snow map in the way people expect. The flagship Winter Outlook — the one with the regional temperature and precipitation maps that circulate every year — is issued by the Climate Prediction Center in the autumn, not in August. What exists now is the monthly ENSO discussion and the long-lead seasonal outlooks.

It is worth knowing that even that flagship product forecasts temperature and precipitation, not snowfall totals. Seasonal snowfall is not something NOAA issues as a national forecast map, which is precisely why articles promising “how much snow your state will get this winter” are working from something other than a NOAA forecast.

What this article cannot tell you

How much snow will fall where you live. Nothing here is a snowfall prediction, and we have not printed a total for any place this winter. What we have printed is the direction the historical record leans, region by region, with NOAA’s own warning that the record is a retrospective.

It also cannot tell you whether this winter behaves like the composite at all. Twenty events is a thin sample, the last very strong one inverted the expected west-coast pattern, and the drivers most likely to dominate any individual month — the Madden-Julian Oscillation, the polar vortex — are not predictable at this range.

For the temperature side of the same winter, and what past strong El Niño winters actually did to US temperatures, see our 2026/2027 US winter forecast . For what happens to the event itself after it peaks, we looked at the decay year .