Name: SnowSure MCP Server
Author: SnowSure

Tier A — Prime El Niño terrain

South America

Closed for the season

Best months to book: August, July, September · last season + 30-yr record

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Not operating today

Weather data is still collected for informational purposes.

Last Snowfall

Sep 21

today

Past 24 Hours

3cm

Resort reported

Past 48 Hours

41cm

Past 10 Days

56cm

7-Day Forecast

23cm

Snow Depth

🎿

Powder Days

2026 season

☀️

Bluebird Days

2026 season

☀️❄️

Bluebird Day predicted: Sun

Updated: Sep 21, 2:01 PM•Weather at base: 1,400m

SnowSure™ ScoreAI

Not operating today

Antuco is closed for the season. Here is when it is usually best to book.

August

#1 to book

169cm avg · scored 68.2

July

#2 to book

162cm avg · scored 47.7

September

#3 to book

88cm avg · scored 61.5

Best weeks to book

#131 Jul – 6 Augscored 76.3
#221 Aug – 27 Augscored 67.6
#37 Aug – 13 Augscored 64.3

Ranked on 25% last season's SnowSure score (2026) · 75% 30-year snowfall and base-depth record. The live score returns when the lifts turn.

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Depth

Resort closed — no current ski-base depth.

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Recent

In the last 7 days, 49cm of snow has fallen, with 41cm in the past 48 hours.

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Forecast

23cm in the next 7 days.

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Historic

This season's snowfall to date is 131% of the 5-year average.

Not operating today · Data updated Mon, Sep 21, 02:01 PM UTC · informational only

Snow Summary

1,850m

ECMWF GFS GEM JMA ICON Météo-Fr

Updated Sep 21, 2026 at 2:01 PM

56cm

24h

23cm

Past 10d

7-Day Forecast

Prev10d

Now21

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T22

W23

T24

F25

S26

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S27

Days 8–14 and every model are in Pro.Unlock with Pro

Past

Today

Forecast

56cm

24h

23cm

Pro

Past 10 Days

7-Day Forecast

Days 8–14

56cm

Previous10 Days

TODAYSep 21

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TueSep 22

WedSep 23

ThuSep 24

FriSep 25

SatSep 26

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SunSep 27

Days 8–14 and every model are in SnowSure Pro.

Unlock with Pro

Previous 10 Days

Today / High Snow

7-Day Forecast

Weekend

Historical data from Open-Meteo archive • Forecast: SnowSure™ multi-model blend

Hourly Forecast

	21 Mon 2° / -6°			22 Tue 7° / -2°			23 Wed 4° / 0°			24 Thu 2° / -1°			25 Fri 6° / -0°			26 Sat 7° / 2°			27 Sun 7° / -1°			Days 8–14 and every model are in SnowSure Pro.Unlock with Pro
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	28 Mon	29 Tue	30 Wed	1 Thu	2 Fri	3 Sat	4 Sun
Conditions	☁️	☀️	☁️	☁️	☁️	☁️	❄️	🌧️	❄️	❄️	❄️	❄️	❄️	🌧️	🌧️	☁️	🌧️	🌧️	☁️	🌤️	☀️	❄️	❄️	❄️	☁️	🌧️	☁️	❄️
	cloudy	clear	cloudy	cloudy	cloudy	cloudy	light snow	light drizzle	snow	snow	snow	heavy snow	light snow	light drizzle	drizzle	cloudy	drizzle	light drizzle	cloudy	mostly clear	clear	light snow	light snow	light snow	cloudy	light rain	cloudy	snow
Summit1,850 mModeled
Temp°C	-5°	1°	-3°	1°	6°	0°	1°	3°	1°	1°	1°	0°	1°	5°	1°	4°	6°	2°	2°	6°	2°	0°	-1°	-1°	4°	2°	2°	1°
Feels like°C	-9°	-2°	-7°	-3°	3°	-3°	-2°	-1°	-3°	-4°	-3°	-4°	-2°	2°	-2°	1°	3°	0°	0°	3°	-1°	-3°	-5°	-5°	2°	-2°	0°	-2°
Snowcm	0.1	·	2.7	·	·	·	2.2	0.3	8.3	5.7	4.6	19.5	2.9	·	12.3	·	·	0.4	·	·	·	5.2	0.7	2.7	0.3	2.4	0.6	8
Precipmm	0.1	·	3.9	·	·	1.4	5.1	2.7	17.3	9.7	9.7	29.5	5.0	2.2	21.1	0.1	5.9	18.5	·	·	4.1	7.4	1.0	3.8	1.8	16.6	2.8	15.2
Windkm/h	5	9	8	3	9	4	7	14	10	17	13	12	7	11	7	6	7	5	3	10	3	4	15	5	2	12	5	4
Mid-mountain1,625 mModeled
Temp°C	-3°	2°	-1°	2°	8°	2°	3°	5°	2°	2°	3°	2°	3°	7°	3°	5°	8°	4°	4°	7°	3°	1°	1°	0°	6°	4°	4°	2°
Feels like°C	-7°	0°	-5°	-1°	4°	-2°	0°	1°	-1°	-2°	-1°	-2°	0°	4°	0°	3°	5°	1°	2°	5°	1°	-1°	-3°	-3°	4°	0°	2°	0°
Snowcm	0.1	·	2.7	·	·	·	0.8	0.3	4.6	4	4.3	14	0.8	·	7.5	·	·	0.4	·	·	·	2.6	0.7	1.3	·	·	0.1	4.9
Precipmm	0.1	·	3.9	·	·	1.4	5.1	2.7	17.3	9.7	9.7	29.5	5.0	2.2	21.1	0.1	5.9	18.5	·	·	4.1	7.4	1.0	3.8	1.8	16.6	2.8	15.2
Windkm/h	5	9	8	3	9	4	7	14	10	17	13	12	7	11	7	6	7	5	3	10	3	4	15	5	2	12	5	4
Base1,400 mModeled
Temp°C	-2°	4°	0°	4°	9°	3°	4°	6°	4°	4°	4°	3°	4°	8°	4°	7°	9°	5°	5°	9°	5°	3°	2°	2°	7°	5°	5°	4°
Feels like°C	-5°	1°	-4°	0°	6°	0°	1°	2°	1°	0°	0°	0°	2°	6°	2°	5°	7°	3°	3°	7°	3°	0°	-2°	-1°	6°	2°	4°	1°
Snowcm	0.1	·	2.7	·	·	·	0.8	0.3	4.6	4	4.3	13.4	0.8	·	7.2	·	·	0.4	·	·	·	2.2	0.7	1.3	·	·	0.1	3.6
Precipmm	0.1	·	3.9	·	·	1.4	5.1	2.7	17.3	9.7	9.7	29.5	5.0	2.2	21.1	0.1	5.9	18.5	·	·	4.1	7.4	1.0	3.8	1.8	16.6	2.8	15.2
Windkm/h	5	9	8	3	9	4	7	14	10	17	13	12	7	11	7	6	7	5	3	10	3	4	15	5	2	12	5	4
Humidity%	89	47	77	46	44	60	89	75	89	89	87	96	94	76	94	87	71	92	95	62	84	94	83	80	71	91	71	95
0°C linem	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—

Forecast Range · SnowSure Pro

Every model for Antuco, side by side for 14 days

Where the models agree, where they split, and which one has been most accurate here. Free for 14 days, then yearly.

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SnowSure™ blend — verified model weighting

The black line is not a simple average. For Antuco (andes), we combine seven global weather models using weights learned from daily forecast verification — comparing each model's prediction to measured snowfall (SNOTEL, resort reports, ERA5).

1.Horizon buckets: days 1–3, 4–7, and 8–14 each get separate weights — short-range skill differs from long-range.
2.Regional calibration: weights come from verified error in this geography (Rockies, Alps, Japan, etc.), recalculated weekly.
3.Ground truth only: we never grade a forecast against another model — only against measured snow.

Building verification history for this resort.

How we verify forecasts →

Snowfall Forecast Maps

Andes (Chile & Argentina) region

El Niño Outlook · Winter 2026

Antuco El Niño rank & forecast

Antuco ranks #42 of 488 SnowSure resorts — Tier A, +13% in strong El Niño winters.

Tier A — Prime El Niño terrain: Historically snowed much more than normal in strong El Niño winters (≥ +8% vs this resort’s own 30-year average).

#42 of 488Tier A — Prime El Niño terrain

Strong-event signal: +13% vs this resort's 30-yr avg

In the three strongest El Niño winters on record ('97-98, '15-16, '23-24), Antuco averaged +13% versus its own 30-year snowfall baseline. The pattern has historically been a friend here. With a record-strength event forecast for winter 2026, Antuco sits on the favorable side of the ledger. Analog winters: '97-98 +3%, '15-16 +3%, '23-24 +32%. A pattern, not a promise.

'97-98 +3%'15-16 +3%'23-24 +32%

In-season scorecard

Predicted signal

+13%

Measured to date

+39%

Season total

788 cm

Vs predicted

+26%

Predicted signal vs measured season-to-date against this resort's own climatology.

Signal = average snowfall in the three strongest El Niño winters since 1996 ('97-98, '15-16, '23-24) vs this resort's own 30-year ERA5 baseline. n=3 — a lean, not a law. Updated monthly against measured snowfall Dec–Mar.

Full El Niño report →

Key

What the tiers mean

% vs each resort's own 30-year average in strong El Niño winters.

Tier	Signal	Means
A — Prime terrain	≥ +8%	Historically much snowier than normal.
B — Favored	+3% to +8%	Modest upside vs normal.
C — ENSO-proof	about −3% to +3%	Near-normal snowfall — a hedge, not a jackpot or bust.
D — Late bloomer	−3% to −8%	Often lighter early — aim Feb–Mar.
E — Timing play	≤ −8%	Often lighter overall — aim late winter.

ENSO seasonal analog

History · not a forecast

In 6 past El Niño winters at Antuco, ERA5 season snowfall median was 686 cm (270 in), about this resort’s long-term median. This is a historical analog from reanalysis — not a prediction of this winter’s storm track.

Prevailing ONI

El Niño

JJA 2026 · ANOM +1.8°C

Analog season median

686cm

6 El Niño winters · ≈ long-term median

All-season median

689cm

Across 31 ERA5 seasons (2026)

Phase	Seasons	Median	p25–p75	Recent analogs
El Niñocurrent	6	686cm	681cm – 808cm	2026, 2023, 2015, 2009, 2002, 1997
La Niña	4	679cm	540cm – 750cm	2022, 2010, 1999, 1998
ENSO-neutral	21	700cm	532cm – 766cm	2025, 2024, 2021, 2020, 2019, 2018

Season snowfall from Open-Meteo ERA5 reanalysis (~9 km). ENSO phase from NOAA CPC Oceanic Niño Index. Relative phase differences are more trustworthy than absolute cm totals. Source: NOAA CPC Oceanic Niño Index + Open-Meteo ERA5 via SnowSure season archive.

Local Reports

0 reports

How accurate is this forecast?

We verify every forecast against what actually fell — see the model-by-model results.

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