Name: SnowSure MCP Server
Author: SnowSure

Tier A — Prime El Niño terrain

South America

Superb

↗improving

Scroll for happiness

Last Snowfall

Sep 22

today

Past 24 Hours

0cm

Resort reported

Past 48 Hours

0cm

Past 10 Days

36cm

7-Day Forecast

38cm

Snow Depth

130cm

Resort reported

🎿

Powder Days

2026 season

☀️

Bluebird Days

2026 season

Updated: Sep 22, 4:02 AM•Weather at base: 2,240m

SnowSure™ ScoreAI

Superb

↑improving

Exceptional season - 746cm already this season!

Las Leñas is currently experiencing overcast conditions with a temperature of -6°C. The snow depth stands at 130cm, and the resort has received 34cm of new snow in the last week, contributing to a strong season total of 746cm.

AI-generated summary

✓

Depth

130cm depth — excellent coverage.

—

Recent

In the past week, 34cm of new snow has fallen.

✓

Forecast

38cm in the next 7 days.

✓

Historic

This season-to-date's snowfall of 746cm is 169% of the 5-year average of 440cm.

Data updated Tue, Sep 22, 04:02 AM UTC

Snow Summary

3,430m

ECMWF GFS GEM JMA ICON Météo-Fr

Updated Sep 22, 2026 at 4:02 AM

36cm

24h

38cm

Past 10d

7-Day Forecast

Prev10d

Now22

W23

T24

F25

S26

S27

M28

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

Past

Today

Forecast

36cm

24h

38cm

Pro

Past 10 Days

7-Day Forecast

Days 8–14

36cm

Previous10 Days

TODAYSep 22

WedSep 23

ThuSep 24

FriSep 25

SatSep 26

SunSep 27

MonSep 28

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

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Previous 10 Days

Today / High Snow

7-Day Forecast

Weekend

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

Hourly Forecast

	22 Tue -1° / -6°			23 Wed -2° / -5°			24 Thu -5° / -7°			25 Fri -2° / -8°			26 Sat -0° / -5°			27 Sun -2° / -7°			28 Mon -4° / -7°			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	29 Tue	30 Wed	1 Thu	2 Fri	3 Sat	4 Sun	5 Mon
Conditions	❄️	🌤️	❄️	❄️	❄️	❄️	❄️	❄️	❄️	☁️	☁️	❄️	☁️	☁️	❄️	☀️	☀️	🌤️	🌤️	🌤️	❄️	🌤️	❄️	❄️	❄️	❄️	❄️	❄️
	light snow	mostly clear	light snow	snow	light snow	snow	snow	heavy snow	snow	cloudy	cloudy	light snow	cloudy	cloudy	light snow	clear	clear	mostly clear	mostly clear	mostly clear	snow	mostly clear	light snow	snow	light snow	snow	light snow	light snow
Summit3,430 mModeled
Temp°C	-5°	-1°	-4°	-4°	-3°	-4°	-6°	-6°	-6°	-6°	-3°	-6°	-4°	0°	-4°	-6°	-2°	-5°	-6°	-4°	-7°	-8°	-4°	-4°	-6°	-6°	-6°	-6°
Feels like°C	-10°	-4°	-10°	-9°	-7°	-9°	-11°	-12°	-11°	-11°	-6°	-11°	-7°	-4°	-8°	-10°	-5°	-9°	-10°	-7°	-11°	-12°	-9°	-8°	-10°	-11°	-10°	-9°
Snowcm	0.3	·	0.4	1.9	1.5	3.2	3.6	9	11	0.2	0.1	4.7	0.1	·	0.5	·	0.4	0.8	·	1.3	2.9	0.8	0.4	5.5	1	4.8	2.7	6.8
Precipmm	0.4	·	0.5	2.7	2.2	4.6	4.9	12.8	15.7	0.3	0.2	6.7	0.2	·	0.7	·	0.6	1.2	·	1.8	4.2	1.2	0.6	7.8	1.4	6.8	3.8	9.8
Windkm/h	15	14	16	15	17	16	16	16	15	15	11	13	6	8	8	8	9	8	7	9	9	13	16	13	14	13	10	9
Mid-mountain2,835 mModeled
Temp°C	-1°	3°	-1°	0°	1°	0°	-2°	-2°	-2°	-2°	1°	-2°	0°	3°	0°	-2°	2°	-1°	-2°	0°	-3°	-4°	-0°	0°	-2°	-2°	-2°	-2°
Feels like°C	-5°	0°	-5°	-5°	-3°	-5°	-7°	-7°	-7°	-7°	-2°	-7°	-3°	0°	-3°	-5°	0°	-5°	-6°	-3°	-7°	-8°	-5°	-4°	-6°	-7°	-6°	-5°
Snowcm	0.3	·	0.4	1.9	1.5	3.2	3.6	9	11	0.2	0.1	4.7	0.1	·	0.5	·	0.4	0.8	·	1.3	2.9	0.8	0.4	5.5	1	4.8	2.7	6.8
Precipmm	0.4	·	0.5	2.7	2.2	4.6	4.9	12.8	15.7	0.3	0.2	6.7	0.2	·	0.7	·	0.6	1.2	·	1.8	4.2	1.2	0.6	7.8	1.4	6.8	3.8	9.8
Windkm/h	15	14	16	15	17	16	16	16	15	15	11	13	6	8	8	8	9	8	7	9	9	13	16	13	14	13	10	9
Base2,240 mModeled
Temp°C	3°	7°	3°	4°	5°	4°	2°	1°	2°	2°	5°	2°	4°	7°	4°	2°	5°	3°	2°	4°	1°	0°	3°	4°	2°	2°	1°	2°
Feels like°C	-1°	4°	-1°	0°	1°	-1°	-2°	-3°	-2°	-3°	3°	-2°	2°	5°	1°	-1°	4°	0°	-2°	2°	-3°	-4°	-1°	1°	-1°	-2°	-1°	-1°
Snowcm	0.3	·	0.4	1.9	1.5	3.2	3.6	9	10.9	0.2	0.1	4.7	0.1	·	0.5	·	0.4	0.8	·	1.3	2.9	0.8	0.4	5.5	1	4.8	2.7	6.8
Precipmm	0.4	·	0.5	2.7	2.2	4.6	4.9	12.8	15.7	0.3	0.2	6.7	0.2	·	0.7	·	0.6	1.2	·	1.8	4.2	1.2	0.6	7.8	1.4	6.8	3.8	9.8
Windkm/h	15	14	16	15	17	16	16	16	15	15	11	13	6	8	8	8	9	8	7	9	9	13	16	13	14	13	10	9
Humidity%	82	69	82	94	83	94	91	95	95	88	90	89	85	57	81	79	78	83	62	88	81	69	66	96	94	88	92	90
0°C linem	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2,780	2,370	2,430	2,360	2,190	2,200	2,315
Sunhours																						9.9	9.6	9	9.7	9	9.2	9.7

Freeze line is the height where rain turns to snow. Plain: straight from the models. Marked ○: estimated from temperature. Sun is hours of actual sunshine, not day length; blank means we have no reading.

Forecast Range · SnowSure Pro

Every model for Las Leñas, 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 Las Leñas (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

Las Leñas El Niño rank & forecast

Las Leñas ranks #3 of 488 SnowSure resorts — Tier A, +68% 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).

#3 of 488Tier A — Prime El Niño terrain

Strong-event signal: +68% vs this resort's 30-yr avg

In the three strongest El Niño winters on record ('97-98, '15-16, '23-24), Las Leñas averaged +68% versus its own 30-year snowfall baseline. The pattern has historically been a friend here. With a record-strength event forecast for winter 2026, Las Leñas sits on the favorable side of the ledger. Analog winters: '97-98 +54%, '15-16 +3%, '23-24 +147%. A pattern, not a promise.

'97-98 +54%'15-16 +3%'23-24 +147%

In-season scorecard

Predicted signal

+68%

Measured to date

+108%

Season total

746 cm

Vs predicted

+40%

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 Las Leñas, ERA5 season snowfall median was 600 cm (236 in), about 76% above 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

600cm

6 El Niño winters · 76% above median

All-season median

340cm

Across 31 ERA5 seasons (2026)

Phase	Seasons	Median	p25–p75	Recent analogs
El Niñocurrent	6	600cm	472cm – 659cm	2026, 2023, 2015, 2009, 2002, 1997
La Niña	4	289cm	222cm – 333cm	2022, 2010, 1999, 1998
ENSO-neutral	21	323cm	280cm – 507cm	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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