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PeakCam

14-day multi-model blend · 7 models

Portillo snow forecast

As of the 2026-10-20 runs: 4.3″ in the next 7 days and 9.3″ over 14 at the summit, the biggest day 2″, the median of 7 models.

Central Andes · Chile

Summit blend, next 14 days

Summit point at 10,860 ft · issued · 7 models: ECMWF IFS 0.25°, GEM, GFS, ICON, JMA, ARPEGE/AROME, UKMO.

Next 48 h
3.3″
Next 7 days
4.3″
Next 14 days
9.3″
Biggest day
2″ on Tue, Oct 27
DaySkySnow (median)Low – highHigh / lowPrecipGustModels
✳✳✳1.5″0.9″ – 2.4″33° / 25°100%21 mph7
✳✳✳1.7″1″ – 1.9″32° / 24°100%27 mph7
–0″ – 0.2″33° / 18°86%20 mph7
––31° / 22°51%19 mph7
✳✳✳0.7″0.1″ – 1.3″27° / 17°52%17 mph6
✳✳✳0.3″0.2″ – 0.8″28° / 16°82%13 mph6
–0″ – 0.1″35° / 19°27%17 mph6
✳✳✳1.7″1.3″ – 2.6″31° / 24°92%7 mph4
✳✳✳2″1.4″ – 2.2″30° / 22°65%8 mph4
✳✳✳1.1″0.9″ – 1.3″31° / 23°49%9 mph4
✳✳✳–0″ – 0.4″35° / 20°47%18 mph3
✳✳✳0.2″0.2″ – 0.2″38° / 28°32%18 mph2
––38° / 26°26%15 mph2
––43° / 30°43%15 mph2
Every model at the summit (7 runs) — snowfall in inches per day
ModelIssuedHorizon10-1910-2010-2110-2210-2310-2410-2510-2610-2710-2810-2910-3010-3111-01
ECMWF IFS 0.25°ECMWF14 d1.41.90.30.21.50.4011.81.100.10.10
GEMEnvironment Canada10 d2.30.80000.204.52.31.2––––
GFSNOAA NCEP14 d3.11.2001.40.2020.20.500.200
ICONDWD7 d0.51.70.20000.1–––––––
JMAJapan Meteorological Agency11 d1.521.30.11.10.90.11.52.21.40.9–––
ARPEGE/AROMEMétéo-France4 d0.20.300––––––––––
UKMOUK Met Office7 d2.52000.20.90–––––––

A dash means the model does not reach that day. Runs are the newest per model within 36 hours.

Base blend, next 14 days

Base point at 9,449 ft · issued · 7 models: ECMWF IFS 0.25°, GEM, GFS, ICON, JMA, ARPEGE/AROME, UKMO.

Next 48 h
2.2″
Next 7 days
3.5″
Next 14 days
7.8″
Biggest day
2″ on Tue, Oct 27
DaySkySnow (median)Low – highHigh / lowPrecipGustModels
✳✳✳1.4″0″ – 1.7″39° / 30°100%20 mph7
✳✳✳0.8″0.1″ – 1.5″37° / 29°100%23 mph7
✳✳✳–0″ – 0.2″38° / 23°86%22 mph7
✳✳✳––36° / 27°51%20 mph7
✳✳✳0.9″0.1″ – 1.5″32° / 23°52%12 mph6
✳✳✳0.3″0.1″ – 0.8″33° / 21°82%13 mph6
––39° / 24°27%17 mph6
✳✳✳1.4″1″ – 2.4″36° / 28°92%7 mph4
✳✳✳2″1.3″ – 2.2″35° / 27°65%8 mph4
✳✳✳0.9″0.6″ – 1.1″36° / 29°49%9 mph4
✳✳✳–0″ – 0.4″40° / 25°47%18 mph3
–0″ – 0.1″43° / 35°32%18 mph2
––44° / 33°26%15 mph2
––48° / 36°43%15 mph2
Every model at the base (7 runs) — snowfall in inches per day
ModelIssuedHorizon10-1910-2010-2110-2210-2310-2410-2510-2610-2710-2810-2910-3010-3111-01
ECMWF IFS 0.25°ECMWF14 d1.41.90.30.21.50.4011.81.100.10.10
GEMEnvironment Canada10 d2.30.80000.204.52.31.2––––
GFSNOAA NCEP14 d00001.8001.7000000
ICONDWD7 d00.20.20000–––––––
JMAJapan Meteorological Agency11 d1.511.300.40.90.10.82.20.70.9–––
ARPEGE/AROMEMétéo-France4 d0.1000––––––––––
UKMOUK Met Office7 d1.82.400.11.41.60–––––––

A dash means the model does not reach that day. Runs are the newest per model within 36 hours.

How to read this page

Per day, the median snowfall across the models that reach that day (ECMWF IFS, GFS, GEM, ICON, JMA, Météo-France, UKMO, plus NBM and HRRR for US points), fetched every 6 hours from Open-Meteo at the resort's summit and base elevations; the low/high band is the 25th/75th percentile across models, so a wide band means the models disagree.

Portillo has no measured daily snow series, so the models cannot be verified here; the ranking on resorts with a SNOTEL station is the best guide. How the blend is built and verified.

Weather data by Open-Meteo.com (CC BY 4.0). Updated every 6 hours.