Snowmaking Forecast — Next 24h
Lowest Forecast Wet Bulb
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Awaiting data
Best 3-Hour Window
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Based on lowest avg wet-bulb period
First Likely Start Hour
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Triggered below -1.6°C wet bulb
Confidence Level
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Assessed from model spread
Models:
BOM ACCESS-G
NOAA GFS
MeteoFrance
DWD ICON
ECMWF IFS
Env. Canada GEM
JMA GSM
KMA GDPS
CMA GRAPES
UKMO Global
Open-Meteo Best
Sites:
Selwyn
Kiandra
Cabramurra
Loading data streams…
| Time | Air Temp | RH | Wet Bulb | Model Spread (WB min→max) |
Wind Dir | Wind Speed | Precip | Source | Snowmaking Suitability |
|---|---|---|---|---|---|---|---|---|---|
| Loading forecast data… | |||||||||
Wet Bulb Guide:
No snowmaking: ≥ -1.6°C
Marginal: < -1.6 to -2.0°C
Good: < -2.0 to -3.0°C
Excellent: < -3.0°C
ATASS / Meteo Station — Per-Hour Entry
Enter recorded actuals from ATASS or on-hill Meteo stations for any hours you have data.
Fill as many or as few hours as you like — the rest use raw model output.
Hit Save to Google Sheets and the data persists across all devices and sessions, accumulating over the season to tune the model.
Checking for saved data…
| Hour | GU10 Pit 205 Air Temp (°C) |
GU10 Pit 205 Humidity (%) |
GU10 Pit 205 Wet Bulb (°C) optional — auto-calcs from T+RH |
Model WB | ΔWB (actual − model) | Status |
|---|---|---|---|---|---|---|
| Waiting for forecast data… | ||||||
No corrections entered.
Modified this session
Saved to Sheets
Raw model — no data
Tip: only T + RH needed — WB is auto-calculated
ATASS Export Upload
Upload your ATASS export (.xls, .xlsx, or .csv). Map the columns once, preview the data, then save directly to Google Sheets. Supports partial windows — only hours that fall within the current 24-hour forecast window (noon → noon) are imported.
Click to browse or drag & drop
Accepts .xls · .xlsx · .csv — ATASS export
Accepts .xls · .xlsx · .csv — ATASS export
All recorded windows live in your Google Sheet. The bias profile below shows the average model error (ΔWB) per hour-of-window across all recorded windows — your systematic bias fingerprint for Selwyn. The more windows you record, the tighter this gets.
Click the Bias History tab to load…
Windy.com — meteoblue model · Selwyn region
Windy.com — meteoblue point forecast · Selwyn Snow Resort