9 June 2021, 00:00 UTC to
10 June 2021, 01:00 UTC
· 25 contiguous hourly fields
Liquid equivalent, not a depth chart.This is accumulated snowfall water equivalent (mm SWE), not snow depth. The DEM supplies masks, outlines and area summaries only. It does not downscale, interpolate or adjust BARRA weather to 1500 m or any elevation.
1 · Weather field
Native BARRA-R2 event grid
Every rectangle is one unchanged native BARRA-R2 cell. Resort dots are geographic references only.
Accumulated SWE (mm)
0–11–55–1010–2020–3030–4040+Missing
2 · Separate terrain context
Thredbo DEM tile elevation mask
The inset changes only the terrain selection and its area summary. The weather map above never changes.
Inclusive mask: elevation ≥ selected threshold. Native 1-arcsecond DEM pixels; no smoothing or resampling.
Selected terrain
302.5 km²
BARRA coverage
100.0%
Missing BARRA area
0 km²
Area-weighted native SWE
23.9 mm SWE
Maximum native-cell SWE
31.8 mm SWE
Available native cells
8
Threshold means are renormalized over selected terrain with available native BARRA SWE; inspect coverage and missing area with every result.
3 · Provenance and limits
What was joined—and what was not
Weather stays native
The 25 hourly BARRA-R2 snowfall-flux fields were converted to liquid-equivalent
millimetres and summed cell by cell. Missing values propagate strictly. Grid centres,
ordering and values are retained; cell edges are midpoint-derived for display.
Terrain is an overlay and denominator
Native one-arcsecond DEM pixel rectangles are clipped against BARRA cell bounds and
measured geodesically. The DEM supplies the inset and area weights—it never creates a
higher-resolution weather field.
No 1500 m weather claim
Selecting 1500 m means “terrain at or above 1500 m” inside this one Thredbo context
tile. It does not mean snow at 1500 m, and it does not modify BARRA using altitude.
Weather:
BoM BARRA-R2 via NCI
(Creative Commons Attribution 4.0 International). Terrain:
Geoscience Australia 1 Second DEM
(Creative Commons Attribution 4.0 International). Map lines: Natural Earth, public domain.