ArWen 3.0.1

ArWen 3.0.1. The desktop stays ArWen Desktop 1.0.10, from the 2.9.0 release.

• Install or upgrade: pip install --upgrade "gpuwm[all-cu12]==3.0.1".
• Integration kit, verification records, and checksums.
• Node GPU gate: Stage 1 and both GPU-shard results, with the tested source revision and card identity.

New

• Opt-in ocean waves (--waves on) now also run on large lakes (5,000 km² or more). Depths come from ETOPO 2022 (the model's lake surface minus the lake bed); a lake starts calm and its waves grow from the forecast's own wind, so no outside wave model is needed. Checked on one case: a Lake Superior gale on 5 November 2026, ArWen at 12 km for 9 hours, wave height compared at three NDBC buoys. Lake ice is checked by a unit test only; lakes are not validated against a season of buoy observations, and nests carry no waves.

Fixed

• gpuwm go --waves on from a pip install fetches the wave data bridge (rw_waves_data) from the release bundle on first use; it stopped with "rw_waves_data is required" unless gpuwm fetch-bridges had been run first.
• The wave bathymetry download fetches a range again when the server ends it early; a single short range stopped the first --waves on run with "bathymetry acquisition incomplete".