Adds mix hrdps.probe — throwaway wedge that retires URL/projection/decode
risks against MSC Datamart. Verified against five Canadian cities with
plausible 2m temperatures via wgrib2's native rotated-lat/lon support.
Findings update what we knew:
- ECCC reorganized to date-prefixed paths; the old /model_hrdps/ root
404s now. Real URL is dd.weather.gc.ca/{YYYYMMDD}/WXO-DD/model_hrdps/...
- HRDPS publishes one variable per GRIB2 file (~3.5 MB each), not
HRRR's bundled wrfsfcf format. ~14 files per cycle/forecast hour.
- wgrib2 -lon LON LAT handles the rotated grid natively — no manual
reprojection math needed.
New plan at 2026-04-29-hrdps-canadian-prop-grid.md supersedes the
2026-04-13 one (which assumed HRRR-style idx + byte-range fetches that
don't apply). Probe deletion is a Stage 10 step in the new plan.
IEM's RAOB endpoint stopped keeping Canadian stations current — most
stalled around Sep 2024 — which leaves a gap in refractivity/ducting
calibration over all the CW*/CY* stations already in weather_stations.
MSC's own tephi CSV is fixed-width and rendering-focused; the WMO TEMP
bulletins would need a full decoder. University of Wyoming serves the
same stations in a clean space-delimited format, is current, and
accepts the 3-letter station code (drop the leading C from Canadian
ICAO). Its output shape matches IemClient.parse_raob_json/1 exactly,
so it drops straight into Weather.upsert_sounding/2.
- New UwyoSoundingClient with URL builder, Req-based fetch_sounding,
and a fixed-width parse_sounding_html that extracts PRES/HGHT/TEMP/
DWPT/DRCT/SKNT from the <PRE> block and DateTime from the <H2> header.
- New CanadianSoundingFetchWorker: Oban batch worker that finds all
sounding stations whose code starts with C, picks the most recently
publishable 00Z or 12Z slot (90 min publish delay), calls UWYO per
station, and upserts with SoundingParams-derived refractivity/
ducting fields.
- Oban cron at 01:30Z and 13:30Z (dev + prod) to drive the worker.
- Req.Test plug wiring in config/test.exs.
- Captured Goose Bay fixture as test/support/fixtures/uwyo_sounding_yyr.html.
Also drops two implementation plans under docs/plans/:
- 2026-04-13-rdps-vertical-profiles.md: ~2 day plan for RDPS 10 km
Canadian ducting outside HRRR's Lambert footprint.
- 2026-04-13-hrdps-canadian-prop-grid.md: ~5 day plan for the full
HRDPS 2.5 km Canadian prop grid. Explicitly recommends doing RDPS
first.
TDD throughout, 19 new tests, 1318/1318 passing, credo strict clean.
