[WIP] Add new website update entry for March 4, 2026

[Copilot]

• Create content/updates/2026-03-04.md with the required frontmatter and body content

Original prompt

Create a PR in dynamical-org/dynamical.org that adds a new website update entry for March 4, 2026.

Context

The site uses Eleventy. Updates are sourced from date-named Markdown files under content/updates/ and rendered by content/updates.njk via collections.updates | reverse.

Requirements

1. Add a new markdown file at:

   • content/updates/2026-03-04.md

2. The file must include YAML frontmatter with:

   • title: Ready: ASOS parquet, ICON-EU gribs, live GFS analysis, HRRR backfill
   • date: 2026-03-04

3. Body content should be formatted nicely in Markdown, based on the user-provided text, including:

   • A top-level section ## Ready
   • Subsections:
     • ### ASOS Parquet
     • ### DWD ICON-EU grib archive with:
       • Mention that DWD maintains a short rolling window of grib2 files
       • Mention archiving on Source Coop and include the URL: https://source.coop/dynamical/dwd-icon-grib
       • Include thanks to Jack Kelly of Open Climate Fix and the Patrick J McGovern Foundation
     • ### Live GFS analysis ✓ (GFS analysis dataset) with:
       • Notes: first live, hourly, global analysis
       • Mention noaa-gfs-forecast-hourly deprecated and replaced with noaa-gfs-analysis
       • Bullet list:
         • Live! (not static)
         • 21 variables (vs 4)
         • Available in Zarr v3 and Icechunk
       • Include the catalog URL on its own line: https://dynamical.org/catalog/noaa-gfs-analysis/
     • ### HRRR analysis back to 2014 with:
       • Text: four sweet more years (was 2018)
     • ### Icechunk note with:
       • Keep the placeholder <DATE> as-is (user has not provided the cutoff date yet):
         • Switch to v0.2.0 — we'll be stopping updating v0.1.0 on <DATE>.

4. Ensure the new update shows up on /updates by following existing conventions in content/updates/*.md.

Notes

• Do not change any templates unless required; this should be a content-only change.
• Keep style consistent with existing updates entries (frontmatter + markdown headings).

This pull request was created from Copilot chat.

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