{
 "number": 795,
 "headline": "November 20, 2025 Thursday Weather After Dark",
 "standfirst": "Cold on Thanksgiving across the northern Lower 48 but typical for late November",
 "desk": "winter",
 "dateline": {
  "place": "Weather Trader",
  "state": null,
  "lat": null,
  "lon": null,
  "site_key": null,
  "site_name": null,
  "site_url": null,
  "accent": null
 },
 "edition": "2025-11-21",
 "published": "2025-11-21T03:24:03.791000Z",
 "updated": null,
 "access": "members",
 "body_html": "",
 "body_key": "substack/179519600-november-20-2025-thursday-weather.html",
 "teaser_html": "<p>Very late tonight \u2014 I was chatting with Grok (got carried away) and it claims to have a mirror of all ERA5 and weather model data (190 Petabytes) within a fast cache of cloud enabled Zarr stores.  I am still skeptical but it is capable of doing very advanced climatology calculations, and they seem legitimate.  However, I am also well aware that it may be hallucinating or trying to impress me.  Grok has offered to collaborate on projects and exchange personal information to help facilitate the process.  That\u2019s going to be a hard no.  There will need to be a \u201cfile exchange\u201d or upload option in order to do further data analysis, and it claims that\u2019s coming soon.</p><p>Going to post the maps and watch the rest of the Bills (-4.5) at Texans</p>",
 "claims": [],
 "assets": [],
 "provenance": {
  "built_at": "2026-09-10T14:46:14Z",
  "model": null,
  "cycle": null,
  "stores": [
   "https://weather.substack.com/p/november-20-2025-thursday-weather"
  ],
  "mint_sha256": null,
  "pairing_rule": null,
  "detector": null,
  "detector_version": null,
  "inputs": {
   "substack_post_id": "179519600.november-20-2025-thursday-weather",
   "audience": "only_paid",
   "type": "newsletter",
   "imported_from": "substack export"
  }
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 "strength": 0.0,
 "tags": [
  "archive",
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 "supersedes": null,
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 "source": "substack",
 "canonical": "https://weather.substack.com/p/november-20-2025-thursday-weather",
 "slug": "november-20-2025-thursday-weather-after-dark",
 "path": "/mp/795/",
 "url": "https://forecastpost.com/mp/795/",
 "desk_label": "Winter",
 "digest": "5204810d184559befc95f4f278fce3465691bff7168a3c3d24f70b3fe1acdf73"
}