{ "number": 1069, "headline": "The ledger, through September 13", "standfirst": "Mean absolute temperature error runs 2.23\u00b0F at day 1 and 3.51\u00b0F at day 7, over 380,314 settled forecast-observation pairs.", "desk": "ledger", "dateline": { "place": "The Ledger", "state": null, "lat": null, "lon": null, "site_key": null, "site_name": null, "site_url": null, "accent": null }, "edition": "2026-09-13", "published": "2026-09-13T00:25:10Z", "updated": null, "access": "free", "body_html": "

Every forecast this network publishes for a station with an ASOS report is compared against that report once the valid time has passed, and the residual is written down. This is the standing table for August 14\u2013September 13, 2026.

LeadNDFDNBMpairs
Day 12.282.2359,611
Day 22.472.4357,354
Day 32.702.6254,930
Day 42.892.8052,500
Day 53.133.0250,105
Day 63.393.2747,694
Day 73.693.5136,824
Day 8\u20143.8121,296

Mean absolute error, \u00b0F, temperature. ASOS reports at :53 and the forecast is stamped on the hour, so a forecast is paired with the nearest observation within 30 minutes and otherwise left unscored.

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