Boston, Massachusetts Revisions
MILEPOST 1463
Boston's forecast for Thursday has moved 8°F warmer
36°F in the 20261020T06:00Z run, 45°F in the 20261022T00:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 16°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Thursday, October 29 at 12Z in Boston, that trail runs from 36.4°F in the 20261020T06:00Z cycle to 44.9°F in the 20261022T00:00Z — a move of +8.5°F across 8 runs.
The change is about half the run's 10th-to-90th percentile spread, so the earlier forecast is still inside the current range of outcomes.
Model NBM-QMD, via api.weather.city /v1/history. Percentiles are the same run's own.
The numbers in this piece, with what they are measured against
| forecast revision for Thursday at 12Z api.weather.city /v1/history (nbm-qmd) |
8.5 °F | normal 0.0 °F · 1 of 4 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
16.4 °F | normal 8.5 °F current run |
- Milepost
- 1463 · laid 2026-10-22T10:25:19Z
- Model
- nbm-qmd · cycle 20261022T00:00Z
- Desk
- revision v1
- Method
- the same valid time read from successive synoptic cycles; the move is last run minus first run
- Source
- https://api.weather.city/v1/history
- Digest
- 58be4762c0125398db6492fe1b52f084762409a2c0ff8a03b7daf15d598044c2
- Machine
- JSON