Boston, Massachusetts Revisions
MILEPOST 1347
Boston's forecast for Wednesday has moved 11°F warmer
58°F in the 20261008T12:00Z run, 69°F in the 20261010T06:00Z — the 2nd-largest revision of the 7 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 18°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Wednesday, October 14 at 18Z in Boston, that trail runs from 58.0°F in the 20261008T12:00Z cycle to 68.6°F in the 20261010T06:00Z — a move of +10.6°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 Wednesday at 18Z api.weather.city /v1/history (nbm-qmd) |
10.6 °F | normal 0.0 °F · 2 of 7 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
18.4 °F | normal 10.6 °F current run |
- Milepost
- 1347 · laid 2026-10-10T16:25:15Z
- Model
- nbm-qmd · cycle 20261010T06:00Z
- 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
- 5fc864fe1c24b505f3d71a8c0ba6b64ca870ce9f1c6bb1ab8be0dc52104d1d04
- Machine
- JSON