Boston, Massachusetts Revisions
MILEPOST 1608
Boston's forecast for Friday has moved 11°F warmer
34°F in the 20261106T12:00Z run, 45°F in the 20261108T06:00Z — the 2nd-largest revision of the 8 cities on the roster that moved at all. The current run's 10th-to-90th percentile spread at that hour is 13°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Friday, November 13 at 09Z in Boston, that trail runs from 33.7°F in the 20261106T12:00Z cycle to 44.9°F in the 20261108T06:00Z — a move of +11.2°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 Friday at 09Z api.weather.city /v1/history (nbm-qmd) |
11.2 °F | normal 0.0 °F · 2 of 8 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
13.3 °F | normal 11.2 °F current run |
- Milepost
- 1608 · laid 2026-11-08T16:25:26Z
- Model
- nbm-qmd · cycle 20261108T06:00Z
- 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
- 82e85090d3e7a048e28dd24c1f2511a87cc450d51accd19d942b55f35ea783ce
- Machine
- JSON