Minneapolis, Minnesota Revisions
MILEPOST 1170
Minneapolis's forecast for Saturday has moved 9°F colder
72°F in the 20260919T18:00Z run, 63°F in the 20260921T12:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 10°F.
Successive cycles do not merely refresh a forecast; they leave a trail. For Saturday, September 26 at 21Z in Minneapolis, that trail runs from 72.1°F in the 20260919T18:00Z cycle to 63.3°F in the 20260921T12:00Z — a move of -8.8°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 Saturday at 21Z api.weather.city /v1/history (nbm-qmd) |
-8.8 °F | normal 0.0 °F · 1 of 5 8 synoptic cycles |
| 10th-to-90th percentile spread at that hour api.weather.city (nbm-qmd) |
10 °F | normal 8.8 °F current run |
- Milepost
- 1170 · laid 2026-09-21T22:25:13Z
- Model
- nbm-qmd · cycle 20260921T12:00Z
- 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
- 2d16ec3d68a0fa83778ce967b3ee4273167056c179fa1f66930eace53907773a
- Machine
- JSON