A chronicle of American weather and climate · Wednesday, 16 September 2026
Across Colorado, Idaho, Michigan, Montana and 4 more, the highest readings in each county's series since 1951. The warmest was Prairie, Montana, at 112.9°F.
A day-8 forecast of 92.2°F for September 1 at 00Z; the station reported 62.6°F. It is the largest temperature residual in the ledger over the last 30 days.
69°F in the 20260912T18:00Z run, 86°F in the 20260914T12:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 19°F.
68°F in the 20260909T18:00Z run, 85°F in the 20260911T12:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 13°F.
Across Colorado, Kansas, Nebraska, Wyoming, the highest readings in each county's series since 1951. The warmest was Wallace, Kansas, at 110.0°F.
85°F in the 20260909T18:00Z run, 69°F in the 20260911T12:00Z — 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 7°F.
MP 1056 · Revisions · Chicago
63°F in the 20260908T18:00Z run, 78°F in the 20260910T12:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 22°F.
MP 1044 · Revisions · Salt Lake City
70°F in the 20260912T06:00Z run, 84°F in the 20260914T00:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 20°F.
MP 1080 · Revisions · Kansas City
71°F in the 20260912T12:00Z run, 85°F in the 20260914T06:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 19°F.
MP 1084 · Revisions · Kansas City
83°F in the 20260909T00:00Z run, 69°F in the 20260910T18:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 20°F.
MP 1049 · Revisions · Chicago
99°F in the 20260913T12:00Z run, 85°F in the 20260915T06:00Z — the largest revision of any city on the roster. The current run's 10th-to-90th percentile spread at that hour is 15°F.
MP 1094 · Revisions · Phoenix
Every forecast the network publishes for a station with an hourly report is compared against it once the valid time passes. The residuals are kept even though the grids are not.
Every dateline above is a bureau. The colour on it is that site's own accent in the network's Interstate sign system — 45 sites, each with a colour, and this one with none.