Was the forecast right for Salt Lake City on Wed Jul 29?
Salt Lake City, Utah · daily high temperature · forecasts from each model's archived runs, verified against ERA5
12 days out, 4 models put Salt Lake City's Wed Jul 29 high anywhere from 94° to 107°; by the final call the field had settled to a median of 91°. ERA5 says the day verified at 93° with 0.04 in of precipitation — drizzle.
UKMO landed closest, off by 0.1°. AIFS ran 7° cold.
What every model said, at every lead
Daily-high calls for Wed Jul 29 as each model's runs approached it — the last archived run per day. NBM and The Spread's own blend are consensus products and stay out of these ranges and rankings; the Salt Lake City scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 12d · 2026-07-17 | 96° | 94° | 98° | — | 107° | — | — | 94–107° |
| 11d · 2026-07-18 | 96° | 100° | 102° | — | 103° | — | — | 96–103° |
| 10d · 2026-07-19 | 89° | 98° | 103° | — | 108° | — | — | 89–108° |
| 9d · 2026-07-20 | 90° | 101° | 102° | 96° | 102° | — | — | 90–102° |
| 8d · 2026-07-21 | 94° | 97° | 98° | 98° | 99° | — | — | 94–99° |
| 7d · 2026-07-22 | 93° | 99° | 100° | 96° | 99° | — | — | 93–100° |
| 6d · 2026-07-23 | 97° | 97° | 94° | 98° | 105° | 92° | 96° | 92–105° |
| 5d · 2026-07-24 | 97° | 98° | 100° | 96° | 103° | 96° | 96° | 96–103° |
| 4d · 2026-07-25 | 97° | 97° | 99° | 97° | 100° | 100° | 98° | 97–100° |
| 3d · 2026-07-26 | 92° | 95° | 98° | 99° | 97° | 98° | 99° | 92–99° |
| 2d · 2026-07-27 | 91° | 96° | 95° | 98° | 97° | 99° | 96° | 91–99° |
| 1d · 2026-07-28 | 88° | 93° | 90° | 91° | 97° | 90° | 89° | 88–97° |
| 0d · 2026-07-29 | 85° | 90° | 89° | 91° | 94° | 92° | 93° | 85–94° |
| actual | 93° |
Read it honestly
This is one date, not a league table. A model can win a day it deserved to lose; rankings only mean something over a window. For that, see which model has been most accurate in Salt Lake City — or every city The Spread scores.
Forecasts are what each model's archived runs said at the time, captured at The Spread's sweep times — never reconstructed after the fact. Truth is ERA5 reanalysis (temperature_2m_max). Archive depth varies by city; receipts exist only for dates the archive watched arrive.