Was the forecast right for Salt Lake City on Wed Aug 5?
Salt Lake City, Utah · daily high temperature in °F · forecasts from each model's archived runs, verified against the ECMWF IFS analysis
14 days out, 4 models put Salt Lake City's Wed Aug 5 high anywhere from 89° to 106°;by the final call, the day before, the field had settled to a median of 92°. The day verified at 95° against the ECMWF IFS analysis — partly cloudy.
GFS landed closest, off by 0.1°. AIGFS ran 4° cool.
What every model said, at every lead
Daily-high calls for Wed Aug 5 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 |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-07-21 | 99° | 99° | — | — | 105° | — | — | 99–105° |
| 14d · 2026-07-22 | 93° | 89° | 106° | — | 105° | — | — | 89–106° |
| 13d · 2026-07-23 | 95° | 94° | 103° | — | 105° | — | — | 94–105° |
| 12d · 2026-07-24 | 96° | 102° | 102° | — | 109° | — | — | 96–109° |
| 11d · 2026-07-25 | 98° | 101° | 104° | — | 104° | — | — | 98–104° |
| 10d · 2026-07-26 | 95° | 100° | 104° | — | 100° | — | — | 95–104° |
| 9d · 2026-07-27 | 98° | 98° | 103° | 99° | 106° | — | — | 98–106° |
| 8d · 2026-07-28 | 100° | 91° | 106° | 98° | 101° | — | — | 91–106° |
| 7d · 2026-07-29 | 95° | 90° | 101° | 93° | 95° | 97° | — | 90–101° |
| 6d · 2026-07-30 | 92° | 88° | 102° | 91° | 91° | 92° | 98° | 88–102° |
| 5d · 2026-07-31 | 89° | 89° | 96° | 89° | 97° | 96° | 101° | 89–101° |
| 4d · 2026-08-01 | 91° | 89° | 97° | 89° | 97° | 92° | 93° | 89–97° |
| 3d · 2026-08-02 | 93° | 90° | 95° | 91° | 96° | 92° | 92° | 90–96° |
| 2d · 2026-08-03 | 92° | 91° | 94° | 90° | 95° | 91° | 92° | 90–95° |
| 1d · 2026-08-04 | 92° | 91° | 94° | 92° | 95° | 91° | 92° | 91–95° |
| actual | 95° |
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 the ECMWF IFS analysis (temperature_2m_max). The actual values are the ones in hand when this receipt was settled, usually 2 days after the date; a correction published after that is not carried into it. Archive depth varies by city; receipts exist only for dates the archive watched arrive.