Was the forecast right for Salt Lake City on Sun Aug 2?
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 Sun Aug 2 high anywhere from 99° to 101°;by the final call, the day before, the field had settled to a median of 99°. The day verified at 101° against the ECMWF IFS analysis — cloudy.
GFS landed closest, off by 0.0°. AIGFS ran 3° cool.
What every model said, at every lead
Daily-high calls for Sun Aug 2 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 · 2026-07-18 | 97° | 94° | — | — | 104° | — | — | 94–104° |
| 14d · 2026-07-19 | 99° | 99° | 99° | — | 101° | — | — | 99–101° |
| 13d · 2026-07-20 | 96° | 88° | 102° | — | 102° | — | — | 88–102° |
| 12d · 2026-07-21 | 99° | 101° | 103° | — | 100° | — | — | 99–103° |
| 11d · 2026-07-22 | 99° | 96° | 106° | — | 95° | — | — | 95–106° |
| 10d · 2026-07-23 | 99° | 97° | 106° | — | 106° | — | — | 97–106° |
| 9d · 2026-07-24 | 101° | 98° | 104° | 98° | 104° | — | — | 98–104° |
| 8d · 2026-07-25 | 99° | 100° | 103° | 95° | 101° | — | — | 95–103° |
| 7d · 2026-07-26 | 99° | 101° | 101° | 98° | 108° | 100° | — | 98–108° |
| 6d · 2026-07-27 | 98° | 100° | 102° | 96° | 104° | 97° | 103° | 96–104° |
| 5d · 2026-07-28 | 98° | 100° | 98° | 96° | 104° | 97° | 100° | 96–104° |
| 4d · 2026-07-29 | 100° | 100° | 102° | 97° | 104° | 99° | 103° | 97–104° |
| 3d · 2026-07-30 | 99° | 99° | 101° | 97° | 104° | 99° | 101° | 97–104° |
| 2d · 2026-07-31 | 99° | 99° | 102° | 97° | 100° | 98° | 99° | 97–102° |
| 1d · 2026-08-01 | 99° | 98° | 100° | 98° | 101° | 99° | 100° | 98–101° |
| actual | 101° |
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.