Was the forecast right for Charlotte on Tue Aug 4?
Charlotte, North Carolina · daily high temperature in °F · forecasts from each model's archived runs, verified against the ECMWF IFS analysis
10 days out, 4 models put Charlotte's Tue Aug 4 high anywhere from 78° to 90°;by the final call, the day before, the field had settled to a median of 81°. The day verified at 81° against the ECMWF IFS analysis, with 0.33 in of precipitation — rain.
AIFS landed closest, off by 0.1°. UKMO ran 2° warm.
What every model said, at every lead
Daily-high calls for Tue Aug 4 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 Charlotte scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 10d · 2026-07-25 | 85° | 78° | 83° | — | 90° | — | — | 78–90° |
| 9d · 2026-07-26 | 88° | 80° | 84° | 86° | 92° | — | — | 80–92° |
| 8d · 2026-07-27 | 86° | 89° | 86° | 86° | 95° | — | — | 86–95° |
| 7d · 2026-07-28 | 84° | 88° | 86° | 88° | 97° | — | — | 84–97° |
| 6d · 2026-07-29 | 80° | 83° | 84° | 85° | 83° | 81° | 86° | 80–86° |
| 5d · 2026-07-30 | 88° | 81° | 88° | 80° | 84° | 85° | 91° | 80–91° |
| 4d · 2026-07-31 | 85° | 87° | 86° | 85° | 90° | 80° | 91° | 80–91° |
| 3d · 2026-08-01 | 84° | 88° | 85° | 81° | 88° | 86° | 89° | 81–89° |
| 2d · 2026-08-02 | 82° | 86° | 81° | 84° | 84° | 86° | 89° | 81–89° |
| 1d · 2026-08-03 | 81° | 81° | 79° | 81° | 81° | 80° | 84° | 79–84° |
| actual | 81° |
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 Charlotte — 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.