Was the forecast right for Dallas on Tue Aug 18?
Dallas, Texas · daily high temperature in °F · forecasts from each model's archived runs, verified against the ECMWF IFS analysis
14 days out, 4 models put Dallas's Tue Aug 18 high anywhere from 98° to 111°;by the final call, the day before, the field had settled to a median of 106°. The day verified at 106° against the ECMWF IFS analysis — clear.
ECMWF landed closest, off by 0.0°. GEM ran 3° cool.
What every model said, at every lead
Daily-high calls for Tue Aug 18 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 Dallas scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-08-03 | — | 99° | — | — | 108° | — | — | 99–108° |
| 14d · 2026-08-04 | 98° | 99° | 98° | — | 111° | — | — | 98–111° |
| 13d · 2026-08-05 | 103° | 102° | 102° | — | 110° | — | — | 102–110° |
| 12d · 2026-08-06 | 100° | 102° | 107° | — | 108° | — | — | 100–108° |
| 11d · 2026-08-07 | 105° | 100° | 106° | — | 106° | — | — | 100–106° |
| 10d · 2026-08-08 | 103° | 98° | 102° | — | 108° | — | — | 98–108° |
| 9d · 2026-08-09 | 103° | 102° | 106° | 100° | 107° | — | — | 100–107° |
| 8d · 2026-08-10 | 103° | 105° | 108° | 102° | 108° | — | — | 102–108° |
| 7d · 2026-08-11 | 104° | 105° | 107° | 101° | 111° | — | — | 101–111° |
| 6d · 2026-08-12 | 105° | 104° | 106° | 102° | 109° | 105° | 104° | 102–109° |
| 5d · 2026-08-13 | 104° | 105° | 109° | 103° | 108° | 108° | 104° | 103–109° |
| 4d · 2026-08-14 | 103° | 105° | 107° | 102° | 108° | 108° | 105° | 102–108° |
| 3d · 2026-08-15 | 103° | 105° | 108° | 102° | 108° | 107° | 106° | 102–108° |
| 2d · 2026-08-16 | 104° | 106° | 107° | 104° | 110° | 108° | 105° | 104–110° |
| 1d · 2026-08-17 | 104° | 106° | 106° | 103° | 106° | 108° | 106° | 103–108° |
| actual | 106° |
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 Dallas — 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.