Was the forecast right for Tampa on Sun Sep 6?
Tampa, Florida · daily high temperature in °F · forecasts from each model's archived runs, verified against the TPA observations
12 days out, 4 models put Tampa's Sun Sep 6 high anywhere from 89° to 96°;by the final call, the day before, the field had settled to a median of 92°. The day verified at 90° against the TPA observations — thunderstorms.
AIFS landed closest, off by 0.0°. GEM ran 4° warm.
What every model said, at every lead
Daily-high calls for Sun Sep 6 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 Tampa scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 12d · 2026-08-25 | 91° | 90° | 89° | — | 96° | — | — | 89–96° |
| 11d · 2026-08-26 | 91° | 92° | 88° | — | 95° | — | — | 88–95° |
| 10d · 2026-08-27 | 83° | 92° | 86° | — | 97° | — | — | 83–97° |
| 9d · 2026-08-28 | 82° | 83° | 88° | 90° | 94° | — | — | 82–94° |
| 8d · 2026-08-29 | 84° | 86° | 89° | 91° | 92° | — | — | 84–92° |
| 7d · 2026-08-30 | 86° | 92° | 88° | 80° | 95° | — | — | 80–95° |
| 6d · 2026-08-31 | 85° | 90° | 88° | 89° | 93° | 91° | 91° | 85–93° |
| 5d · 2026-09-01 | 87° | 89° | 84° | 91° | 90° | 90° | 90° | 84–91° |
| 4d · 2026-09-02 | 87° | 87° | 89° | 90° | 93° | 93° | 89° | 87–93° |
| 3d · 2026-09-03 | 89° | 91° | 89° | 94° | 93° | 92° | 92° | 89–94° |
| 2d · 2026-09-04 | 90° | 91° | 90° | 93° | 94° | 91° | 91° | 90–94° |
| 1d · 2026-09-05 | 90° | 90° | 89° | 94° | 94° | 92° | 93° | 89–94° |
| actual | 90° |
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 Tampa — 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 TPA observations. 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.