Was the forecast right for Tampa on Mon Sep 21?
Tampa, Florida · daily high temperature in °F · forecasts from each model's archived runs, verified against the TPA observations
14 days out, 4 models put Tampa's Mon Sep 21 high anywhere from 85° to 94°;by the final call, the day before, the field had settled to a median of 90°. The day verified at 89° against the TPA observations, with 0.08 in of precipitation — thunderstorms.
AIFS landed closest, off by 0.7°. GFS ran 3° warm.
What every model said, at every lead
Daily-high calls for Mon Sep 21 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 |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-09-06 | — | 92° | — | — | 90° | — | — | 90–92° |
| 14d · 2026-09-07 | 85° | 89° | 89° | — | 94° | — | — | 85–94° |
| 13d · 2026-09-08 | 86° | 90° | 89° | — | 93° | — | — | 86–93° |
| 12d · 2026-09-09 | 86° | 78° | 84° | — | 88° | — | — | 78–88° |
| 11d · 2026-09-10 | 90° | 88° | 84° | — | 93° | — | — | 84–93° |
| 10d · 2026-09-11 | 86° | 91° | 91° | — | 92° | — | — | 86–92° |
| 9d · 2026-09-12 | 86° | 87° | 84° | 87° | 92° | — | — | 84–92° |
| 8d · 2026-09-13 | 89° | 89° | 91° | 91° | 92° | — | — | 89–92° |
| 7d · 2026-09-14 | 86° | 91° | 88° | 90° | 92° | — | — | 86–92° |
| 6d · 2026-09-15 | 85° | 90° | 85° | 89° | 92° | 91° | 90° | 85–92° |
| 5d · 2026-09-16 | 87° | 90° | 85° | 87° | 92° | 90° | 91° | 85–92° |
| 4d · 2026-09-17 | 88° | 89° | 85° | 88° | 93° | 90° | 87° | 85–93° |
| 3d · 2026-09-18 | 86° | 90° | 86° | 86° | 92° | 89° | 84° | 84–92° |
| 2d · 2026-09-19 | 88° | 90° | 87° | 90° | 93° | 90° | 88° | 87–93° |
| 1d · 2026-09-20 | 88° | 90° | 87° | 90° | 92° | 91° | 87° | 87–92° |
| actual | 89° |
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. Archive depth varies by city; receipts exist only for dates the archive watched arrive.