The Spread

Was the forecast right for New Orleans on Tue Aug 18?

New Orleans, Louisiana · daily high temperature in °C · forecasts from each model's archived runs, verified against the ECMWF IFS analysis

13 days out, 4 models put New Orleans's Tue Aug 18 high anywhere from 32° to 36°; by the final call the field had settled to a median of 36°. The day verified at 35° against the ECMWF IFS analysis — cloudy.

AIGFS landed closest, off by 0.1°. AIFS ran 2° cold.

13 days out the models said 32–36; it hit 35. AIGFS led (off 0.1°C); AIFS ran 2°C cold.
The shareable card for this receipt — what this page looks like pasted into a thread.

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 New Orleans scoreboard shows them, labelled.

Lead AIFSAIGFSECMWFGEMGFSICONUKMO Range
15d · 2026-08-03 — 35° — — 35° — — 35–35°
14d · 2026-08-04 32° 36° — — 35° — — 32–36°
13d · 2026-08-05 32° 36° 32° — 35° — — 32–36°
12d · 2026-08-06 31° 37° 32° — 37° — — 31–37°
11d · 2026-08-07 33° 37° 32° — 38° — — 32–38°
10d · 2026-08-08 34° 36° 32° — 38° — — 32–38°
9d · 2026-08-09 33° 35° 32° — 39° — — 32–39°
8d · 2026-08-10 33° 36° 33° 36° 37° — — 33–37°
7d · 2026-08-11 33° 37° 34° 35° 37° — — 33–37°
6d · 2026-08-12 33° 37° 33° 36° 38° 36° — 33–38°
5d · 2026-08-13 34° 35° 34° 35° 37° 36° 35° 34–37°
4d · 2026-08-14 33° 35° 32° 35° 36° 36° 36° 32–36°
3d · 2026-08-15 33° 36° 33° 35° 37° 36° 36° 33–37°
2d · 2026-08-16 33° 35° 33° 36° 37° 35° 36° 33–37°
1d · 2026-08-17 33° 35° 33° 36° 37° 36° 36° 33–37°
0d · 2026-08-18 33° 35° 33° 37° 37° 36° 36° 33–37°
actual 35°

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 New Orleans — 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). Archive depth varies by city; receipts exist only for dates the archive watched arrive.