WEATHER PROPSBOARDMATCHUPSMODELSSTATIONSREPLAYTHE LEAGUE
daily prop · Chicago, IL · Great Lakes & Upper Midwest · settles Tue Oct 20

Chicago high ≥ 71°F · Tue Oct 20

23¢
american +336 · decimal 4.36
on the tape
The line is the official NWS forecast at open. Settles on the ACIS official NWS daily record.
Canonical settlement condition: High ≥ 71°F. The original listing above is retained as published. Open the model matchup dashboard →

The Tape

what the models knew, when
0¢25¢50¢75¢100¢10/0510/1510/19 06:00
— — reconstructed from archived model runs (deterministic values + a lead-dependent Gaussian error model, labeled, never on the tape) · — live prices from the running consensus engine.

Who's Bullish

each model's own price
ndfd
55¢
aifs
52¢
wn2
40¢
nbm
25¢
eps
15¢
hres
12¢
icon
8¢

The Ladder

where the whole distribution sits
60–61°F1¢
62–63°F4¢
64–65°F14¢
66–67°F28¢
68–69°F30¢
70–71°F17¢
72–73°F5¢
74–75°F1¢
calibration receipt: lead 1, scored on 14,459 settled station-days, consensus CRPS 1.516 vs climatology 8.861.

Receipts

prop id WP-KORD-20261020-TMAX-GE71 · opened 2026-10-14T03:45:29+00:00 · minted to the append-only hash-chained tape at open; the settle writes next to the mint · inspect the tape