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daily prop · Chicago, IL · Great Lakes & Upper Midwest · settles Sun Oct 18

Chicago high ≥ 66°F · Sun Oct 18

28¢
american +261 · decimal 3.61
on the tape
The line is the official NWS forecast at open. Settles on the ACIS official NWS daily record.
Canonical settlement condition: High ≥ 66°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¢10/0310/1410/18 18:00
— — 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
55¢
wn2
37¢
eps
36¢
icon
28¢
hres
19¢
nbm
13¢

The Ladder

where the whole distribution sits
56–57°F1¢
58–59°F5¢
60–61°F14¢
62–63°F25¢
64–65°F27¢
66–67°F18¢
68–69°F7¢
70–71°F2¢
calibration receipt: lead 3, scored on 14,153 settled station-days, consensus CRPS 1.905 vs climatology 8.883.

Receipts

prop id WP-KORD-20261018-TMAX-GE66 · opened 2026-10-13T15:41:27+00:00 · minted to the append-only hash-chained tape at open; the settle writes next to the mint · inspect the tape