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daily prop · Chicago, IL · Great Lakes & Upper Midwest · settles Fri Oct 23

Chicago high ≥ 75°F · Fri Oct 23

18¢
american +471 · decimal 5.71
on the tape
The line is the official NWS forecast at open. Settles on the ACIS official NWS daily record.
Canonical settlement condition: High ≥ 75°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¢10/0810/1610/19 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
53¢
aifs
43¢
nbm
29¢
wn2
24¢
hres
9¢
eps
6¢
icon
5¢

The Ladder

where the whole distribution sits
60–61°F1¢
62–63°F3¢
64–65°F8¢
66–67°F15¢
68–69°F21¢
70–71°F22¢
72–73°F16¢
74–75°F9¢
76–77°F3¢
78–79°F1¢
calibration receipt: lead 4, scored on 14,312 settled station-days, consensus CRPS 2.165 vs climatology 8.861.

Receipts

prop id WP-KORD-20261023-TMAX-GE75 · opened 2026-10-17T15:24:39+00:00 · minted to the append-only hash-chained tape at open; the settle writes next to the mint · inspect the tape