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

Chicago high ≥ 70°F · Tue Oct 20

61¢
american -156 · decimal 1.64
on the tape
The line is the official NWS forecast at open. Settles on the ACIS official NWS daily record.
Canonical settlement condition: High ≥ 70°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¢10/0510/1310/19 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
aifs
86¢
wn2
72¢
nbm
55¢
eps
49¢
hres
48¢
icon
29¢

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-GE70 · opened 2026-10-13T08:03:27+00:00 · minted to the append-only hash-chained tape at open; the settle writes next to the mint · inspect the tape