SHADOW SEASON / D1 CONTEST RECEIPT

KBOS · High ≥ 75°F

Boston, MA · 20260911 · Settled

Simulation credits only. The probabilities below are locked entries; current forecasts cannot replace them.

The contract clock

MILESTONE	UTC
Published	Sep 08 · 15:49 UTC
Forecast deadline	Sep 10 · 05:00 UTC
Observed day starts	Sep 11 · 05:00 UTC
Observed day ends	Sep 12 · 05:00 UTC
Unresolved contract voids	Sep 19 · 05:00 UTC

1991–2020 ACIS daily normal, rounded at publication. Source: exact KBOS ACIS daily maximum. Observing window uses local standard time in America/New_York.

Scheduled opponents

AIFS Single versus WeatherNext 2

IFS HRES versus IFS Ensemble

Bye: ICON. An eligible bye forecast still contributes to the common-case skill table.

Locked forecasts

0% · NO50%YES · 100%

94%

86%

85%

52%

31%

MODEL	PROBABILITY	INITIALIZED UTC	RECEIVED UTC	CAPTURED UTC
AIFS	85%	Sep 09 · 18:00 UTC	Sep 10 · 01:29 UTC	Sep 10 · 01:39 UTC
EPS	94%	Sep 09 · 12:00 UTC	Sep 10 · 02:14 UTC	Sep 10 · 02:24 UTC
HRES	52%	Sep 09 · 12:00 UTC	Sep 09 · 19:36 UTC	Sep 09 · 19:39 UTC
ICON	31%	Sep 10 · 00:00 UTC	Sep 10 · 04:32 UTC	Sep 10 · 04:40 UTC
WN2	86%	Sep 09 · 12:00 UTC	Sep 09 · 23:10 UTC	Sep 09 · 23:24 UTC

Positions & reserved credits

YES MODEL	NO MODEL	QUANTITY	YES PRICE	YES RESERVED AT ENTRY	NO RESERVED AT ENTRY	YES / NO REALIZED P&L
EPS	HRES	45	0.73050	32.87	12.13	+12.13 / -12.13

AIFS Single / WeatherNext 2: Gap below 4 percentage points.

The observation record

Finalized contract result: YES · 79°F · Sep 15 · 05:38 UTC

FIRST SEEN UTC	HIGH	SOURCE	OBSERVATION HOUR	TREATMENT
Sep 12 · 09:59 UTC	79°F	RCC-ACIS StnData	24	Provisional reading

Inspect the evidence

Model versions and upstream calibration versions are unknown in this trial. The JSON contains the full frozen policy, entries, positions, and observation corrections.

Download this contest receipt (JSON) ↗

Contest ID: shadow-20260908-v1:KBOS:20260911:D1