SHADOW SEASON / D3 CONTEST RECEIPT

KATL · High ≥ 79°F

Atlanta, GA · 20260930 · 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 27 · 05:00 UTC
Observed day starts	Sep 30 · 05:00 UTC
Observed day ends	Oct 01 · 05:00 UTC
Unresolved contract voids	Oct 08 · 05:00 UTC

1991–2020 ACIS daily normal, rounded at publication. Source: exact KATL 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%

>99%

99%

98%

97%

81%

MODEL	PROBABILITY	INITIALIZED UTC	RECEIVED UTC	CAPTURED UTC
AIFS	97%	Sep 26 · 18:00 UTC	Sep 27 · 01:23 UTC	Sep 27 · 01:23 UTC
EPS	>99%	Sep 26 · 00:00 UTC	Sep 26 · 14:58 UTC	Sep 26 · 14:58 UTC
HRES	99%	Sep 26 · 12:00 UTC	Sep 26 · 19:24 UTC	Sep 26 · 19:24 UTC
ICON	98%	Sep 27 · 00:00 UTC	Sep 27 · 04:31 UTC	Sep 27 · 04:31 UTC
WN2	81%	Sep 26 · 12:00 UTC	Sep 26 · 23:03 UTC	Sep 26 · 23:03 UTC

Positions & reserved credits

YES MODEL	NO MODEL	QUANTITY	YES PRICE	YES RESERVED AT ENTRY	NO RESERVED AT ENTRY	YES / NO REALIZED P&L
AIFS	WN2	17	0.88985	15.13	1.87	+1.87 / -1.87

IFS HRES / IFS Ensemble: Gap below 4 percentage points.

The observation record

Finalized contract result: YES · 87°F · Oct 04 · 05:31 UTC

FIRST SEEN UTC	HIGH	SOURCE	OBSERVATION HOUR	TREATMENT
Oct 01 · 10:03 UTC	87°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:KATL:20260930:D3