KDCA / Tue Oct 20 / OFFICIAL STATION RECORD

Washington, DCHigh ≥ 78°F

CONSENSUS FORECAST2%Oct 17 · 06:58 UTC

THE FORECAST FIELD

Who takes which side?

0% · NO50%YES · 100%

42%

34%

13%

<1%

Consensus

Probabilities derived from each source’s mean and spread. Forecasts may have different initialization times.

HOW A MODEL CONTRACT WORKS

Head-to-head preview

ILLUSTRATIVE · NOT EXECUTED

WN2YES 21.4¢Risks 21.40u

EPSNO 78.6¢Risks 78.60u

100 contracts at the midpoint of these model probabilities. Each contract pays 1u to the winning side.

WN2 +78.60u · EPS −78.60u

These are current forecast comparisons, not locked entries. No credits have been committed. Read the proposed policy →

FOLLOW THE RUNS

Probability history

Recorded Reconstructed

Reconstructed from archived summary forecasts using a shared lead-dependent Gaussian error model. Times are initializations, not verified release times.

AIFS SingleICONGFSUKMETGEMIFS archive

Inspect a forecast 2026-10-20T06:00:00+00:00 · UTC

View the forecast data

UTC	AIFS	ICON	GFS	UKMET	GEM	IFS*
2026-10-05T06:00:00+00:00	9.3%	—	—	—	—	—
2026-10-05T12:00:00+00:00	0.0%	—	—	—	—	0.3%
2026-10-05T18:00:00+00:00	3.7%	—	—	—	—	—
2026-10-06T00:00:00+00:00	6.3%	—	—	—	—	9.6%
2026-10-06T06:00:00+00:00	14.3%	—	—	—	—	—
2026-10-06T12:00:00+00:00	17.2%	—	—	—	—	5.9%
2026-10-06T18:00:00+00:00	44.7%	—	—	—	—	—
2026-10-07T00:00:00+00:00	1.0%	—	—	—	—	5.5%
2026-10-07T06:00:00+00:00	34.5%	—	—	—	—	—
2026-10-07T12:00:00+00:00	12.8%	—	—	—	—	6.3%
2026-10-07T18:00:00+00:00	42.1%	—	—	—	—	—
2026-10-08T00:00:00+00:00	54.2%	—	—	—	—	4.5%
2026-10-08T06:00:00+00:00	1.9%	—	—	—	—	—
2026-10-08T12:00:00+00:00	26.5%	—	—	—	—	6.3%
2026-10-08T18:00:00+00:00	1.0%	—	—	—	—	—
2026-10-09T00:00:00+00:00	2.8%	—	—	—	—	7.3%
2026-10-09T06:00:00+00:00	0.7%	—	—	—	—	—
2026-10-09T12:00:00+00:00	0.7%	—	—	—	—	10.4%
2026-10-09T18:00:00+00:00	17.4%	—	—	—	—	—
2026-10-10T00:00:00+00:00	11.0%	—	—	—	—	13.2%
2026-10-10T06:00:00+00:00	7.4%	—	—	—	—	—
2026-10-10T12:00:00+00:00	33.0%	—	—	—	—	16.3%
2026-10-10T18:00:00+00:00	23.5%	—	0.0%	—	—	—
2026-10-11T00:00:00+00:00	24.0%	—	—	—	—	9.8%
2026-10-11T06:00:00+00:00	15.8%	—	3.3%	—	—	—
2026-10-11T12:00:00+00:00	31.9%	—	—	—	—	10.3%
2026-10-11T18:00:00+00:00	24.3%	—	—	—	—	—
2026-10-12T00:00:00+00:00	5.8%	—	5.8%	—	—	9.6%
2026-10-12T06:00:00+00:00	17.2%	—	14.1%	—	—	—
2026-10-12T12:00:00+00:00	16.8%	—	13.0%	—	—	6.7%
2026-10-12T18:00:00+00:00	21.7%	—	6.3%	—	—	—
2026-10-13T00:00:00+00:00	13.2%	0.2%	14.7%	—	—	6.4%
2026-10-13T06:00:00+00:00	9.5%	—	22.4%	—	—	—
2026-10-13T12:00:00+00:00	16.2%	15.3%	11.2%	0.4%	—	5.8%
2026-10-13T18:00:00+00:00	3.8%	—	15.7%	—	—	—
2026-10-14T00:00:00+00:00	3.9%	12.0%	6.4%	1.0%	—	1.9%
2026-10-14T06:00:00+00:00	2.0%	—	6.0%	—	—	—
2026-10-14T12:00:00+00:00	10.3%	12.9%	7.0%	0.1%	—	0.8%
2026-10-14T18:00:00+00:00	8.6%	—	8.0%	—	—	—
2026-10-15T00:00:00+00:00	0.4%	8.4%	2.5%	3.0%	—	0.9%
2026-10-15T06:00:00+00:00	3.1%	0.0%	4.7%	—	—	—
2026-10-15T12:00:00+00:00	1.3%	12.5%	2.8%	1.1%	—	0.5%
2026-10-15T18:00:00+00:00	7.0%	4.9%	3.4%	—	—	—
2026-10-16T00:00:00+00:00	0.1%	9.7%	2.2%	1.1%	—	0.1%
2026-10-16T06:00:00+00:00	5.5%	6.3%	1.7%	—	—	0.3%
2026-10-16T12:00:00+00:00	9.8%	4.8%	2.8%	7.0%	—	1.1%
2026-10-16T18:00:00+00:00	10.0%	2.4%	1.9%	—	—	1.1%
2026-10-17T00:00:00+00:00	6.8%	2.1%	1.3%	2.3%	—	1.1%
2026-10-17T06:00:00+00:00	5.4%	1.1%	1.7%	—	—	0.6%
2026-10-17T12:00:00+00:00	4.4%	0.5%	1.4%	0.8%	0.0%	0.4%
2026-10-17T18:00:00+00:00	4.5%	0.6%	1.2%	—	—	0.3%
2026-10-18T00:00:00+00:00	4.0%	1.4%	1.2%	1.3%	—	0.2%
2026-10-18T06:00:00+00:00	2.6%	0.9%	0.6%	0.0%	—	0.1%
2026-10-18T12:00:00+00:00	2.1%	0.8%	0.8%	0.4%	0.0%	0.1%
2026-10-18T18:00:00+00:00	1.9%	1.1%	0.8%	0.4%	—	—
2026-10-19T00:00:00+00:00	1.3%	1.1%	0.9%	0.4%	0.1%	0.1%
2026-10-19T06:00:00+00:00	0.9%	0.4%	0.7%	0.2%	—	0.0%
2026-10-19T12:00:00+00:00	0.6%	0.4%	0.6%	0.1%	0.1%	0.0%
2026-10-19T18:00:00+00:00	0.9%	0.9%	0.7%	0.1%	—	0.0%
2026-10-20T00:00:00+00:00	0.7%	1.8%	0.9%	0.1%	0.1%	0.0%
2026-10-20T06:00:00+00:00	0.3%	—	0.8%	0.1%	—	0.0%

THE MODEL BOX SCORE

Forecasts & evidence

MODEL	YES	MEAN	SPREAD σ	INITIALIZATION UTC	BRIER ↓
WeatherNext 2	42%	76.8°F	3.7°F	2026-10-16 18:00	Pending
AIFS Single	34%	75.6°F	4.6°F	2026-10-16 18:00	Pending
ICON	13%	72.0°F	4.9°F	2026-10-16 12:00	Pending
IFS HRES	6%	69.9°F	5.0°F	2026-10-16 12:00	Pending
IFS Ensemble	<1%	63.8°F	4.9°F	2026-10-16 00:00	Pending
National Blend	<1%	65.0°F	4.4°F	2026-10-17 00:00	Pending
NWS forecast	<1%	64.0°F	3.9°F	2026-10-17 03:00	Pending

Spread is the standard deviation used in the probability approximation. It is not a measured confidence rating. Brier here scores the latest recorded snapshot, not a league deadline.

SETTLEMENT & PROVENANCE

High ≥ 78°F · KDCA

Daily temperature props settle on the ACIS official station record. Inclusive and strict thresholds retain their exact meanings. Provisional observations do not replace the settlement record.

WP-KDCA-20261020-TMAX-GE78
Opened Oct 13 · 08:02 UTC

Original listing: Washington runs hot-for-here: 78°F+ · Tue Oct 20

Original prop, full history & receipt ↗