Raw model output on the native 0.25° grid — no MOS, no bias correction, no post-processing. Scores understate operational forecast quality. Read the fairness statement →

CastCheck methodology v0.2 · data through 2026-08-30

Aurora (GFS init) (aurora_gfs)

source aiwp · product AURO · initial conditions from GFS · steps every 6 h to 240 h · initializations 0, 12 UTC.

Scores use the latest model version segment, AURO_v100, starting 2026-08-28. Earlier days ran a different version of the model and are excluded rather than silently pooled into the same average.

These pages are always bilinear interpolation, the headline method. The nearest-node variant, and every other window/initialization/interpolation/variable combination, is published on each permanent link below — follow any number.

Daily maximum temperature — MAE °F by station

the last 90 days, 12Z, bilinear. MAE with the bias and n underneath; every cell links to its permanent page. The sparkline shows this station across lead days 1–9 on a scale shared within this table.
Stationd0d1d2d3d4d5d6d7d8d9lead 1–9
KATL 6.56-6.56 · n=2 7.31-7.31 · n=1 KATL MAE by lead day 1 to 9, tmax
KAUS 8.92-8.92 · n=2 9.68-9.68 · n=1 KAUS MAE by lead day 1 to 9, tmax
KBOS 4.39-4.39 · n=2 5.36-5.36 · n=1 KBOS MAE by lead day 1 to 9, tmax
KDCA 7.05-7.05 · n=2 8.79-8.79 · n=1 KDCA MAE by lead day 1 to 9, tmax
KDEN 7.61-7.61 · n=2 5.90-5.90 · n=1 KDEN MAE by lead day 1 to 9, tmax
KDFW 7.21-7.21 · n=2 7.39-7.39 · n=1 KDFW MAE by lead day 1 to 9, tmax
KEWR 4.36-4.36 · n=2 3.20-3.20 · n=1 KEWR MAE by lead day 1 to 9, tmax
KIAH 6.44-6.44 · n=2 7.54-7.54 · n=1 KIAH MAE by lead day 1 to 9, tmax
KLAS 6.44-6.44 · n=2 6.07-6.07 · n=1 KLAS MAE by lead day 1 to 9, tmax
KLAX 6.93-6.93 · n=2 6.28-6.28 · n=1 KLAX MAE by lead day 1 to 9, tmax
KMIA 6.63-6.63 · n=2 6.92-6.92 · n=1 KMIA MAE by lead day 1 to 9, tmax
KMSP 7.82-7.82 · n=2 8.97-8.97 · n=1 KMSP MAE by lead day 1 to 9, tmax
KMSY 7.46-7.46 · n=2 5.57-5.57 · n=1 KMSY MAE by lead day 1 to 9, tmax
KNYC 1.34-1.34 · n=2 0.54-0.54 · n=1 KNYC MAE by lead day 1 to 9, tmax
KOKC 8.24-8.24 · n=2 8.94-8.94 · n=1 KOKC MAE by lead day 1 to 9, tmax
KORD 4.12-4.12 · n=2 8.53-8.53 · n=1 KORD MAE by lead day 1 to 9, tmax
KPHL 5.33-5.33 · n=2 7.15-7.15 · n=1 KPHL MAE by lead day 1 to 9, tmax
KPHX 13.30-13.30 · n=2 15.69-15.69 · n=1 KPHX MAE by lead day 1 to 9, tmax
KSAN 6.71-6.71 · n=2 4.48-4.48 · n=1 KSAN MAE by lead day 1 to 9, tmax
KSAT 7.90-7.90 · n=2 8.04-8.04 · n=1 KSAT MAE by lead day 1 to 9, tmax
KSEA 6.50-6.50 · n=2 4.84-4.84 · n=1 KSEA MAE by lead day 1 to 9, tmax
KSFO 6.92-6.92 · n=2 6.19-6.19 · n=1 KSFO MAE by lead day 1 to 9, tmax
KTTN 1.91-1.91 · n=2 2.93-2.93 · n=1 KTTN MAE by lead day 1 to 9, tmax

Up to 2 of the scored days in this table carry a QC flag on the observation (a CLI value that disagreed with the hourly observations, or a fallback source). They are kept in the scores and counted here rather than dropped — see methodology.

+ model too warm · − model too cold · bias interval includes zero · ★ lowest MAE · = not distinguishable from the leader · ▼ significantly worse · n < 30 greyed and unranked · CI is a 95 % moving-block bootstrap interval.

Daily minimum temperature — MAE °F by station

the last 90 days, 12Z, bilinear. MAE with the bias and n underneath; every cell links to its permanent page. The sparkline shows this station across lead days 1–9 on a scale shared within this table.
Stationd0d1d2d3d4d5d6d7d8d9lead 1–9
KATL 0.96-0.96 · n=2 0.51-0.51 · n=1 KATL MAE by lead day 1 to 9, tmin
KAUS 5.76+5.76 · n=2 4.37+4.37 · n=1 KAUS MAE by lead day 1 to 9, tmin
KBOS 3.31-3.31 · n=2 5.13-5.13 · n=1 KBOS MAE by lead day 1 to 9, tmin
KDCA 1.24-0.39 · n=2 1.06-1.06 · n=1 KDCA MAE by lead day 1 to 9, tmin
KDEN 3.99+3.99 · n=2 1.94+1.94 · n=1 KDEN MAE by lead day 1 to 9, tmin
KDFW 1.15+1.15 · n=2 0.29-0.29 · n=1 KDFW MAE by lead day 1 to 9, tmin
KEWR 1.97+1.97 · n=2 2.33+2.33 · n=1 KEWR MAE by lead day 1 to 9, tmin
KIAH 0.74+0.74 · n=2 0.48+0.48 · n=1 KIAH MAE by lead day 1 to 9, tmin
KLAS 7.33-7.33 · n=2 8.46-8.46 · n=1 KLAS MAE by lead day 1 to 9, tmin
KLAX 2.72-2.72 · n=2 2.93-2.93 · n=1 KLAX MAE by lead day 1 to 9, tmin
KMIA 2.94+1.06 · n=2 2.35-2.35 · n=1 KMIA MAE by lead day 1 to 9, tmin
KMSP 1.45-0.53 · n=2 1.98-1.98 · n=1 KMSP MAE by lead day 1 to 9, tmin
KMSY 2.59-0.56 · n=2 3.10-3.10 · n=1 KMSY MAE by lead day 1 to 9, tmin
KNYC 0.77+0.77 · n=2 0.70+0.70 · n=1 KNYC MAE by lead day 1 to 9, tmin
KOKC 5.88+5.88 · n=2 4.10+4.10 · n=1 KOKC MAE by lead day 1 to 9, tmin
KORD 1.41+1.41 · n=2 0.31-0.31 · n=1 KORD MAE by lead day 1 to 9, tmin
KPHL 0.79+0.79 · n=2 2.04+2.04 · n=1 KPHL MAE by lead day 1 to 9, tmin
KPHX 5.90-5.90 · n=2 8.23-8.23 · n=1 KPHX MAE by lead day 1 to 9, tmin
KSAN 2.42-2.42 · n=2 3.19-3.19 · n=1 KSAN MAE by lead day 1 to 9, tmin
KSAT 1.54-0.31 · n=2 2.60-2.60 · n=1 KSAT MAE by lead day 1 to 9, tmin
KSEA 0.90+0.80 · n=2 0.01-0.01 · n=1 KSEA MAE by lead day 1 to 9, tmin
KSFO 0.54+0.30 · n=2 0.36-0.36 · n=1 KSFO MAE by lead day 1 to 9, tmin
KTTN 5.60+5.60 · n=2 6.91+6.91 · n=1 KTTN MAE by lead day 1 to 9, tmin

Up to 2 of the scored days in this table carry a QC flag on the observation (a CLI value that disagreed with the hourly observations, or a fallback source). They are kept in the scores and counted here rather than dropped — see methodology.

Month-by-month slices live on the canonical page: they do not depend on the window, initialization or interpolation selected here.

Source and licence

Where it comes from

aiwp · AURO · GFS initial conditions

Steps every 6 h to 240 h; sampled at 00/06/12/18 UTC only.

Licence

NOAA/CIRA AIWP, U.S. Government work, public domain. Cite Radford et al. (2025), BAMS, doi:10.1175/BAMS-D-24-0057.1.

Post-processing

None. Raw grid values, bilinear (headline) or nearest-node interpolation, no MOS, no bias correction, no downscaling.

All scores as JSON scores_latest.csv daily_errors.csv.gz data & licences