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, 00Z, 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 6.59-6.59 · n=2 7.11-7.11 · n=1 KATL MAE by lead day 1 to 9, tmax
KAUS 7.40-7.40 · n=2 9.37-9.37 · n=1 KAUS MAE by lead day 1 to 9, tmax
KBOS 3.94-3.94 · n=2 5.54-5.54 · n=1 KBOS MAE by lead day 1 to 9, tmax
KDCA 6.64-6.64 · n=2 8.08-8.08 · n=1 KDCA MAE by lead day 1 to 9, tmax
KDEN 6.09-6.09 · n=2 5.01-5.01 · n=1 KDEN MAE by lead day 1 to 9, tmax
KDFW 4.68-4.68 · n=2 6.05-6.05 · n=1 KDFW MAE by lead day 1 to 9, tmax
KEWR 3.96-3.96 · n=2 2.84-2.84 · n=1 KEWR MAE by lead day 1 to 9, tmax
KIAH 5.35-5.35 · n=2 6.38-6.38 · n=1 KIAH MAE by lead day 1 to 9, tmax
KLAS 5.38-5.38 · n=2 5.12-5.12 · n=1 KLAS MAE by lead day 1 to 9, tmax
KLAX 5.90-5.90 · n=2 5.95-5.95 · n=1 KLAX MAE by lead day 1 to 9, tmax
KMIA 6.96-6.96 · n=2 6.93-6.93 · n=1 KMIA MAE by lead day 1 to 9, tmax
KMSP 6.37-6.37 · n=2 8.11-8.11 · n=1 KMSP MAE by lead day 1 to 9, tmax
KMSY 7.03-7.03 · n=2 7.22-7.22 · n=1 KMSY MAE by lead day 1 to 9, tmax
KNYC 0.95-0.95 · n=2 0.24-0.24 · n=1 KNYC MAE by lead day 1 to 9, tmax
KOKC 5.15-5.15 · n=2 7.52-7.52 · n=1 KOKC MAE by lead day 1 to 9, tmax
KORD 5.11-5.11 · n=2 6.69-6.69 · n=1 KORD MAE by lead day 1 to 9, tmax
KPHL 5.01-5.01 · n=2 6.52-6.52 · n=1 KPHL MAE by lead day 1 to 9, tmax
KPHX 13.44-13.44 · n=2 14.58-14.58 · n=1 KPHX MAE by lead day 1 to 9, tmax
KSAN 5.78-5.78 · n=2 4.06-4.06 · n=1 KSAN MAE by lead day 1 to 9, tmax
KSAT 7.33-7.33 · n=2 7.82-7.82 · n=1 KSAT MAE by lead day 1 to 9, tmax
KSEA 5.10-5.10 · n=2 4.50-4.50 · n=1 KSEA MAE by lead day 1 to 9, tmax
KSFO 7.68-7.68 · n=2 6.64-6.64 · n=1 KSFO MAE by lead day 1 to 9, tmax
KTTN 1.62-1.62 · n=2 2.43-2.43 · 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, 00Z, 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 1.27-1.27 · n=2 0.51-0.51 · n=1 KATL MAE by lead day 1 to 9, tmin
KAUS 5.95+5.95 · n=2 4.73+4.73 · n=1 KAUS MAE by lead day 1 to 9, tmin
KBOS 3.59-3.59 · n=2 4.79-4.79 · n=1 KBOS MAE by lead day 1 to 9, tmin
KDCA 1.70-1.70 · n=2 1.54-1.54 · n=1 KDCA MAE by lead day 1 to 9, tmin
KDEN 4.22+4.22 · n=2 2.89+2.89 · n=1 KDEN MAE by lead day 1 to 9, tmin
KDFW 3.12+3.12 · n=2 0.56+0.56 · n=1 KDFW MAE by lead day 1 to 9, tmin
KEWR 1.70+1.70 · n=2 2.04+2.04 · n=1 KEWR MAE by lead day 1 to 9, tmin
KIAH 1.02+1.02 · n=2 0.73+0.73 · n=1 KIAH MAE by lead day 1 to 9, tmin
KLAS 6.88-6.88 · n=2 8.05-8.05 · n=1 KLAS MAE by lead day 1 to 9, tmin
KLAX 1.90-1.90 · n=2 2.74-2.74 · n=1 KLAX MAE by lead day 1 to 9, tmin
KMIA 2.72+1.99 · n=2 2.10-2.10 · n=1 KMIA MAE by lead day 1 to 9, tmin
KMSP 0.51+0.44 · n=2 2.13-2.13 · n=1 KMSP MAE by lead day 1 to 9, tmin
KMSY 2.67-0.05 · n=2 3.19-3.19 · n=1 KMSY MAE by lead day 1 to 9, tmin
KNYC 0.82+0.82 · n=2 0.51+0.51 · n=1 KNYC MAE by lead day 1 to 9, tmin
KOKC 7.90+7.90 · n=2 5.94+5.94 · n=1 KOKC MAE by lead day 1 to 9, tmin
KORD 0.91+0.91 · n=2 0.87+0.87 · n=1 KORD MAE by lead day 1 to 9, tmin
KPHL 0.66-0.35 · n=2 1.31+1.31 · n=1 KPHL MAE by lead day 1 to 9, tmin
KPHX 5.38-5.38 · n=2 6.82-6.82 · n=1 KPHX MAE by lead day 1 to 9, tmin
KSAN 2.08-2.08 · n=2 3.02-3.02 · n=1 KSAN MAE by lead day 1 to 9, tmin
KSAT 0.99-0.99 · n=2 2.30-2.30 · n=1 KSAT MAE by lead day 1 to 9, tmin
KSEA 1.13+1.13 · n=2 0.38+0.38 · n=1 KSEA MAE by lead day 1 to 9, tmin
KSFO 0.57+0.24 · n=2 0.33-0.33 · n=1 KSFO MAE by lead day 1 to 9, tmin
KTTN 4.25+4.25 · n=2 6.21+6.21 · 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

MAE °F at lead day 1, 00Z, bilinear, daily maximum, per station.

MonthKATLKAUSKBOSKDCAKDENKDFWKEWRKIAHKLASKLAXKMIAKMSPKMSYKNYCKOKCKORDKPHLKPHXKSANKSATKSEAKSFOKTTN
2026-08 7.11-7.11 · n=19.37-9.37 · n=15.54-5.54 · n=18.08-8.08 · n=15.01-5.01 · n=16.05-6.05 · n=12.84-2.84 · n=16.38-6.38 · n=15.12-5.12 · n=15.95-5.95 · n=16.93-6.93 · n=18.11-8.11 · n=17.22-7.22 · n=10.24-0.24 · n=17.52-7.52 · n=16.69-6.69 · n=16.52-6.52 · n=114.58-14.58 · n=14.06-4.06 · n=17.82-7.82 · n=14.50-4.50 · n=16.64-6.64 · n=12.43-2.43 · n=1

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