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

Las Vegas Harry Reid · Pangu-Weather (IFS init) · lead day 1

KLAS · pangu_ifs · lead 1

Target day = initialization date + 1 day. This page is a permanent link: the numbers change as history accumulates, the address and the methodology version do not.

Scores use the latest model version segment, PANG_v100, starting 2026-08-28 — days before that ran a different version of the model and are excluded rather than silently pooled. Of the scored days, 2 carry a QC flag on the observation.

JSON for this page CSV of the daily errors Cite this page

Every number for this combination

All four windows × both initializations × both interpolations × both variables. Errors are computed in °C and shown in °F; CI is a 95 % moving-block bootstrap interval. MAE debiased and skill, debiased remove the constant offset of the window first, so a station that the model always reads a degree too warm is not scored as if it had no skill — compare the two skill columns to see how much of the error is a fixed offset. n QC next to n counts days whose observation carries a QC flag.

VariableInitMethod Windown MAE °F MAE debiased Bias °F RMSE °F ±1 °F±2 °F±3 °F Skill Skill, debiased Period
tmax00Zbilinear30d2 2 QC5.80 [4.53, 7.08]1.28-5.80 [-7.08, -4.53]5.94 [4.53, 7.08]0% [0%, 0%]0%0%-0.66+0.152026-08-29 → 2026-08-30
tmax00Zbilinear90d2 2 QC5.80 [4.53, 7.08]1.28-5.80 [-7.08, -4.53]5.94 [4.53, 7.08]0% [0%, 0%]0%0%-0.66+0.152026-08-29 → 2026-08-30
tmax00Zbilinear365d2 2 QC5.80 [4.53, 7.08]1.28-5.80 [-7.08, -4.53]5.94 [4.53, 7.08]0% [0%, 0%]0%0%-0.66+0.152026-08-29 → 2026-08-30
tmax00Zbilinearall2 2 QC5.80 [4.53, 7.08]1.28-5.80 [-7.08, -4.53]5.94 [4.53, 7.08]0% [0%, 0%]0%0%-0.66+0.152026-08-29 → 2026-08-30
tmax00Znearest30d2 2 QC7.36 [6.04, 8.69]1.32-7.36 [-8.69, -6.04]7.48 [6.04, 8.69]0% [0%, 0%]0%0%-1.10+0.122026-08-29 → 2026-08-30
tmax00Znearest90d2 2 QC7.36 [6.04, 8.69]1.32-7.36 [-8.69, -6.04]7.48 [6.04, 8.69]0% [0%, 0%]0%0%-1.10+0.122026-08-29 → 2026-08-30
tmax00Znearest365d2 2 QC7.36 [6.04, 8.69]1.32-7.36 [-8.69, -6.04]7.48 [6.04, 8.69]0% [0%, 0%]0%0%-1.10+0.122026-08-29 → 2026-08-30
tmax00Znearestall2 2 QC7.36 [6.04, 8.69]1.32-7.36 [-8.69, -6.04]7.48 [6.04, 8.69]0% [0%, 0%]0%0%-1.10+0.122026-08-29 → 2026-08-30
tmax12Zbilinear30d2 2 QC5.31 [3.60, 7.01]1.70-5.31 [-7.01, -3.60]5.57 [3.60, 7.01]0% [0%, 0%]0%0%-0.52-0.132026-08-29 → 2026-08-30
tmax12Zbilinear90d2 2 QC5.31 [3.60, 7.01]1.70-5.31 [-7.01, -3.60]5.57 [3.60, 7.01]0% [0%, 0%]0%0%-0.52-0.132026-08-29 → 2026-08-30
tmax12Zbilinear365d2 2 QC5.31 [3.60, 7.01]1.70-5.31 [-7.01, -3.60]5.57 [3.60, 7.01]0% [0%, 0%]0%0%-0.52-0.132026-08-29 → 2026-08-30
tmax12Zbilinearall2 2 QC5.31 [3.60, 7.01]1.70-5.31 [-7.01, -3.60]5.57 [3.60, 7.01]0% [0%, 0%]0%0%-0.52-0.132026-08-29 → 2026-08-30
tmax12Znearest30d2 2 QC6.51 [4.71, 8.31]1.80-6.51 [-8.31, -4.71]6.75 [4.71, 8.31]0% [0%, 0%]0%0%-0.86-0.202026-08-29 → 2026-08-30
tmax12Znearest90d2 2 QC6.51 [4.71, 8.31]1.80-6.51 [-8.31, -4.71]6.75 [4.71, 8.31]0% [0%, 0%]0%0%-0.86-0.202026-08-29 → 2026-08-30
tmax12Znearest365d2 2 QC6.51 [4.71, 8.31]1.80-6.51 [-8.31, -4.71]6.75 [4.71, 8.31]0% [0%, 0%]0%0%-0.86-0.202026-08-29 → 2026-08-30
tmax12Znearestall2 2 QC6.51 [4.71, 8.31]1.80-6.51 [-8.31, -4.71]6.75 [4.71, 8.31]0% [0%, 0%]0%0%-0.86-0.202026-08-29 → 2026-08-30
tmin00Zbilinear30d2 2 QC6.21 [5.13, 7.30]1.09-6.21 [-7.30, -5.13]6.31 [5.13, 7.30]0% [0%, 0%]0%0%-2.11-0.092026-08-29 → 2026-08-30
tmin00Zbilinear90d2 2 QC6.21 [5.13, 7.30]1.09-6.21 [-7.30, -5.13]6.31 [5.13, 7.30]0% [0%, 0%]0%0%-2.11-0.092026-08-29 → 2026-08-30
tmin00Zbilinear365d2 2 QC6.21 [5.13, 7.30]1.09-6.21 [-7.30, -5.13]6.31 [5.13, 7.30]0% [0%, 0%]0%0%-2.11-0.092026-08-29 → 2026-08-30
tmin00Zbilinearall2 2 QC6.21 [5.13, 7.30]1.09-6.21 [-7.30, -5.13]6.31 [5.13, 7.30]0% [0%, 0%]0%0%-2.11-0.092026-08-29 → 2026-08-30
tmin00Znearest30d2 2 QC7.26 [6.08, 8.44]1.18-7.26 [-8.44, -6.08]7.35 [6.08, 8.44]0% [0%, 0%]0%0%-2.63-0.182026-08-29 → 2026-08-30
tmin00Znearest90d2 2 QC7.26 [6.08, 8.44]1.18-7.26 [-8.44, -6.08]7.35 [6.08, 8.44]0% [0%, 0%]0%0%-2.63-0.182026-08-29 → 2026-08-30
tmin00Znearest365d2 2 QC7.26 [6.08, 8.44]1.18-7.26 [-8.44, -6.08]7.35 [6.08, 8.44]0% [0%, 0%]0%0%-2.63-0.182026-08-29 → 2026-08-30
tmin00Znearestall2 2 QC7.26 [6.08, 8.44]1.18-7.26 [-8.44, -6.08]7.35 [6.08, 8.44]0% [0%, 0%]0%0%-2.63-0.182026-08-29 → 2026-08-30
tmin12Zbilinear30d2 2 QC6.33 [5.41, 7.24]0.91-6.33 [-7.24, -5.41]6.39 [5.41, 7.24]0% [0%, 0%]0%0%-2.16+0.092026-08-29 → 2026-08-30
tmin12Zbilinear90d2 2 QC6.33 [5.41, 7.24]0.91-6.33 [-7.24, -5.41]6.39 [5.41, 7.24]0% [0%, 0%]0%0%-2.16+0.092026-08-29 → 2026-08-30
tmin12Zbilinear365d2 2 QC6.33 [5.41, 7.24]0.91-6.33 [-7.24, -5.41]6.39 [5.41, 7.24]0% [0%, 0%]0%0%-2.16+0.092026-08-29 → 2026-08-30
tmin12Zbilinearall2 2 QC6.33 [5.41, 7.24]0.91-6.33 [-7.24, -5.41]6.39 [5.41, 7.24]0% [0%, 0%]0%0%-2.16+0.092026-08-29 → 2026-08-30
tmin12Znearest30d2 2 QC8.14 [7.08, 9.20]1.06-8.14 [-9.20, -7.08]8.21 [7.08, 9.20]0% [0%, 0%]0%0%-3.07-0.062026-08-29 → 2026-08-30
tmin12Znearest90d2 2 QC8.14 [7.08, 9.20]1.06-8.14 [-9.20, -7.08]8.21 [7.08, 9.20]0% [0%, 0%]0%0%-3.07-0.062026-08-29 → 2026-08-30
tmin12Znearest365d2 2 QC8.14 [7.08, 9.20]1.06-8.14 [-9.20, -7.08]8.21 [7.08, 9.20]0% [0%, 0%]0%0%-3.07-0.062026-08-29 → 2026-08-30
tmin12Znearestall2 2 QC8.14 [7.08, 9.20]1.06-8.14 [-9.20, -7.08]8.21 [7.08, 9.20]0% [0%, 0%]0%0%-3.07-0.062026-08-29 → 2026-08-30

+ 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 error, last 90 days

Daily forecast minus observed error in °F for Pangu-Weather (IFS init) at KLAS, lead day 1, 00Z bilinear tmax+10+50-5-102026-08-29: -7.08 °F2026-08-30: -4.53 °F2026-08-292026-08-30°F, forecast − observed
Forecast − observed, °F, 00Z bilinear daily maximum. The dashed line is zero; the thick line is a centred 7-day mean, drawn only where the whole window is present. Gaps are days with no score, never interpolation. Hover a point for its date and value.
The same series as a table (2 days, newest first) · download CSV
Climatological dayError °F
2026-08-30-4.53
2026-08-29-7.08

Error distribution

Distribution of the signed daily error in °F for Pangu-Weather (IFS init) at KLAS, lead day 1-10 to -9 °F: 0 days-9 to -8 °F: 0 days-8 to -7 °F: 1 day-7 to -6 °F: 0 days-6 to -5 °F: 0 days-5 to -4 °F: 1 day-4 to -3 °F: 0 days-3 to -2 °F: 0 days-2 to -1 °F: 0 days-1 to 0 °F: 0 days0 to 1 °F: 0 days1 to 2 °F: 0 days2 to 3 °F: 0 days3 to 4 °F: 0 days4 to 5 °F: 0 days5 to 6 °F: 0 days6 to 7 °F: 0 days7 to 8 °F: 0 days8 to 9 °F: 0 days9 to 10 °F: 0 daysdashed: P50 |e| 5.8 · P90 |e| 6.82 °F-100+10 °Fn = 2 days
All scored days for 00Z bilinear daily maximum, 20 equal bins. The dashed marks are the 50th and 90th percentiles of the absolute error, mirrored on both sides. Hover a bar for its bin and count.
Bin counts as a table
From °FTo °FDays
-10.00-9.000
-9.00-8.000
-8.00-7.001
-7.00-6.000
-6.00-5.000
-5.00-4.001
-4.00-3.000
-3.00-2.000
-2.00-1.000
-1.00+0.000
+0.00+1.000
+1.00+2.000
+2.00+3.000
+3.00+4.000
+4.00+5.000
+5.00+6.000
+6.00+7.000
+7.00+8.000
+8.00+9.000
+9.00+10.000

Month by month

00Z bilinear daily maximum, newest first.

Monthn MAE °FBias °F
2026-0825.80 -5.80

Availability

ModelScored period DaysCoverage
Pangu-Weather (IFS init)2026-08-29 → 2026-08-30 2
Pangu-Weather (IFS init)2026-08-29 → 2026-08-30 2
Pangu-Weather (IFS init)2026-08-29 → 2026-08-30 2
Pangu-Weather (IFS init)2026-08-29 → 2026-08-30 2

Compared with other models

Paired bootstrap on the days both models cover (90d, 00Z, bilinear, daily maximum). Negative means Pangu-Weather (IFS init) has the lower MAE. "Distinguishable" means the 95 % interval excludes zero.

Other modelCommon days MAE difference °FDistinguishable
ECMWF AIFS Single 2 +1.32 [0.83, 1.81] yes
Aurora (GFS init) 1 -0.60 [-0.60, -0.60] yes
Aurora (IFS init) 2 +1.83 [1.75, 1.90] yes
FourCastNet v2 (GFS init) 1 +0.07 [0.07, 0.07] yes
FourCastNet v2 (IFS init) 2 -0.27 [-2.20, 1.67] no
NCEP GFS 2 +0.02 [-0.25, 0.29] no
GraphCast (GFS init) 1 -3.11 [-3.11, -3.11] yes
GraphCast (IFS init) 2 +1.14 [0.75, 1.54] yes
ECMWF IFS HRES 2 +1.96 [1.68, 2.23] yes
Pangu-Weather (GFS init) 1 -0.36 [-0.36, -0.36] yes
Persistence (baseline) 2 +2.30 [-0.47, 5.08] no

Cite this page

ShortCastCheck, KLAS pangu_ifs lead 1, methodology v0.2, accessed 2026-08-31, https://castcheck.zifanzhang.com/station/KLAS/model/pangu_ifs/lead/1/

LongCastCheck (2026). Station-level verification of raw weather-model 2 m temperature forecasts: KLAS (Las Vegas Harry Reid), model pangu_ifs, lead day 1. Methodology version 0.2, schema version 0.1, data through 2026-08-30. Accessed 2026-08-31. https://castcheck.zifanzhang.com/station/KLAS/model/pangu_ifs/lead/1/

Accessed2026-08-31 (data through 2026-08-30; page built 2026-08-31T03:52:06+00:00)

JSON CSV all scores methodology v0.2 licence