GFS (USA Forecast Model)
95%
67 temperature samples · 1 matched rain periods
Temperature + precipitation · Higher is better
Forecasts from 6 hours and 30 minutes–12 hours and 20 minutes ago
Parnassos Kelaria
What are GFS and ECMWF predicting at the time of the latest station reading?
← Live Weather map · Refresh comparisonSelected forecast: Latest available
Uses the forecast available when each sample was recorded. Select an earlier forecast age to evaluate predictions made days in advance.
Forecast Accuracy
ECMWF (European Forecast Model)
96%
60 temperature samples · 1 matched rain periods
Temperature + precipitation · Higher is better
Forecasts from 23 hours and 30 minutes–36 hours ago
A gradual agreement score: each temperature sample starts at 100 and loses 5 points per °C of error; each matched rain period loses 10 points per mm of error, with a minimum of zero. Temperature and rain averages carry equal weight when both are available. Wind is excluded. Rain requires matching interval boundaries and excludes counter resets and forecast snow. Until rainfall history is available, only temperature is scored. This is a site-defined comparison scale, not a statistical probability or a standard measure of forecast accuracy.
No current, valid Parnassos Kelaria observation is available. Comparisons pause when the station reading is older than 60 minutes.
The last 24 hours
A snapshot every ten minutes. The graphs show the last 24 hours; older records are retained for future analysis. Gaps longer than 30 minutes are left disconnected.
| Time (Greece) | Observed (°C) | GFS (°C) | GFS difference (°C) | ECMWF (°C) | ECMWF difference (°C) |
|---|---|---|---|---|---|
| Wed 21/10 16:20 | 11.3 | 12.2 | +0.9 | Unavailable | Unavailable |
| Wed 21/10 16:10 | 11.3 | 12.2 | +0.9 | Unavailable | Unavailable |
| Wed 21/10 15:50 | 11.4 | 12.1 | +0.7 | Unavailable | Unavailable |
| Wed 21/10 15:40 | 11.5 | 12.1 | +0.6 | Unavailable | Unavailable |
| Wed 21/10 15:30 | 11.2 | 12.1 | +0.9 | Unavailable | Unavailable |
| Wed 21/10 15:20 | 11.2 | 12.2 | +1.0 | Unavailable | Unavailable |
| Wed 21/10 15:10 | 11.6 | 12.2 | +0.6 | Unavailable | Unavailable |
| Wed 21/10 15:00 | 11.6 | 12.2 | +0.6 | 10.8 | -0.8 |
| Wed 21/10 14:50 | 11.4 | 12.2 | +0.8 | 10.8 | -0.6 |
| Wed 21/10 14:40 | 11.7 | 12.2 | +0.5 | 10.8 | -0.9 |
| Wed 21/10 14:30 | 11.6 | 12.1 | +0.5 | 10.8 | -0.8 |
| Wed 21/10 14:20 | 11.6 | 12.1 | +0.5 | 10.8 | -0.8 |
| Wed 21/10 14:10 | 11.7 | 12.1 | +0.4 | 10.8 | -0.9 |
| Wed 21/10 14:00 | 11.6 | 12.1 | +0.5 | 10.8 | -0.8 |
| Wed 21/10 13:50 | 11.6 | 12.0 | +0.4 | 10.8 | -0.8 |
| Wed 21/10 13:40 | 11.4 | 12.0 | +0.6 | 10.8 | -0.6 |
| Wed 21/10 13:30 | 11.4 | 12.0 | +0.6 | 10.8 | -0.7 |
| Wed 21/10 13:20 | 11.8 | 12.0 | +0.2 | 10.7 | -1.1 |
| Wed 21/10 13:10 | 11.6 | 12.0 | +0.4 | 10.7 | -0.9 |
| Wed 21/10 13:00 | 11.8 | 11.9 | +0.1 | 10.7 | -1.1 |
| Wed 21/10 12:50 | 11.8 | 11.9 | +0.1 | 10.7 | -1.1 |
| Wed 21/10 12:30 | 11.6 | 11.9 | +0.3 | 10.7 | -0.9 |
| Wed 21/10 12:20 | 11.5 | 11.8 | +0.3 | 10.7 | -0.8 |
| Wed 21/10 12:10 | 11.3 | 11.8 | +0.5 | 10.7 | -0.6 |
| Wed 21/10 12:00 | 11.5 | 11.8 | +0.3 | 10.7 | -0.8 |
| Wed 21/10 11:50 | 11.5 | 11.8 | +0.3 | 10.7 | -0.8 |
| Wed 21/10 11:40 | 11.6 | 11.8 | +0.2 | 10.7 | -0.9 |
| Wed 21/10 11:30 | 11.4 | 11.8 | +0.4 | 10.7 | -0.7 |
| Wed 21/10 11:20 | 11.3 | 11.8 | +0.5 | 10.7 | -0.6 |
| Wed 21/10 11:10 | 11.2 | 11.7 | +0.5 | 10.6 | -0.6 |
| Wed 21/10 11:00 | 11.2 | 11.7 | +0.5 | 10.6 | -0.6 |
| Wed 21/10 10:50 | 10.9 | 11.7 | +0.8 | 10.6 | -0.3 |
| Wed 21/10 10:40 | 10.8 | 11.7 | +0.9 | 10.6 | -0.2 |
| Wed 21/10 10:30 | 10.7 | 11.7 | +1.0 | 10.6 | -0.1 |
| Wed 21/10 10:20 | 10.6 | 11.7 | +1.1 | 10.6 | 0.0 |
| Wed 21/10 10:10 | 10.6 | 11.7 | +1.1 | 10.6 | 0.0 |
| Wed 21/10 10:00 | 10.5 | 11.7 | +1.2 | 10.6 | +0.1 |
| Wed 21/10 07:50 | 7.4 | 11.6 | +4.2 | 10.4 | +3.0 |
| Wed 21/10 07:40 | 7.4 | 11.6 | +4.2 | 10.4 | +3.0 |
| Wed 21/10 07:30 | 7.4 | 11.6 | +4.2 | 10.4 | +3.0 |
| Wed 21/10 07:20 | 7.6 | 11.5 | +3.9 | 10.4 | +2.8 |
| Wed 21/10 07:10 | 7.7 | 11.5 | +3.8 | 10.4 | +2.7 |
| Wed 21/10 07:00 | 7.8 | 11.5 | +3.7 | 10.4 | +2.6 |
| Wed 21/10 06:50 | 7.7 | 11.5 | +3.8 | 10.4 | +2.7 |
| Wed 21/10 06:40 | 8.0 | 11.5 | +3.5 | 10.3 | +2.3 |
| Wed 21/10 06:30 | 8.2 | 11.5 | +3.3 | 10.3 | +2.1 |
| Wed 21/10 06:20 | 8.6 | 11.5 | +2.9 | 10.3 | +1.7 |
| Wed 21/10 06:10 | 8.8 | 11.5 | +2.7 | 10.3 | +1.5 |
| Wed 21/10 05:30 | 8.9 | 11.5 | +2.6 | 10.3 | +1.4 |
| Wed 21/10 05:20 | 9.0 | 11.5 | +2.5 | 10.3 | +1.3 |
| Wed 21/10 05:10 | 8.7 | 11.5 | +2.8 | 10.3 | +1.6 |
| Wed 21/10 05:00 | 8.5 | 11.5 | +3.0 | 10.3 | +1.8 |
| Wed 21/10 04:50 | 8.3 | 11.5 | +3.2 | 10.3 | +2.0 |
| Wed 21/10 04:40 | 8.3 | 11.5 | +3.2 | 10.3 | +2.0 |
| Wed 21/10 04:30 | 8.1 | 11.5 | +3.4 | 10.4 | +2.3 |
| Wed 21/10 04:20 | 7.9 | 11.4 | +3.5 | 10.4 | +2.5 |
| Wed 21/10 04:10 | 7.8 | 11.4 | +3.6 | 10.4 | +2.6 |
| Wed 21/10 04:00 | 8.2 | 11.4 | +3.2 | 10.4 | +2.2 |
| Wed 21/10 03:50 | 8.3 | 11.4 | +3.1 | 10.4 | +2.1 |
| Wed 21/10 03:40 | 8.1 | 11.4 | +3.3 | 10.4 | +2.3 |
| Wed 21/10 03:30 | 8.1 | 11.4 | +3.3 | 10.4 | +2.3 |
| Wed 21/10 03:20 | 8.5 | 11.4 | +2.9 | 10.4 | +1.9 |
| Wed 21/10 03:10 | 8.6 | 11.4 | +2.8 | 10.4 | +1.8 |
| Wed 21/10 03:00 | 8.4 | 11.4 | +3.0 | 10.4 | +2.0 |
| Wed 21/10 02:50 | 8.2 | 11.4 | +3.2 | 10.4 | +2.2 |
| Wed 21/10 02:40 | 8.2 | 11.4 | +3.2 | 10.4 | +2.2 |
| Wed 21/10 02:30 | 8.2 | 11.4 | +3.2 | 10.4 | +2.2 |
Newest readings first. Forecasts follow the selected forecast age. Positive differences mean the model is warmer than the station.
● Observed● GFS● ECMWF
67 recorded samples · Latest observation Wed 21/10 16:20
Each sample preserves the models available when it was collected; later runs do not rewrite older comparisons. Scores and model lines follow the selected forecast age. Days ahead are measured from model initialization to observation time; the actual lead is shown on each card. Snowfall is not measured by the station, so there is no observed snowfall comparison graph.
How to interpret this pilot
Temperature and wind speed use the site's existing coordinate interpolation and altitude adjustment. We linearly interpolate their forecast values between the steps surrounding the observation time; these are estimates between model steps, not new observations. Positive differences mean the model is warmer or windier.
Station wind exposure and averaging periods may differ from the models. Spatial resolution, terrain and sensor quality can also affect agreement. Latest available uses the run saved with each observation. Earlier lead times use immutable archived runs saved before the observation, with the same coordinates and altitude. Archive collection starts now; earlier missing forecasts are not reconstructed.
One matched sample cannot establish correlation, bias or forecast skill. Those require repeated observations paired with archived forecasts and defined lead times. No automatic forecast correction is applied.
Only fresh Parnassos Kelaria readings are used. Missing or suspect measurements remain unavailable. Results are cached for two minutes; use Refresh comparison for the latest snapshot.