| waiting for history |
Detail
Temperature & dewpoint
hover for valuesWind
gust and meanPressure
sea levelRainfall
accumulated ▬ rate ▬Sunshine and UV
estimated, not a sunshine recorderForecast
Met ÉireannRainfall radar
— ·Sun & moon
computed for this positionWind rose
24 hours, by directionAgainst the official station
| Here | Official | Diff |
|---|
A difference is not an error — the two sites are kilometres apart, at different heights, over different ground. What this is for is the pattern over time: a steady warm offset on calm sunny days points at the radiation shield, a constant pressure offset points at the altitude setting, and agreement across a week is real reassurance.
Tides and sea state
Water level
Sea state
Sea fog risk
Sea fog forms when wind carries air out over water that is
colder than the air’s dew point. The dew point
is the temperature at which air can hold no more moisture. Cool
the air below it and the water has to go somewhere, so it turns
into the tiny droplets we see as fog.
That is why we compare the sea against the dew point and not
against the air temperature. It also explains something that
sounds backwards: a warm spring day is far more likely to bring
sea fog here than a cold winter one. Warm air holds more
moisture, so its dew point is higher, and the sea only has to
be cooler than that.
The wind matters too. Without it, nothing is carried in off the
water. Too much of it and the fog gets stirred upwards into low
cloud instead of sitting at ground level.
This is a prediction, not a sighting. We have
no instrument that can see fog. All we can tell you is whether
the conditions for it are in place.
Checked against an aerodrome
Weather buoys
| Buoy | Waves | Model | Sea | Wind |
|---|
Air quality and pollen
Pollutants
| Concentration | Index |
|---|
Pollen
| Count | Band |
|---|
Daily peak
Rain cross-check
WH40 bucket vs WS90 piezo| Rate | Bucket | Piezo | Ratio |
|---|---|---|---|
| no rainfall recorded with both gauges yet | |||
Records
all records →| building — needs daily summaries |
Forecast scoreboard
mean absolute error, °CEvery forecast is saved the moment it arrives, then compared against what this station actually measured when that hour came around. The figure is mean absolute error in °C — lower is better: how far out the forecast was, on average.
Columns are how far ahead the forecast was made. That split is the whole point — everyone is accurate three hours out, and the differences only appear at a day or more. Persistence is the baseline: simply "the same as it was 24 hours ago". A provider that cannot beat it is not adding anything, which is a more useful question than which one feels right.
| Collecting. Nothing here is meaningful until a few days of forecasts have been made and then lived through. |