What it is: a “multi-model comparison” or “spaghetti chart” showing outputs from several deterministic weather-forecast models over Europe. Typically it plots variables like mean sea level pressure (MSLP), 500 hPa geopotential height, or surface temperature over a forecast period (e.g. 0–240 h). link
Why it matters:
You see at a glance how different models agree or diverge — a tight cluster of lines suggests high confidence; widely spread “spaghetti” indicates uncertainty. ski.com.au
Useful for planning: if models diverge, you know to expect increased uncertainty (in pressure fields, fronts, storms).
For ocean navigation or meteorology: you can judge how stable a weather pattern might be, or whether there are alternate scenarios (storm paths, pressure changes, etc.).
Use case: route planning, forecasting uncertainty, deciding whether to trust a single forecast or wait for convergence of multiple models.
openWRF is a regional numerical weather (and sea) model that produces GRIB forecast files for specific maritime and coastal zones (Mediterranean, Atlantic coasts, etc.). OpenSkiron – Home
When you download an openWRF GRIB, you get not only wind and waves but also a rich set of meteorological and ocean parameters: OpenSkiron – OpenWRF Gribs
Wind at 10 m (speed & direction) + gusts
Mean sea level pressure
Precipitation, cloud cover, humidity, surface temperature
Stability / convection indicators (e.g. CAPE) — useful to anticipate squalls/thunderstorms OpenSkiron – Home
Sea state data: significant wave height, swell & wind-sea height, swell/wind-sea periods and directions
Sea currents (velocity & direction) when available (because they integrate sea-current data from service models) OpenSkiron – OpenWRF Gribs
View “Wind-Wave” interactive forecasts online: pick a region, put a pin on the map — then see tables/graphs with forecast evolution (atmosphere + sea) for the next 48–120 hours. OpenSkiron – OpenWRF Gribs
Look at ready-made chart outputs (pressure, wind, waves, etc.) for quick overview. OpenSkiron – Charts
Why it’s useful — what it adds compared to global models
Regional, non-hydrostatic model → better at simulating local weather phenomena, convection, sea breezes, coastal effects, squalls — especially in complex zones (coasts, islands, Mediterráneo). OpenSkiron – Why are Regional Models needed?
High spatial resolution means you capture smaller-scale features (winds funnels, local gusts, wave fields, swell vs wind-sea differentiation) that global models often smooth out.
Combined atmosphere + wave + currents data — very useful for sailing / coastal navigation / passage planning.