Model guidance

The numerical guidance behind the forecast.

Sample content — not an operational product

The model charts on this page is not yet published from the GMS forecast system. The figures on this page are illustrative and must not be used for any weather, marine or safety decision.

Models in use

Model	Run by	Covers	Cycles
GFS	NOAA / NCEP	Global, to 16 days	00, 06, 12, 18 UTC
ECMWF	European Centre	Global, to 10 days	00, 12 UTC
WW3	NOAA / NCEP	Global ocean waves	00, 06, 12, 18 UTC
ICON	Deutscher Wetterdienst	Global	00, 06, 12, 18 UTC

Model charts will appear here once a source is connected.

Surface pressure and precipitation

Wave model charts will appear here once a source is connected.

Significant wave height

Guidance is not the forecast

Models are input, not output. A global model's grid is far coarser than Grenada is wide, so it cannot resolve the difference between the windward and leeward coasts — a difference that dominates the local weather.

The forecaster's job is to interpret that guidance against local behaviour, the observing network and the current satellite picture. Where the published forecast differs from a model chart on this page, the published forecast is the official product.