GribStream

IFS Wave 0.1°

GribStream Code: ifswave0p1

IFS 0.1° UTC forecast lead times: 3h steps to 144h, then 6h steps to 360h for 00 and 12 UTC
ifswave0p1 · UTC · 3h / 6h · 06/18: +0…144h · 00/12: +0…360h

ECMWF IFS on a global 0.1° output grid. This finer distribution comes from the same forecast as the 0.25° products and follows it by about two hours.

Atmospheric products include the published surface fields and all pressure levels. Wave products provide marine guidance. Use the inventory below for exact parameter and level selectors. Accumulations, rates and interval extrema retain their native definitions and units.

Four cycles daily: 00, 06, 12 and 18 UTC. The first 06 UTC run contains three-hour steps from +0 to +144h. ECMWF specifies three-hour steps through +144h and six-hour steps from +150 to +360h for 00/12 UTC. Run time is initialization time, not publication time.

The upstream 0.1° record begins on 20 October 2026 at 06 UTC. Earlier IFS history is available in the separate 0.25° datasets. Query availability depends on indexed files that remain readable upstream.

Query exact selectors through the runs and timeseries endpoints. Ensemble datasets contain members 1–50; the control is the corresponding deterministic dataset. Missing ocean or land values remain missing.

/api/v2/ifswave0p1/runs · /api/v2/ifswave0p1/timeseries

  • Archive begins: 2026-10-20

    • Parameters

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    cdww –Coefficient of drag with waves (dimensionless)
    1 variant

    Parameter ID 140233

    ECMWF param DB

    Wave-model drag coefficient describing the surface stress coupling between winds and waves.

    • Published with ECMWF wave-model output and useful for diagnosing air-sea momentum exchange.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"cdww","level":"sfc","info":""}
    h1012 –Significant wave height of all waves with periods from 10 to 12 seconds (m)
    1 variant

    Parameter ID 140114

    ECMWF param DB

    Significant wave height contributed by waves with periods from 10 to 12 seconds.

    • Period-band wave height fields help separate sea states by wave-period class.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"h1012","level":"sfc","info":""}
    h1214 –Significant wave height of all waves with periods from 12 to 14 seconds (m)
    1 variant

    Parameter ID 140115

    ECMWF param DB

    Significant wave height contributed by waves with periods from 12 to 14 seconds.

    • Period-band wave height fields help separate sea states by wave-period class.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"h1214","level":"sfc","info":""}
    h1417 –Significant wave height of all waves with periods from 14 to 17 seconds (m)
    1 variant

    Parameter ID 140116

    ECMWF param DB

    Significant wave height contributed by waves with periods from 14 to 17 seconds.

    • Period-band wave height fields help separate sea states by wave-period class.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"h1417","level":"sfc","info":""}
    h1721 –Significant wave height of all waves with periods from 17 to 21 seconds (m)
    1 variant

    Parameter ID 140117

    ECMWF param DB

    Significant wave height contributed by waves with periods from 17 to 21 seconds.

    • Period-band wave height fields help separate sea states by wave-period class.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"h1721","level":"sfc","info":""}
    h2125 –Significant wave height of all waves with periods from 21 to 25 seconds (m)
    1 variant

    Parameter ID 140118

    ECMWF param DB

    Significant wave height contributed by waves with periods from 21 to 25 seconds.

    • Period-band wave height fields help separate sea states by wave-period class.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"h2125","level":"sfc","info":""}
    h2530 –Significant wave height of all waves with periods from 25 to 30 seconds (m)
    1 variant

    Parameter ID 140119

    ECMWF param DB

    Significant wave height contributed by waves with periods from 25 to 30 seconds.

    • Period-band wave height fields help separate sea states by wave-period class.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"h2530","level":"sfc","info":""}
    mp2 –Mean zero-crossing wave period (s)
    1 variant

    Parameter ID 140221

    ECMWF param DB

    Mean time between sea-surface crossings of mean sea level.

    • Derived from the two-dimensional wave spectrum that combines waves of different heights, lengths, and directions.
    • Useful with wave height to estimate time under water for coastal structures.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"mp2","level":"sfc","info":""}
    mwd –Mean wave direction (Degree true)
    1 variant

    Parameter ID 140230

    ECMWF param DB

    Mean direction of ocean surface waves averaged over the wave spectrum.

    • Accounts for both wind-sea and swell components.
    • Direction is in degrees true (0 = from north, 90 = from east).
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"mwd","level":"sfc","info":""}
    mwp –Mean wave period (s)
    1 variant

    Parameter ID 140232

    ECMWF param DB

    Average time between successive wave crests based on the wave spectrum.

    • Accounts for both wind-sea and swell components.
    • Useful for sea state assessments and marine engineering.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"mwp","level":"sfc","info":""}
    pp1d –Peak wave period (s)
    1 variant

    Parameter ID 140231

    ECMWF param DB

    Period of the most energetic ocean waves associated with the spectral peak.

    • Computed from the reciprocal of the frequency at the peak of the wave spectrum.
    • Includes contributions from both wind-sea and swell.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"pp1d","level":"sfc","info":""}
    swh –Significant height of combined wind waves and swell (m)
    1 variant

    Parameter ID 140229

    ECMWF param DB

    Average height of the highest one-third of wind + swell waves.

    • Defined as four times the square root of the spectral variance (integral over all frequencies and directions).
    • Used to assess sea state and structural loading offshore.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"swh","level":"sfc","info":""}
    wmb –Model bathymetry (m)
    1 variant

    Parameter ID 140219

    ECMWF param DB

    Bathymetry used by the ECMWF wave model.

    • This is a model-grid field used by the wave model, not an observed water-depth analysis.
    Level Info Horizon Selector
    sfc 0h-360h
    {"name":"wmb","level":"sfc","info":""}

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