Products based on an ensemble of forecasts providing an estimate of the reliability of a single forecast. The following sub-sets are available from the ENS-WAM:


Dissemination schedule

IV-i: Wave fields

12 UTC based forecast time Time available 00 UTC base forecast time Time available
Forecast step 0 19:40 Forecast step 0 07:40
Forecast day 10 20:20 Forecast day 10 08:20
Forecast day 15 20:40 Forecast day 15 08:40
Derived products 0 to D+10 20:21 Derived products 0 to D+10 08:21
Derived products D+11-D+15 20:41 Derived products D+11-D+15 08:41

IV-ii: Probabilities

12 UTC based Forecast time Time Available 00 UTC based Forecast time Time available
Forecast step 0 19:40 Forecast step 0 07:40
Forecast Day 10 20:20 Forecast Day 10 08:20
Forecast Day 15 20:40 Forecast Day 15 08:40
Derived products 0 to D+10 20:21 Derived products 0 to D+10 08:21
Derived products D+10 to D+15 20:40 Derived products D+10 to D+15 08:40

IV-iii: Extreme Forecast Index (EFI)  & Shift of Tails (SOT)

12 UTC based forecast time Time available 00 UTC base forecast time Time available
Forecast step 0 19:40 Forecast step 0 07:40
Forecast day 10 20:20 Forecast day 10 08:20
Forecast day 15 20:40 Forecast day 15 08:40
Derived products 0 to D+10 20:21 Derived products 0 to D+10 08:21
Derived products D+11-D+15 20:41 Derived products D+11-D+15 08:41

Parameters

All tables are sortable by column. Use your browser search for specific parameters.

  Terms convention
(inv) Invariant field. If requested these parameters can be provided free of charge

IV-i: Wave fields

Product resolution: 0.25° x 0.25° lat/long grid or any multiple thereof (global or sub-area)

  Forecast time step Base time
T+0 to T+144 3-hourly 00 UTC and 12 UTC
T+150h to T+360h 6-houlry (unless otherwise specified) 00 UTC and 12 UTC
Short name Long name Description Unit ID Additional information
2DFD 2D wave spectra (single) Wave variance spectrum archived as a field for each discretized frequency and directional bin (what is actually encoded is log10 of the variance spectrum) m**2 s radian**-1 140251

Not for forecast step 0

30 frequencies 24 directions

BFI Benjamin-Feir index Benjamin-Feir index dimensionless 140253  
CDWW Coefficient of drag with waves Atmospheric drag coefficient  influenced by the presence of waves dimensionless 140233  
DWI 10 metre wind direction Neutral 10m wind direction for all wave model sea points degrees 140249  
DWPS Wave spectral directional width for swell Spectral width of the total swell spectrum dimensionless 140228  
DWWW Wave spectral directional width for wind waves Spectral width of the windsea spectrum dimensionless 140225  
HMAX  Maximum individual weight  Estimation value of the maximum individual wave height 140218  
MDTS  Mean direction of total swell  Mean direction computed from the total swell spectrum degrees  140238  
MDWW  Mean direction of wind waves  Mean direction computed from the windsea spectrum degrees  140235  
MP1 Mean wave period based on first moment Mean wave direction computed using the third most energetic partition of the swell spectrum s 140220  
MP2  Mean wave period based on second moment  Mean wave period computed using the second frequency moment of the spectrum 140221  
MPTS  Mean period of total swell  Mean wave period computed using the reciprocal frequency moment of the total swell spectrum 140239  
MPWW  Mean period of wind waves  Mean wave period computed using the reciprocal frequency moment of the windsea spectrum 140236  
MSQS Mean square slope of waves Mean square slope computed from the full wave spectrum dimensionless 140244  
MWD  Mean wave direction  Mean wave direction computed using  the full spectrum degrees  140230  
MWD1 Mean wave direction of first swell partition Mean wave direction computed using the first most energetic partition of the swell spectrum degrees 140122  
MWD2 Mean wave direction of second swell partition Mean wave direction computed using the second most energetic partition of the swell spectrum degrees 140125  
MWD3 Mean wave direction of third swell partition Mean wave direction computed using the third most energetic partition of the swell spectrum degrees 140128  
MWP  Mean wave period  Mean wave period computed using the reciprocal frequency moment of the full spectrum 140232  
MWP1 Mean wave period of first swell partition Mean wave period computed using the reciprocal frequency moment of the first most energetic partition of the swell spectrum s 140123  
MWP2 Mean wave period of second swell partition Mean wave period computed using the reciprocal frequency moment of the second most energetic partition of the swell spectrum s 140126  
MWP3 Mean wave period of third swell partition Mean wave period computed using the reciprocal frequency moment of the third most energetic partition of the swell spectrum s 140129  
P1PS Mean wave period based on first moment for swell Mean wave period computed using first frequency moment of the total swell spectrum s 140226  
P1WW Mean wave period based on first moment for wind waves Mean wave period computed using first frequency moment of the wind sea spectrum s 140223  
P2PS  Mean wave period based on second moment for swell  Spectral mean wave period computed using second frequency moment of the total swell spectrum 140227  
P2WW  Mean wave period based on second moment for wind waves  Mean wave period computed using second frequency moment of the windsea spectrum 140224  
PHIAW  Normalized energy flux into waves  Energy flux from wind to waves normalised by the product of the air density anf the cube of air side friction velocity dimensionless  140211  
PHIOC  Normalized energy flux into ocean  Energy flux from wind to ocean normalised by the product of the air density anf the cube of air side friction velocity dimensionless  140212  
PP1D  Peak period of 1D-spectra  Period corresponding to the peak of the one-dimensional wave spectrum 140231  
RHOAO Air density over the oceans air density over the oceans as derived from the lowest model temperature, specific humidity and pressure of the atmospheric model over all wave model sea points
NOTE: because it is produced as a wave model output, it is only defined over the ocean
kg m**-3 140209  
SHTS  Significant height of total swell  Period corresponding to the peak of the one-dimensional wave spectrum 140237  
SHWW  Significant height of wind waves  Significant wave height for the windsea wave spectrum 140234  
SWH  Significant height of combined wind waves and swell  Significant wave height for the full wave spectrum 140229  
SWH1 Significant wave height of first swell partition Significant wave height for the first most energetic partition of the m 140121  
SWH2 Significant wave height of second swell partition Significant wave height for the second most energetic partition of t m 140124  
SWH3 Significant wave height of third swell partition Significant wave height for the third most energetic partition of the m 140127  
TAUOC  Normalized stress into ocean  Momentum flux from wind to ocean normalised by the product of the air density anf the square of air side friction velocity dimensionless  140214  
TMAX  Period corresponding to maximum individual wave height  Period corresponding to maximum individual wave height 140217  
UST  U-Component stokes drift  U-component stokes drift m s**-1  140215  
VST  V-Component stokes drift  V-component stokes drift m s**-1  140216  
WDW Wave spectral directional width Directional width of the full wave spectrum dimensionless 140222  
WIND 10 metre wind speed Neutral 10m wind speed for all wave model sea points m s**-1 140245  
WMB (inv)  Model Bathymetry  Water depth used by the wave model 140219  
WSK Wave spectral kurtosis Kurtosis of the sea surface elevation due to waves dimensionless 140252  
WSP Wave spectral peakedness Peakedness factor of the full wave  spectrum dimensionless 140254  
WSS Wave Spectral Skewness Skewness of the sea surface elevation due to waves dimensionless 140207  
WSTAR Free convective velocity over the oceans This parameter is used to prescribe the level of wind gustiness which influence wave growth. It is calculated using parameters from the atmospheric model:

w* = u* {1/kappa (Zi/(-L))} ^1/3

where
u* is the friction velocity
kappa is the von Karman constant
Zi is the height of the lowest inversion
L is the Monin-Obukhov length
NOTE: because it is produced as a wave model output, it is only defined over the ocean
m s**-1 140208  

IV-ii: Probabilities

Product resolution: 0.25° x 0.25° lat/long grid or any multiple thereof (global or sub-area)

Instantaneous events

  Forecast time step Base time
T+24 to T+360h 12-hourly 00 UTC and 12 UTC

Averaged events

Forecast ranges

Base time

2 -day period covering 120h < T ≤ 168h

00 UTC and 12 UTC

3 -day period covering 168h < T ≤ 240h

00 UTC and 12 UTC

5 -day period covering 120h < T ≤ 240h

00 UTC and 12 UTC

5-day periods: 240h < T ≤ 360h

00 UTC and 12 UTC

Short name Long name Description Unit ID Additional information
MWPG10 Mean wave period of at least 10 s Probability % 131079  
MWPG12 Mean wave period of at least 12 s Probability % 131080  
MWPG15 Mean wave period of at least 15 s Probability % 131081  
MWPG8 Mean wave period of at least 8 s Probability % 131078  
SWHG2  Significant wave height of at least 2m  Probability 131074  
SWHG4  Significant wave height of at least 4m  Probability 131075  
SWHG6  Significant wave height of at least 6m  Probability 131076  
SWHG8  Significant wave height of at least 8m  Probability 131077  

IV-iii: Extreme Forecast Index (EFI) & Shift of Tails (SOT)

Product resolution: 0.25° x 0.25° lat/long grid or any multiple thereof (global or sub-area)

1-day forecast ranges

Base times
00-24, 24-48, 48-72,72-96, 96-120, 120-144, 144-168 00 UTC
12-36, 36-60, 60-84, 84-108, 108-132, 132-156, 156-180 12 UTC

MARS ABBREVIATION LONG NAME UNIT PARAMETER ID PERCENTILE (SOT only)
MAXSWHI Maximum of significant wave height index

(-1 to 1)

132216 90th

Last updated: 14 March 2016