West Coast OFS

Last cycle 15 Oct 03:00 UTC

wcofs

Data-assimilative ROMS forecast for the U.S. West Coast, resolving the California Current, upwelling filaments and mesoscale eddies.

Model ROMSGrid SGRID (curvilinear)Region US West CoastExtent −145.3583, 18.4418 → −111.5418, 56.4835

Produced by NOAA NOS CO-OPS

Coverage

Jul 27 – Oct 18

Cadence

24h

Forecast

72h

Variables

Grid

1,016×348

Vertical

40σ-levels

Coverageocean_time

span 2.7 months2 days ahead

now

Jul 27, 2026 06:00ZOct 18, 2026 03:00Z

Access

ZarrAvailable

Zarr store on S3 — open directly for best performance.

s3://noaa-nodd-kerchunk-pds/zarr3/wcofs.zarr

WMSAvailable

Rendered map tiles for Leaflet, OpenLayers, QGIS.

https://cloud.data.ioos.us/xreds/datasets/wcofs_zarr3/wms/?service=WMS&request=GetCapabilities

Open in code

python

import xarray as xr

ds = xr.open_zarr(
    "s3://noaa-nodd-kerchunk-pds/zarr3/wcofs.zarr",
    zarr_format=3,
    consolidated=False,
    storage_options={"anon": True},
)

West Coast OFS · Zarr v3, anonymous S3

import intake

cat = intake.open_catalog(
    "https://noaa-nodd-kerchunk-pds.s3.amazonaws.com/zarr3/intake.yml",
)
ds = cat["wcofs"].to_dask()

West Coast OFS · resolved through the shared catalog

Dimensions13

s_rho-1 → 0tracer2s_w-1 → 0boundary4ocean_time616eta_rho1,016xi_rho348eta_psi1,015xi_psi347eta_v1,015xi_v348eta_u1,016xi_u347

Variables82

name	standard name	units	dimensions
temp	sea_water_potential_temperature	Celsius	ocean_times_rhoeta_rhoxi_rho
salt	sea_water_practical_salinity	—	ocean_times_rhoeta_rhoxi_rho
u	sea_water_x_velocity	meter second-1	ocean_times_rhoeta_uxi_u
v	sea_water_y_velocity	meter second-1	ocean_times_rhoeta_vxi_v
w	upward_sea_water_velocity	meter second-1	ocean_times_weta_rhoxi_rho
ubar	barotropic_sea_water_x_velocity	meter second-1	ocean_timeeta_uxi_u
vbar	barotropic_sea_water_y_velocity	meter second-1	ocean_timeeta_vxi_v
zeta	sea_surface_height_above_geopotential_datum	meter	ocean_timeeta_rhoxi_rho
Uwind	surface_x_wind	meter second-1	ocean_timeeta_rhoxi_rho
Vwind	surface_y_wind	meter second-1	ocean_timeeta_rhoxi_rho
Pair	surface_air_pressure	millibar	ocean_timeeta_rhoxi_rho
Cs_r	not declared	—	s_rho
Akt_bak	not declared	meter2 second-1	tracer
Akk_bak	not declared	meter2 second-1
Falpha	not declared	—
Fbeta	not declared	—
Akp_bak	not declared	meter2 second-1
Cs_w	not declared	—	s_w
Fgamma	not declared	—
FSobc_out	not declared	second-1	boundary
Akv_bak	not declared	meter2 second-1
FSobc_in	not declared	second-1	boundary
LnudgeM3CLM	not declared	—
LsshCLM	not declared	—
LnudgeTCLM	not declared	—	tracer
Lm3CLM	not declared	—
LtracerCLM	not declared	—	tracer
Lm2CLM	not declared	—
LtracerSponge	not declared	—	tracer
LnudgeM2CLM	not declared	—
LuvSponge	not declared	—
LtracerSrc	not declared	—	tracer
M2nudg	not declared	day-1
M3nudg	not declared	day-1
M2obc_out	not declared	second-1	boundary
LuvSrc	not declared	—
LwSrc	not declared	—
M3obc_in	not declared	second-1	boundary
M3obc_out	not declared	second-1	boundary
Tcline	not declared	meter
M2obc_in	not declared	second-1	boundary
Tobc_in	not declared	second-1	boundarytracer
Tobc_out	not declared	second-1	boundarytracer
Vstretching	not declared	—
Tnudg	not declared	day-1	tracer
Znudg	not declared	day-1
Zos	not declared	meter
Vtransform	not declared	—
Zob	not declared	meter
dtfast	not declared	second
dt	not declared	second
angle	grid_angle_of_rotation_from_east_to_y	radians	eta_rhoxi_rho
el	not declared	meter
gamma2	not declared	—
f	coriolis_parameter	second-1	eta_rhoxi_rho
grid	not declared	—
h	sea_floor_depth	meter	eta_rhoxi_rho
hc	not declared	meter
mask_psi	land_sea_mask_at_cell_corners	—	eta_psixi_psi
mask_v	land_sea_mask_at_cell_x_edges	—	eta_vxi_v
mask_rho	land_sea_mask_at_cell_center	—	eta_rhoxi_rho
ndefAVG	not declared	—
nAVG	not declared	—
nRST	not declared	—
mask_u	land_sea_mask_at_cell_y_edges	—	eta_uxi_u
ndefHIS	not declared	—
nSTA	not declared	—
nHIS	not declared	—
ndtfast	not declared	—
nl_tnu2	not declared	meter2 second-1	tracer
ntimes	not declared	—
ntsAVG	not declared	—
pn	inverse_grid_y_spacing	meter-1	eta_rhoxi_rho
nl_visc2	not declared	meter2 second-1
rdrg	not declared	meter second-1
rho0	not declared	kilogram meter-3
pm	inverse_grid_x_spacing	meter-1	eta_rhoxi_rho
rdrg2	not declared	—
spherical	not declared	—
theta_b	not declared	—
theta_s	not declared	—
xl	not declared	meter

Attributes39

file

wcofs.t03z.20261015.fields.forecast_0010.nc

format

netCDF-4/HDF5 file

Conventions

CF-1.4, SGRID-0.3

type

ROMS/TOMS history file

title

wcofs forecast RUN in operational mode

var_info

varinfo.yaml

rst_file

wcofs.t03z.20261015.rst.forecast.nc

his_base

wcofs.t03z.20261015.fields.forecast

avg_file

wcofs.avg.nc

sta_file

wcofs.t03z.20261015.stations.forecast.nc

grd_file

wcofs.romsgrid.nc

ini_file

wcofs.t03z.20261015.rst.nowcast.nc

river_file

wcofs.t03z.20261015.river.nc

tide_file

wcofs.roms.tides.nc

frc_file_01

wcofs.t03z.20261015.met.forecast.nc

bry_file_01

wcofs.t03z.20261015.obc.nc

clm_file_01

wcofs.t03z.20261015.clim.nc

nud_file

wcofs.nudgcoef.nc

script_file

./wcofs_ROMS_forecast.in

spos_file

wcofs.stations.in

NLM_TADV

ADVECTION: HORIZONTAL VERTICAL temp: Upstream3 Centered4 salt: Upstream3 Centered4

NLM_LBC

EDGE: WEST SOUTH EAST NORTH zeta: Cha Cha Clo Cha ubar: Fla Fla Clo Fla vbar: Fla Fla Clo Fla u: RadNud RadNud Clo RadNud v: RadNud RadNud Clo RadNud temp: RadNud RadNud Clo RadNud salt: RadNud RadNud Clo RadNud tke: Gra Gra Clo Gra

git_url

https://github.com/NOAA-CO-OPS/2024-NOS-Code-Package_v3.6.0

git_rev

c1e184cd03c2208a7b6924f2ef264d1c9feeb838

svn_url

https://www.myroms.org/svn/src/trunk

svn_rev

1209

code_dir

/lfs/h1/ops/test/packages/nosofs.v3.6.15/sorc/ROMS.fd

header_dir

/lfs/h1/ops/test/packages/nosofs.v3.6.15/include

header_file

wcofs.h

Linux

cpu

x86_64

compiler_system

ftn-intel

compiler_command

/opt/cray/pe/craype/2.7.17/bin/ftn

compiler_flags

-fp-model precise -ip -O3

tiling

008x060

history

ROMS/TOMS, Version 4.2, Thursday - October 15, 2026 - 3:13:11 AM

ana_file

ROMS/Functionals/ana_btflux.h

CPP_options

mode, ADD_FSOBC, ADD_M2OBC, ANA_BSFLUX, ANA_BTFLUX, ASSUMED_SHAPE, AVERAGES, BOUNDARY_ALLREDUCE, BULK_FLUXES, COLLECT_ALLGATHER, CURVGRID, DJ_GRADPS, DOUBLE_PRECISION, EMINUSP, HDF5, LIMIT_STFLX_COOLING, LONGWAVE_OUT, MASKING, MIX_S_TS, MIX_S_UV, MPI, MY25_MIXING, NONLINEAR, NONLIN_EOS, N2S2_HORAVG, POWER_LAW, PROFILE, K_GSCHEME, RADIATION_2D, REDUCE_ALLREDUCE, RI_SPLINES, !RST_SINGLE, SALINITY, STEP2D_LF_AM3, SOLAR_SOURCE, SOLVE3D, SPLINES_VDIFF, SPLINES_VVISC, SSH_TIDES, STATIONS, TS_DIF2, UV_ADV, UV_COR, UV_U3HADVECTION, UV_C4VADVECTION, UV_QDRAG, UV_TIDES, UV_VIS2, VAR_RHO_2D

_xpublish_id

wcofs_zarr3

Source & extent

Model core

ROMS

Grid type

SGRID (curvilinear)

Region

US West Coast

Spatial extent

−145.3583, 18.4418 → −111.5418, 56.4835

Store format

Zarr v3

Source store

s3://noaa-nodd-kerchunk-pds/zarr3/wcofs.zarr