Cook Inlet OFS

Last cycle 15 Oct 18:00 UTC

ciofs

Operational ROMS nowcast/forecast for Cook Inlet, Alaska, capturing extreme tides, currents, temperature and salinity on a high-resolution curvilinear grid.

Model ROMSGrid SGRID (curvilinear)Region AlaskaExtent −156.4853, 56.7005 → −148.9251, 61.5248

Produced by NOAA NOS CO-OPS

Coverage

Jul 28 – Oct 17

Cadence

Forecast

48h

Variables

Grid

1,044×724

Vertical

30σ-levels

Coverageocean_time

span 2.7 months39 h ahead

now

Jul 28, 2026 13:00ZOct 17, 2026 18:00Z

Access

ZarrAvailable

Zarr store on S3 — open directly for best performance.

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

WMSAvailable

Rendered map tiles for Leaflet, OpenLayers, QGIS.

https://cloud.data.ioos.us/xreds/datasets/ciofs_zarr3/wms/?service=WMS&request=GetCapabilities

Open in code

python

import xarray as xr

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

Cook Inlet OFS · Zarr v3, anonymous S3

import intake

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

Cook Inlet OFS · resolved through the shared catalog

Dimensions13

tracer2s_w-1 → 0boundary4s_rho-1 → 0ocean_time1,707eta_rho1,044xi_rho724eta_psi1,043xi_psi723eta_v1,043xi_v724eta_u1,044xi_u723

Variables77

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
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
Akk_bak	not declared	meter2 second-1
Akt_bak	not declared	meter2 second-1	tracer
Cs_w	not declared	—	s_w
Akv_bak	not declared	meter2 second-1
FSobc_in	not declared	second-1	boundary
Cs_r	not declared	—	s_rho
FSobc_out	not declared	second-1	boundary
Fbeta	not declared	—
Lm3CLM	not declared	—
Fgamma	not declared	—
LnudgeM3CLM	not declared	—
LnudgeM2CLM	not declared	—
Lm2CLM	not declared	—
Falpha	not declared	—
LtracerCLM	not declared	—	tracer
LnudgeTCLM	not declared	—	tracer
Akp_bak	not declared	meter2 second-1
LuvSrc	not declared	—
LsshCLM	not declared	—
M2nudg	not declared	day-1
LwSrc	not declared	—
M2obc_out	not declared	second-1	boundary
M2obc_in	not declared	second-1	boundary
M3obc_in	not declared	second-1	boundary
Tcline	not declared	meter
M3obc_out	not declared	second-1	boundary
M3nudg	not declared	day-1
Tobc_out	not declared	second-1	boundarytracer
Tobc_in	not declared	second-1	boundarytracer
Tnudg	not declared	day-1	tracer
Vstretching	not declared	—
Zos	not declared	meter
Znudg	not declared	day-1
angle	grid_angle_of_rotation_from_east_to_y	radians	eta_rhoxi_rho
Vtransform	not declared	—
dt	not declared	second
Zob	not declared	meter
dtfast	not declared	second
LtracerSrc	not declared	—	tracer
h	sea_floor_depth	meter	eta_rhoxi_rho
grid	not declared	—
el	not declared	meter
gamma2	not declared	—
hc	not declared	meter
f	coriolis_parameter	second-1	eta_rhoxi_rho
mask_psi	land_sea_mask_at_cell_corners	—	eta_psixi_psi
mask_v	land_sea_mask_at_cell_x_edges	—	eta_vxi_v
mask_u	land_sea_mask_at_cell_y_edges	—	eta_uxi_u
nSTA	not declared	—
mask_rho	land_sea_mask_at_cell_center	—	eta_rhoxi_rho
nRST	not declared	—
nHIS	not declared	—
ndefHIS	not declared	—
ndtfast	not declared	—
ntimes	not declared	—
pm	inverse_grid_x_spacing	meter-1	eta_rhoxi_rho
rdrg2	not declared	—
rdrg	not declared	meter second-1
pn	inverse_grid_y_spacing	meter-1	eta_rhoxi_rho
rho0	not declared	kilogram meter-3
spherical	not declared	—
theta_s	not declared	—
wetdry_mask_psi	wet_dry_mask_at_cell_corners	—	ocean_timeeta_psixi_psi
theta_b	not declared	—
wetdry_mask_rho	wet_dry_mask_at_cell_center	—	ocean_timeeta_rhoxi_rho
wetdry_mask_v	wet_dry_mask_at_cell_x_edges	—	ocean_timeeta_vxi_v
xl	not declared	meter
wetdry_mask_u	wet_dry_mask_at_cell_y_edges	—	ocean_timeeta_uxi_u

Attributes36

file

ciofs.t18z.20261015.fields.forecast_0041.nc

format

netCDF-4/HDF5 file

Conventions

CF-1.4, SGRID-0.3

type

ROMS/TOMS history file

title

ciofs forecast RUN in operational mode

var_info

varinfo.yaml

rst_file

ciofs.t18z.20261015.rst.forecast.nc

his_base

ciofs.t18z.20261015.fields.forecast

sta_file

ciofs.t18z.20261015.stations.forecast.nc

grd_file

ciofs.romsgrid.nc

ini_file

ciofs.t18z.20261015.rst.nowcast.nc

river_file

ciofs.t18z.20261015.river.nc

tide_file

ciofs.roms.tides.nc

frc_file_01

ciofs.t18z.20261015.met.forecast.nc

bry_file_01

ciofs.t18z.20261015.obc.nc

script_file

./ciofs_ROMS_forecast.in

spos_file

ciofs.stations.in

NLM_TADV

ADVECTION: HORIZONTAL VERTICAL temp: HSIMT HSIMT salt: HSIMT HSIMT

NLM_LBC

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

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

ciofs.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

024x034

history

ROMS/TOMS, Version 4.2, Thursday - October 15, 2026 - 7:01:51 PM

ana_file

ROMS/Functionals/ana_btflux.h, ROMS/Functionals/ana_rain.h, ROMS/Functionals/ana_stflux.h

CPP_options

mode, ADD_FSOBC, ADD_M2OBC, ANA_BSFLUX, ANA_BTFLUX, ANA_RAIN, ANA_SSFLUX, ASSUMED_SHAPE, ATM_PRESS, BOUNDARY_ALLREDUCE, BULK_FLUXES, COLLECT_ALLGATHER, CURVGRID, DJ_GRADPS, DOUBLE_PRECISION, HDF5, LIMIT_BSTRESS, LIMIT_STFLX_COOLING, KANTHA_CLAYSON, LONGWAVE_OUT, MASKING, MPI, MY25_MIXING, NONLINEAR, NONLIN_EOS, NO_LBC_ATT, N2S2_HORAVG, PERFECT_RESTART, POWER_LAW, PROFILE, K_GSCHEME, RADIATION_2D, REDUCE_ALLREDUCE, !RST_SINGLE, SALINITY, STEP2D_LF_AM3, SOLAR_SOURCE, SOLVE3D, SSH_TIDES, STATIONS, UV_ADV, UV_COR, UV_U3HADVECTION, UV_C4VADVECTION, UV_LOGDRAG, UV_TIDES, VAR_RHO_2D, WET_DRY

_xpublish_id

ciofs_zarr3

Source & extent

Model core

ROMS

Grid type

SGRID (curvilinear)

Region

Alaska

Spatial extent

−156.4853, 56.7005 → −148.9251, 61.5248

Store format

Zarr v3

Source store

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