SNODAS snow water equivalent and snow depth#

snodas · theme snow · live

NOHRSC Snow Data Assimilation System daily 1 km snow water equivalent, snow depth, melt, sublimation and snowpack temperature over the CONUS (masked) or the wider modelling domain (unmasked), 2003-10 onward.

import easysnowdata as esd

aoi = (-121.94, 46.72, -121.54, 46.99)   # Mount Rainier
data = esd.snow.snodas.load(aoi, time="2024-03")

No account needed for the default route

source="nsidc" is open. source="gee-climate-engine" needs earthengine — see the credentials page.

Sources#

2 routes serve this product; the first is the default and source= picks another. The return contract is the same either way.

source

provider

credentials

resolution

extent

temporal

latency

notes

nsidc (default)

raster_http

none

1000 m

CONUS (masked) / North America (unmasked)

2003-10/present

~1 day

authoritative NOHRSC archive: one tar per day of gzipped flat-binary grids plus text headers; no credentials, no cloud-native mirror exists

gee-climate-engine

gee

earthengine

1000 m

CONUS

2003-10/present

~1 day

Climate Engine’s community re-hosting: analysis-ready and lazy, but a non-authoritative mirror with only SWE and snow depth

Where each route points#

nsidc — NSIDC G02158 (direct) live

https://noaadata.apps.nsidc.org/NOAA/G02158/{region}/YYYY/MM_Mon/SNODAS_YYYYMMDD.tar

gee-climate-engine — Earth Engine (Climate Engine) live

projects/earthengine-legacy/assets/projects/climate-engine/snodas/daily

Variables#

variable

units

dtype

nodata

categorical

SWE

m

float32

—

no

snow_depth

m

float32

—

no

snow_melt

m

float32

—

no

Provenance#

Licence · Public domain (US government data)

DOI · 10.7265/N5TB14TC

Cite the data as

National Operational Hydrologic Remote Sensing Center (2004). Snow Data Assimilation System (SNODAS) Data Products at NSIDC, Version 1. Boulder, Colorado USA. NSIDC.

Documentation

Loader · easysnowdata.snow.snodas.load