National Weather Service
|National Operational Hydrologic
Remote Sensing Center
NOAA's Source for Snow Information
The National Operational Hydrologic Remote Sensing Center provides comprehensive snow observations, analyses, data sets and map products for the Nation.
Get the latest in-depth analyses of national and regional snow conditions.
Explore our online GIS for comprehensive snow information.
3D visualization - it's a key to understanding the National Snow Analyses.
The NOHRSC measures snow water equivalent and soil moisture using gamma radiation remote sensing. This unique observing system includes two low-flying aircraft to conduct surveys in 31 states, including Alaska, as well as in 8 Canadian provinces. Four NOAA Corps officers pilot the aircraft and operate the remote sensing systems. The data are incorporated into the National Snow Analyses.
You'll find survey data, schedules, flight line locations, aerial photos, and information about the program here.
The areal extent of snow cover is mapped daily using polar-orbiting and geostationary satellite imagery. Maps are provided for the U.S. and the northern hemisphere.
Download gridded National Snow Analyses data sets for geospatial applications.
Information from the National Snow Analyses is summarized by basins and by basin elevation zones, and is provided here in Standard Hydrologic Exchange Format (SHEF).
SRUS43 KMSR 041050 SCVPTR .BR MSP 051104 DM110406/DC11041050 /SDIPZ : :------------------------------------------------------- :National Weather Service :Office of Climate, Water, and Weather Services :National Operational Hydrologic Remote Sensing Center :Chanhassen, Minnesota (952) 361-6610 :------------------------------------------------------- : :Modeled Snow Depth Over Land by Elevation Zones :Modeled 05110406 : :LITTLE PRICKLY PEAR CR. AT WOLF CR MT 2801 1.5 : Avg (inches) Entire Basin : 1.5 ; Avg (inches) Base to 6998' : 2.2 ; Avg (inches) 6998' to Top : :GIBSON RES. MT 2806 1.9 : Avg (inches) Entire Basin : 1.7 ; Avg (inches) Base to 6998' : 2.3 ; Avg (inches) 6998' to Top : :TETON RIVER NR DUTTON MT 2820 0.0 : Avg (inches) Entire Basin : 0.0 ; Avg (inches) Base to 6998' : 0.3 ; Avg (inches) 6998' to Top :
Learn about the science and technology at the NOHRSC. From our airborne observing systems to the physics in our models, from our IT architecture to snow economics, learn how we do things and why. Download papers, technical reports, and presentations.
The NOHRSC provides and maintains the NWS Integrated Hydrologic Automated Basin Boundary System (IHABBS) GIS database to support river and flood forecasting throughout the nation. Basin boundary data sets and RFC boundaries are provided here in shapefiles that have been tarred and gzipped. Data sets used in our Interactive Snow Information system are also available here, including larger scale basins, rivers and streams, geopolitical boundaries, cities, roads and flight lines for the NOHRSC Airborne Snow Survey program.
View Landsat and MODIS satellite imagery generated for special projects.
Snow Analysis Highlights
Friday, September 30, 2022Snow Model Status: The model analysis is out to Friday, 2022-09-30 0000 UTC. The daily model forecast is out to Sunday, 2022-10-02 0600 UTC. more ...
Website NewsThe National Snowfall Analysis, an observation-based, gridded estimate of recent snowfall, is now an operational product. Stand-alone imagery, seasonal totals, and data downloads in several formats are available in the National Snowfall Analysis section of the website. Products are also available in the the NOHRSC Interactive Snow Information section of the website. For more information, see the NWS Public Information Statement PNS22-05. For product questions, contact . For technical questions, contact .