NorWeST Observed Stream Temperature Points


Description Spatial Attributes

Theme: stream, water, temperature, hydrography

These data represent stream temperature observation locations for a portion of a larger study area known as the Great Northern Landscape Conservation Cooperative (GNLCC) These data were collected and processed as part of the NorWeST stream temperature project

These thermograph locations and the attendant temperature observations were used as the baseline data for the NorWeST stream temperature modeling project. As a result, modeled temperatures will be most reliable in areas with the greatest density of thermographs. 

These data reside in ESRI shapefile format, ArcGIS version 9.3. The point shapefile extents correspond to NorWeST production units, which generally relate to 6 digit (3rd code) hydrologic unit codes (HUCs). 

The points in this shapefile represent the locations of in-stream thermographs (temperature sensors). These point locations have been modified slightly from their original locations as they were repositioned to overlay with 1:100,000 scale NHDPlus stream lines. ( (USEPA and USGS, 2010) 

These points are intended to be used with a table (.xlsx format) of summarized temperature observations. The points in this shapefile may be linked to the temperature observations through a field in the attribute table called: OBSPRED_ID.


OBSPRED_ID - Unique ID assigned to each temperature deployment. A deployment is a site + year combination of data. Individual sites have multiple deployments when temperature monitoring occurs in more than one year.

PERMA_FID - ID given to a single temperature sensor site. A site may contain multiple years of data.

SampleYear - The year that temperature data were recorded at the location.

UOM - Unit of measure of the original data (DegC = Celcius; DegF=Fahrenheit)

GNIS_NAME - The stream name from the Geographic Names Information System database

Source - The name of the organization that contributed the stream temperature data

Reference Cited:

USEPA and USGS, 2010. NHDPlus Version 1 (NHDPlusV1) User Guide, available online at

These data were originally intended to be used for managing biological resources and predicting species distributions that are affected by August mean stream temperature.

Note when joining tables that the observed temperature point shapefile for an area may not exactly match the observed database also available for download. Some contributors have chosen not to distribute their data, but have shared their thermograph locations.

Supplementary Information


Status of the data

Time period for which the data is relevant

Publication Information

Data storage and access information

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