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TempEst-NEXT National Stream Water Temperature Forecasts


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Created: Apr 01, 2026 at 4:22 p.m. (UTC)
Last updated: Jun 24, 2026 at 2:56 p.m. (UTC)
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Content types: CSV Content 
Sharing Status: Public
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Abstract

This resource contains a Jupyter Notebook producing weekly water temperature forecasts for a large sample of rivers nationally. As configured, the emphasis is on smaller rivers to minimize data processing. The resource also contains all required preliminary data and an archive of weekly forecasts, which will be updated as more forecasts are run over time. These data and related items of information have not been formally disseminated by NOAA, and do not represent any agency determination, view, or policy.

As of June 2026, the forecasts are still for one week (i.e., 1-7 day lead), but are run daily. There may be a lag of a few days before they are actually uploaded here.

Forecasts prior to June 18, 2026 appear to have been using a buggy pre-trained model which resulted in strange predictions for the mountains. This has been fixed.

Forecasts beginning June 24, 2026 use a larger sample of approx. 3600 sites.

Included files and directories:

- forecast.ipynb: runs the forecasts. The workflow should be fully automatic. May be slightly out-of-date with respect to display tweaks (GitHub version will be up-to-date: https://github.com/mines-ciroh/natl-temp-forecast) but any technical changes will be uploaded here.
- coefs_hrrr.pickle: pre-fitted TempEst-NEXT model.
- README.md: general information.
- requirements.txt: pip requirements file.
- forecast_points.json: GeoJSON containing forecast locations.
- full_forecasts: archive of actual forecast results in CSV format. See README.md for details.
- forecasts: site-specific forecasts, including the GFS-forecasted daily max air temperature.
- hist_data: GridMet-based preliminary site data.
- hrrr_data: sample of HRRR forecast archives for a subset of sites, used to adjust climatology.
- final_hist: corrected historical data used for the model.

Directories are uploaded as zip archives, except for the forecast archive.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Contiguous United States
North Latitude
49.0000°
East Longitude
-68.0000°
South Latitude
26.0000°
West Longitude
-124.0000°

Temporal

Start Date:
End Date:

Content

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
National Oceanic and Atmospheric Administration Cooperative Institute for Research to Operations in Hydrology NA22NWS4320003

How to Cite

Philippus, D. (2026). TempEst-NEXT National Stream Water Temperature Forecasts, HydroShare, http://www.hydroshare.org/resource/b8852529788a437a8d697e9b0435b99a

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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