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Site-specific weather files and data (historical, current, and future)


Altostratus Inc. creates pin-point, site-specific weather files and high-resolution weather data (e.g., 200 - 20 m) for various applications, including for energy modeling, analysis, and forecasting, based on a site's specific land-cover characteristics, thermo-physical properties, and geometrical attributes. Fine-scale microclimate zones are also developed for longer-term energy and environmental planning. Past, current, and future weather data are created based on observations from high-density monitoring networks and advanced, hyper-high-resolution atmospheric modeling.  

  • Sample high-resolution EPW weather files are available for testing (see example below for the San Francisco Bay Area).
  • Contact us to access and test EPW files or, for a fee, create site-specific weather data / weather files for your project or location of interest.


Some highlights:
  • Advanced high-resolution atmospheric models and parameterizations tailored specifically to desired locations and sites (simulations are specific to site)
  • Meteorological observations from mesonet and urbanet to augment the model
  • Detailed remote-sensing and in-situ land-use and site characterizations
  • Site-specific weather files formatted for input to building energy models, including for historical, probabilistic, actual, and future meteorological years
  • Fine-scale microclimate zoning for planning and energy forecasting as an alternative to current, coarse, airport-based climate zones
  • Weather files/data for historical, actual, current and future climates accounting for fine-scale intra-urban variations in microclimates
  • Current and future land-use conditions and projections accounted for in dynamical downscaling of climate models
  • Code-compliance and LEED-related modeling and applications.

The following article (pdf file link, below) provides a brief summary of methods, models, data, and weather-file samples (for the Sacramento, California area as an example). A version of this article also appeared in the IBPSA World Newsletter, External link opens in new tab or windowVol. 30, No. 2, pp. 29-41. Contact us for more information or if interested in developing weather data that are specific to your location or project.



Altostratus IBPSA World article 2.3MB


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