In Wildfires

As we speak, firefighters in Northern California are battling hundreds of blazes across 775,000 acres, sparked by dry lightning strikes.

Unfortunately, disastrous wildfire seasons in our state have become all too common, and conditions are ripe for rapid wildfire spread. Hot summers with little precipitation bring about drought conditions, increasing amounts of dead trees act as fire fuel, and more extreme weather events related to climate change are occurring.

The state of California at a critical inflection point. In order to mitigate the devastating effects of wildfires, in 2019, we helped form The Pyregence Consortium. The mission of the consortium is to better equip everyone effected by wildfires, from concerned citizens, to utility companies and state agencies, with the information they need to reduce wildfire risk.

Funded by a grant from the California Energy Commission, the consortium is comprised of experts in wildfire, forestry, weather and climate change from 18 institutions across academic, private consultancy and government sectors. Together, the members are advancing two key goals:

The advancement of fire behavior science through cutting-edge research being performed on forest fuels, fire physics, climate and weather dynamics: Members of the consortium are developing a new system for measuring forest fuels, and driving research on the role of weather and fire physics on wildfire spread.

Delivery of the “next generation” of wildfire forecasting tools: Building on fire behavior research, the group will refine model inputs to integrate previously underrepresented factors, including embercast caused ignitions, forest fuel characteristics, large-scale tree mentality, and fire weather feedbacks.

In light of recent events, the consortium is making its first forecasting tool available. While still in its beta stage, the Pyregence forecasting tool is a free, online tool that can be used by members of the public, and people within organizations interested in understanding fire spread. Users can view active fires burning in CA, and see where they’re expected to spread over the course of 48 hours. 

Two important notes about the tool:

  • Our tool is still in ‘beta’ stage, meaning we’re still testing and making refinements. However, given the intense fire activity in California, we’re making it available to users in order to provide an important data set to factor into decision-making*.

  • At this time, our forecasting tool is available solely on Google Chrome desktop.

The Pyregence tool predicts active fire spread over the course of 48 hours.

For first-time users, below is a three-step tutorial for using the Pyregence forecasting tool.

1) We offer three forecasts: “Fire Weather”, “Active Fire Forecast”, and “Risk Management.” Select the middle tab, “Active Fire Forecast.”

2) Next, select from the list of active fires in the dropdown under “Fire Name.” 

3) Hit the “play” button on the bottom of the screen to view forecasted fire spread. You may also use the drop down menu to adjust the speed (.5, 1x, 2x or 5x). 



The Pyregence forecasting tool was developed by a team led by Dr. Chris Lautenberger of Reax Engineering that includes Maria Theodori, also of Reax Engineering, Dr. Gary Johnson and Matt Spencer of Spatial Informatics Group, Dr. Dave Marvin of Salo Sciences, and Dr. David Saah, Professor at the University of San Francisco.

We welcome your feedback. Contact us directly at


Your use of this web site is undertaken at your sole risk. This site is available on an “as is” and “as available” basis without warranty of any kind. We do not warrant that this site will (i) be uninterrupted or error-free; or (ii) result in any desired outcome. We are not responsible for the availability or content of other services, data or public information that may be used by or linked to this site. To the fullest extent permitted by law, the Pyregence Consortium, and each and every individual, entity and collaborator therein, hereby disclaims (for itself, its affiliates, subcontractors, and licensors) all representations and warranties, whether express or implied, oral or written, with respect to this site, including without limitation, all implied warranties of title, non-infringement, quiet enjoyment, accuracy, integration, merchantability or fitness for any particular purpose, and all warranties arising from any course of dealing, course of performance, or usage of trade.

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