Revision History for: FS2012-3121 First Published September 2012, authored by: Jeff Eidenshink, Stephen Howard Title: United States Geological Survey Fire Science—Fire Danger Monitoring and Forecasting Revised July 2015: Text and graphics were revised because the original version discussed products that are no longer produced or available on the Fire Danger Monitoring and Forecasting Web site: http://firedanger.cr.usgs.gov/. Only minor revisions were made to the text: The fourth paragraph was modified to remove references to outdated products (i.e. “…7 day forecasts for all federal lands of the distribution of number of ignitions, number of fires above a given size” and “conditional probabilities of fires growing larger than a specified size.”). This was replaced with: “…7-day forcasts of: the FPI, the expected number of large fire per Predictive Service Area, and the probability for a fire to exceed 100 acres in size. On a weekly basis, assessments of the relative greenness, the Normalized Difference Vegetation Index (NDVI), and the departure from the average weekly NDVI (figure 3) are also produced. All can be viewed or downloaded for local analysis from the following website (http://firedanger.cr.usgs.gov).” The fifth paragraph (beginning with “The large fire probability map ….”) described in more detail the obsolete products and was eliminated. Dates of graphics were updated to reflect more recent data (i.e. July 16 2012 was updated to June 29, 2015). Three graphics were replaced in Figure 3: “Large Fire Forecasts”, “Ignition Forecast”, and “Extreme Events Forecast.” They were replaced with “Expected Number of Large Fires per Predictive Service Area”, “Weekly Greenness”, and “Departure from Average NDVI.” The text for Figure 3 was modified accordingly. Contact information was modified: Jeff Eidenshink has retired.