The official containment fire perimeter was time stamped four days later, once the fire was 100% contained. However, according to the OAAR, most of the fire spread occurred during the daytime in the ignition day: “at approximately 6:30 PM, the wind decreased to 25-30 mph and the fire behavior decreased in intensity and rate of spread.” The report indicates that at 8 PM MT “weather conditions had notably changed from the prior 9 hours”, and although crews continued to fight fires through the night, we have not found records that indicated significant fire spread overnight. With that in mind, we consider the official fire perimeter was not substantially different from a perimeter that would have been produced on the night of December 30th.