Panel (B) shows the corresponding HSS with respect to the final fire perimeter at 15-min intervals. The HSS shows that between t=0 and t=27 (4:45 PM MST), t5n1, t5n2, t3n3 are overall the most accurate predictions. This reflects the fact that the fast fire spread in these simulations produces a larger simulated fire, which is closer to the observed perimeter than the other simulations. Between t=30 (6:30 PM MST) and t=38 (8:30 PM MST), t5n3 becomes slightly more accurate, indicating that misses and false alarms in t5n1, t5n2, t3n3 are becoming more frequent as the simulated fire approaches the observed perimeter. At t=40 (9 PM MST), t10n1 yields a marginally more accurate fire spread than t5n3, whereas the skills of t5n1, t5n2, t3n3 slightly decrease (by 0.13, 0.06, and 0.09, respectively) as the simulated fire becomes larger than the observed perimeter due to a high number of fire spots. This result suggests that a mechanism to modulate of the ignition criteria could improve the overall accuracy of the parameterization and also simplify the user-defined parameter configuration.