Rocky Mountain Area meteorologists monitor fire weather and National Fire Danger Rating System (NFDRS 16) components from a number of key stations in Wyoming, South Dakota, Colorado, Nebraska, and Kansas.

ERC, 1000-hr fuel moisture, 100-hr fuel moisture and Burning Index graphs are generated according to Predictive Service Areas (PSAs), which are geographic areas of similar climate/fuels based on statistical correlation of RAWS data.

• For geographic comparison we are using Fuel Model Y. ERC and 1000-hr fuel moisture are stable indexes that do not jump around from day-to-day, whereas 100-hr fuel moisture is more variable. All are good for monitoring the fire season.
• The graphs are updated daily and show a trending average for the 2001-Present time period (heavy gray line). The 90th and 97th percentile values are shown as solid back horizontal lines. Seasonal traces for year-to-date (blue line) and other significant/record years (orange line) may also be shown. (Note: Some stations do not have data for all representative years; what is available is used).