The Growing Season Index (GSI) in NFDRSv4, controls live fuel moistures, replacing the 1000-hour and X1000 controls in the 1978/88 versions. The moisture bounds (30-250 for herbaceous and 50-200 for woody shrubs) and behavior of annuals versus perennials are maintained.

Source: M. Jolly, Modernizing the US National Fire Danger Rating System (v4)

Station Information Report HOW-TO

• How to filter a Power BI Report of Weather Station Information for attributes of interest to the user.

NFDRS Daily Summary Report HOW-TO

FEMS Read-Only API User Guide

• Updated guidance for using the FEMS API for external purposes, March 2026. 11 pages.

Field Sample Area Editors Contact List

• Master list (spreadsheet) of Field Sample Area Editors, updated July 2026

FEMS 3.7 Master Weather Station List

• Master weather station list (spreadsheet), including station metadata, in support of FEMS 3.7, updated July 2026.

RAWS QC for FEMS Slides 

Attention: Much of the content on this page is sourced from the National Wildfire Coordinating Group’s Fire Danger Subcommittee and their curriculum for the Geographic Area Rollout Workshops presented in 2018-2020 to transition to the use of NFDRSv4.  At the time, NFDRSv4 was referred to as NFDRS2016.  Some content will also refer to the Weather Information Management System (WIMS), which has been replaced by FEMS.  The explanations in this content for the science behind and the mechanisms within the NFDRS are current and dependable, despite these possible distract

Dr. Brown's Presentation on QC Gap-filled Weather

Data Download Quick Reference Guide

• A step-by-step guide to downloading data (Weather, Fire Danger, Field Samples) from FEMS.  April 2026, 13 pages.

Using Copy Data Link in FEMS (Tech Tip created May 2025)