The Western United States MTBS-Interagency Database of Large Wildfires, 1984–2024 (WUMI2024a)

This Western US MTBS-Interagency database (WUMI) of wildfires covers the period 1984–2024 and the geographic domain of the 11 westernmost states in the contiguous US. This is an update of a previous WUMI verson of the WUMI, so here has the version number 2024a. The previous version can be found at https://doi.org/10.5061/dryad.sf7m0cg72. The WUMI2024a represents 21,940 wildfires ≥1 km2 in size, or 22,234 if fire complexes are disaggregated into their constituents. We compile the WUMI2024a by merging seven government databases and quality controlling by identifying and removing duplicate occurrences of fires. An important feature of this database is that it includes fire perimeters and 1-km resolution maps of the areas burned within. For more than 10,300 wildfires, the map of area burned is based on 30-m satellite data and accounts for unburned areas within fire boundaries. The fire perimeters and burn maps aid assessment of the landcover types that burn and can be used to improve simula..., , # The Western United States MTBS-Interagency Database of Large Wildfires, 1984–2024 (WUMI2024a)

Dataset DOI: [10.5061/dryad.63xsj3vd4](10.5061/dryad.63xsj3vd4)

## Description of the data and file structure

The WUMI2024a merges wildfire occurrence data provided a number of government sources to produce a comprehensive database of locations, sizes, dates, and maps of western United States (US) wildfire events ≥100 hectares (1 km2) in size from 1984–2024.

### Files and variables

#### File: fire_lists.zip

**Description:** This directory contains lists of individual fire events. There is a subdirectory for each of the six datasets represented in original_data/. Each subdirectory contains a text-file list of all western US fires ≥10 acres (4.04 ha) that appear in each dataset. Each sub-directory, except for mtbs/ also contains a quality-controlled list (*_qc.txt) of western US wildfires ≥100 ha in area. Quality control mostly consists of eliminating redundancies and also includes correc...,