Upper Willow Fire
200140,972 acresNevada
The Upper Willow Fire burned 40,972 acres, about 64 square miles, across Humboldt County. It began on August 17, 2001.
Watch how it happenedUpper Willow Fire · 2001
How it happened
Watch it burn in the order satellites saw it, coloured by how severely each place burned.
How severely it burned
Burn severity inside the final perimeter, classified from Landsat images taken before and after the fire.
| Severity | Share | Acres |
|---|---|---|
| Highmost vegetation consumed, soils altered | 2.6% | 1,050 |
| Moderatemixed: many trees killed, some survive | 20% | 8,018 |
| Lowsurface fire, most trees survive | 44% | 18,214 |
| Unburned to lowislands inside the perimeter, little change | 33% | 13,675 |
3% of the area inside the perimeter burned at high severity, about 1,050 acres; 22% burned at moderate or high severity.
Monitoring Trends in Burn Severity (U.S. Geological Survey and USDA Forest Service). Classes come from the change in a Landsat burn index (dNBR) between images before and after the fire; acres are each class’s share of the fire’s mapped area.
Where it burned
Acres inside each county, measured from the satellite-mapped perimeter.
| Humboldt County | NV | 40,995 |
Other large fires in Nevada in 2001
- Sheep Fire85,037 acres
- Spaulding Fire76,288 acres
- Buffalo Complex (Hot Lake)74,109 acres
- Unnamed Fire55,218 acres
Monitoring Trends in Burn Severity (USGS and U.S. Forest Service). Type recorded: Wildfire.