Blaine C Fire

1991138,147 acresMontana

The Blaine C Fire burned 138,147 acres, about 216 square miles, across 2 counties. It began on October 16, 1991.

Watch how it happened

Blaine C Fire · 1991

How it happened

See how severely each place burned, revealed outward from where it started.

About this replay
IgnitionOctober 16, 1991Historical replay — order not recorded
Final area138,147 ac
Revealed—
Counties2

How severely it burned

Burn severity inside the final perimeter, classified from Landsat images taken before and after the fire.

Map of burn severity across the Blaine C Fire
Burn severity by class
SeverityShareAcres
Moderatemixed: many trees killed, some survive39%53,798
Lowsurface fire, most trees survive44%61,065
Unburned to lowislands inside the perimeter, little change16%22,688
Increased greennessvegetation greener after the fire than before0.4%597

No part of the fire was classed as high severity; 39% burned at moderate 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.

Acres burned by county
Blaine CountyMT136,457
Hill CountyMT1,733

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service). Type recorded: Wildfire.