1910: The worst avalanche in US history regarding lives lost, occurred Wellington, Washington. Heavy snow occurred from February 26 through the 28th, which blocked the rail lines. Weather conditions turned on the 28th with a thunderstorm occurring over the area. Just after 1 AM on March 1st, a ten to 14 foot high mass of snow broke free from the mountain side and pushed the trains 150 feet down into the Tye River Gorge. In all, 96 people were killed from this avalanche.
Sources: History.com Seattle Times.com
— NWS San Diego (@NWSSanDiego) March 1, 2017
1998: Incredible amount of snow falls on Lead, South Dakota from February 25 through March 1. The official storm total was 103 inches for the 5 day period. Source: NWS Office in Rapid City, SD.
— NWS Tallahassee (@NWSTallahassee) March 1, 2017