An early Fall upper level disturbance moved across Southern Montana and Northern Wyoming. A moist northwest flow aloft prevailed resulting in accumulating snow over the Big Horn Mountains.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BYZ wrote it up.
An early Fall upper level disturbance moved across Southern Montana and Northern Wyoming. A moist northwest flow aloft prevailed resulting in accumulating snow over the Big Horn Mountains.
1 winter storm. Local standard time, as filed.
Little Goose Snotel received 13 inches of snow and the Sucker Creek Snotel received 16 inches of snow.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2013Every state in 2013This day in weather historyWarnings in Wyoming, October 2013
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 480237.