October 2013 North American storm complex

October 2013 North American storm complex
Category 3 "Major" (RSI/NOAA: 9.78)
The storm complex on October 5
TypeWinter storm, Blizzard, Tornado outbreak, Flood
FormedOctober 3, 2013
DissipatedOctober 7, 2013
Highest gust71 mph (114 km/h)
Lowest pressure1000 mb (29.53 inHg)
Tornadoes
confirmed
22
Max. rating1EF4 tornado
Duration of
tornado outbreak2
3 days, 16 hours, 10 minutes
Maximum snowfall
or ice accretion
58 inches (1.5 m) Lead, South Dakota
Fatalities3 fatalities
Damage$100 million
Areas affectedIntermountain West
Midwestern United States

1Most severe tornado damage; see Enhanced Fujita scale
2Time from first tornado to last tornado

The October 2013 North American storm complex was a massive blizzard and tornado outbreak that affected the Northwest, Rockies, and much of the Midwest in early-October 2013. A total of 22 tornadoes were confirmed as the system moved eastward across the eastern half of the United States, including two that were rated EF4. The storm was unofficially named Winter Storm Atlas by The Weather Channel.