|Cancellations||Count||Percent of all cancellations||Percent of all flights|
|Storm 1 (Feb 4-7)||4,053||15.42||0.84|
|Storm 2 (Feb 9-11)||8,208||31.23||1.7|
|Storm 3 (Feb 23-28)||3,693||14.05||0.77|
|All other days||4,252||16.18||0.88|
NOTE: There were 26,281 cancellations and 481,988 scheduled flights in February 2010. Storms correspond to those listed on NESIS (table 2).
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Airline On-Time Performance Database, February 2010