A storm like that is an 'anomaly' for this area. [=a storm like that does not usually happen in this area]
The doctor detected an 'anomaly' [='irregularity'] in my heartbeat.
(..) We haven't seen them since the great crisis. They came from a rift in our sun, a rift that connected directly to their universe. We take it this was no mere anomaly. No. We were able to make a detailed analysis through the ring. There's no mistake. The demons were sent by Krona. GUARDIAN: (..)2011 Green Lantern: Emerald Knights