IEM Daily Feature
Thursday, 14 June 2007

Omega block

Posted: 14 Jun 2007 04:23 AM

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Jet stream on 14 Jun 2007
Our recent weather pattern has been stuck in what is commonly referred to as an "Omega Block". This happens when the jet stream is buckled around a strong anticyclone (high pressure system). The shape of the jet stream resembles the greek letter omega. This pattern has persisted for many days now keeping our weather dry, while it has been raining all week over South Dakota to Kansas. There is a strong jet over the Northwest US which should help to "flatten" out the ridge and get storm systems crossing the state again.

Good = 23
Bad = 9