Wednesday, April 13, 2016
Omega Block Setting Up
In other words, with this pattern, the areas under the influence of the dome of high pressure see sunny skies and warmer temperatures for a longer duration of time. Meanwhile, the locations contained within those jet stream dips tend to see cooler-than-average temperatures and an increased risk for precipitation. You can see these patterns clearly on the GFS temperature forecast for this weekend -- the blue shades representing colder air and the yellow shades representing warmer temperatures.
So the next time a meteorologist mentions an "Omega Block" pattern, you will know that wherever the omega/high pressure is located is where warmer temperatures can be expected.