|Mean pentad (5-day averages) 500-mb height for 1979-88.|
Source: Adams and Comrie (1997)
Seven-day mean 500-mb analyses for the first part of June show evidence of this large-scale circulation change this year. In particular, note below the development and intensification of locally high 500-mb heights over northern Mexico, especially during the past week.
People often talk about the monsoon here in Utah, but I've never considered Utah to be part of the monsoon region. Instead, we are in what I like to call the monsoon "surge" region, meaning that we are north of the primary monsoon region, but can get surges of monsoon moisture and precipitation into our area.
Anyone care to bet what sort of monsoon "surge" season we will have this year?