Figure 3

The monthly-averaged regressed patterns of daily predictor variables for the three WNPSH modes: (upper panel) precipitation (shade; mm), 1000–500 hPa vertical moisture convection (contour; g kg−1), and 850-hPa geopotential height (red contour; m), and (lower panel) surface (2 m) air temperature (shade; °C), net radiation at the surface (contour; W m−2) and 850-hPa geopotential height (red contour; m). This figure was created by using the Grid Analysis and Display System (GrADS) version 2.1 available at http://cola.gmu.edu/grads.