Current 700 hPa Geopotential height forecast

Solid contours indicate positive deviations from normal and dashed contours negative deviations. The purple shading indicates where the mean of the ensemble forecast was different to the mean of the model climatology at the 90% significance level according to a students T-test. This indicates where the model is more 'confident' that the forecast mean is different to climatology. There are no guarantees that a significant deviation will be realised.