Upper Air
Cold in the center (-46 F)
Warm (-31 F)
Jet Stream
Snowfall Dec 26-27, 2010
Summary
Surface Lows tend to be east of upper air troughs. Troughs are cold.
Cold surface Highs tend to be east of upper air ridges. Ridges are warm.
Jet streams help air to move upward which helps create precipitation.
Knowing where the surface Highs, Lows, and fronts will be means you can forecast using the Norwegian Cyclone Model.
