Another “wedge” on the way

As promised our weather changes continue with the up and down back and forth pattern well established with the wavy jet stream pattern.

As I’ve mentioned in many past blog posts here the frequency of Gulf of Mexico lows this fall and start of winter is eye catching, indicating an active split-flow Southern Jet stream pattern. It’s the type of pattern that often provides ice and snow later in the winter.

Yet another “wedge” or CAD event (cold air dam) is taking shape today and tomorrow, that’s when High pressure to our Northeast feeds cold dry air down the lee of the Appalachians and it gets wedged or damed up against the mountains as warm moist air aloft overrides the top of the shallow cold air creating clouds and precipitation as low pressure and a front advance Northeast out of the Gulf.

You can see the process in the maps below.

MOST of us will get back home dry today but there is a small chance of a shower at the end of the afternoon with rising rain chances this evening becoming likely overnight into tomorrow, then gradual improvement over the weekend with Sunday the best of the two days. Rainfall totals from the system expected to average a half to one inch.

It stays chilly with a high today only in the lower 50s and highs tomorrow only in the low to mid 40s but we moderate to near 60 Sunday.

MID-AFTERNOON THURSDAY: