Potential Cold Shot Incoming.

[phil nw.]

The lastest fax and Nw short range model for tomorrow pm.

A rash of showers with the ongoing snow risk moving well inland behind the cold front ,enhanced by the minor trough heading across in the flow.

There could well be some surprise snowfalls in locations with quite modest height especially in any heavy showers where evaporative cooling becomes a factor with quite a cold upper pool in place.

[kold weather]

The GFS based models (such as NMM, WRF, obviously the GFS) are quite keen on doing something with the trough, other models are basically showing nothing there at all. I suspect given the cyclonic nature of the airflow and low pressures that the GFS idea is correct and there will be troughing heading west. I see the fax charts also suggest this.

Given time of day, probably not much will settle but it will be nice to get a heavy snow shower come through, and could get a brief dusting before it all melts again.

Edited January 21, 2019 by kold weather

[Polar Maritime]

Few post gone as unrelated to this thread.

A few shots from Flagg just now.

[Had Worse]

 

This morning.  Now a trough is about to repeat the process and looking out west, further potent showers a ganging up.

[oliverek7]

Latest ec models showing jet stream taking a sharp dive next week with a trough forming just south of the uk, perfect setup for easterly winds as low pressure should form in that trough!!!