hey, thanx for this! now i feel like I've turned a corner!!!
so let me get this straight, this is only going with how I've picked up tips on how to read the charts (a bit)....
going off the GFS 18Z
we have low pressure over Canada swirling round build up high pressure and pushing it north over Greenland which in turn drags low pressure over Scandinavia and the northerly flow of the scandi low sits over us by Friday but by Tuesday the two lows have dissipated the high pressure and joined together, leaving a milder westerly for the south and a northerly for the rest of us, leaving more settled conditions.
Thursday sees the same pattern again, low over Canada pushing high pressure back up towards Greenland which squeezes low pressure back towards Scandinavia and this low pressure over Scandi is what is swinging the cold air over the U.K. by Saturday (8th)? (breath Pete, breath!!)
now i know that the tighter the iso's get the windier it gets but what i really don't quite get yet is how to tell if it's going to rain?
i know people have been poo pooing the GFS but as i have often said to the my kids, "expect the worse, everything else is bonus!" hahaha!
wait!? i've worked out the rain fall thing!! hahaha! it's amazing what happens when one just thinks for a minute!!!