Archive for the ‘Weather Stuff’ Category

Sea Breeze

Thursday, May 17th, 2007

Hi all got a bit of luck a few days ago when it came to getting photographs showing the effect of the coast land/water boundary setting up a sea breeze… all afternoon the MET wind based on the synoptic charts was due to be NW – West in direction and a high chance of being blown out in the hills, however the TAF’s & METAR’s (generate the display on XCWeather, MET Actual Report) were starting to show a sea breeze developing on the East Coast of Scotland (EGPN, EGQL & EGPD) so it was up to the ridge & cliffs at Arbroath, (one of our restricted sites).

The wind vane on the tower is showing a nice SE which the balloon did not match until after 7:30, up till then the upper winds (NW) resulted in me looking at the tail end of the tethered balloon for most of the day!

The leaves folded over on the trees next the Dundee Arbroath road show a 12-15kt SE wind at ground level almost 180* in direction compared to the wind at balloon & cloud level! From the angle of the teather line it looks as if at the balloon height the wind is of a similar strength but NW.

Inversion Wave

Friday, April 13th, 2007

Ending the day getting some solo, then tandem flying up at the ‘Cairn’ with Susan up visiting Ali from ‘doon south’, we were treated to the clearest example of late evening lee wave acting on pollution trapped lying along the boundary layers generated by inversions that I have ever seen, unfortunatly the pictures do not do it full justice as the sun was just too low by the time I had my work camera. Worth posting none the less 🙂

Looking lower the smoke which had been rising to just below the inversion half an hour before is now ‘up side down’ in appearance showing just how low the warm air from above had dropped on sun down, not good for the last bit of flying of the day but intresting to see!