Day 3

The forecast this morning predicted a blue day with little or no thermals and a low inversion. One forecast, issued at 0600 hrs predicted thermal strengths of nil and the best prediction that I could come up with was 2-3kts to 3000/4000 ft. RASP indicated that the day would be short in soaring terms with a very narrow window for useable conditions between 1300hrs and 1530 hrs. I set this task

The forecasts were proved to be wrong in several respects, firstly the inversion was higher than predicted, the max temperature reqached was significantly greater than forecast, the wind did not veer to the south and was stronger than forecast. All this conspired to produce 4-5knot thermals to over 4000 ft. Hence the result