What frustrates most is the PROB TEMPOs of TS forecasted for +9 hrs of a 24 hr TAF. Yesterdays SE UK forecast being the case in point. PROB 30 Tempos of TS absolutly nothing big around the SE yet the fact wasn't amended to reflect the fcst was wrong. Result was most of my mates came in with ++ fuel (quite rightly too based on the fcst), big cost and enviromental impact too.