The latest update from the ECMWF 6-week forecast takes us through into mid-September. This is not the official forecast for September from WeatherWeb (this will be issued later) but it gives a reasonable indication of expected conditions for the next 6 weeks or so. 12th August to 18th August Lower than normal

Over the past week or so, we've looked at what a tephigram is, how to determine the Lifted Condensation Level (LCL) and what stable atmospheric conditions look like on a tephigram. Finally today I'm going to show you an example of unstable atmospheric conditions. This forecast sounding is taken from Weatheronline and