Quote:
Originally Posted by Steve_PPP
Whats T850? Temperature in celcius at 850ft? 850 metres?
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Its the temp at 1.5km. Its taken from there as its not disturbed by other factors.
Depending on where you are in the world, as a rough guide you add on 10 degrees for surface temperature. But then you also have to factor in wind chill etc etc.
Here's some jargon from a real weather watcher
Based on background signals and current model forecasts a Jan SSW seems rather likely...but in all honesty we probably won't need it, I think we will get some tropospheric led wave flux in to the lower stratosphere before the year is out. If we end up with a West Based Negative NAO just after xmas it's not the end of the world as this will likely lead any sort of Wave 2 attack on the vortex, hopefully re-amplifying the longwave pattern and sharpening up the trough through Scandinavia to drive away the high heights in iberia, so I think we just need to hold out for another couple of weeks, im 90% confident the cold will arrive with a vengeance in Jan.