Friday, January 7, 2011
So Metservice are predicting heavy TStorms today...Why??
Have a look at the squiggly line graph. Both lines are close together...cloud and rain forms very quickly, and the cloud tops are very very high. However the rising air is likely to fall as rain before hail forms...having said this I'm guessing hail is a probability but not big stones...
After todays system we get drier clear air from the SE...should produce some very good days...for those who want to do a 500km this weeks the best option for a while. You would be tasking out across the Waikato and then down the western side of lake Taupo. Going east of Taupo is likely to get mixed up with sea air from Hawkes Bay. Could be blue is places but strong thermals and high cloud bases... and I'm stuck at the beach...bugger.
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The "squiggly line graph" is a thermodynamic diagram called a tephigram, in this case based on model data. Tephigrams are used by meteorologists to assess, amongst other things, the amount of energy available for convection and how readily that energy can be tapped. How close the lines are on the chart is not necessarily relevant.
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