Some additional information
• The pseudopotential temperature(Θp.p) is a combination of the air temperature and the humidity. Θp.p is the temperature that an air mass package will have after condensation and falling out of all water vapour due to upward motion followed by dry adiabatic downward motion to the starting position. In practise the combination of Θp.p and the wind barbs should be
used.
Θ+dθ, e=0
Θ, e |
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Initial level |
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Θe, e=0 |
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1000 hPa |
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Equivalent-potential temperature |
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• If we have a convergence in an area with relatively high tpspot we should be aware to convection or even severe thunderstorms.Although we have that parameter only for 2m-values the following thresholds can be used as guidlines:
•- tpspot < 50°C: thunderstorms not likely,
-50°C > tpspot < 60°C: thunderstorms possible,
-60°C > tpspot < 70°C: thunderstorms likely (partly severe),
-70°C > tpspot < 80°C: severe thunderstorms,
-tpsopot > 80°C: extreme thunderstorms
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