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Bradbury Index calculator

 

 

Enter the 500 hPa ThetaW (C)
Enter the 850 hPa ThetaW (C)
The Bradbury Index is

 

BI    <  -2       thunderstorms likely during summer.
BI    < +3       thunderstorms likely during winter.
BI    < +3       thunderstorms likely in all seasons with cyclonic 500 hPa pattern.

This Index is also called Potential Instability Index.

The lower the values, the more unstable.

 

Formula used: BI = Tw500 - Tw850

 

 

 

Note: Java script must be enabled