2. Parameters

Shear Assessment » Bulk Richardson Number (BRN) Skew-T Procedure

The Bulk Richardson Number is calculated as follows:

BRN = CAPE / (0.5 * (u6km - u500m)2)

Where
u6km is the mean wind speed in the lowest 6000 m and
u500m is the mean wind speed in the lowest 500 m.

The BRN is difficult to calculate manually, but is typically calculated and displayed on computer-generated skew-Ts. On the Interactive Skew-T, it is displayed on the right-hand side of the diagram once you click on the "CAPE" menu item at the top.