Tornado Risk

- Index used at SPC based on CAPE, SRH, and BRN Shear

- Highlights areas with a CAPE > 200 J/kg, SRH > 100 m2/s2, and BRN Shear between 30 and 100 m2/s2.

- STP values are assigned as follows: If BRN Shear is >40 m2/s2, the STP values are 30, 40, and 50 for SRH values > 200, 300, 400, respectively. STP values range from 5-20 when SRH is 100-200 m2/s2 and the BRN Shear is 30-40 m2/s2. Note that this index does NOT incorporate CAPE beyond the inital check for a CAPE value of at least 200 J/kg.

- Highlights areas with a CAPE > 200 J/kg, SRH > 100 m2/s2, and BRN Shear between 30 and 100 m2/s2.

- STP values are assigned as follows: If BRN Shear is >40 m2/s2, the STP values are 30, 40, and 50 for SRH values > 200, 300, 400, respectively. STP values range from 5-20 when SRH is 100-200 m2/s2 and the BRN Shear is 30-40 m2/s2. Note that this index does NOT incorporate CAPE beyond the inital check for a CAPE value of at least 200 J/kg.