Definitions

Thunderstorms / No Thunderstorms for Switzerland (Station: 6610)

00 UTC; Thunderstorms are predicted if:
- SWISS00 Index < 5.1
- ( ML100 Lifted Index at (500 + 600 + 700) / 3 < 3.0 OR Lifted Index from 850 at (500 + 600 + 700) / 3 < 3.0 ) AND ( Total-Totals Index > 45.0 OR K Index > 24.0 )

12 UTC; Thunderstorms are predicted if:
- SWISS12 Index < 0.6
- ( ML100 Lifted Index at (500 + 600 + 700) / 3 < 3.0 OR Lifted Index from 850 at (500 + 600 + 700) / 3 < 3.0 ) AND ( Total-Totals Index > 46.0 OR K Index > 22.0 )

Thunderstorms / No Thunderstorms for Europe

00 UTC; Thunderstorms are predicted if:
- ( ML100 Lifted Index at (500 + 600 + 700) / 3 < 3.0 OR Lifted Index from 850 at (500 + 600 + 700) / 3 < 3.0 ) AND ( Total-Totals Index > 45.0 OR K Index > 24.0 )

12 UTC; Thunderstorms are predicted if:
- ( ML100 Lifted Index at (500 + 600 + 700) / 3 < 3.0 OR Lifted Index from 850 at (500 + 600 + 700) / 3 < 3.0 ) AND ( Total-Totals Index > 46.0 OR K Index > 22.0 )

Thunderstorms / No Thunderstorms for the USA / Australia + New Zealand

00 UTC; Thunderstorms are predicted if:
- ( ML100 Lifted Index at (500 + 600 + 700) / 3 < 3.0 OR Lifted Index from 850 at (500 + 600 + 700) / 3 < 3.0 ) AND ( Total-Totals Index > 46.0 OR K Index > 22.0 )

12 UTC; Thunderstorms are predicted if:
- ( ML100 Lifted Index at (500 + 600 + 700) / 3 < 3.0 OR Lifted Index from 850 at (500 + 600 + 700) / 3 < 3.0 ) AND ( Total-Totals Index > 45.0 OR K Index > 24.0 )

General Thunderstorms / Strong/Severe Thunderstorms for Europe

00 UTC; Strong/Severe Thunderstorms are predicted if:
- Storm Relative Helicity > 120.0 m^2/s^2
- CAPE_CCL > 650.0 J/kg

12 UTC; Strong/Severe Thunderstorms are predicted if:
- Storm Relative Helicity > 120.0 m^2/s^2
- CAPE_CCL > 500.0 J/kg

General Thunderstorms / Strong/Severe Thunderstorms for the USA / Australia + New Zealand

00 UTC; Strong/Severe Thunderstorms are predicted if:
- Storm Relative Helicity > 120.0 m^2/s^2
- CAPE_CCL > 500.0 J/kg

12 UTC; Strong/Severe Thunderstorms are predicted if:
- Storm Relative Helicity > 120.0 m^2/s^2
- CAPE_CCL > 650.0 J/kg

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Version 1.2 (27.09.2019)