Total Totals Index is a measure of thunderstorm potential. Generally higher in value if low-level moisture extends through the 850 mb level.
| < 43 | Stable.Thunderstorms Unlikely. |
| 43 - 44 | Isolated Thunderstorms. |
| 45 - 46 | Scattered Thunderstorms. |
| 47 - 48 | Scattered Thunderstorms/Isolated Severe. |
| 49 - 50 | Scattered Thunderstorms. Few Severe. Isolated Tornadoes. |
| 51 - 52 | Scattered Numerous Thunderstorms. Few Scattered Severe. Isolated Tornadoes. |
| 52 - 56 | Numerous Thunderstorms. Scattered Tornadoes. |
| > 56 | Hide!!! |
Other UKAWC Stability Indices:
| CAPE | K-Index | CIN | Showalter Index | SWEAT | Lifted Index (LI) |
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