What indices does AccuWeather produce for severe weather?
Many indices can be useful for predicting severe weather. The importance of one particular index varies from situation to situation. The following are explanations of US maps produced; these and other indices can be shown for each individual Upper Air Reporting Station from across the world by viewing the SKEW-T’s. For detailed information on SKEW-T’s, see below. Current Total Totals Index- This US map is produced every morning and evening from upper air data. This index determines the potential for thunderstorms and is very helpful in diagnosing the difference between weak and strong thunderstorms. The relationship between the TTI and Thunderstorm Acitivity is as follows: 44 – Spotty, usually light thunderstorm. 46 – Spotty, usually moderate thunderstorm. 48 – Usually heavy thunderstorm. 50 – Usually heavy thunderstorm with hail possible. 52 – Usually heavy thunderstorm with a tornado possible. 56 – Heavy thunderstorm with tornadoes likely. Current/Forecast Lifted Index- The Current U
