Instability indices and their thresholds for the forecast of thunderstorms over Siberia
The potential of instability indices (Lifted index, Showalter index, Total Totals index, K-index) in assessing atmospheric instability is examined for the areas of Western and Eastern Siberia. We present the thresholds of indices in the days when thunderstorm development is possible with 70% of a probability. The spatial heterogeneity of the threshold indices values was determined, when convective hazards (particularly thunderstorms) are formed.