Improving the Predictability of Severe Convective Weather Processes by Using Wind Vectors and Potential Temperature Changes: A Case Study of a Severe Thunderstorm

Figure 1

graph. If the angle between the curve and the -axis is approximate to or bigger than 90°, the data indicate that the atmosphere in this area is distributed extremely homogeneously and that this area is a thermally unstable area (gray area). Otherwise, the area is a stable area (pink area). If the unstable area is located between 300 and 100 hPa, the phenomenon of ultra-low temperature appears.