Stability indices derived from mesonet and sounding data were useful in identifying stable regions where storm initiation was unlikely. However, in regions where indices indicated a degree of latent instability, storms often did not form and if they did their intensities were not correlated to the magnitude of the instability. Small scale fluctuations of this magnitude are common. In addition, observations and numerical model results suggest that in the High Plains, profiles of boundary-layer moisture are necessary to identify the precise locations of storm initiation along convergence lines. Mesonets cannot provide this information and it is impractical to obtain it solely from soundings.
Cumulus clouds identify regions where moisture is mixed to the cloud condensation level.
Therefore, monitoring cloud location and development with visual observations, very sensitive radar, and satellite imagery is a useful indirect means for identifying regions of deep moisture. Observations and numerical model results reinforce the importance of using the locations of clouds, stationary boundaries, and horizontal rolls as potential indicators of deep moisture and potential locations of thunderstorm initiation. Mesonet and sounding data are primarily useful for identifying the potential within a mesoscale air mass for thunderstorm initiation. Therefore, mesonet spacing of 25 to 50 km and access to a morning sounding are felt to be adequate. Soundings collected in proximity to radar-detected boundaries were marginally useful in determining the likelihood of storm initiation.