In regard to the LI, it should be noted that negative values indicate conditional instability given that there is a forcing mechanism to initially lift air parcels to their 'level of free convection'.
Positive values indicate the lack of convective instability.
However unlike TPW, the LI has a distinct diurnal trend as it is linked to the temperature profile in the lower atmosphere. To view hourly animations per day, just click on the X for the desired parameter and time in Table 1. Note that each of these loops require 48 images to be downloaded which may take considerable time and requires sufficient computer memory. You can select overlays of geopotential height fields at 500 and 850 mb by clicking on the appropriate boxes. The contours in these overlays give an approximate direction of air flow at the mid and lower altitudes above the ground.