How weather modification can intensify storms
When a moisture front presents itself, cloud seeding companies go into action, dispersing silver iodide in front of the incoming storm… specifically, over areas of land where precipitation is desired. These hygroscopic aerosols provide a field of CCNs for jet exhaust moisture to bond with and, combined with the higher ice crystal saturation that comes from moisture preceding the storm, aircraft can spawn thick clouds before the storm clouds arrive.
This creates a shady area in the path of the incoming front, providing a low-pressure “downhill run” for the storm. In fact, this can allow some precipitation to arrive that would otherwise be repelled by higher pressure.