Since 1978, we have been developing and using a mobile laboratory to make observations of storms. With our mobile lab, we record electric field, slow and fast electric field changes from lightning, optical transients, return stroke velocity, temperature, pressure, dew point, wind speed and direction, lab position, and video images of clouds and lightning. The mobile lab idea has been key in obtaining new information on several phenomena, e.g., field changes to compare with high-altitude airplane measurements, electrical aspects of tornadic storms, and positive ground flashes. Mobile lab data were critical in an evaluation of the two ground strike location networks that provide scientific and operational data in the United States. We have documented that storms often are more dominated by intracloud (IC) lightning than previously reported. Observations on two tornadic storms show the IC flashes averaged ≥80% and 95% of the total lightning, respectively. Mobile lab and polarization radar data of storms producing wet microbursts in Alabama suggest that high percentage of IC flashes (95%) occur when a larger percentage of the total storm mass is convected above the freezing level. With the recent addition of mobile balloon launch and tracking, we also make soundings of the electric field and meteorological parameters within storms.