During the California Land-Falling Jets Experiment (CALJET), conducted along the California coast and over the eastern North Pacific Ocean during the El Niņo winter of 1997-98, extensive off shore (600-1000 km) and nearshore measurements were made of the structure of the low-level jet (LLJ) within numerous landfalling storms.The extensive and integrated observing systems provided measurements of changes within the storm system and the LLJ from far offshore to the coastal region. The offshore observations were made using satellite measurements and the NOAA P-3 research aircraft, which provided in-situ, Doppler radar, dropsonde and airborne expendable bathythermograph (AXBT) measurements. When the storms came onshore along the California coast, measurements were provided by the aircraft, satellites, an extensive array of 915- Mhz wind profilers and collocated surface meterologicalsites, an S-band vertically pointing Doppler radar, ceilometers, mobiledual-Doppler radars, mobile soundings, and the standard meteorological and hydrological observing network including NEXRAD radars. This presentation will compare the LLJ structure of a landfalling storm in both the offshore and coastal regions, illustrating the various aspects of the structure highlighted by the various observational platforms and the use of the observational system to derive evolutionary aspects of the LLJ structure