Studies quasiclassical solutions of a quantum system, a crystal electron in a uniform steady electric field. Classical solutions can be formed from wavepackets of Houston functions or Stark states which are tightly localised in both position and crystal momentum. The position and momentum can be localised initially within the uncertainty principle. However while the momentum uncertainty is conserved with time the position uncertainty oscillates with the Zener period. It is maximal as the inflection points of the band structure. The departure from the initial value of the position uncertainty depends on the band structure and is inversely proportional to the field. For fields lower than approximately 10 kV cm-1 the electron can only be tightly localised for times short compared with low-field scattering times. For fields higher than approximately 10 kV cm-1 the electron can be tightly localised throughout the whole Zener orbit.