This technical note presents an extension of earlier analytical methods published in 1995 by Giroud et al. for evaluating the uplift of geomembranes by wind. The extension incorporates: (i) the influence on wind uplift of the slope inclination of an exposed geomembrane and (ii) a more accurate expression of the tension-strain relationship in a wind uplifted geomembrane. Use of the revised methods is particularly relevant for projects in which the exposed geomembrane mass per unit area is high, the slope inclination of the exposed geomembrane is steep, and the exposed geomembrane is subjected to strains due to mechanisms other than the wind (e.g. gravity, temperature) prior to wind uplift.