Clouds in midlatitude cyclones: how CloudSat can help evaluate GCMs Recently, NASA launched a space borne "cloud" radar, an instrument that can give a high resolution vertical cross section of clouds from surface to tropopause; a view from within never achieved so far on a global scale. Amongst the many applications this instrument may have, we chose to explore cloud vertical distributions in midlatitude cyclones. There are two main motivations: 1) Cyclones were modeled in the 1920's by researchers at the Bergen School in Norway, and cloud distributions were established based mostly on ground based observers accounts. So will CloudSat observations verify the Bergen model? 2) There are cyclones in GCM simulations, we already know that the fronts are not oblique enough, but what about clouds, are they in the right place in the right amount? We start by studying cloud distributions across warm fronts, and I'll show our first results for north hemisphere oceanic cyclones.