The wind direction map shows overlapping coverage in black, and single-radar coverage in red and blue. Dual coverage removes the directional ambiguity, which has been extended into the single-radar coverage area using continuity. The region of surface convergence indicated in this map coincides with the location of a storm band seen with an airborne radar.
Current speed is encoded in color.
The surface current pattern shows the strongest ocean response to the right of the storm's track, with an apparent circulation center about 50 km to the south of the storm center, and near-inertial rotation in the storm's wake. The region of surface current divergence about 1 deg to the south of the storm would induce the upwelling of cooler thermocline water observed by others in storm wakes. Dual-radar coverage also permits an estimate of a wave directional spreading parameter, s, assuming a cos s angular spreading with respect to the wind direction. The storm was moving northward at the time, so the regions of greatest wave directional spreading correspond to regions where the surface wind direction has changed the most in the last few hours.