Joint Centre for Mesoscale Meteorology (JCMM)

Abst67 JCMM Internal Report No.67
Cold frontal structure derived from radar wind profilers
by K A Browning, D Jerrett, J Nash, T Oakley and N M Roberts

Colocated UHF and VHF wind profiler radars have been operated during the passage of a sharp cold front.  The results demonstrate the utility of the profilers, in conjunction with a conceptual model, for identifying and quantifying many of the features commonly associated with such fronts:  low-level and upper level jets, rearward-sloping warm-conveyor-belt flow with underlying rear-inflow.  The UHF radar detected much of the transverse circulation and also the vertical distribution of precipitation, including a possible region of evaporation associated with the dry rear-inflow jet.  The VHF radar, in addition to extending the velocity measurements above the level of the precipitation, mapped the tropopause and, in particular, identified a tropopause fold the position of which corresponded to the origin of the rear-inflow jet detected by both profilers.

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