Analysis of the 25 February MCS

Note: results on this page represent work in progress and caution should be excercised in their interpretation

 

Summary

The MCS analyzed on this day was one of series of precipitation events that moved across the radar domain during the westerly flow regime in late February. The radars captured the evolution of this system from it's formative stage (~20:00 UTC) through it's eventual decay approximately 9 hours later on 990226 (the decay of this MCS and formation of the next precipitation event are difficult to determine). Storm motion was complex, with cells moving toward the southest as well as toward the northeast and much evolution occuring in-place. During the dual Doppler sampling period, the MCS had an average storm motion of about 4 m/s toward the northeast. Radar loops show that the system appeared to form along a poorly defined boundary between TOGA and S-Pol around 20:00 UTC. The system went through a number of cell mergers and eventually joined with convective elements moving out of the northwest. Orgainzation throughout the life cycle was poorly defined and could probably best be described as stratiform precipitation with embedded convection, similar to many oceanic systems observed in other geographic regions (e.g., Darwin, Australia). By 01:00 UTC on 990226, coverage within the dual Doppler lobes was mostly stratiform precipitation. To date, approximately 3.0 hours of ground-based radar data (2200-0100 UTC) have been synthesized for dual-Doppler analysis.

 

Radar Analysis

Profiler Plots (courtesy of the NOAA Aeronomy Laboratory)

 

 

 

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