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Up • Synoptic Conditions • Event Summary • Radar Summary • Polarimetric Data
CASE 29 - Collapse of leading-line MCS into stratiform rain and new development to N
8/16/04
Microphysical scans 0230 - 0345 Z, 1h 15m

S-POL SUMMARY:

Microphysical scans captured the collapse of this MCS into stratiform rain, with new development along its northern edge.

S-POL Log 040816  

Scan Overview:

 

2216:

Line of convection running from NW-SE through S-Pol scope and loose convection over the mountains to the NE. Convective line has formed along a seabreeze front visible in the GOES-10 Vis loop.

2300:

Increased organization along the seabreeze front.

2330:

Strong phase shifts through SE portion of the line. Southern portion of system slowly propagating towards the GOC - perhaps due to onset of landbreeze enhanced by outflow from mountain storms.

0021:

Linear organization breaking up into several multicellular systems, gradual westward motion.

     

0030:

S-Pol log discussion: MCS resembles a leading-line trailing-stratiform (LLTS) MCS, with stratiform rain well to the east of the leading line. Leading line (which consists of remnants of seabreeze front) looking good while stratiform rain (which consists of remnants of mountain convection) is dying out as sun sets. If origins of these 2 regions is correct, they are not dynamically linked which may be responsible for the loose organizational structure.

0230:

Begin Microphysical Scanning, Running NearPPI135: Convection portion of system looking decreasingly organized, out over the GOC.

0245:

Switching to MicroNear135:

0300:

Switching to MicroFar135: Main convection well to the N of line, looks detached from original line.

     

0315:

Switching to MicroFar90: Concentrating on stronger cells to the N/NW, at far end of S-Pol scope.

0330:

End Microphysical Scanning, Switching to ClimoFar: Convection dying.

       

 


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