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Up • Synoptic Conditions • Event Summary • Radar Summary • Polarimetric Data
CASE 4 - Irregularly shaped MCS (land -> ocean)
7/12/04
Microphysical scans 1000 - 1500 Z, 5h
(System lifetime: 0500 - 1600 Z)

S-POL SUMMARY:

S-Pol caught the northern portion of this MCS. The northern portion of the system, including a few intense but shallow cells, were in range of S-Pol as they moved offshore. MCS reached its peak at around 1000Z, which marks the beginning of microphysical scans. A cell to the W/NW of S-Pol took on a bow shape at the end of the observation period (~1445 Z).

S-POL Log 040712  

Scan Overview:

 

0530:

Running ClimoFar/ClimoShallow: There is scattered convection to the SE (0530), which has initiated over SMO and is moving out over the GOC. Cells are shallow and pretty far away. About 0800, the northern portion of the larger system moves into the SE quadrant of the S-Pol scope but remains quite far away (0830). Around 0900, some cells observed to have 60+ dBZ in cores.

0900:

Ad-hoc RHIs: Through various cells (140, 120, 125). RHIs show cells are shallow and not very impressive. Continued in ClimoFar mode.

1000:

Begin Microphysical Scans - Ad-hoc PPIs: System is looking well-defined (see image above).

1200:

Running MicroNear: Switched PRF to 960 Hz. Centered 135 degree sector scans on system (1200) as it tracked from W to E, out over the GOC. Switched to MicroFar at 1330, as the only significant convection is at 270-300 deg, 60-80 km.

     

1330:

Running MicroFar: Only significant convection is at 270-300 deg, 60-80 km. At 1430, convection to the W over GOC has Kdp ~ 1/2, dφ/dr ~ 2.5 deg/km, RR ~ 125 mm/hr, 60 dBZ to 8-10 km. At 1450, a cell at 296 deg / 120 km is taking on a bowed shape. Scan at 1500 shows Core has definitely bowed with accelerated rear inflow clearly evident.

1500:

End Microphysical Scans: . At this time, convective activity has moved beyond S-Pol domain.

       

 


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