SPol Summary

1
S-Pol Summary

• 31 May 2008
• 0645 UTC meeting
• John Hubbert and Angela Rowe

2
S-Pol summary

• Filtering capabilities (no clutter filter)

3
Filtering
Legacy clutter filter
CMD processing
4
S-Pol summary

• Insects

Z
ZDR
5
S-Pol summary

• Initiation along slopes, followed by rapid
  dissipation over higher terrain (e.g., 23 May)
• Sea breeze initiation over coastal plain (e.g. 26
  May)

6
S-Pol summary

• Initiation along boundaries to S over ocean
  (e.g., 28 May)

7
29 May 2008

• Overlays of reflectivity (1.9º elevation angle)
  and topography from 0005, 0105, 0205, and 0250
  UTC highlight echo along western slopes of
  terrain
• Rain at S-Pol at 0200 UTC.

8
29 May 2008
VIS (0530 UTC)

• Notable W-E oriented line of convection to the W
  of S-Pol extending perpendicular from the coast.
  This boundary was also evident on satellite
  images for the previous 5 hours.

Radar reflectivity (0630 UTC)
9
29 May 2008 overnight

• 1730 UTC
• Line of cells over western slopes produced
  outflow boundary

10
30 May 2008

• Used SuperSite scanning strategy for majority of
  day (included RHIs over this region) to focus on
  cells moving toward the terrain

Z
ZDR
11
30 May 2008

• Most activity limited to NE of radar along
  western slopes
• Continued development in this region for most of
  day, but most impressive cells gt75 km away from
  S-Pol

12
2000-2300 UTC 30 May 2008

• Precipitating features to south of S-Pol during
  early morning hours
• RHIs and polarimetric variables reveal intense
  cores

13
RHIs (2309 UTC)
Higher Zdr indicating larger drops
Graupel aloft, large melting drops below
Melting level
Phase shift
14
31 May 2008

• 0500 UTC
• Indication of large-scale organization of
  precipitation
• Cells over SuperSite
• Continued surveillance scanning
• How will system interact with terrain as day
  progresses?