CASE 8 - Cellular
activity over SMO
7/17-18/04
Microphysical scans 2300 - 0230 Z, 3h
30m
SYNOPTIC CONDITIONS SUMMARY:
IOP
status - No IOP at this time. A ridge axis oriented
NW-SE over central Prevalence of moisture
at low-levels in Sinaloa region credited for
thunderstorm development in S-Pol domain.
Synoptic feature map
Day
0 forecast discussion text
Winds
200
mb - model.ETA.200407180000.00_200mb_wnd.gif
500
mb - model.ETA.200407180000.00_500mb_wnd.gif
700
mb - model.ETA.200407180000.00_700mb_wnd.gif
850
mb - model.ETA.200407180000.00_850mb_wnd.gif
EVENT SUMMARY: Groups of cells formed in the foothills and mountains during the evening
hours, probably due to diurnal heating. Cell movement was generally in the W-NW
direction.
2324 Z, GOES-10
24
h precipitation totals -
S-POL SUMMARY: Sector scans were initiated as cellular activity moved with 80 km of S-Pol. Several cells had tops > 16 km and ZDR columns
extending ~1 km above the freezing level. Peak ZDR values below the freezing
level were ~3.5 dB. New cell growth was focused upwind (east) of cells over the
SMO.
S-Pol log - spol_071704.txt - spol_071804.txt
2330Z, Base Reflectivity
2338Z, Cross section of reflectivity in intense cell - >50 DBZ up to 10 km in the core.
2338 Z, Cross Section of ZDR in intense
cell -
SCAN
OVERVIEW:
|
2300 |
Starting MicroFar135: 135 degree sector scans centered on 70 deg.M ost active area appears
to be cell group @ 60 deg az 120 km distance. |
|
2345 |
Switching to MicroNear135: Cells close (within 50 km) of S-Pol
warrants change to near-mode. Center of sector scans also changed in order to
capture cells in NE quadrant.
|
|
0020 |
Cell
complex to NE showing small hail on particle ID. Shifting center of sector
scans to 35 deg.
Several
cells possessing excessive anvils. |
|
0150 |
30
km NE of S-Pol: Cells appears to have put out
outflow bddy and new cell development occurring. |
|
0230 |
End Microphysical Scanning, Switching
to ClimoNear: Cell activity diminishing. |
