CASE 21 - Afternoon
convection over SMO exhibiting some organization
Microphysical scans 2115 - 2345 Z, 2h
30m
SYNOPTIC CONDITIONS SUMMARY:
Upper-level (250 mb) high located just S of the AZ/Mexico border was
pulling moisture eastward towards the coastal areas. Zones
6 & 7 (includes IV#9 moving NWward, now west of Baja IV#10 moving Wward, set to move off
Day
0 forecast discussion text
Winds
200
mb - model.ETA.200408090000.00_200mb_wnd.gif
500
mb - model.ETA.200408090000.00_500mb_wnd.gif
700
mb - model.ETA.200408090000.00_700mb_wnd.gif
850
mb - model.ETA.200408090000.00_850mb_wnd.gif
EVENT SUMMARY: Scattered convection over SMO, showed some organization.
2339Z, GOES-10
2339Z, GOES-10 Thermal IR
24
h precipitation totals -
S-POL SUMMARY: Captured lifecycle of a group of cells that developed to the E/SE over
the foothills and moved NW-ward towards S-Pol. Cell
conglomerate exhibited a NE-SW oriented linear orientation throughout much of
its lifetime. Other moderately intense cells formed to the N, which were
captured by sector scans at times.
S-Pol log - spol_080804.txt
SCAN
OVERVIEW:
|
2030
Z |
Cell
development over foothills to the S/SE - a new convective line to the SE at ~120-150
km, aligned SW-NE. PID shows some hail in higher reflectivity cells. Cells
moving NW-ward, towards S-Pol. 2030 Z, Base reflectivity
|
|
2115
Z |
Begin Microphysical Scanning, Switching
to MicroFar135: Centered on E/SE
sector to capture lifecycle of loosely organized cells at 80-120 km. 2115Z, Base reflectivity
|
|
2130
Z |
Despite
new cell growth to N/NE, keeping center on cells to S/SE to capture full
lifecycle. RHI @ 109 deg yielded high reflectivity and stratiform region. |
|
2145
Z |
Re-centered
sector on 82.5 deg, RHI on 124 deg. 2145Z, Base reflectivity
|
|
2200
Z |
Switching to MicroNear135: High reflectivity (30+ dBZ
up to 16 km) cell at 30 km to SE (log says SW, but can’t verify on available
radar images). 2215Z, Base reflectivity
|
|
2227
Z |
Cell
close to radar has strong low-level convergence. |
|
2250
Z |
Cells
to N/NE continued to develop - keeping eye on them. Keeping sector scans on S/SE
storms to complete lifecycle study. 2254Z, Base reflectivity
cross-section (cell to SE)
2254Z, Base reflectivity
cross-section (cell to SE)
|
|
2322
Z |
Nice
line to NE has formed out of isolated cells. RHI at 17 deg. 2330Z, Base reflectivity
|
|
2345
Z |
End Microphysical Scanning, Switching
to ClimoNear: System to SE dying. Still scattered cells to N/NE. |
