CASE 24 - Afternoon
convection over SMO
Microphysical scans 2100 - 2300 Z, 2h
SYNOPTIC CONDITIONS SUMMARY:
The midlevel high
pressure system over SW US weakened and displaced southward. Convergence line in NW Mexico
and upper-level divergence favored convective processes in Sonora and
Chihuahua. The convergence line
which crossed the country from Tamaulipas to West of Mexico associated with
the tropical wave # 31 produced the severe storm in Nayarit - S of Mazatlan
Day
0 forecast discussion text
Winds
200
mb - model.ETA.200408120000.00_200mb_wnd.gif
500
mb - model.ETA.200408120000.00_500mb_wnd.gif
700
mb - model.ETA.200408120000.00_700mb_wnd.gif
850
mb - model.ETA.200408120000.00_850mb_wnd.gif
EVENT SUMMARY:
24
h precipitation totals -
S-POL SUMMARY: Took 2h of microphysical scans of afternoon convection over the SMO.
RHIs through various cells found overshooting tops and descending rear inflow
jets. Ended microphysical scanning once convection moved in greater azimuthal
coverage was needed.
S-Pol
log - spol_081104.txt
SCAN
OVERVIEW:
|
2015
Z |
Convection
developing over the SMO. 2024 Z, GOES-10
|
|
2100
Z |
Beginning Microphysical Scanning,
Switching to MicroFar135: Centered
on 67 deg, RHIs at 97 & 99 deg. 2100 Z, Base reflectivity
|
|
2122
Z |
Captured
nice overshooting top in an RHI at 104 deg. 2130Z, Base reflectivity
|
|
2137
Z |
Nice
rear inflow jets observed from RHIs at 105 and 107 deg. |
|
2223
Z |
Nice
overshooting top and upper level divergence in RHI at 92 deg. 2230Z, Base reflectivity
|
|
2300
Z |
End Microphysical Scanning, Switching
to ClimoFar: Cells have moved
farther into S-Pol range and are occupying a swath 135 deg - switching back
to 360 deg coverage. 2300Z, Base reflectivity
|
