CASE 26 - Weak
convection along landbreeze front
Microphysical scans 0915 - 1115 Z, 2h
SYNOPTIC CONDITIONS SUMMARY:
Upper level ridge axis was
shifting to the SW of Baja and a small PVA zone associated with old IV#10
was located over
Day
0 forecast discussion text
Winds
200
mb - model.ETA.200408141200.00_200mb_wnd.gif
500
mb - model.ETA.200408141200.00_500mb_wnd.gif
700
mb - model.ETA.200408141200.00_700mb_wnd.gif
850
mb - model.ETA.200408141200.00_850mb_wnd.gif
EVENT SUMMARY: An evening landbreeze developed and propagated
offshore at around 0730Z. As this boundary moved offshore, it spawned a few
moderate-intensity cells. Overall, convection was short-lived and
disappointing.
24
h precipitation totals -
S-POL SUMMARY:
S-Pol log - spol_081404.txt
SCAN
OVERVIEW:
|
0730
Z |
Land
breeze propagating offshore. |
|
0915
Z |
Begin Microphysical Scanning, Switching
to MicroFar90: Hoping to capture
the lifecycle of cells developing along landbreeze
offshore of Mazatlan. Strongest cell (45-50 dBZ) is at 156 deg / 70 km. Cells now forming close (30
km) to the radar. 0915Z, Base reflectivity
|
|
1015
Z |
Switching to MicroNear90: Switched in order to top cell at 35 km - far cell
dying. 1015Z, Base reflectivity
|
|
1045
Z |
Switching to MicroFar90: Nearby cell is weakening, less deep. 1045Z, Base reflectivity
|
|
1115
Z |
End Microphysical Scanning, Switching
to ClimoShallow: Landbreeze cells have died out. 1115Z, Base reflectivity
|
