CASE 31 - Mature to
decaying stages of a weakly organized system that developed 100km N of S-Pol
Microphysical scans 1400 - 1615 Z, 2h
15m
SYNOPTIC CONDITIONS SUMMARY:
Tier 1 under
northwesterly upper flow regime - rare for mid-August. NWly flow did not appear
to alter the convective cycle over
Day
0 forecast discussion text
Winds
200
mb - model.ETA.200408171200.00_200mb_wnd.gif
500
mb - model.ETA.200408171200.00_500mb_wnd.gif
700
mb - model.ETA.200408171200.00_700mb_wnd.gif
850
mb - model.ETA.200408171200.00_850mb_wnd.gif
MESOSCALE SUMMARY: A convective system developed out of range of S-Pol to the NW at ~0930Z,
propagated vert slowly to the SE. System peaked around 1130 Z, continued to
dissipate. Around 1345Z, new development was triggered to the SW of the
dissipating system (over the GOC), at ~100 km to the N/NW of S-Pol. This cell
intensified over the GOC, moving almost due S, until it dissipated by ~1600Z.
1424Z, GOES-10
24
h precipitation totals -
S-POL SUMMARY:
S-Pol
log - spol_081704.txt
SCAN
OVERVIEW:
|
0600
- 1230 Z |
Convective
activity has been flaring and redeveloping to the N/NW of S-Pol beyond 140
km. 0830Z, Base reflectivity
|
|
1245
Z |
Switching to ClimoFar: System to the N looks more convective. 1245Z, Base reflectivity
|
|
1300
Z |
Cell
at 300 deg at ~100-120 km intensifying. Core of 45 dBZ extends to 14 km. 1300Z, Base reflectivity
|
|
1400
Z |
Begin Microphysical Scanning,
Switching to MicroFar90: Centered
on cell to the W/NW at 100 km range. Cell approaching 55 dBz at 1.98 deg elev
angle. Large anvil blowoff. 1400Z, Base reflecitivity
|
|
1445
Z |
Recentered
sector at 280 deg. Storm is moving due S, currently E of S-Pol at 70 km. Mid
50’s dBZ and signature of ZDR column. 1445Z, Base reflectivity
|
|
1521 |
Storm
is decaying, but there is new intensification just north of the original
cell. Still a large cirrus shield. Still in MicroFar90 centered on 280deg. 1515Z, Base reflectivity
|
|
1536 |
System
has pretty much died, but for now we will remain in microphysical mode incase
things reintensify. Will reevaluate in about 30 minutes. 1530Z, Base reflectivity
|
|
1615
Z |
End Microphysical Scanning, Switching
to ClimoFar: Remnants to the E are
dissipating, only anvil left. 1615Z, Base reflectivity
|
