CASE 15 - MCS along
coastal plain (few cells near S-Pol)
Microphysical scans 1930 - 2100 Z, 1h
30m
SYNOPTIC CONDITIONS SUMMARY:
Synoptic
feature map -
IOP status - No IOP
called at this time. There was a 250-300 mb
anticyclone just S of Texas. This anticyclone is
drove a 250
mb jet stream running N over the GOC and then eastward over the
northern edge of Tier 1. This jet is brought moisture up along coast and
SMO from the S, leading to extensive rainfall in those areas.
Day
0 forecast discussion text
Winds
200
mb - model.ETA.200408010000.00_200mb_wnd.gif
500
mb - model.ETA.200408011200.00_500mb_wnd.gif
700
mb - model.ETA.200408011200.00_700mb_wnd.gif
850
mb - model.ETA.200408011200.00_850mb_wnd.gif
EVENT SUMMARY:
24
h precipitation totals -
TIMELINE
OF DEVELOPMENT:
|
1900 |
A
few cells were popping up over SMO and along coastal plain. As time
progressed, convective coverage increased. 1939Z, GOES-10 Thermal IR
|
|
2130 |
Intense
convection over SMO was exhibiting increased organization. 2124Z, GOES-10 Thermal IR
|
|
2200 |
Mesoscale
system has taken on a nearly-linear structure, although deep convection is concentrated
in two separate maxima - on far north of S-Pol and the other to the E/NE. 2209Z, GOES-10 Thermal IR
|
|
2200-2330 |
Convective
maximum closest to S-Pol (perhaps an MCS in its own right) continues to
intensify. IR temps < -70C. Overall MCS movement to S. 2309Z, GOES-10 Thermal IR
|
|
0000 |
Intense
convective component near S-Pol waning. Activity continues along “linear”
system into the evening. 0024Z, GOES-10 Thermal IR
|
S-POL SUMMARY:
S-Pol
log - spol_073104.txt
SCAN
OVERVIEW:
|
1930 |
Begin Microphysical Scanning, Running
MicroNear135: Centered sector at
25 deg in order to capture echo 50 km to N. 1930Z, Base reflectivity
|
|
2030 |
Switching to MicroNear90: Centered sector at 15 deg. |
|
2100 |
End Microphysical Scanning, Running
ClimoNear: Scattered cells
developing to the E/NE of S-Pol. Several cells are within 60 km. 2100Z, Base reflectivity
|
|
2252 |
Cells
within 50 km of S-Pol to the N-NE have conglomerated. 2300Z, Base reflectivity
|
