CASE 19 - Scattered convection over foothills

8/6/04

Microphysical scans 2115 - 0045 Z, 3h 30m

 

 

SYNOPTIC CONDITIONS SUMMARY:

 

IOP status - This is during IOP#7 (see report). MCS development along Sonora/SInaloa favorable during this time, and a gulf surge was expected. MCSs did develop as predicted, however, no gulf surge was detected during the IOP.

 

TW#29 impacted S GOC early on 8/6/04, shifting winds from northeasterly to southeasterly.

 

 
 

 

 

 

 

 

 


Day 0 forecast discussion text

 

Winds

200 mb - model.ETA.200408070000.00_200mb_wnd.gif

500 mb - model.ETA.200408070000.00_500mb_wnd.gif

700 mb - model.ETA.200408070000.00_700mb_wnd.gif

850 mb - model.ETA.200408070000.00_850mb_wnd.gif

 

Mazatlan SkewT - ops.SkewT.200408062100.Mazatlan_MX.gif - ops.SkewT.200408070000.Mazatlan_MX.gif

 

 

EVENT SUMMARY: Scattered cellular activity along the SMO during the late afternoon / early evening. Cell motion is generally westward, which is consistent with 500 mb winds.

 

2224Z, GOES-10 Vis

 

24 h precipitation totals -

 

 

S-POL SUMMARY:

 

S-Pol log - spol_080604.txt - spol_080704.txt

 

SCAN OVERVIEW:

2115 Z

Begin Microphysical Scanning, Switching to MicroFar135: Cells firing over the SMO. Centered sector scans on 60 deg.

 

2115Z, Base reflectivity

 

2115 - 2300 Z

Taking RHIs of stronger cells: Set to 50.5 and 46 deg at 2115Z, to 98.6 deg at 2210Z, to 97.8 deg at 2222Z, to 100.5 deg at 2250Z. The cell at 97.8 deg / 2222Z has 50 dBZ core.

 

2215Z, Base reflectivity

 

2330 Z

Stratiform region to the SE of cells not being completely captured by sectors - recentering on 75 deg and setting RHI to 103.8.

 

2330Z, Base reflectivity

 

2345 Z

RHI at 94.5degrees through bright-band.

 

Base reflectivity

 

0045 Z

End Microphysical Scanning, Switching to ClimoFar: Cell activity waning.