CASE 35 - Mtn and seabreeze diurnal convection w/ good organization

8/19-20/04

Microphysical scans 2315 - 0215 Z, 3h

 

 

SYNOPTIC CONDITIONS SUMMARY:

 

Day 0 forecast discussion text

 

Winds

200 mb - model.ETA.200408200000.00_200mb_wnd.gif

500 mb - model.ETA.200408200000.00_500mb_wnd.gif

700 mb - model.ETA.200408200000.00_700mb_wnd.gif

850 mb - model.ETA.200408200000.00_850mb_wnd.gif

 

Mazatlan SkewT - ops.SkewT.200408200000.Mazatlan_MX.gif

 

 

EVENT SUMMARY:

 

0054Z, GOES-10 Vis

 

24 h precipitation totals -

 

 

S-POL SUMMARY:

 

S-Pol log - spol_081904.txt - spol_082004.txt

 

SCAN OVERVIEW:

 

8/19 2245 Z

Running ClimoNear: Mountain convection showing increased organization and linearity.

 

2245Z, Base reflectivity

 

2315 Z

Begin Microphysical Scanning, Running a test sequence - rain map plus two 170-deg sectors, centered on the mtn and other land convection: Resolution is a bit under 2 deg per elev step. This will at least get us two updates per 15-min cycle without giving up a lot of covg. Ocean is bone dry right now, save for ... well, you know, all the water in it.

 

2315Z, Base reflectivity

 

0015 Z

Manual reset, bringing down top angles and improving vert res as nearby storms have collapsed.

 

0015Z, Base reflectivity

 

0030 Z

Manual reset. Continue to bring down top angle and improve vert res. Strongest activity is coalescing far to our north, as well as due east. A lot of good cells out there, high reflectivity with good phase shift, but no MCS-like organization just yet.

 

 

0100 Z

Manual reset. Northern system continues to coalesce and organize. Eastern system looks good too but is not as big.

 

0100Z, Base reflectivity

 

0135 Z

New development near 80 deg, 60 km from radar - not topped, raising upper angle on last scan.

 

0130Z, Base reflectivity

 

0156 Z

Eastern convection looking pretty good. Northern convection also holding strong but pretty far away. Raising upper angles at expense of vert res.

 

0200Z, Base reflectivity

 

0215 Z

End Microphysical Scanning, Switching to ClimoNear: Northern and SE storms are getting too far apart to scan with this sector anymore.

 

0215Z, Base reflectivity