Hi Clyve and Harald

just a quick question regarding what Clyve asked if there was an area of anti-cyclonic rotation in the initial stages would it be just variable winds in the area till the vortmax became reasonably established as thats what it seems to look like to my eyes (please correct me if I am way off track.) Also reading up on vortmax systems it shows an indication they are of a shortwave variety would Coriolis effect be relatively weak in initial stages ie as it is a "smaller area" system but come more into play as it establishes and becomes slightly larger or is Coriolis effect just a constant force regardless of the "size" of a system and the only correlation is that it is weaker near the Equator and stronger as you move towards the Poles?

Subject: [austpacwx] Re: V/Max NSW take 2 [SEC=UNCLASSIFIED]
Date: Mon, 12 May 2008 13:31:32 +1000
From: H.Rich...@bom.gov.au
To: austpacwx@googlegroups.com

Hi
Clyve,

It
seems the Central Tablelands in NSW are hosting a textbook vortmax.  WV
loops
show
me cyclonic (clockwise) rotation around an upper-level cold pool that is at
least as cool as
-19 C
(as per 23z/11 Wagga sounding), but more likely around -22 C as per latest
Europena model (EC) run
which shows the vortmax in the right place.  Wind speeds
around the
vortmax are light, around 15 kts at 500 hPa based on the EC.  
The 23z/11 Wagga
sounding shows low-level NW flow overlaid by easterlies at
midlevels (southern half of the vortex),
with
the flow returning to westerlies near the tropopause.  That would suggest
the vortex is
maximised in the midlevels.

At
0250z/12 (12:20 EST) there are some tall thunderstorms just south of Blackville,
NW.

Based
on the EC model, the vortmax will start moving into the Hunter Valley later
today,
and
exit the coast by later tomorrow.  Interaction with slightly better
boundary layer moisture
near
the coast might result in slightly better storms, but without more deep-layer
shear these storms
won't
be too outlandish.

Harald

  From: austpacwx@googlegroups.com
  [mailto:austpacwx@googlegroups.com] On Behalf Of Clyve
  Herbert
Sent: Monday, 12 May 2008 09:50
To:
  austpacwx@googlegroups.com
Subject: [austpacwx] V/Max NSW take
  2

  Hi all...After a closer look at the
  water vapour and infra red the upper V/Max over central east NSW has a very
  odd rotation characteristic....I hope my eyes are not deceiving me but appears
  anticyclonic ? in rotation....would be good if someone else could confirm this
  odd feature...regards Clyve
  H<BR

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