Bob Blog 6 March

Bob McDavitt's ideas for sailing around the South Pacific.
Disclaimer: Weather is a mix of pattern and chaos; these ideas are from the
patterned world.

Compiled Sunday 06 March 2022

I am now doing daily weather updates for Lisa Blair who in now 2 weeks into
her attempt at the Around Antarctica race. See
lisablairsailstheworld.com/blog, She is also deploying buoys and sea-drones
and taking sea samples as part of this adventure, but the project is still
underfunded and people are asked if the would be willing to promote their
club or firm by sponsoring a degree of longitude which will become sponsor
of the day as she circumnavigates the world.


REVIEW OF THE LAST MONTH (Feb2022)

Sea Surface temperature anomalies from psl.noaa.gov/map/clim/sst.shtml
The cool eddies along the eastern equatorial Pacific that signify LA Nina
and now relaxing. Elsewhere over the North and South Pacific are yellow and
red warm areas, with Tasmania area more intense than last month, and other
hotspots remaining around South Africa, South America, and Fiordland in New
Zealand.
To see how the annual weather cycle and the seasons are working out, we can
check the average isobar maps for past 30 days and their anomaly from
psl.noaa.gov/map/images/fnl/slp_30b.fnl.html
There has been a slight intensification in the subtropical ridges in both
hemispheres, otherwise not much change.
The anomaly map shows little change. Notably the North Tasman Sea is still a
breeding ground for lows.

Zooming into the NZ area
These maps show the subtropical ridge well south of the Australian Bight.
There are new 1029 isobar Highs just east of South Island and southwest of
Australia, showing an intensification. The Antarctic High has also
intensified.

TROPICS
Looks quiet for now. Last week the coastal trough along Australia's east
coast activated with record rainfall and flooding between Bundaberg and
Sydney. There was also heavy rain in the NW from TC ANIKA which made
landfall onto Kimberly.
That low which bothered New Caledonia for much of last week briefly become
TC EVA and is still on the weather map but has weakened.

WEATHER ZONES
SPCZ=South Pacific Convergence zone.
The SPCZ stretches from PNG to Vanuatu/New Caledonia to Fiji/Tonga to
Southern Cooks.

HIGHS and LOWS
Low1 to SE of New Caledonia ( ex TC EVA) is weakening and travelling slowly
SW.
A tropical Low L2 to south of Niue is expected to go SE then SW.
The ridge between these lows may provide an avenue of light winds between
Fiji and NZ this week.
High H1 in south Tasman Sea is moving steadily east along45S
L3 is forming inland with the East Australian coastal trough and expected to
deepen off Sydney buy Tuesday and then continue southeast to south of NZ.
After that High H2 is expected to travel east into the Tasman sea along 40S,
bringing an easterly flow for a few days across the northern Tasman sea, OK
for travelling from NZ to Aus.
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If you would like more detail for your voyage, then check metbob.com to see
what I offer.
Or Facebook at /www.facebook.com/metbobnz/
Weathergram with graphics is at metbob.wordpress.com (subscribe/unsubscribe
at bottom).
Weathergram archive (with translator) is at weathergram.blogspot.co.nz.
Contact is bob@metbob.com or txt 64277762212
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