Bobgram

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 8 June 2025
A review of last month's weather
A recent report summarises an investigation into how fast the planet's
land areas are heating up.
https://www.climatecentral.org/report/climate-change-and-the-escalatio
n-of-global-extreme-heat-2025

In particular it studies 67 extreme heat events in 247 countries in
the year ending 1 May 2025

The only areas with little change are the south coast of Australia,
parts of coastal Antarctica, a zone near Moscow, and spots in USA and
Brazil.

The study was able to calculate the contribution of Climate change,
using the Climate shift index. For more information on their
methodology please read the report.


Basically, the main impact of climate change on temperature is in the
equatorial zone.

TROPICS

Cyclone Barbara is travelling NW parallel to Mexican west coast and
expected to peel off to the west at 20S.
WEATHER ZONES
Rain accumulation this week from Windy.com shows a well-defined South
Pacific Convergence zone from Solomons to Samoa.
Wind and rain accumulation this week from Windy.com shows enhanced
SE winds in the Coral Sea and a well-defined squash zone near 25S
between Fiji and New Zealand.
LOWS and HIGHS
HIGH H1 is tonight centred on25S south of Fiji, and this week expected
to travel off to the east. Associated ridge may briefly cross New
Zealand on Monday night.
Deep Low now east of New Zealand is moving off to the east.
Low L1 is expected to form off southern New South Wales coast by
Monday and coast on Monday and deepen as it crosses NZ slowly from
Tuesday to Friday, with a southerly flow in Tasman Sea.
HIGH H2 in Aussie bight should move NE across New South Wales on
Thursday and weaken in the northern Tasman Sea by end of the week,
enhancing SE winds in the Coral Sea.
Gulf of Panama: light winds becoming mainly SW 15 to 20kt.
8N to 2N: Squally often westerly or SW winds and a sea drifting to
east
2N to Galapagos: Winds from between SE and S and a sea drifting to the
NW/west
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Contact is bob@metbob.com or text 64277762212.
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