262 80 6MB
English Pages [119] Year 1988
The Yacht
The
Yachtsman’s
WEATHER
GUIDE
re
coarmioul
Wf.
« IGIUO SSHTATW ~~ _
:
—* _
|
The Yachtsman’s
WEATHER GUIDE Ingrid Holford
Airlife England.
Front
cover:
Moderate,
force 4 wind,
small waves
Copyright © Ingrid Holford First published in Great by Ward Lock Limited.
Britain
becoming
longer,
11-15 knots.
Patrick Roach
1988 in 1979
This second revised edition published by Airlife Publishing Ltd. in 1988. All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical including photocopying, recording or by any information storage and retrieval system, without permission from the Publisher
Printed
in writing.
in England
by Livesey
Ltd.,
Shrewsbury.
Airlife Publishing Ltd. 7 St. John’s Hill, Shrewsbury,
England.
Contents
Preface Introduction
1 Transmission of heat 2 Local winds
Atmospheric pressure Synoptic charts and pressure winds Water vapour in the air Dew, frost and fog, by contact with cold surfaces
Clouds and showers, in thermals
by lift over high ground and
Clouds, rain and snow, by lift in converging winds Isobars around low pressure
Isobars around high pressure 11 Forecasting with modern technology 12 Making your own weather chart Index
we,
op
ole =e
: ee
ie
_
eo | eee)
r
aan
j a 4 en 0° og
w=
in 6
naam wumee fat olvemiag
a
-*
am wen
8
Ft
es
aagrame t
Keene) vara Lad -how ioe eke? ont
bu ape ae
bee
ptaase ®
“
Introduction and Acknowledgements
This book is written for everyone who goes afloat and is at the mercy of the weather. | have stretched the word yacht to include everything from small dinghies to large cruisers, both sailing
vessels and powered craft. I have also used the term yachtsman to include yachtswomen and yachtschildren, so that I may use he and him for everyone, to keep the text easy to read. In this revised edition, I have taken heed of constructive comments made by reviewers 6 years ago, and tried to simplify some of the difficult topics, highlighted for me by sailing instructors and yachtsmen to whom | have lectured. Meteorology is an imprecise science and forecasts are sometimes wrong, but rarely from negligence. The atmosphere is so vast that it cannot be monitored completely, even with satellites and remote self-recording instruments, and weather has an almost human ability to change its mind when a yachtsman is most vulnerable. That is when it is important to know how to make and use a weather chart from the Shipping Bulletin, in order to cope with deteriorating weather which may advance quicker than a yacht can travel.
Forget that much of meteorology is beyond the comprehension of most of us. Simply learn how to use the information provided by the professional, add your own local knowledge and logical reasoning based on the facts in this book, and the
result will be forecasting at its best. I should like to graphs to this book, my own. And my who have been so finished book.
thank those who have contributed photoacknowledged underneath all which are not especial thanks go to Airlife Publishing Ltd successful in converting my ideas into the
in ridPoull
ee
sesighat ten
|
ee
* a
J
m~
;
2
en
se
J
«
mie
fod