the Forth Naturalist Historian - Forth Naturalist and Historian ...
the Forth Naturalist Historian - Forth Naturalist and Historian ...
the Forth Naturalist Historian - Forth Naturalist and Historian ...
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THE WEATHER OF 1998<br />
S. J. Harrison<br />
<strong>Forth</strong> <strong>Naturalist</strong> <strong>and</strong> <strong>Historian</strong>, volume 22 3<br />
Although very few wea<strong>the</strong>r records were broken during 1998, it was far<br />
from being an unexceptional year. The sequence of mild winter <strong>and</strong> early<br />
spring months continued, with <strong>the</strong> temperature in February reaching a<br />
remarkable 4°C above <strong>the</strong> long-term average. However, having encouraged <strong>the</strong><br />
early emergence of buds <strong>and</strong> shoots, <strong>the</strong> wea<strong>the</strong>r <strong>the</strong>n played <strong>the</strong> unpleasant<br />
trick of bringing a combination of killing frosts, heavy rain <strong>and</strong> snow in April.<br />
May promised a good summer ahead but this was not to be <strong>the</strong> case. The<br />
months June to August were cold <strong>and</strong> wet, <strong>and</strong> it was not until September that<br />
<strong>the</strong> wea<strong>the</strong>r eventually improved a little. A deluge <strong>the</strong>n followed in October<br />
<strong>and</strong> November <strong>and</strong> <strong>the</strong>re were widespread floods. On <strong>the</strong> whole 1998 was a<br />
cloudy, mild <strong>and</strong> ra<strong>the</strong>r wet year.<br />
Temperature <strong>and</strong> rainfall values in <strong>the</strong> following refer to Parkhead II although<br />
reference is also made to <strong>the</strong> records from Bridge of Allan <strong>and</strong> Fl<strong>and</strong>ers Moss.<br />
January Mild <strong>and</strong> very windy at first, becoming colder later<br />
Scotl<strong>and</strong> was almost obliterated by isobars on <strong>the</strong> wea<strong>the</strong>r map over <strong>the</strong> first<br />
four days <strong>and</strong> driving rain fell in strong to gale-force south-westerly winds.<br />
The 5th <strong>and</strong> 6th offered a respite from <strong>the</strong> wind <strong>and</strong> rain but <strong>the</strong> night-time<br />
temperature fell to –1.1°C (–2.3°C Bridge of Allan) by <strong>the</strong> morning of <strong>the</strong> 6th.<br />
There was ano<strong>the</strong>r spell of wet <strong>and</strong> generally windy wea<strong>the</strong>r until <strong>the</strong> 12th but<br />
<strong>the</strong> wind was from <strong>the</strong> south, which resulted in high temperatures being<br />
registered over this period. The maximum temperature exceeded 13.0°C<br />
between <strong>the</strong> 9th <strong>and</strong> 11th. The wind slackened on <strong>the</strong> 13th but <strong>the</strong> wea<strong>the</strong>r was<br />
generally unsettled with spells of exceptionally dull <strong>and</strong> wet wea<strong>the</strong>r. The 17th<br />
was <strong>the</strong> wettest day of <strong>the</strong> month, registering a rainfall of 17.7 mm (19.8 mm<br />
Bridge of Allan). Cold Arctic air came to Scotl<strong>and</strong> late on <strong>the</strong> 18th <strong>and</strong> light<br />
snow began to fall. The north of Scotl<strong>and</strong> was affected by very heavy snow but<br />
in <strong>the</strong> Stirling area <strong>the</strong>re was only a light dusting down to 150 m. Dull <strong>and</strong><br />
much milder wea<strong>the</strong>r returned on <strong>the</strong> 21st but after <strong>the</strong> 23rd <strong>the</strong> wea<strong>the</strong>r<br />
became calm <strong>and</strong> clear with night frosts for much of <strong>the</strong> remainder of <strong>the</strong><br />
month.<br />
February Exceptionally mild but very wet at times<br />
Winds remained relatively light <strong>and</strong> <strong>the</strong> skies relatively clear for <strong>the</strong> first two<br />
days. The grass minimum in Bridge of Allan fell to –5.7°C by <strong>the</strong> morning of<br />
<strong>the</strong> 3rd, but later in <strong>the</strong> day <strong>the</strong> wind began to freshen from <strong>the</strong> west, heralding<br />
a spell of wet <strong>and</strong> windy wea<strong>the</strong>r which persisted until <strong>the</strong> 16th. Winds were<br />
south to south-westerly <strong>and</strong> daytime temperatures exceeded 14.0°C on <strong>the</strong> 13th<br />
<strong>and</strong> 14th. Night-time temperatures were more than 10°C higher than <strong>the</strong> longterm<br />
average. Between <strong>the</strong> 12th <strong>and</strong> 16th <strong>the</strong> air temperature never fell below