THE METEOROLOGY OF GLEN NEVIS 



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from which definite conclusions can be deduced. It will be seen that there is a gradual 

 diminution in the frequency of east winds, and an increase in south-east and north-west 

 winds, as the day advances. South-east, south, and north-west winds show a decided 

 maximum, and north, north-east, and east winds a decided minimum, at 9 p.m. (21 h ). 



Strength of the Wind. 



The strength of the wind varies little, being lowest at 2 p.m. and greatest at 9 p.m., 

 but the variation is very small, less than one-tenth of a mile per hour. From 4th 

 December to 28th February the maximum pressure, as registered by the Dines 

 anemometer, gave the following as the mean maximum strength of the wind during 

 the day period, 9 a.m. to 9 p.m., and the night period, 9 p.m. to 9 a.m., 27th February 

 being excluded owing to the exceptional features of the gale of that day : — 





Miles per Hour. 



Day. 



Night. 



Whole Period, 



December 



January 



February 



27 

 21 

 15 



27 

 21 

 16 



32 



28 

 23 



Hence there is no difference between the strength of the strongest gusts during the 

 day and night. The following table gives the maximum velocity in miles per hour 

 and the average velocity of the wind on the stormiest day in each month : — 





Maximum Velocity. 



Date. 



Highest Mean Velocity. 



Date. 



December . 



January 



February 



04 miles per hour. 

 67 

 117 



13 

 9 



27 



15 miles per hour. 

 7 



18 „ „ 



9 

 6 



27 



The feature of the wind is its gustiness, and these gusts are separated by long- 

 intervals of calm, or very light airs. The highest velocity recorded was 1 1 7 miles per 

 hour on the morning of the 27th February, at which time a full gale reaching force 10 

 at some hours was blowing from the south-east on Ben Nevis. The gale was severely 

 felt in the Glen, and considerable damage was done at Glen Nevis House, where some 

 buildings that had stood for twenty years were demolished about 8 a.m. The strength 

 of the wind was found to vary greatly in different parts of the Glen, being greatest at 

 such places as the Garochar and at the highest point of the carriage drive near Allt 

 Eoghain, where a steady wind of force 8 to 9 was experienced. The highest mean 

 velocity shown by the Dines anemometer for this day was 37 miles per hour from 

 10 a.m. to noon. After 1 p.m. the wind at the station fell considerably, but a heavy 

 gale was found to prevail in those parts of the Glen exposed to the east. 



