Apr. 1, 1925 
Relation of Weather to White Pine Blister Rust 
601 
causes local variation in the direction 
of surface winds. This is particularly 
marked in a broken country such as 
British Columbia and the Western 
States. 
There is also considerable variation 
in the direction of wind in a given 
season in different years. For exam¬ 
ple, meteorological records for the 
northwest coast bear out the state¬ 
ments of close observers that a late 
spring and a dry summer are accom¬ 
panied by an unusual aggregate of 
northerly winds. Tables IX and X 
show that in May and June the num¬ 
ber of northerly winds, that is, those 
from the northeast, north, or north¬ 
west, at Seattle and Vancouver, is 
very considerable. 
Table IX.— Percentage of northerly winds at Seattle, Wash. 
Year 
1917 
1918 
1919 
1920 
1921 
1922 
1923 
May....- 
28.8 
23 
30 
27 
43 
27 
26 
June---- 
36 
49 
42 
34 
27 
44 
41 
Table X. —Percentage of northerly winds at Vancouver, B. C. 
Year 
1913 
1914 
1915 
1916 
1917 
1918 
1919 
1920 
1921 
1922 
1923 
May.. 
12 
18.2 
13.1 
19.5 
11.5 
13 
15.1 
14.3 
20.7 
24.8 
16.1 
June.. 
23 
25.1 
13.2 
17 
23.1 
27.6 
23 
33.3 
24.5 
38.4 
24 
When taken in connection with 
Tables IX and X given above, the an¬ 
emometer records for 1922 show fairly 
well the amount of wind movement 
from the different directions at repre¬ 
sentative stations in the region under 
consideration. Table XI shows the 
total number of miles which the wind 
traveled from each of the eight points 
during May and June of 1922: 
Table XI. —Anemometer records showing the number of miles which the wind 
traveled from each of eight points during May and June, 1922 
Direction 
Station 
N. 
NE. 
E. 
SE. 
S. 
SW. 
W. 
NW. 
Total 
Vancouver, B. C.: 
Miles 
Miles 
Miles 
Miles 
Miles 
Miles 
Miles 
Miles 
Miles 
May... 
41 
211 
749 
769 
312 
398 
270 
706 
3,456 
June...__ 
72 
105 
443 
445 
154 
310 
348 
885 
2,762 
Steveston, B. C.: 
1,078 
6,290 
May. 
70 
189 
739 
1,450 
1,172 
973 
619 
June___ 
204 
22 
846 
1,235 
999 
364 
582 
1,262 
5,514 
Victoria, B. C.: 
27 
8,840 
May____ 
724 
633 
212 
387 
1,304 
4, 739 
814 
June... 
247 
234 
61 
63 
1,966 
6,191 
241 
31 
9,034 
Summerland, B. C.: 
716 
1,164 
6,060 
May... 
904 
303 
510 
1,168 
430 
865 
June. 
1,350 
99 
83 
571 
83 
1, 273 
720 
2,497 
6,676 
Seattle, Wash.: 
307 
7,489 
May.. 
1,103 
626 
383 
825 
2,246 
1, 468 
531 
June___ 
1,119 
523 
14 
375 
1,253 
717 
661 
730 
5,392 
Portland, Oreg.: 
685 
2,094 
6,097 
May____ 
702 
199 
832 
197 
561 
827 
June.... 
1,082 
76 
29 
127 
184 
177 
185 
2,144 
4,004 
Roseburg, Oreg.: 
May__ 
811 
139 
28 
34 
167 
346 
271 
694 
2,490 
June...- 
1, 381 
89 
31 
6 
22 
60 
130 
636 
2,355 
Red Bluff, Calif.: 
M ay _ 
1,060 
36 
19 
1,045 
246 
38 
291 
2,213 
4,948 
June_ 
323 
40 
112 
1,665 
866 
50 
34 
529 
3,619 
San Francisco, Calif.: 
4, 788 
776 
7,677 
7,200 
May.. 
June___ 
207 
81 
28 
105 
77 
1,615 
1,581 
32 
20 
36 
23 
5,420 
88 
19977—25t-2 
