146 CHOJI MAGONO 
cordingly, if any crystals are born at a com- 
paratively higher level, they do not grow rapidly 
until they fall into lower layers. As for the 
relatively dry regions above the mountain on 
the 30th and 31st as seen in Figure 6, it is not 
clear whether those regions have any connection 
with crystal forms observed or not. 
At time Sections A(21h40m, 27th), B(21h00m, 
28th), C(11h20m, 30th), D(21h380m, 30th), and 
E(16h10m, 31th) in Fig. 6, marked snowfalls 
were observed. For each time section, some de- 
scriptions should be offered in detail. 
Time Section A: After 21h00m on the 27th, 
large snowflakes were observed (Fig. 7); snow- 
flakes began to form at the Point 1000 level. The 
magnification factors of three pictures in the 
figure are common to all. It seems also that the 
snowflake formation began when snow crystals 
fell into the layer warmer than —10°C [Magono, 
1953]. This fall of large snowflakes was accom- 
panied by the occurrence of a thick moist air 
Fic. 5—Synoptic 850 mb map for 09h 00m, Jan. 
30, 1959 layer as seen in Figs. 6 and 7. 
ane Ca ee ee *8 | | o MEK] Pr.1000 
P1000) est T*hOe  [One# Y Mee eee 
ex | Br Sa ae he i 
eit tis ‘ si 8 —— * 3 ¥ HK Pr 500 
*_ —— * 8 fh 44 —— # BBII I } 
500] KE OU FRED UH 
8 i HF te eis 3 | Bm % ae he 
OOS | # > x | | Fs 
Pee «| ae 
al et ae - eee oo * | 2 | FM D5 Pr. 100 
Pr 100 cial ial 2 ek WORK 
| | 8 0 A em 
| A B D *E 
}AO% 60% 100% (ICE SATURATION) | A 
= 
£ He — Pr.1000 
2 1 ean 
S Hi — Pr. 800 
t 4, — Pr. 500 
= 300 
- Ni Pr. 
. — Pt 100 
70 90 
03900 2100 0900 2100 0900 2100 0900 2100 0900 2100 og00 2100 
26 th 27th 28th 29th 30th 31st 
Jan., 1959 
Fria. 6—Time cross section considering the observations at Mt. Teine; crystal types observed at each 
point are shown in the upper part 
