ALTITUDES 22 " 120° thru 240° DIRECTIONS 106° thre 260° §0,0Q0 to 30,000 3.4% (26) 10.8% (51) 50,000 ts 10,000 bh (2) 2.3% (11) 50,000to 20,000 Notes 2.16 (10) 6.08 (29) Percentage frequency of winds of given directions occurring sinul- taneously at all levals balow 50,000 feet. period 1 January through 14 ay 1954. (474 observations during Cases in parenthosis.) Table 2 following, shows that winds with southerly componants havo occurred as frequently during these mnths of 1954 as they did in past years. «19KS Note: TABLE 946, 1950, 1951 & 1952 . 1954 -3000 ft. 32% 10,000 ft. 30% 25,000 ft. 21% 25,000 ft. 26 50,000 ft. 35% 50,000 ft. 40% Percentage frequency of winds with southerly comp:nents January, February, March, April through aid-May 1954 as comparad to previcus years. From the above tables, the following c.nclusions arc drawn: 1. The upper winds during CASTLE were as favorable as past years 2. ‘Winds with proncunced southorly cumponents (SE through SW) at all for such an oporation; this was a fairly ‘normal" yaar. svels between 10,000 and 50,000 fect cccur simultanecusly about se every fourteen times (i.e. 2 times in 28 cases) that winds rh southerly components occur at 50,000 feet. “Winds with proanced southerly components at all levels can be expected to cccur out twice per honth. 3. 32AVO and ROMEO events of CASTLE occurred on tho best possible days during March though a mre favorable day for BRAVO event would have been 28 February local time. ROMEO day was the mst favorable of the entire month. KOON was detcnated on the next possible day. While UNION and YANKEE devices were detcnatod on the next cecurrences of acceptable wind ccnditions, the conditions were not as markedly scceptable as on former test days. The