POST-SHIT DEATHER: ; a. ; The weather after shot time detericrared rapidly due to insures local cloudiness. The winds elo*t for Eniwetok and Rongerizx were less favorable from a fallout point of view (Incl No. 1 and 2). b. Chart No. 11 is the commited air particle’ trajectories for 2247 day, based on data available through 3433 hours. Azslification of other levels than those presented is in order since the setter free , the surface to 25,000 feet was in @ continual flux. The 25,000 foot } From 12,¢% to : trajectory was essentially the same for 30,000 feet. 18,000 feet the trajectories lie between the 10,000 and 20,050 foot ; level patterns with the 18,9¢° foot most lixe the 20,000 foct trajectory and the 12,000 foot most like the 10,000 foot trajecstorr. Is other words, between 20,020 and 20,00) feet there must have beex ¢=:siderable cispersion, with the 20,000 fost level having the mom ne> therly component of mtion. From 6,000 to &,000 feet, the trajectories 2gein start showing northerly components, with the 6,000 foot ani de- 5. Ey &e low trajectories being generally froz the ezst northeast. . DISCUSSION: a Briefings: (1) Tae outlook on the morning of 27 Petre ry was very feverebdle from the redsefe point of view, The win¢cs for shot tine were fcre- cast to be easterly from the surfese through 20,000 feet, so.th= easterly at 30,00 feet, southerir at 67,000 feet, anc stuthesterly at 50,090 feet. The situation wes cuenginz sligztlr; 27 Fetrmuery would have been an ideal shot day (Incl Me. 3).