UO"LZ EVENT daerd CPERATowHARDTGK 1, FOLLY was Jetonatad at G63CM, 21 “ay 1958, a thoty tositccned £,2C0 fast weat of Yvonne. This was a barze The first fix vas cbtainsd at H+}4 inutes, vhon aireraft rioerts indicated that the cloud waa still ‘“sithin a few miles of ground cern and was starting to move tio the south= “aut very slowly, ‘eaxizrim clond height was 15,000 fet. The cloud “seane stabiliced by M15 minutes with ths top at 12,000 faet ard the bace at 7,500 fse%, At d+30 mimites, tha cloud tep nad dascended to vs& 9,000 Peet, vith ganeral movanan: “o the vsstereutiniest. Soefore tha hour vag uo, the tlovd hocseme too difsussd for redar or visual tracking... 20 The @2¥ barriar patrol s2perted on tine and shuttled betusen Bruce and Levey Islends, At H+55 miautss, he centacted tha scutheia cdes of the sleud over Lovey at 5,069 fost ond reportad 500 ur/hr, 3, A beliespter survey vas initiated at dc30% along the sast and vorth islands of Entuetes., A asia reading of 5,990 mr/or vas snecdded at 1090 Psat abova ground zero. 4. 20PU had predictad that ths islaads in the corthaast quadrant would lie within ths 10C2 dose ai2a3 hovovar, the unoxpeetadly low staoilised cloud hotght caussd alirest all the callout to rocein in tke “rade wind Levela, This eaused te “allo.t pattern to lie within the vacials 230 jlegress to 320 dagrens, Lith th: oS 35 :altes, iitn racial distance of cpproximately extention of bronnt, oniy Janat, Leroy ond the islsrads in Setwaen rtcaivad substantial fallout. BLSY Copy 3 \ELABLE of