1 area. This ator~ situation appeared to have no previous discernible hisbory. The cause of this storminess was found to be in the develoy ment of a zone of convergingwinds. The northeast trade winds from more northerly latitudes were colliding with easterly tindO from equatorial latit~es result- in a zone of heavy cloudiness ad showers. The stormy area was expected to move westward with the trade winS flow. The 27th of April was scheduled as Yoke minus three. Considerable amounte of low, medium and high cloudinesswas present on this d~, but the main stormy area had passed westward as expected. The outlook forecast for Yoke day was prepared. Suitable cloud conditionsnot to exceed 5 tenths for Yoke day were anticipated. There would be a few widely scattered showers but no interferenceto the operationwas expected. The wind structurewas forecaet to be a normal trade ad anti-trade flow. It was not possible to imiicate at this tim with certainty whether this wind flow would or would not be suitable for firing. Should the northerly component in the anti-trades continue to persist, Yoke Day as scheduled would be non-operational. This informationwas presented at ~OOH, Z? April (Yoke mime three) to the Commander JTF 7 and his etaff at the scheduled formal briefing. Due to the critical nature of the winds, the Commander JTF 7 requested a supplementaryweather briefing for Yoke minus two at 1700M. There was no change in the original outlook forecast indicated at this weather presentation. On the following day 29 April (Yoke minus one) there was only SECTXON XII 45