on SULEARY OF WSATHOR STyJATIN: FOR ERave suce Eee i. GSi=PsAL. ee eee eee ee mE eee This susrery presents the weather situstion es existed prior to, at, and just efter BRAVO shot time, for the general arca of the Marshall Islands, with specific reference to Bikin‘é ant tne SHRILP shot site. 2. P2zeSHOT WaATHER. a. General Srmostic Situation (1) SURFASE - The surface chart was dominated by a high pres- sare cell located at aprroximately 34 degrees north 171 degrees east with a central pressure of aprroxinately 1030 L335. treugt, oriented northeast - southwest lar just off the coest of J:.pas. linimz pressures in low latitudes lav just along the equztor. Flow over the Lershell Islands aree wes the ezst northeast trade flow, with no marked regions of convergence or divergence. Ko. 1). (Chast During the preceding several days the high pressure cell had been moving slowly eastward, with a slight increase in the central pressure. . (2) UPPER LEVEL CHARTS. From approximately 25,000 to 55,000 Jeet the flow pattern was dominated by & clockwise rotation cexterec near 5 degrees north 175 degrees east. This systec wes essentially vertical fron 30,000 to 50,000 feet (Chart No. 4). ‘The flox ez these levels, underthe influence of this dominant srstex wes 2res the west southwest. + 20,000 feet the dominant clecxwise sctatice lay mich further to the east, with & secondary center locates szstt ea