o™~ . HEADQUARTERS JOINT TASK FORCE SEVEN. tone ien ey oT ee APO 437 San Francisco, California NAVAJO 13 July 1956 BIKINI OBSERVED WEATHER FOR 11 JULY 1956 AT DETONATION TIME 0556M Sea Level Pressure Free Air Surface Temperature 1010.2 mbs 81.297 Wet Bulb Temperature 76,29 Dew Point Temperature 7.0 Relative Humidity Surface Wind 80.0% 090° = 8 knots Visibility 10 miles i wemee ee CLOUDS : 2/10 cumlus, bases estimated at 1800 feet 6/10 cumlus, bases estimated at 2000 feet 7/10 cirrostratus, bases estimated at 30,000 feet (transparent) AREA WEATHER SUMMARY FROM AIRGRAFT: O600M - (Aircraft at 45,000 feet) Scattered to broken cloud layer based at 30,000 feet, tops at 35,000 feet. scatterod) with tops to 35,000 feet. Bikini Atoll, Few cumulus (widely Could not see surface or . O615M - (Aircraft at 44,000 feet just above broken to overcast cirrus cloud layer to the west of Bikini) Scattered cirrus clouds 50 miles south of Bikini. Few scattered cirrus to north and east of Bikini with approximately 2/10 small cumlus at low levels. Few cumulus tops to 25,000 feet. STATE OF SEA: . DNA Ocean Side: Wave height 5 ft., period 5 seconds, direction 080 degrees. Sea water temperature - 83.0. Iagoon Side: Wave height less than 1 foot.