ae HEADQUARTERS JOINT TASK FORCE SEVEN APO 437 San Francisco, California 12 June 1956 FLATHEAD BIKINI OBSERVED WEATHER FOR 12 JUNE 1956 AT DETONATION TIME 0626M Sea Level Pressure , Free Air Surface Temperature , 1012.9 mb Dew Point Temperature 82.0°F 76,0°F Relative Humidity Surface Wind 82.0% 050° at 10 knots Visibility 10 miles CLUBS : 4/10 stratocumlus and cumlus; bases estimated at 2000 ft. 10/10 cirrostratus; bases estimated at 30,000 feet. WEATHER : DNA No shower activity reported. BIKINI UPPER AIR SOUNDING (1119002) Pressure (Millibars) Temperature (°C) Dew Point (°c) 110 380 27.8 26.8 24,45 23.5 850 770. 735 700 666 640 5,020 7,759 9,022 10,380 1,713 12,705 17.2 4.2 10.8 08.5 06.8 05.2 560 543 525 500 400 16,327 17,126 17,995 19,250 24,840 ~02.8 04.8 04.2 08.2 ~19,.2 300 31,670 32.3 1011 1000 947 611 : Height (Feet) 1,903 14,042 22.2 02.8 19.5 , 11.8 01.5 702.2 -02.4 02.5 -08.8 ~06.2 -10,.2 -20.5 -19.2 -..8 3005 Mi