= BIKINI OBSERVED WEATHER FOR 21 MAY 1956 (CHEROKEE). DETONATION TIME 0551M ds 3 he Sea Level Pressure 1099.0 mb Temperature 81°F Dew Point 73°F Relative Humidity 764 Visibility More than 10 miles Surface Wind CLOUDS: 140°, 10 kts 2/10 cumulus, bases 1800 ft, tops 2500 ft; 2/10 cirrus at 38,000 ft. WEATHER: Very widely scattered showers, in the vicinity of the atoll at shot time: There were three showers one very light shower just to the south of Eninman (Tare); one light shower, which was eee near Bokororyuru (Bravo); and a light shower east of Enyu (Nan). STATS OF SFA: Bikini Lagoon: Average of highest 1/3 of waves; 3.0 ft. at anchorage, 2.5 ft. near Namu. The predominant direction of waves at anchorage was 135°; near Namu, 100°. highest 1/3 of waves; 4.0 ft. . Open Sea: Average of The predominant Cirection of waves in ° open sea was 100 . BIKINI SOUNDING Pressure Millibars 1009 1000 916 850 835 823 772 716 710 700 500 Height Tempgrature Feet c Sfe 320 27.2 26.5 18.5 15.5 15.2 13.5 10.5 06.2 07.2 07.2 -07.8 4,930 10,230 19,080 Dew Point °c 22 2 22.5 17.5 10.8 09.5 13.5 10,2 02.2 03.5 03.5 -10,2 COPIED(DOE 7 LANL RC - -7- \