ALADQU Arpt JOINT TASK FORCE SEVEN APO 437 San Francisco, California 10 July 1956 APACHE ENIWETOK OBSERVED WEATHER FOR 9 JULY 1956 AT DETONATION TIME 0606M Sea Level Pressure Free Air Surface Temperature “ Wet Bulb Temperature Dew Point Temperature Relative Humidity Surface Wind Visibility 1010.5 mbs 80.3°F 76.4°F 7409OF ae 030° — 15 knots Over 10 miles CLOTS: ° 2/10 cumulus; bases estimated 1500 ft., tops estimated 25000 feet to south and west, 2/10 stratocumlus; bases at 2,000 (ft., tops estimated 4,000 feet. Few altcc umlus Less shan 1/10. 4:10 cz rostratus; estimated at 30,000 ft. (very thin and transparent). Murer cs comrail. at 30,000 to 35,000 feet, AR: COATHE? SUMERY FROM AIRCRAFT: “OLOM: Scattered cumlus buildups approximately 50 miles to east terced at 20,000 to 25,000 ft. Scattered stratocumlus tops estimated al €,000-10,000 ft. Very light rain shower at Eniwetok, GZ clear. Q6L5i: 10 miles north and west of ground zero. Lased ct 27,000 ft., tops unknowm. 2%: To east and southeast of ground zero, Stratus overcast 6/8 cumlus and strato- cum-aas with tops below 15,000 ft., occasional cumlus buildup to 25,000— 20, COO ~ z e “74.8 Of SEA: cean Side: Wave height 4 feet, period 7 seconds, direction 070 degrees. yagoon Side: Wave height 1 foot. '