et te tenmc " JOINT TASK FORCE SEVEN APO 437 San Francisco, California 10 July 1956 APACHE _t 7 ENIWETOK OBSERVED WEATHER FOR 9 JULY 1956 AT DETONATION TIME O606M . 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 7L.9°F & £ 030° - 15 knots Over 10 miles CLOTS: 2/10 cumilus; bases estimated 1500 ft., tops estimated 25 ,000 feet to sout” and nest, 2/10 c\ratoczmilus; bases at 2,000 ‘ft., tops estimated 4,000 feet. alto. umlusLess chan 1/10. Few “10 c:rostvatus; estimated at 30,000 ft. (very thin and transparent), Mure: cs co7vrai] « at 30,000 to 35,000 feet, feGL CUATHESUPLI.RY FROM AIRCRAFT: “O10: Scatvered cumilus buildups approximately 50 miles to east teres at 20,000 to 25,000 ft, fy 00=1.0,090 ft. Scattere? stratocumlus tops estimated Very light rain shower at Eriwetok, O81. LO miles north and west of ground zero, Lasse it 27,COO ft., tops unknown, M25: To east and southeast of ground zero, GZ clear, Stratus overcast 6/8 cumlus and strato- cm Lir sith tops below 15,000 ft., occasional curmlus buildup to 25,000= FO FOO Ps. 2 yom oe ETal® OF SEA: cean Side: Wave height 4 feet, period 7 seconds, direction 070 degrees. razoon Side: Wave height 1 foot.