HEADQUARTERS JOINT TASK FORCE SEVEN APO 437 San Francisco, Califernia _ 22June 1956 . INCA ENIWETOK OBSERVED WEATHER FOR 22 JUNE 1956 AT DETONATION TIME 0956M \ - Sea Level Pressure | Free Air Surface Temperature + Wet Bulb Temperature Dew Point Temperature Relative Humidity Surface Wind Visibility CLOUDS: 1009.8 mbs 83,3°F 78.3 76.6% 81.08 130° — 11 knots " Over 10 miles | 2/10 cumlus; bases estimted at 1800 ft., tops 5-8,000 ft. (moving from southeast). 10/10 cirrostratus; bases estimated at 23,000 ft., tops over 30,000 ft. (all opaque). WEATHER : No showers observed, AREA WEATHER SUMMARY FROM.AIRCRAFT: Narrow band of scattered cumlus clouds averaging 3/10 to 4/10 coverage . to the southeast of GZ. (Distance not reported) Tops of cumlus at &,000 ft. Cirrostratus overcast based at 25,000 ft. (measured) with tops at 31, 000 ft. Cirrus opaque and dense. Target area was clear of cumulus clouds at 0931M, STATE OF SEA: Ocean Side: Wave heights 6 ft., period 7 seconds, direction 090°. Lagoon Side: Wave heights 1.5 ft. ENIWETOK UPPER AIR SCUNDING (Release time O910M) Pressure Height (Hillibars) 1000 850. 804 (Feet) 280 . 4,920 6,562 778 . 700 600 , 580 7 hb - 10,320 14;480 15,420 Temperature (°C) 25.5 17.2 . 14.5 15.2 10.5 01.8 00.5 ~ Dew Point (°C) 22.5. 10,2 06.5 06.5 03.2 ~07.5 -08.2