HEADQUARTERS JOINT TASK FORCE SEVEN APO 437 San Francisco, California 6 June 1956 SEMINOLE ENIWETOK OBSERVED WEATHER FOR 6 JUNE 1956 AT DETONATION TIME 1255M Sea Level Pressure 1010.5 mbs Free Air Surface Temperature Wet Bulb Temperature Dew Point Temperature 86,9 ° 99.29 76,59 Relative Humidity Surface Wind Visibility CLOUDS 71.0% . 0950 at 11 knots Over 10 Miles . 2/10 cumilus; bases estimated at 1500 ft, tops estimated below 4000 ft. 1/10 stratocumlus; bases estimated at 3500 ft, tops below 4000 ft. No middle clouds. 7/10- cirrostratus; estimated at 30,000-ft; very thin (al transparent). AREA WEATHER SUMMARY FROM AIRCRAFT REPORTS Small scattered cumulus in area 100 miles to the east and as far north and south as the eye could see from 8,000 ft. Tops seemed to increase near Eniwetok to 3500-4000 ft. and total 3/8 sky coverage outside lagoon. No towering cumulus observed. Appeared to be a line of scattered cumulus about 15 miles north of the atoll with tops rising to 6-8,000 ft. No showers observed. t STATE OF SHA Ocean Side: Wave heights 4 feet, period 6 seconds, direction 090°,’ Lagoon Side: Wave heights about 1 foot, ENIVWETOK UPPER AIR SOUNDING (060000Z) ‘Pressure (Lillibars) 1000 850 700 600 500 1,00 347 Height (Feet) . 34,0 4,980 - . 10,360 44,510 19;, 260 21,870 28, 281 Temperature (°c) . 27.5 18,2 09,2 02.2 -07.5 ~17.5 24.5 * Dew Point (°C) 22.2 10.8 02,2 -,.5 ~20,2 -31.2 37.8