HEADQUARTERS
JOINT TASK FORCE SEVEN
APO 437
San Francisco, California
21 May 1956
BIKINI OBSERVED WEATHER FOR 21 MAY 1956
CHEROKEE. DETONATION TILE O551iu
Sea Level Pressure
1007.6 mb
Dew Point
73°F
Temperature
81Fr
Relative Humidity
16%
Surface Wind
U,0°, 10 kts
Visibility
CLOUDS:
More than 10 miles
2/10 cumlus, bases 1800 ft, tops 2500 ft; 2/10 cirrus at 36,000 ft.
WEATHER: Very widely scattered showers. There were three showers in the —
vicinity of the atoll at shot time: one very light shower just to the sath of
TARE; one light shower, which was dissipating, near BRAVO; and a light shower
east of NAN,
STATS OF SEA:
Bikini Lagoon:
Average of hishest 1/3 of waves; 3.0 ft.
at anchorage, 2.5 ft. near Nama. The predominant direction of waves at
anchorage was 135°; near Namu, 100°, Open Sea: Average of highest 1/3 of
waves; 4.0 ft. The predominant direction of waves in open sea was 100°,
Pressure
iillibars
1009
1000
916
850
835
823
772
716
710
700
500
453
Height
Feet
Sfe
320
4,930
10,230
19,080
Temperature
°¢
Dew Point
°¢
2702
26.5
18.5
15.5
15.2
13.5
10.5
06,2
07.2
07.2
-07.&
22,2
22.5
17.5
10.8
09.5
13.5
10,2
02,2
03.5
03.5
-10,2
-10. 2
-1lh, . 5