HEADQUARTERS
JOINT TASK FORCE SEVEN
APO 437
San Francisco, California
21 May 1956
BIKINI OBSERVED WEATHER FOR 21 MAY 1956
CHEROKEE. DETONATION TIME 0551u
Sea Level Pressure
Temperature
1009.8 mb
819
Dew Point
‘73°F
Relative Humidity
76%
Surface Wind
140°, 10 kts
Visibility
CLOUDS:
More than 10 miles
2/10 cumulus, bases 1600 ft, tops 2500 ft; 2/10 cirrus at 38,000 ft.
WHATHPR:
Very widely scattered showers,
There were three showers in the
vicinity of the atoll at shot time: one very light shower just to the scuth of
TARE; one light shower, which was dissipating, near BRAVO; and a light shower
east of NAN.
7
STATE OF SEA:
:
Bikini Lagoon:
at anchorage, 2,5 ft. near Nam.
Average of highest 1/3 of waves; 3.0 ft.
The predominant direction of waves at
anchorage was 1359; near Mam, 100°,
waves; 4,0 ft.
Open Sea:
Average of highest 1/3 of
The predominant direction of waves in open sea was 100°,
SOUNDING
Pressure
Height
iillibars
Feet
1009
1000
916 .
850
835
823
772
716
710
-
700
500
153
Sfe
320
Temperature
Dew Point
27.2
26.5
22,2
22.5
°¢
‘
4,930
,
18.5
15.5
15.2
- 13.5
17.5
10.8
09.5
13.5
06.2
02,2
10.5
10,230
19 ,O80
10.2
07.2
03.5
-07.8
-10.2
07.2
—
°¢
=10.2
03.5
-14.5