JOINT TASK FORCE SEVEN
San
4
’
,
12 June 1956
"BLACKFOOT
ENIVETOK OSSERVED WEATHER FOR D JUNE 1956 |
AT DETONATION TIME 0626M
Sea Level Pressure
Free Air Surface Temperature
.
Wet Bulb Temperature’
Dew Point Temperature
Relative Humidity
Surface Wind
Visibility
.
.
-
.
1012.5 mb
81.19
97 ,2°F
7589
8h..0%
075° 10-14 knot's
‘
10 miles
CLOUDS:
2/10 cumulus; estimated at 1500 ft.
'
Large cumulus with shower activity
located 74 miles bearing 060° from Eniwetok.
measured by radar at 37,000 ft.
1/10 stratocumlus; base estimated at 4500 ft.
2/10 or more. altocumlus; estimated at 9000 ft.
Top of this cumulus
’
(opaqu
8/10 cirrostratus; estimated at 30,000 ft. (thin) tiie. transparent)
REA WEATHER SUMUARY FROM AIRCRAFT REPORTS:
_
3/8-5/8 cumlus over Eniwetok area with bases at 1500 feet and tops
generally at 5000-7000 feet.
Cumulonimbus located south of GZ with top
at 35,000 feet. Some cumlonimbus tops estimated at 45,000 feet to north—
east and north of GZ (no distance estimated), A scattered: line of cumlo—
nimbus about 30 miles east of GZ with tops estimated at 40, 000 feet.
“8/10 altostratus; bases at 13,, 500 ft with tops at 15, 000 feet.
- 8/10-9/10 cirrostratus (very thin); based at 30,000 feet which appeared
to be “breaking up" and dissipating.
Rain showers were observed to the east and west of GZ, no distances
estimated,
STATE OF SEA:
ote
Ocean Side: Wave heights 5 feet, period 6 seconds, direction 090°.
Lagoon Side: Wave heights less than 1 foot,
ENTTOK UFPER AIR SOUNDING (1117152)
Pressure
(W4illibars)
1004
1000
850
718
Height
(Feet)
-
364
5,016
8, 530
Temperature
(°C)
Dew Point
(°c)
%B.h
23.7
17.7
13.3
26,3
11.0
23.6
O5.4°