LACROSSE EVENT
OPERATION REDWING
Ll, °
The etomic device.! LACROSSE, J wes cetoneted at 06750, 3 5 Mey
1956 at the surface on the island of RUKIT in the ENIWETON Atoll.
LC,C00
feet.
. The LACRCSSE cloud reached an altitude of appromunately
Ppro
:
The cloud sheared et approximately 16,000 feet with| the stem and
lower
portion of the cloud moving
the unver
sorticr
moving
6 west, 5
Se
~
the Northeast.
to
The initial helicopter survey indicated thet the
falleutwas developing as forecast.
Based on the initial nelicepter
survey anc aerial monitoring reports, reentry hour wes esteblished as
O7LSE; 5 Mey 1956.
411 RADEX notices were withdrawn at 131CM, 5 Nay
1956 and the EXIWETOX area was open tc aircraft.
eo
The fallout predicvion for LACROSSE «ras based or. 2 surface
burst with a maximum yield on the order of 60 Kilotons.
The
fallout plot (see TAB B). shows the fallout
with long axes lying along a
Cc
n
rue bearing of 50°.
The rether limited
2
information on fallout for LACROSSE prevents 2 cquantiteative tomparison
fo
“ul
of the agtuel end forec