In several 1960's experiments Clyde L. Cowan's group observed mu-e-decay events
with a sharp, statistically-significant intensity peak near 21 hr LST (denoted
the Cowan Effect). The zenith happened to be near 39 deg N and 21 hr RA, close
to the direction (\sim 47 deg N, \sim 21 hr RA) of our galactic spiral arm and
of the Sun's motion in the galaxy. The mu-e decay detectors were
omnidirectional, but the response would be strongly peaked at the zenith if the
atmosphere highly attenuated the primary particles. If galactic dark matter (DM)
includes
a nonrotating, strongly-interacting component (SIMPs), it would arrive at Earth
as a highly directional "wind," peaking at 21 hr LST- -a huge Compton-Getting
Effect for DM v/c \sim 1000. Peaks near 21 hr LST (presently
\sim 2 to 3 \sigma) in low and high altitude Arizona experiments and in
cosmic ray data from the LSND experiment (plus more new data) will be presented.