SSM (May 03)  has expected a  geomagnetic storm  since 12 UT May 5 - 12 UT May 6. SEC hesitated (see May 4 forecast),  Meudon (May 3) have not expected.
There was no g/m storm ( Ap~16) but only moderate interplanetary sf-ch-dsf disturbances with  good looking interplanetary shock wave at about 15 UT on May 5.
So SSM has lost with the score  0  :  0.5 : 1.0 .