We just had one of these over NZ this week.
Basically since we are a small country surrounded by water we got HUGE amounts of rain all over the country.
Lots of slips, flooding and high winds etc etc.
The Pacific Sun of P&O Australia (the ex Carnival Jubilee) was 600 Km's north of Auckland and hit by this weather with 7 meter waves which caused it to roll heavily.
Apparently 53 passengers were injured with 7 of them considered "serious".
It is due back in Auckland this afternoon (late).