Saturday, 15 January 2011
We are in Cyclone season in Queensland and back to that age old cruiser summer hobby of weather watch. Our first cyclone, Vania, a category one with 35 knot winds, what? So I did some research. The above table shows the rating systems for different tropical storms. Here is a surprise, different countries use different ratings for storms.
In Australia Cyclone ratings are as follows.
Category 1 Cyclones - 34 to 47 knts
Catergory 2 Cyclones - 48 to 63 knts
Category 3 Cyclones - 64 to 85 knts
Catergory 4 Cyclones - 86 knts to 106 knts
Category 5 Cyclones - greater than 107 knts
This contrasts with the US rating system
Category 1 Hurricanes - 56 to 72 knts
Category 2 Hurricanes - 73 to 85 knts
Category 3 Hurricanes - 86 to 99 knts
Category 4 Hurricanes - 100 to 119 knts
Category 5 Hurricanes - greater than 120 knts
So, in summary at the low end of the scale cyclone warnings may scare us prematurely however on the high end all severe storms are best to be avoided if possible.