Spare Tyre said:
Northerly winds would be tail/cross on the stretch from Melbourne to Geelong. I'm not sure how they would affect the circuit.
Strong northerly winds should have the following effects:
1. Most of the first 80km is very exposed. Going to be more cross than tail for the first 50km, so everyone will have to work and there's potential for splits. We could lose a lot of the minnows in the first hour and no one will be completely fresh when they hit the circuits.
2. A long breakaway has to have no chance.
3. It's going to be difficult, likely impossible, for a solo or small group to follow through after attacking on either climb if there is any organisation in the chase. 50m after the first summit, and less than 1km after the second, the road turns directly into the wind for the following 2km. The top of the first climb will be the windiest place on the circuit. The Gilbert/Evans tactic of trying to fly away on the climbs in the last lap and hold on for the remaning 5km becomes harder, especially for lighter riders. The "easy" place to go solo is now at 2km to go, where the road hits the waterfront and the wind kicks in from behind. For that last 2km there will be no advantage from drafting. Given how tired everyone will be by the finish I could see Gilbert and any or all other long-range finishers going from 2km out and having a great chance of pulling it off.
4. For the same reasons as 3, anyone who gets dropped on either climb and is isolated may never be seen again. Catching the bunch after the climbs will be harder for the men than it was for the women (who had a light southerly wind). This helps those teams playing an attrition strategy and works against sprinters who are likely to need an expendable supply of teammates to help them rejoin (Cavendish springs to mind).
5. Of the final 4km, the first 2km will be straight into the wind (after climb #2), while most of the last 2km will have a tailwind, so there's going to be a big difference between holding a gap with 4km to go and holding one with 2km to go. A 40km/h tailwind for what's already an uphill sprint tilts it even further towards the smaller riders. If Cavendish is there at the end - I rate that about a zero chance - it's his to lose, and no one else is going to want to be there with Freire.
6. Northerlies also mean much warmer temps than Melbourne has seen for the past two weeks (10C higher), and very low humidity (could be as low as 10%), so dehydration might catch a few out too. They can also cause hay fever (Gesundheit, Señor Freire).
7. Domestiques may get shelled earlier than planned. I'm expecting it to shatter into every man for himself for the last 5km like the women's race did. The women's race hinged on the presence of one or two teammates available to chase over the closing few km, but those teammates were helped by a tailwind to rejoin the leaders, whereas for the men the wind will make it much harder for teammates to rejoin and have any influence.
I don't know how the characteristics of the Italian riders suit these conditions and since they have no cards to play in a sprint finish I'm looking forward to seeing what they do. They seem to be really good at selecting both riders and tactics for complicated races so I wouldn't bet against them achieving at least a podium. I also reckon that if everyone is looking at each other when they turn into the wind at 4km to go, and Cancellara gets away, they'll all be racing for second place. LL Sanchez is also a bigger rider and if he has prepared for this course he'd have to fancy his chances too.