"We are really pleased with the strength and depth of the squad with some pleasing individual performances over the last three or four weeks," said Howley.
"But we all understand and realize the skill, physicality and intensity will go up over the next five weeks.
"Argentina are first up and after the experience they have gained in the Rugby Championship they will be a challenging and tough opponent, but this is a challenge we will look forward too.
"We know how important momentum is going into any series and the bigger picture is the Rugby World Cup draw at the beginning of December and how we perform against the Pumas, Samoa, the All Blacks and the Wallabies will have a direct effect on our seeding in that draw.
"We need a successful November to back up our performances at the RWC in New Zealand and the Six Nations Grand Slam earlier this year and we are determined to achieve it."
As part of their preparations for the autumn series, the Wales squad will return to Spala in Poland for a traing camp on 29 October-5 November, although they will be without those players contracted to French and English clubs.
The flanker says Wales are eager to get back to Test action: "We have a series of tough matches to look forward to, not least the first against Argentina," said Warburton.
"The Pumas have been impressing everyone in the Rugby Championship. and are getting closer to the top three teams, just as we like to think we are and they will be looking to send a message around the rugby watching world by beating us in November.
"They are very much the same as Samoa in a lot of ways, they are a very physical team as well.
"Australia probably play quicker rugby and are a bit more expansive but the Pumas will be just as tough.
"All three of those games I think will be great spectacles and great rugby matches. The standard that Argentina are playing at now because of their involvement in the Rugby Championship now will make them even more competitive.
"I watched them against Australia and it was a game Argentina lost rather than the Wallabies won. They scored two tries and played very well, it was in Australia as well, and we know how tough it is to go out to Australia and play, so I was very impressed with that match.
"They have a couple of real world-class players they gave us a tough test when they came to the Millennium Stadium in the World Cup warm-up game last summer.
"I'm sure it will be equally as tough again because of the standard of rugby they've been exposed to the last few months."
Wales squad for autumn Tests against Argentina, Samoa, New Zealand and Australia:
L Halfpenny (Cardiff Blues), Liam Williams (Scarlets), A Cuthbert (Cardiff Blues), G North (Scarlets), H Robinson (Cardiff Blues), A Beck (Ospreys), J Davies (Scarlets), J Roberts (Cardiff Blues), S Williams (Scarlets), D Biggar (Ospreys), J Hook (Perpignan), R Priestland (Scarlets), T Knoyle (Scarlets), M Phillips (Bayonne), Lloyd Williams (Cardiff Blues).
S Andrews (Cardiff Blues), R Bevington (Ospreys), P James (Bath), A Jarvis (Ospreys), G Jenkins (Toulon), A Jones (Ospreys), R Hibbard (Ospreys), K Owens (Scarlets), M Rees (Scarlets), B Davies (Cardiff Blues), L Charteris (Perpignan), I Evans (Ospreys), A-W Jones (Ospreys), T Faletau (Newport Gwent Dragons), R Jones (Ospreys), R McCusker (Scarlets), A Shingler (Scarlets), J Tipuric (Ospreys), J Turnbull (Scarlets), S Warburton (Cardiff Blues, capt).
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