Good question, i am interested to what people have to say.
Mid winter i figured we were going to have an excellent fall this year (both in the form of great antler growth and high survival rates) because of the warmer then usual temperatures and seemingly no deep snow anywhere in the west. Deer and Elk would go into the spring and summer with better then normal fat reserves and less stress from not having to survive one of those winters that comes around once every 10-15 years. Which would kick start a good antler growth year.
But its starting to seem like the lack of rain may be offsetting the "easy" winter in some places.
We had an el-nino last year, and while some say the el-nino wasn't strong or almost non-existant, here in California we had one of the best offshore fishing seasons for pelagic species in HISTORY (because of the el nino). I believe this el-nino is the main reason we have had such an easy winter (i think next two winters will be similar to the last two; warmer then normal and drier then normal).
I think the el nino means good things for southern states and less favorable things for more northern states. The southern states like Arizona and New Mexico should have strong Monsoons in the summer, but any states north of AZ and NM wont see as much precipitation as normal.
My SWAG's are for areas i have tried to follow the weather for this winter, but have not personally been to most of these areas so take it with a grain of salt.
Arizona (North portion and East portion), and New Mexico (West portion) will have Excellent antler growth years if the monsoons do not show too late.
90% of Nevada will have a bad year for antler growth and fawn/calf survival.
Colorado (West half) will have a good/okay year as far as antlers and the mule deer pop will rebound favorably since the winter was easier then normal and has had some snow/rain showers at times.
Eastern Montana seems dry, and may have a dry summer so antler growth will be a little less than normal. psinclair will still shoot a 200+ muley.
California is ****ed. Antler growth is an oxymoron for this state anyway. Hoping the big cats get really thirsty this summer.