Oh I want a lightning proof jacket!!!

whistler, the descent off the first pass is always cold because it is still early. You saw my list above - I'll be wearing all that - arm, leg, jacket, long finger gloves, ear warmers.

We have been getting very strong afternoon thunderstorms now, hopefully that will mellow out, but it's pretty common. so by noon or so (2nd and 3rd summits) you may get a t-storm. this can include anything from a little drizzle to howling 40mph winds and driving pea sized hail and torrential rain. If the forecast is for that stuff, be prepared with maybe an extra warm layer and a true waterproof jacket, head/ear covering, maybe toe covers.

If there is a "real" storm - a weather system, as opposed to afternoon thunderstorms, I will probably bail (that's just me).

The year i did it i was cold descending the first pass, then I was in short sleeves the rest of the day, except I put on arm warmers & a wind jacket coming down off loveland pass.

Here are some weather sites - note this shows hour-by-hour, so you can guess where you are at what time. Notice the thunder and wind portions, they are as important as the temperature and rain:

Start
First Summit
Second Summit
Third Summit
End