With dismay I've watched the forecast for clear weather on Friday night/Saturday morning (8/1 - 8/2) deteriorate into a 20-40% chance of rain during our climbing window, based on this site:
http://www.findlocalweather.com/pinpoint/us/ca/mount+whitney+trail/current571969.html

This will be my group's first time on Whitney. We're planning to do a day hike beginning around 3am on Saturday morning. In Colorado, where I've done most of my hiking of this sort, a 40% chance of storms in the high country is pretty much a guarantee of getting stormed on and generally tends to dissuade climbers from even making the trip. Does the forecast here tend to be similarly misleading, or does a 40% chance here actually mean that the chance for rain is less likely than no rain?

Also, this site is currently forecasting rain but no accumulation: http://www.mountain-forecast.com/peaks/Mount-Whitney/forecasts/2500

Is that their way of saying that the chance of rain is actually quite low?

If anyone's been up there this week and can comment on whether the forecast has proved as rainy as predicted and what that's meant for trail conditions, it'd be much appreciated. Thanks!