It sounds like a small storm coming through.

From NOAA weather for Mt Whitney:
Quote:
Monday A 50 percent chance of snow showers. Some thunder is also possible. Cloudy, with a high near 26. New snow accumulation of around an inch possible.


If it actually comes through, and does carry moisture, it can make for a tough hiking day. If it turns out to be stronger than the above prediction, it would be miserable higher up. On the other hand, if it fizzles out, you could kick yourself for not going.

Take extra rain and weather gear, go only as far as you feel safe. It will be "an experience" whether or not you make the summit.