Southern and Central California just received significant rain and snow. Northern CA got some and is about to get more. We're still talking drought and unusually warm temperatures, but the mountains will be snowy in March. The Panamint City weather Station, at 6,880 feet and a few miles southwest of Telescope Peak, recorded 1.66 inches of precipitation over the past handful of days.
When I left Death Valley NP a week ago, snow was visible on Telescope Peak from the valley. Given the mostly dry and warm winter, the snow was probably not deep. I have not heard reports confirming if ice was a major issue or difficult to bypass. When I went in February a couple of years ago, I was easily able to stay on soft, shallow snow by heading straight up the final ridge rather than attempting to stay on the switchbacks. I did encounter small ice patches in the portion of the hike near the trailhead.
However, I'm guessing the entire hiking route and much of the road beyond the charcoal kilns just received 1-2 feet of snow with some areas of higher drifts. I'm guessing a March 11 hike would involve starting from the charcoal kilns and snowshoeing or post-holing for many miles. I'd recommend being willing to turn back without summiting and/or bringing snowshoes, trekking poles, ice axe, and crampons unless you can confirm that plain waterproof hiking shoes/boots (and maybe gaiters and possibly microspikes) will suffice. The snow might be shallow enough and soft enough to just be fun and scenic, but it also could be deep enough, or icy enough in some steep areas, to make for a bigger adventure than you may want. Barring another significant storm, waiting until late March or into April would likely reduce the event to a simple hike from Mahogany Flat (normal TH). Here's a point forecast:
http://forecast.weather.gov/MapClick.php?lat=36.169949&lon=-117.08922239999998&site=all&smap=1&searchresult=Telescope%20Peak%2C%20Death%20Valley%20National%20Park%2C%20California%2C%20USA