It's the joys of New England. We had some sub-zero temps yesterday, and when coupled with an inch or so of snow, the buildup of ice/snow on the antenna caused me to lose the ability to use 15 meters. The tuner just could not match anywhere on that band, the SWR meter was pegged. Fortunately, the other bands seemed to be unaffected and I was still able to snag a couple more new countries for my logbook (France, Bosnia, and Estonia).
The ice melted in the overnight rain, and I was back up to being fully operational today.