Richard CMP (thank you, Richard) reported a visual observation of U Gem at 13.7 on 2015 Feb. 10.14202 UT. However, he subsequently reported another visual observation at 14.5 on 2015 Feb. 10.26515. Thus, U Gem may not be going into outburst after all - Richard may be seeing eclipsing behavior.
Please check U Gem and report your observations as soon as possible tonight so we may know for sure the status of U Gem.
Many thanks, and good observing,
Elizabeth Waagen, AAVSO HQ