Q.weeping cherry tree is not blooming
My weeping cherry tree is not blooming or getting new growth. We had an extremely cold winter. Could this be why and will it come back?

The weather has definitely wreaked havoc with plant life and trees this year and the weeping cherry trees are no exception. The onset of blooming in weeping cherries is variable from year to year and is completely dictated by the weather and we did just endure a cold winter followed by a cold spring. I would give your tree some more time to snap back to life - it may just be looking for a sustained warming trend before it decides to bestow you with its flowery splendor.
For more information on the care of weeping cherry trees, please visit the following link:
https://www.gardeningknowhow.com/ornamental/trees/weeping-cherry/weeping-cherry-growing-tips.htm