Needles falling off blue spruce
I live in St. Louis, MO. I have a 3-year-old spruce that has thrived since I planted it but just noticed that it looks sick. All of the needles are falling off, coming from the inside of the branch and traveling out.
The needle drop could be environmental, wind and winter damage or even excess moisture.
Blue Spruce do suffer from fungus diseases.
Here are some links that may help you identify the cause.