HOW CAN I TELL IF MY TREE IS PRONE TO BREAKAGE?

THE ANSWER IS VISUALLY SIMPLE

You see it all the time.  The trees that break are typically imbalanced or diseased.  Observe these photos for example:

THIS TREE WILL SPLIT RIGHT DOWN THE MIDDLE DURING A BAD STORM SUMMER OR WINTER

THIS TREE WILL COMPLETELY UPROOT IN A BAD STORM SUMMER  OR WINTER

THIS TREE'S DEAD FROM DISEASE LIMBS WILL BREAK  OFF  IN  EVEN A MILD STORM

THIS TREES LEFT LIMB IS WEAK IN CALIBER AND IT COULD VERY WELL BREAK IN AN ICE STORM

THIS TREE WILL LOSE THE LOWER RIGHT BRANCHES FROM WEIGHT IN A SNOW OR ICE STORM

THIS TREE WILL LOSE THE VERY BRANCH THE ARBORIST IS BEGINING TO PRUNE IN A WINTER STORM OF SNOW, ICE AND HIGH WINDS