Hail (우박, ubak) is read very differently from rain despite both being forms of precipitation — where rain is generally a blessing, hail is sudden and damaging by nature, and the dream inherits that harsher character directly.
Hail damaging crops, property, or a vehicle in the dream is read as a sudden, sharp setback — usually financial or practical rather than emotional, echoing hail's real-world reputation for destroying harvests without warning. Being caught outside in hail and getting hurt is read more personally, as an unexpected difficulty that catches you off guard.
One detail interpreters consistently point to is how short real hailstorms tend to be compared to sustained rain — and that brevity carries into the reading. A hail dream is generally treated as a brief, sharp period of trouble rather than a prolonged one, which softens the warning considerably compared to a flood or landslide dream.
Watching hail from shelter without being personally affected is read more mildly, closer to witnessing difficulty nearby (someone else's setback, a piece of unsettling news) rather than experiencing it directly yourself.