Answer: hail

AnswerCrossword Clue
HAILThunderstorm product
HAILHard water?
HAILGolf-ball-sized precipitation, maybe
HAILPotentially painful precipitation
HAILDamaging downpour
HAILCall, in a way
HAILHard downpour
HAIL".. to the Chief"
HAILWave to from the curb, maybe
HAILWord to the chief
HAIL... Mary
HAILCome down hard?
HAILHard rain?
HAILSignal, as a cab
HAILA hard rain that's a-gonna fall?
HAILCall a cab
HAILIcy precipitation
HAILCar-denting precipitation
HAILGreet Caesar
HAILHard rain
hailto greet
HAILFlag down
HAILThunderstorm fallout
HAILGreeting
HAILWeather problem
HAILDeferential greeting to Satan
HAILHeavy rain?
HAILGreet
HAILGive a greeting
HAILAve!
HAILFalling pellets
HAILGreeting for Caesar
HAILFrozen precip
HAILSalute
HAILInclement weather
HAILSalute with pomp
HAILFrozen raindrops?
HAILThunderstorm by-product, at times
HAILHeavy weather?
HAILDamaging precipitation