From birdsite 

RT @nontanne
my favorite poem is the beaufort wind scale i guess


From birdsite 

@david caption:
Screenshot of one column out of a table. The cells of the table are:
Smoke rises vertically
Smoke drifts with air, weather vanes inactive
Leaves & small twigs move, light flags extend
Small branches sway, dust & loose paper blows about
Small trees sway, waves break on inland waters
Large branches sway, umbrellas difficult to use
Whole trees sway, difficult to walk against wind
Twigs broken off trees, walking against wind very difficult

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From birdsite 

Slight damage to buildings, shingles blown off roof
Trees uprooted, considerable damage to buildings
Widespread damage, very rare occurrence
Violent destruction

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