The direction and speed of the wind can affect management of a hazardous spill site. The speed can be estimated by changes in the environment.
Wind Speed
Wind Velocity
Observation
low
< 6 mph
wind felt on face;
leaves rustle;
vane moved
moderate
6 to 12 mph
raises dust or loose paper;
small branches move
high
> 12 mph
large branches in motion; umbrellas use difficult;
telephone wires whistle
The Beaufort scale for wind speed can provide a more specific description of wind speed effects.
A pocket wind meter provides a more accurate measure of wind speed.
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Specialty: Toxicology, Emergency Medicine, Critical Care
