Condition
Definition
High-Wind (Advisory) Condition II
Non-thunderstorm winds sustained between 18 and
33 knots, or numerous gusts equal to or greater than
24 knots are expected within 24 hours.
High-Wind (Advisory) Condition I
Non-thunderstorm winds sustained between 18 and
33 knots, or numerous gusts equal to or greater than
24 knots are expected within 12 hours.
Gale (Warning) Condition II
Non-thunderstorm winds sustained between 34 to 47
knots are expected within 24 hours.
Gale (Warning) Condition I
Non-thunderstorm winds sustained between 34 to 47
knots are expected within 12 hours.
Storm (Force Winds) Condition II
Non-thunderstorm sustained winds of 48 knots or
greater are expected within 24 hours.
Storm (Force Winds) Condition I
Non-thunderstorm sustained winds of 48 knots or
greater are expected within 12 hours.
Table 1-27 -- Wind conditions
Tropical Cyclone Conditions
Tropical Cyclones are systems of cyclonic rotating winds characterized by a rapid
decrease in pressure and increase in winds toward the center of the storm, which form
during warmer seasons over warm tropical waters. A tropical cyclone can be a tropical
storm, tropical depression, typhoon, hurricane etc. Table 1-28 lists applicable conditions
and their definitions.
Condition
Definition
Condition V
Destructive winds are possible within 96 hours.
Condition IV
Destructive winds are possible within 72 hours.
Condition III
Destructive winds are possible within 48 hours.
Condition II
Destructive winds are anticipated within 24 hours.
Condition I
Destructive winds are anticipated within 12 hours or are
occurring.
Table 1-28 -- Tropical cyclone conditions
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