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Wind
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Calm (≤ 2 Kts)
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Light breeze (2 – 10 Kts)
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Breezy (11 – 15 Kts)
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Windy (16 – 26 Kts)
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Strong Winds (27 – 33 Kts)
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Gusty (Sharp increase > 10Kts above average)
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Near Gale Strength or Gale Strength Winds (34 – 47 Kts)
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Storm Strength Winds (48 – 63 Kts)
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Hurricane Strength Winds (> 63Kts)
Degree of Daily Sunshine
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Long, Sunny Spells (=Clear, Cool Night)
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Sunny Intervals
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Little Sunny Breaks or Gloomy
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Dull & Hazy (=Dull, Hazy Night) [Diffused Sunlight through lithometeor]
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Note: Except where a sunny day (even those Dull and Hazy) continues into a night of no showers (A Clear, Cool Night or Dull, Hazy Night), Rainfall/Wind descriptors should be used as forecasting terms for nighttime.
Rainfall (Rain or Showers)
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Time of Occurrence/Cessation
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Type (in Character/intensity, Space & Duration)
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Accompanying Thunder, Lightning & Gusty Winds and or resultant flash flooding/landslide/landslip
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Probability
Transitioning of Weather
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Gradual
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Deteriorating
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Interrupted
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Prevailing or Dominant
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Rapid
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Alternating
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Improving
Seas
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Calm (0 -0.5 Meters)
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Slight (0.5 – 1.25 Meters)
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Moderate (1.25 – 2.5 Meters)
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Rough (≥ 2.5 Meters) (Big Waves)
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Choppy (rough but with small waves i.e. < 2.5 Meters)
Probability
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Slight Chance = 20% Chance
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Chance = 30 - 50% Chance
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Likely = 60 - 70% Chance
Type (Character, Space & Time)
Character
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Light
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Moderate
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Heavy
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Violent
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Thundery or Thundershowers
Space
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Few Confined Areas
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Varying Localities
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Broad Areas
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Hilly Areas
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Countrywide
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North, South, East, West, Central or any combination of these
Time
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Brief
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Intermittent
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Frequent
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Lengthy Periods
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Continuous
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