• State of the sky when it is cloudless, totally clear or with a few small light clouds visible.
• Has a total cloud cover of less than one okta.

• State of the sky is within 2-5 oktas total cloud cover or has between 30% to 70% cover of the celestial dome.

• Mostly partly cloudy but there are times when more than 70% of the celestial dome is covered with clouds.

• The sky is mostly covered with clouds but with possible brief periods of sunshine.
• The total cloud cover is between 6 to 8 oktas.

• The sky is covered with clouds between 6 to 8 oktas or has more than 70% cloud cover.
• Predominantly more clouds than clear sky.
• For a longer period during the day, the sun is obscured by clouds.

• The sky is totally or completely covered with thick and opaque clouds, 8 oktas or around 100% cloud cover.

• Wind felt on face.
• Ordinary wind vanes moved by wind.
• Leaves rustle.

• Wind raises dust and loose paper.
• Small branches are moved.

• Moderate winds mostly persist but there are instances during the forecast period that it reaches strong wind force.

• Small trees in leaf begin to sway.
• Crested wavelets appear on inland waters.

• Large branches in motion.
• Whistling heard in telephone wires.
• Umbrellas used with difficulty.

Gale:

1 Near Gale*

2 Gale

3 Strong Gale*

51-62

63-75

76-87

28-33

34-40

41-47

• Whole trees in motion.
• Inconvenience felt when walking against wind.
• Twigs break off road.
• Cars veer on road.
• Larger branches break off.
• Slight structural damade occurs-roofing dislodged.

Stormy:

1 Storm

2 Violent Storm*

3 Typhoon*

88-102

103-117

118 or more

48-55

53-63

64 or more

• Trees uprooted.
• Considerable structural damage.
• Widespread damage.

• Scattered drops that do not completely wet an exposed surface regardless of duration.

• The rate of fall is from trace to 2.5 mm per hour.
• Individual drops easily identified and puddles(small muddy pools) form slowly.
• Small streams may flow in gutters.

• The rate of fall is between 2.5 mm to 7.5 mm per hour.
• Puddles rapidly forming and down pipes flowing freely.

• The rate of fall is greater than 7.5 mm per hour.
• The sky is overcast, there is a continuous precipitation.
• Falls in sheets, misty spray over hard surfaces.
• May cause roaring noise on roofs.

• Heavy and continuous precipitation attributed to either the Southwest or Northeast Monsoon.

• Not frequent but is recurrent precipitation.

• Precipitation occuring extensively throughout an area.

• Precipitation occuring regularly and often throughout the time duration.

• Precipitation which ceases at times and re-occur again.

• The rain-bearing clouds is distributed spatially resulting to rainshowers occuring to the bigger part of the forecasted area.

• The rain-bearing clouds is small and isolated resulting to rainshowers occuring only to a small part of the forecasted area.

• There is a large amount of convective clouds and precipitation occur in most parts of the forecasted area occasionally, and varying in rainfall amount.

• Showers accompanied by brief but sudden strong or gale force winds.

• Ripples with the appearance of scales are formed but without foam crests.

• Small wavelets, still short but more pronounced.
• Crest have glassy appearance and do not break.

• Small waves, becoming longer.
• Fairly frequent white horses.

• Moderate waves taking a more pronounced long form.
• Many white horses are formed-a change of some spray.

• Large waves begin to form.
• Sea heaps up and white foam from breaking waves begin to be blown in streaks along the direction of wind.

• Moderately high waves of greater length.
• Edges of crest begin to break into spindrift.
• Foam is blown in well-mark streaks along the direction of the wind.

• High to very high waves with long overhanging crests.
• The surface of the sea takes on white appearance.
• The thumbling of the sea becomes heavy with visibility affected.

• Exeptionally high waves.
• Small and medium size ships occasionally lost from view behind waves.
• The sea is completely covered with long white patches of foam.
• The edges of wave crest are blown into froth.

• The air is completely filled with foam and spray.
• Sea completely white with driving spray.
• Visibility very seriously affected.