Cool

Comfortable to slightly chilly temperature; light clothing may be needed. Suitable for most outdoor activities.

Moderate

Pleasant warm temperature; light clothing recommended. Comfortable for outdoor activities.

Warm

Warm temperature; prolonged exposure may cause discomfort. Stay hydrated and avoid strenuous activity during peak hours.

Hot

High temperature; risk of heat stress increases with prolonged outdoor activity. Drink plenty of water and seek shade if possible.

Extreme Heat

Very high temperature; dangerous for outdoor activity. Risk of heat stroke; avoid outdoor exposure and stay in cool or air-conditioned areas.

Caution

Fatigue is possible with prolonged exposure and activity. Continuing activity could lead to heat cramps.

Extreme Caution

Heat cramps and heat exhaustion are possible. continuing activity could lead to heat stroke.

Danger

Heat cramps and heat exhaustion are likely; heat stroke is probable with continued exposure.

Extreme Danger

Heat stroke is imminent.

Tropical Depression - Level Winds

Wind strong enough to sway large branches; small trees in motion; light structural damage possible; caution advised.

Tropical Storm - Level Winds

Considerable wind; trees may be uprooted; minor structural damage; hazardous to outdoor activities.

Severe Tropical Storm - Level Winds

Heavy wind; widespread damage to weak structures; large branches broken; danger to light outdoor objects.

Typhoon - Level Winds

Violent wind; uprooted trees; significant structural damage; dangerous to all outdoor activities; stay indoors.

Super Typhoon - Level Winds

Extremely violent winds; widespread devastation; catastrophic damage expected; emergency measures imperative.

Light Rain

Individual drops easily identified and puddles(small muddy pools) form slowly. Small streams may flow in gutters.

Moderate Rain

Puddles rapidly forming and down pipes flowing freely

Heavy Rain

The sky is overcast, there is a continuous precipitation. Falls in sheets, misty spray over hard surfaces. May cause roaring noise on roofs.

Intense Rain

Flooding is threatening

Torrential Rain

Flooding is threatening

Minimal

Wear sunglasses on bright days. In winter, reflection off snow can nearly double UV strength. If you burn easily, cover up and use sunscreen.

Moderate

Take precautions, such as covering and using sunscreen, if you will be outside. Stay in shade near midday when the sun is strongest.

High

Protection against sunburn is needed. Reduce time in the sun between 11 a.m. and 4 p.m. Cover up, wear a hat and sunglasses, and use sunscreen

Very High

Take extra precautions. Unprotected skin will be damaged and can burn quickly. Try to avoid the sun between 11 a.m and 4 p.m. Otherwise, seek shade, cover up, wear a hat and sunglasses, and use sunscreen.

Extreme

Take all precautions. unprotected skin can burn in minutes. Beachgoers should know that white sand and other bright surfaces reflect UV and will increase UV exposure. Avoid the sun between 11 a.m and 4 p.m. Seek shade, cover up, wear a hat and sunglasses, and use sunscreen.

Low Humidity

Air is dry; may cause dry skin, irritation to eyes and respiratory passages. Hydration recommended.

Moderate Humidity

Comfortable humidity range for most people; minimal effects on health or comfort.

High Humidity

High humidity; may feel sticky and uncomfortable. Heat stress risk increases during activity.

Extreme Humidity

Extremely high humidity; risk of heat exhaustion or heat stroke rises significantly. Stay hydrated and limit strenuous activity.

Very Low Pressure

Indicates stormy or unstable weather; low pressure often associated with rain or strong winds.

Low Pressure

Slightly low atmospheric pressure; conditions may favor cloudiness or precipitation.

Normal Pressure

Average atmospheric pressure; weather generally stable and fair.

High Pressure

High pressure; usually indicates clear, calm weather with minimal precipitation.

Very High Pressure

Extremely high pressure; very stable, dry weather. Can contribute to haze or fog under certain conditions.

Dim Light

Very low light levels; reading or detailed work may be difficult without artificial lighting.

Indoor Lighting

Typical home or office lighting; suitable for general indoor activities.

Office Lighting

Bright indoor environment; suitable for detailed tasks and office work.

Bright Indoor Lighting

Very bright indoor conditions; ideal for precise visual tasks and reducing eye strain.

Overcast Daylight

Natural daylight on an overcast day; generally comfortable for outdoor activity.

Full Daylight

Bright daylight without direct sun; safe for outdoor activities but consider sunglasses for comfort.

Direct Sunlight

Direct sunlight; can cause glare and eye strain; UV exposure risk is high; protection recommended.