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Wind Speed Legend

  Description Beaufort kt km/h
icon icon Calm - Light Winds 0-3 0-10 0-19
icon Moderate Winds 4 11-16 20-30
icon Fresh Winds 5 17-21 31-39
icon Strong Winds - Near Gale 6-7 22-33 40-61
icon Gale - Strong Gale 8-9 34-47 62-87
icon Storm - Hurricane 10-12 48+ 88+

Temperature Legend

°C°F
< -5< 23
-5 - 023 - 32
0 - 532 - 41
5 - 1041 - 50
10 - 1550 - 59
15 - 2059 - 68
20 - 2568 - 77
25 - 3077 - 86
30 - 3586 - 95
35 - 4095 - 104
≥ 40≥ 104

Relative Humidity Legend

< 25% 25-50% 50-75% ≥ 75%

Frost Risk Legend

Nil Low Slight Moderate High Severe

UV Index Legend

Low Moderate High Very High Extreme

Radar/Satellite Animator Symbols

Rainfall Intensity

light dBz scale heavy

The intensity of rainfall detected by weather radars is indicated using the above scale.

Doppler Wind

90km/h towards velocity scale 90km/h away

On Doppler radar images the radial component of the movement of particles in the air is indicated using the above scale.

Lightning Events

lightning Lightning strikes are displayed as crosses (ground events) or squares (cloud events) and fade from white (current) to red (30 minutes ago) to blue (60 minutes ago). Positive strikes appear as diagonal crosses.

Accumulated Rainfall (since 9am)

rainfall Rainfall since 9am local time is displayed with coloured dots.

Observations Rose

observations Surface observations are displayed as a 'rose' with temperature, dew point and relative humidity down the left-hand side and rainfall since 9am, pressure and location name displayed down the right-hand side.

Temperatures fade in colour from blue (cold) to red (warm) and dew points fade in colour from blue (moist) to red (dry).

How to Read a Wind Barb
wind barbs

A wind barb is a compact means of representing both wind speed and direction graphically.

Each full-barb represents 10 knots (nautical miles per hour), a half-barb 5 knots and a flag 50 knots. Calm conditions are indicated by a dot only. 1 knot is equal to around 1.9km/h.

In the examples to the left the first indicates a 5 knot wind from the south-west, the second a 15 knot wind from the west-north-west, the third a 45 knot easterly and the fourth a 65 knot northerly.

Warnings

Warnings
Severe weather, thunderstorm, tropical cyclone
Fire weather
Flood
Coastal wind
Graziers, bush walkers, frost

Sentinel Hotspots

Sentinel hotspots detected within the last 6 hours are displayed. Sentinel is a satellite-based national bushfire monitoring system operated by Geoscience Australia.

Sentinel Hotspots
≥ 150°C
≥ 100°C
≥ 50°C
< 50°C

Weather Forecast Icons

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Clearing shower
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Cloudy
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Cloud and wind increasing
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Cloud increasing
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Drizzle
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Drizzle clearing
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Fog then sunny
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Frost then sunny
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Hazy
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Heavy rain
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Heavy showers
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Increasing sunshine
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Late shower
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Late thunder
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Mostly cloudy
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Mostly sunny
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Overcast
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Possible shower
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Possible thunderstorm
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Rain
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Rain and snow
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Rain clearing
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Rain developing
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Rain tending to snow
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Showers
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Showers easing
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Showers increasing
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Snow
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Snowfalls clearing
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Snow developing
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Snow showers
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Snow tending to rain
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Sunny
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Thunderstorms
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Thunderstorms clearing
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Windy
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Windy with rain
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Windy with showers
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Windy with snow
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Wind and rain increasing
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Wind and showers easing

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A day of two halves for Sydney

17:27 EST Saturday proved had two very distinct halves on Saturday with a grim morning giving way to a glorious afternoon.

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