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Legends

Wind Speed

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

Temperature

°C	°F
< -5	< 23
-5 - 0	23 - 32
0 - 5	32 - 41
5 - 10	41 - 50
10 - 15	50 - 59
15 - 20	59 - 68
20 - 25	68 - 77
25 - 30	77 - 86
30 - 35	86 - 95
35 - 40	95 - 104
40 - 45	104 - 113
> 45	> 113

Relative Humidity

< 25%

25-50%

50-75%

≥ 75%

Frost Risk

Nil

Low

Slight

Moderate

High

Severe

UV / Pollen Levels

Low

Moderate

High

Very High

Extreme

Radar/Satellite Animator Symbols

Rainfall Intensity

light

heavy

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

Doppler Wind

90km/h towards

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 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 since 9am local time is displayed with coloured dots.

Observations Rose

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

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.