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Broadmeadows, Victoria, Australia

Latitude: 37° 41' 25'' S

Longitude: 144° 56' 51'' E

20 September 2012 1617 (Local Time)
Camera direction: towards SE

Image P/S code: P.4.2

Image I.D.: 5939

C_L = 0, C_M = 5, C_H = /

Altocumulus stratiformis opacus and anti-crepuscular rays
The photo shows an invading extensive layer of Altocumulus in the form of merged rounded masses. Ceilometer data indicated the height of the base as 2 400 m (8 000 ft); this was in agreement with an earlier nearby upper-air sounding.

The cloud was thick enough throughout to mask the position of the Sun. The leading edge of the layer can be seen near the south-east horizon, which confirms the layer is still in the process of invading. A mild example of anti-crepuscular rays can also be seen toward the anti-solar point.
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© Michael Bruhn
Broadmeadows, Victoria, Australia
Latitude: 37° 41' 25'' S
Longitude: 144° 56' 51'' E
20 September 2012 1617 (Local Time)

Camera direction: towards SE
C_L = 0, C_M = 5, C_H = /
Image P/S code: P.4.2
Image I.D.: 5939
A trough and associated low pressure system were approaching from the west, bringing unsettled weather.
© Commonwealth of Australia 2012, Bureau of Meteorology

Altocumulus stratiformis opacus and anti-crepuscular rays