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25 December 2011

Satellite Image: Cyclone Grant, Northern Australia


Infrared image courtesy of the Japan Meteorological Agency. Blue Marble surface image courtesy of NASA.
(Click on image for larger view.)

Satellite Notes for the 0000UTC chart on 25 December 2011
Issued at 12:34 pm EDT Sunday on 25 December 2011
The scattered showers and storms over the Top End are associated with Tropical Cyclone 'Grant'.

Showers and storms also extend over northern Queensland along an active monsoon trough that further extends to Ex-Tropical Cyclone Fina over the Coral Sea.

A low level trough that extends over southern parts of the country is responsible for the patchy middle level cloud over southern parts of Western Australia and South Australia and the isolated showers and storms over parts of New South Wales, Victoria and Tasmania.

IDD20150
Australian Government Bureau of Meteorology
Northern Territory
Tropical Cyclone Warning Centre

Media: The Standard Emergency Warning Signal should NOT be used with this
warning.

TOP PRIORITY FOR IMMEDIATE BROADCAST

TROPICAL CYCLONE WARNING

TROPICAL CYCLONE ADVICE NUMBER 24
Issued at 1:41 pm CST on Sunday 25 December 2011

A Cyclone WARNING is current for coastal areas from Dundee Beach to Milingimbi
including the Tiwi Islands and Darwin .

A Cyclone WATCH continues for coastal areas from Milingimbi to Nhulunbuy and
inland to Jabiru and Oenpelli .

At 12:30 pm CST Tropical Cyclone Grant, Category 1 was estimated to be
35 kilometres northeast of Croker Island and
270 kilometres northeast of Darwin
and is moving east southeast at 7 kilometres per hour.

Category 1 Tropical Cyclone Grant has moved southeast over recent hours, but is
expected to move south over the Cobourg Peninsula tonight and into the Van
Diemen Gulf during Monday. Present indications have it crossing the coast again
east of Darwin later on Monday.

GALES with gusts to 110 kilometres per hour are currently being experienced
over the Cobourg Peninsula, including Cape Don and Croker Island, and are
expected to extend along the coast between Cape Fourcroy and Milingimbi,
including the Tiwi Islands later today.

DESTRUCTIVE WINDS with gusts to 130 kilometres per hour are expected to develop
as the cyclone intensifies, affecting parts of the coast between Snake Bay and
Croker Island tonight.

Darwin may experience GALES on Monday on the edge of the tropical cyclone as it
passes to the east. GALES may also extend inland to Jabiru and Oenpelli on
Monday.

GALES may extend further east to Nhulunbuy on Monday if the tropical cyclone
takes a more easterly path.

Coastal residents between Cape Don and Goulburn Island are specifically warned
of a DANGEROUS STORM TIDE as the cyclone centre crosses the coast. Tides are
likely to rise significantly above the normal high tide, with DAMAGING WAVES
and DANGEROUS FLOODING.

HEAVY RAIN is expected to cause localised flooding and significant stream rises
over the northern Darwin-Daly, Arnhem and northern Roper-McArthur Districts.
The Territory Controller advises residents from west of Goulburn Island to
Snake Bay, including Cape Don to TAKE SHELTER NOW.

Residents of remaining areas from Dundee Beach to Milingimbi should now make
final preparations to your home shelter or identify which public emergency
shelter to use.

For communities under Watch, now is the time to put together your emergency
kit, clear your yards and balconies, and commence home shelter preparations.

The Territory Controller advises residents of Darwin and Rural Areas that if
you DO NOT have accommodation constructed to the Building Code or are unsure of
your present accommodation you should decide which public emergency shelter to
use. You should now have your emergency kit complete and ready. DO NOT PROCEED
TO PUBLIC EMERGENCY SHELTERS UNTIL ADVISED TO DO SO.

REPEATING: Residents from west of Goulburn Island to Snake Bay, including Cape
Don, are advised to TAKE SHELTER NOW.

Details of Tropical Cyclone Grant at 12:30 pm CST:

.Centre located near...... 10.9 degrees South 132.8 degrees East
.Location accuracy........ within 45 kilometres
.Recent movement.......... towards the east southeast at 7 kilometres per hour
.Wind gusts near centre... 110 kilometres per hour
.Severity category........ 1
.Central pressure......... 984 hectoPascals

Please ensure that neighbours have heard and understood this message,
particularly new arrivals or those who may not fully understand English.

The next advice will be issued by 5:00 pm CST Sunday 25 December.

This advice is available on telephone NT-1300 659 211

A map showing the track of the cyclone is available at:
http://www.bom.gov.au/weather/cyclone

- Australian Bureau of Meteorology