Here's an excerpt of the latest BOM Advice on Severe Tropical Cyclone Monica.

TROPICAL CYCLONE WARNING

TROPICAL CYCLONE ADVICE NUMBER 61
Issued by the BUREAU OF METEOROLOGY, DARWIN
at 8:00 am CST Monday 24 April 2006

A CYCLONE WARNING is now current for coastal and island communities between CAPE WESSEL and DALY RIVER MOUTH, including DARWIN, the TIWI ISLANDS, COBOURG PENINSULA and JABIRU.

A CYCLONE WATCH extends southwest between DALY RIVER MOUTH and PORT KEATS.

The CYCLONE WARNING between NHULUNBUY and CAPE WESSEL has been cancelled.

At 7 am CST SEVERE TROPICAL CYCLONE Monica CATEGORY 5 was located about 80 kilometres north of ELCHO ISLAND, 180 kilometres northwest of NHULUNBUY and 520 kilometres east northeast of DARWIN, moving west at 13 kilometres per hour. The
cyclone will move further west and closer to the coast later today. The cyclone is then expected to weaken slightly as it passes over the COBOURG PENINSULA
tonight, but will still be a SEVERE TROPICAL CYCLONE as it moves across the northwest DARWIN-DALY and TIWI ISLANDS area during Tuesday.

The VERY DESTRUCTIVE core of SEVERE TROPICAL CYCLONE Monica with gusts to 350 kilometres per hour (217 mph) is currently affecting the islands off the northeast Arnhem Land coast and is expected to cross the north coast between MANINGRIDA and
CROKER ISLAND later today, and approach DARWIN-DALY and TIWI ISLAND area on Tuesday afternoon.

DESTRUCTIVE WINDS with gusts to 160 kilometres per hour (99.2 mph) are currently being experienced on the remaining islands about the northeast Arnhem Land coast, and should extend further west to CAPE DON by tonight.

GALES with gusts to 100 kilometres per hour (62 mph) are currently being experienced on the northeast Arnhem Land coast, and will extend westward ahead of the cyclone, reaching the northwest DARWIN-DALY and TIWI ISLANDS area on Tuesday morning.

http://www.bom.gov.au/cgi-bin/wrap_fwo.pl?IDDP0002.txt

Wind speeds in bold are my rough calculations~danielw

Details of SEVERE TROPICAL CYCLONE Monica at 7 am CST:
. Centre located near...... 11.3 degrees South 135.5 degrees East
. Location accuracy........ within 30 kilometres
. Recent movement.......... towards the west at 13 km/h
. Wind gusts near centre... 350 kilometres per hour
. Intensity................ CATEGORY 5
. Central pressure......... 915 hectoPascals