NASA sees Tropical Cyclone Alessia form, threaten western Australia

Nov 22, 2013 by Rob Gutro
The MODIS instrument aboard NASA's Terra satellite captured this image of newly-developed Tropical Cyclone Alessia on Nov. 22 at 02:20 UTC. Credit: NASA Goddard MODIS Rapid Response Team

The low pressure area previously known as System 90S has continued organizing and consolidating and infrared data from NASA's Aqua satellite helped confirm its strengthening into Cyclone Alessia in the Southern Indian Ocean. Alessia formed off of Western Australia's Kimberley coast and the first Cyclone Warnings and Watches of the season are now in effect.

The Moderate Resolution Imaging Spectroradiometer instrument called MODIS that flies aboard NASA's Terra satellite captured a visible image of newly-developed Tropical Cyclone Alessia on Nov. 22 at 02:20 UTC/Nov. 21 at 9:20 p.m. EST. The image showed good circulation and bands of thunderstorms wrapping around the center of circulation from the east and west. Even multispectral satellite imagery showed that the bands of thunderstorms had become more tightly wrapped around the storm's center.

On November 22 at 0900 UTC/4 a.m. EST, Tropical Cyclone Alessia was located about 237 nautical miles/ 272.7 miles/438.9 km northwest of Broome, Australia, near 14.5 south latitude and 120.1 east longitude. Cyclone Alessia had maximum sustained winds near 35 knots/40 mph/62 kph. Alessia was moving to the east-southeast at 14 knots/16.1 mph/25.9 kph toward Western Australia. Forecasters are expecting Alessia to move in a more easterly direction toward Darwin.

Warnings and watches are already in effect for Western Australia. A Cyclone Warning is in effect from Cockatoo Island to Wyndham, and a Cyclone Watch is in effect from coastal areas from Wyndham to Cape Hotham.

According to the bulletin from the Australian Bureau of Meteorology or ABM, gales may develop along the northern Kimberley coast on November 23 as Alessia approaches the coast. The tropical cyclone is expected to brush the northern Kimberley coast and weaken as it approaches the west of the Top End on Sunday, November 24. Forecasters at the ABM expect rainfall to be limited to . For updated warnings and watches, visit ABM's website at: http://www.bom.gov.au/wa/warnings/.

The Joint Typhoon Warning Center or JTWC forecasters expect Alessia to strengthen before making landfall near Darwin in the next couple of days. The JWTC noted that after Alessia makes landfall it will move across the swampy terrain of northern Australia just south of Darwin and should dissipate in five days (by November 27).

Explore further: Scientists make strides in tsunami warning since 2004

add to favorites email to friend print save as pdf

Related Stories

Tropical Cyclone 04B forms in northern Indian Ocean

Nov 19, 2013

The fourth tropical cyclone of the Northern Indian Ocean season formed and is headed for landfall in a couple of days in southeastern India. NASA's TRMM satellite saw broken bands of thunderstorms with moderate ...

NASA satellites see Cyclone 03A make landfall in Somalia

Nov 12, 2013

Tropical Cyclone 03A made landfall in Somalia and moved inland where it is dissipating over eastern Ethiopia today, Nov. 12. NASA's Aqua, Terra and TRMM satellites passed over the cyclone an captured images ...

NASA sees Cyclone Rusty threatening Western Australia

Feb 25, 2013

Tropical Cyclone Rusty formed on Feb. 24 and has already caused warnings up for the residents of northwestern West Australia, including Port Hedland. NASA's Terra satellite saw that outer bands of this quick-forming ...

Recommended for you

Scientists make strides in tsunami warning since 2004

7 hours ago

The 2004 tsunami led to greater global cooperation and improved techniques for detecting waves that could reach faraway shores, even though scientists still cannot predict when an earthquake will strike.

Trade winds ventilate the tropical oceans

7 hours ago

Long-term observations indicate that the oxygen minimum zones in the tropical oceans have expanded in recent decades. The reason is still unknown. Now scientists at the GEOMAR Helmholtz Centre for Ocean Research ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.