773. Tropical Storm Seroja » Text Products

May 18th, 2021 at 07:13 AM

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PUBLIC ADVISORY #
FORCE THIRTEEN , 

    
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SUMMARY OF INFORMATION
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LOCATION...NEAR    ...
MAXIMUM SUSTAINED WINDS...MPH...KM/H
MINIMUM CENTRAL PRESSURE...MB
    
WATCHES AND WARNINGS
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DISCUSSION
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Current position of tropical cyclone Seroja accuracy is high due to the system
being visible on radar and surface observations. 

As the system is over land Dvorak is not applicable. Maximum wind speeds of 43
knots [gusting to 60 knots] have been observed at Goodlands [1730Z] and Kalannie
[1740Z] weather stations, located in the northeast quadrant of the system. These
masts are 3 metres high and thus could still be observing destructive wind gusts
if converted to a height of 10 metres. Gales are no longer being observed in the
southwest quadrant. Intensity set at 50 knots.

The system made landfall between Kalbarri and Northampton around 1130Z as a
category 3 system. It has continued to weaken as it moves southeast over land
under the influence of a mid-level high to the northeast and an approaching
mid-latitude trough to the southwest. 

CIMSS shear at 15Z was estimated at 20-25 knots. It will continue to move
quickly to the southeast at approximately 35 knots during early Monday morning,
remaining over land and weakening into a tropical low. Gales may persist on the
northeast quadrant during Monday morning at it moves towards the south coast of
Western Australia. Seroja is expected to move off the south coast of Western
Australia during Monday afternoon and weaken further. 

LOCAL AND OFFICIAL SOURCES BELOW
Bureau of Meteorology
    

    
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Forecaster