CURRENT AFFAIRS
CURRENT AFFAIRS
Description
Tropical Cyclone Sean is currently affecting Western Australia, having recently strengthened to a Category 3 system. As of January 2025, the cyclone was downgraded from Category 4 and is predicted to weaken further as it moves into cooler waters. Significant rainfall has been recorded, particularly in Karratha, leading to local flooding and emergency warnings.
Development Of Cyclone Sean
Tropical Cyclone Sean originated on January 20, 2025, starting as a tropical disturbance and rapidly intensifying to Category 4. Key contributors to this intensification included warm sea surface temperatures, a low-pressure system, and minimal vertical wind shear.
Conditions For Tropical Cyclone Formation
Warm Sea Surface Temperatures: A temperature above 27°C is crucial for cyclone development.
Low-Pressure Area: A key component for the cyclone’s formation.
Coriolis Force: Causes the rotation of the storm.
Minimal Vertical Wind Shear: Stability in the vertical wind profile aids cyclone growth.
Cyclone Structure
Eye - The calm center with low pressure.
Eyewall - The region with the strongest winds and heaviest rainfall.
Moisture and Updrafts - Warm air rising from the ocean fuels the storm's development by forming clouds.
Impacts Of Tropical Cyclone Sean
Record Rainfall - Karratha saw 274 mm of rain within 24 hours, setting a new record.
Flooding - The heavy rainfall led to localized flooding.
Flood Risks - Flash floods were reported, prompting emergency alerts, especially along the Pilbara Coast.
Community Disruptions - Emergency services responded to water rescues and power outages, and some roads, including the North West Coastal Highway, were partially impacted. However, no major damage was reported as the cyclone did not make direct landfall.
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