Tropical Cyclones: Preparing for the Storm
What is a Tropical Cyclone?
A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms.
Tropical Cyclone Classifications
Tropical cyclones are classified according to their wind speeds on the Saffir-Simpson scale:
- Tropical depression: Winds below 39 mph (63 km/h)
- Tropical storm: Winds between 39-73 mph (63-118 km/h)
- Category 1 hurricane: Winds between 74-95 mph (119-153 km/h)
- Category 2 hurricane: Winds between 96-110 mph (154-177 km/h)
- Category 3 hurricane: Winds between 111-129 mph (178-208 km/h)
- Category 4 hurricane: Winds between 130-156 mph (209-251 km/h)
- Category 5 hurricane: Winds of 157 mph (252 km/h) or higher
Tropical Cyclone Impacts
Tropical cyclones can cause devastating impacts, including:
- Storm surge: A wall of water that can reach heights of up to 20 feet (6 meters)
- High winds: Damaging winds that can reach speeds of up to 150 mph (240 km/h)
- Heavy rainfall: Torrential rains that can cause flooding and mudslides
- Tornadoes: Smaller storms that can spawn from tropical cyclones
Tropical Cyclone Preparedness
Preparing for a tropical cyclone is essential to minimize its potential impact:
- Develop an evacuation plan and identify safe places to go
- Stock up on emergency supplies, such as food, water, first aid kits, and batteries
- Secure your home by boarding up windows and reinforcing doors
- Stay informed about weather forecasts and warnings
Tropical Cyclone Warnings
Tropical cyclone warnings are issued by meteorological agencies to alert the public of an impending storm:
- Tropical cyclone watch: A warning that tropical cyclone conditions are possible within 48 hours
- Tropical cyclone warning: A warning that tropical cyclone conditions are expected within 24 hours
When a Tropical Cyclone Warning is in Effect
When a tropical cyclone warning is in effect, it is important to take the following precautions:
- Stay indoors and away from windows
- Listen to the radio or television for updates
- If you must evacuate, follow the instructions of local authorities
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