warning of tropical cyclone Flashcards
(20 cards)
What are the three main parameters used to detect a tropical cyclone?
Fall in pressure, increase in wind velocity, and the direction/movement of the storm.
What instruments are used to monitor tropical cyclones?
Satellites, aircraft with weather radars, and very high-resolution radiometers.
How early can cyclones be detected with modern technology?
Cyclones can be detected from their genesis on the high seas, with warnings issued at least 48 hours before landfall.
What is the accuracy of cyclone predictions made 12 hours in advance?
Predictions made 12 hours in advance are more precise but still have some uncertainty.
What is the 4-stage IMD warning system for tropical cyclones?
1) Pre-Cyclone Watch, 2) Cyclone Alert (Yellow), 3) Cyclone Warning (Orange), 4) Post-landfall Outlook (Red).
When is the Pre-Cyclone Watch issued?
When a depression forms over the Bay of Bengal, at least 72 hours before adverse weather begins.
How often is the Pre-Cyclone Watch issued?
At least once a day.
When is the Cyclone Alert (Yellow Code) issued?
At least 48 hours before bad weather starts, when the cyclone is beyond 500 km from the coast.
How frequently is the Cyclone Alert (Yellow Code) updated?
Every three hours.
When is the Cyclone Warning (Orange Code) issued?
At least 24 hours before bad weather starts, when the cyclone is within 500 km of the coast.
What additional information does the Cyclone Warning (Orange Code) include?
The estimated time and place of landfall.
When is the Post-landfall Outlook (Red Code) issued?
12 hours before landfall, when the cyclone is within 200 km of the coast.
Why is the Post-landfall Outlook (Red Code) important?
It provides highly accurate information on landfall timing and associated bad weather.
What color code is given for Pre-Cyclone Watch?
No specific color code, just a general watch.
What color code is assigned for a Cyclone Alert?
Yellow.
What color code is assigned for a Cyclone Warning?
Orange.
What color code is assigned for a Post-landfall Outlook?
Red.
Why is satellite monitoring crucial for cyclone warnings?
It provides real-time imaging of cloud cover and storm structure for better prediction.
What is the biggest challenge in predicting cyclone movement?
Variability in the storm’s path due to wind patterns and oceanic conditions.
How has modern technology improved cyclone warning systems?
Early detection, better tracking, real-time updates, and improved accuracy in landfall predictions.
