This lesson provides guidance for operational forecasters needing to combine different intensity methods to determine the intensity of a tropical cyclone.
Each of the intensity methods is summarized, focusing on both strengths and weaknesses. These methods include the Dvorak technique, surface observations, scatterometry, the Advanced Dvorak Technique (ADT), microwave sounders (AMSU), SATCON, and subjective interpretation of passive microwave patterns. Consideration of the previous intensity estimate and forecast is also examined.
Three case studies task the learner with combining the various methods to derive appropriate intensity estimates and a final quiz tests learner knowledge to demonstrate successful completion of the lesson.
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After completing this lesson, the learner will be able to:
- Describe the intensity of a circulation and how it is estimated.
- Describe the features, strengths and weaknesses of the following methods in determining the intensity of a circulation:
- Dvorak Technique
- Advanced Dvorak Technique
- surface observations
- scatterometry
- microwave
- AMSU
- SATCON
- Combine and utilize the different intensity methods to determine the intensity of a tropical circulation in a range of situations.
tropical cyclone, intensity, maximum wind, central pressure, Dvorak Technique, ASCAT, scatterometry, surface observations, AMSU, ADT, SATCON, policy, microwave sounders, subjective consensus, cloud patterns, curved band, shear pattern, eye pattern, CDO, embedded centre, visible, enhanced IR, typhoon, hurricane
November 2015: The lesson was updated to include information about RapidScat, which was launched on 20 September 20, 2014, for deployment aboard the International Space Station.
