Cyclone Watch and Act 4C.1
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Cyclone Watch and Act 4C.1 Students to explore tropical cyclone Engage Cyclone Watch and Act weather, warning systems and tropical cyclone risk to communities. In the event of a tropical cyclone approaching the Western Australian coast, the Department of Fire and Emergency Services issues colour coded alerts – and , to provide warnings and advice to communities in the cyclone’s path. The Bureau of Meteorology (BoM) is an Australian government organisation that provides forecasts, warnings, weather observations and advice to the Australian community. Australia's area of responsibility for cyclone services is divided between three Tropical Cyclone Warning Centres (TCWCs): Perth, Darwin and Brisbane. A tropical cyclone watch is issued for coastal communities when the onset of gales is expected within 48 hours, but not within 24 hours. A tropical cyclone warning is issued for coastal communities when the onset of gales is expected within 24 hours, or are already occurring. These centres use weather stations, reports from observers in ships, aircraft, offshore oilrigs and on- land observers, satellite and radar imagery to detect cyclones and to confirm their location, intensity and to track their progress. Once a cyclone is within 250 kilometres of Western Australia it is tracked by radars located along the coastline. Its track can be monitored by one of BoM’s weather watch radars at Wyndham, Broome, Port Hedland, Karratha, Dampier, Learmonth or Carnarvon. BoM will issue a Tropical Cyclone Advice and a Forecast Track Map to indicate where the cyclone is, where it is forecast to go, how intense it is likely to be and which communities are under threat. A tropical cyclone can change direction therefore, a much larger region than the actual area affected is warned so communities will be prepared. Objective: Students explore how tracking, predicting, and warning communities about tropical cyclone can lesson risks to communities. Cyclone Watch and Act - Warning Systems • Students visit the DFES website here to identify the agencies who advise communities when and how to prepare for cyclones. (Cyclone Watch and Act 4C.2) • Introduce students to the BoM website’s tropical cyclone warning services http://www.bom.gov.au/cyclone/. As a class discuss the difference between a tropical cyclone watch and a tropical cyclone warning. (Cyclone Watch and Act 4C.2) • Students use the DFES website (www.dfes.wa.gov.au) for information on the cyclone warning system and find the Alerts & Warnings page to check for any current tropical cyclone alerts or warnings. Use the BoM website (www.bom.gov.au) to (i) record any current active cyclones and, (ii) a cyclone which has moved through Western Australia. Students record relevant information. (Cyclone Watch and Act 4C.3) • Students access the BoM website: ‘Forecasting the weather’ to plot a cyclone track. Discuss how people and communities can benefit from weather forecasting. How helpful is a Forecast Track Map for communities? (Cyclone Watch and Act 4C.4) • Watch the news videos of Tropical Cyclone Lua (Tropical Cyclone News 3) or Tropical Cyclone Rusty (Tropical Cyclone News 4) and use the information to write a radio Community Service Announcement. Include DFES alerts, weather warnings and cyclone information to advise the community how to prepare before the arrival of the cyclone. • Home activity: Survey one or two adults in your household, record responses to information about weather advice, BoM cyclone advice and DFES cyclone alerts. As a class, compare and discuss the completed surveys. (Cyclone Watch and Act 4C.5) Natural Hazards Years 5-7 Page 1 Cyclone Watch and Act 4C.2 Cyclone Warning Systems – Use the web links below to answer these questions about Cyclone Warning Systems. DFES: http://www.dfes.wa.gov.au/safetyinformation/warningsystems/Pages/default.aspx BoM: http://www.bom.gov.au/cyclone/ Cyclone Warning Systems How does DFES know if a damaging gales and winds are expected? What is the name of the BoM map which shows a tropical cyclone’s path? What are the FOUR stages of alerts DFES provides when a cyclone warning is issued? 1. 2. 3. 4. Which two BoM warning services provide information when a cyclone or damaging gales and winds are expected between 48 and 24 hours? ___________________________ ___________________________ Why would a radio broadcast the Standard Emergency Warning Signal (SEWS)? What text message might you receive as an Emergency Alert if a tropical cyclone was expected in a few hours? Natural Hazards Years 5-7 Page 2 Cyclone Watch and Act 4C.3 Cyclone Alerts and Warnings – Use the BoM website (www.bom.gov.au) to complete the following questions: What do you think the acronym BoM stands for? _______________________________________________________________________________ _______________________________________________________________________________ Use the DFES website www.dfes.wa.gov.au/safetyinformation/warningsystems and the BoM website to find out if there are any current cyclone alerts or warnings. If there are no current alerts, use the excerpt from Tropical Cyclone Rusty in the Cyclone Alerts and Warnings Teacher Notes on Pages 7-9. CURRENT CYCLONE ALERTS AND WARNINGS DFES BoM Why is it important to follow the alerts and warnings? What could happen if the alerts were not followed? Natural Hazards Years 5-7 Page 3 Cyclone Watch and Act 4C.4 Forecasting the Weather – Use the BoM website to track Severe Tropical Cyclone Alfred: http://www.bom.gov.au/cyclone/about/warnings/sample/map.shtml Tropical Cyclone Alfred Forecast Track Map As Severe Tropical Cyclone Alfred approached the coast of Western Australia, BoM issued a tropical cyclone watch. Look at the Forecast Track Map and create a timeline. Timeline Information: Date Time Category Number Towns affected by gales/winds When would the DFES colour coded alerts be used to warn the community? When would the DFES colour coded alerts be used to warn the community? How helpful is a Forecast Track Map for communities? How helpful is a Forecast Track Map for communities? Natural Hazards Years 5-7 Page 4 Cyclone Watch and Act 4C.5 Home Survey – What information do I need to know about tropical cyclone weather warnings and alerts? Use the questions below to prepare your own answer sheet. You will find the correct responses on the DFES website. Ask one or two adults in your family to take the Home Survey to find out what they know about tropical cyclone weather advice, weather warnings and community alerts. Ask them the four questions and record yes or no for each correct or incorrect answers. Add the ticks and crosses in each column to find out how aware (or unaware) each adult is about tropical cyclone weather advice and warnings. Tropical Cyclone Alerts and Warnings Home Survey Use the Question and Answer Sheet Adult One Adult Two Questions Yes No Yes No What State Government agency provides information about tropical cyclones? Tropical cyclone weather warnings are also available on the BoM website. What does BoM mean? What is the difference between a cyclone watch and a cyclone warning? DFES issues four colour coded Community Alerts after a cyclone warning is issued – what does each alert mean? TOTAL What do the results of your survey show? What do the results of your survey show? Compare your results as a class. Are most adults aware of DFES warnings and alerts? As a class, think of ways you could inform the adults about tropical cyclone weather warnings and alerts. Natural Hazards Years 5-7 Page 5 Page 5 Teacher Notes 4C Answers: Cyclone Warning Systems 4C.2 How does DFES know if a damaging gales and winds are expected? BoM will issue cyclone watch and cyclone warning advice, DFES then provides community alerts to keep people informed and safe. What is the name of the BoM map which shows a tropical cyclone’s path? Tropical cyclone forecast track map What are the FOUR stages of alerts DFES provides when a cyclone warning is issued? 1. YELLOW ALERT 2. BLUE ALERT 3. RED ALERT Cyclone Watchers4. ALLAnswers CLEAR Which two BoM warning services provide information when a cyclone or damaging gales and winds are expected between 48 and 24 hours? 48 hours – Cyclone Watch 24 hours – Cyclone Warning The Standard Emergency Warning Signal (SEWS) is a community alert issued if there is a threat of extreme danger. An Emergency Alert will display a caller identification 0444 444 444. The warning will provide important information about the emergency in your location and what your family should do to stay safe. Cyclone Alerts and Warnings 4C.3 BoM – Bureau of Meteorology Forecasting the Weather 4C.4 Community alerts will be issued by DFES when a cyclone is coming and when damaging winds or gales are likely to affect communities within 24 hours. Forecast Track Maps are very helpful for communities as they show the current movement of a cyclone and where it is likely to head in the future. The map includes information about the gale force, storm force and the possible size of hurricane force winds and where they are likely to go. If the cyclone is approaching the coast, cyclone Watch and Warning zones will be highlighted. Forecast Track Maps are updated every six hours and more frequently if a cyclone Watch or Warning is current. Natural Hazards Years 5-7 Page 6 Teacher Notes 4C Cyclone Alerts and Warnings This is an EXCERPT of an actual DFES Alert that was issued on 27 February 2013 as Tropical Cyclone Rusty approached the West Australian coastline ATTENTION ABC: This is an emergency broadcast from the Department of Fire and Emergency Services. It is essential that the words are not changed. (ATTENTION RADIO and TV serving the area including Marble Bar and Nullagine Standard Emergency Warning Signal to be sounded for five – 10 seconds before broadcasting the following warning.) Time of issue: 9.30pm Date of issue: 27 February 2013 Red Alert for Pardoo to Nullagine including Marble Bar in the Pilbara COMMUNITY ALERT LEVEL: A RED ALERT is current for people in or near the coastal and inland communities of Pardoo to Nullagine, including Marble Bar in the Pilbara.