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Severe Tropical Cyclone George formed in March 2007 in the southeast Indian Ocean off the coast of Western Australia. Several climatological factors influenced its formation and intensity, including a La Niña climate pattern and the position of the Intertropical Convergence Zone. Cyclone George strengthened to a Category 5 storm before making landfall near Port Hedland, Western Australia with winds up to 125 mph. Despite moving over land, George maintained its low-level circulation for over 24 hours due to high humidity and flat terrain before weakening.
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A summarised presentation of a study conducted by Cam Leitch and Shane Holborn for the Queensland Australia nursery industry investigating damage from cyclones (hurricanes) and high wind events.
tropical_cyclones.ppt
This document provides information on tropical cyclones, including their development, stages, characteristics, forecasting, and mitigation strategies. It defines a tropical cyclone and describes the environmental conditions needed for development. The stages of development from tropical wave to hurricane are explained. Characteristics like cloud formations, pressure patterns, and wind distributions are outlined. Forecasting methods and challenges are touched on, including improving forecast accuracy over time. Finally, strategies for mariners to monitor storms and evade tropical cyclones at sea or in port are presented.
Hurricanes
Hurricanes are powerful cyclonic storms that form over warm ocean waters and have sustained winds over 74 mph. They have a counter-clockwise rotation and low atmospheric pressure at the center. The hurricane season runs from June to November in the Atlantic. Hurricanes gain their energy from heat released by water evaporation. They have an eye, rainbands spiraling inward, and outer bands spiraling outward. Strength is measured by wind speed and pressure. The costliest hurricanes in recent US history have caused extensive damage and flooding due to increased development in vulnerable coastal areas.
2013 North Atlantic Hurricane & Typhoon Season Primer
The webinar addressed anticipated 2013 activity of North Atlantic hurricanes and Pacific typhoons and their effects on the reinsurance industry.
Summer seminar on "Hurricanes and Coastal Hazards"
The document summarizes a summer seminar on hurricanes and coastal hazards. It discusses the NOAA-JRC implementing arrangement for cooperation on topics like earth observation. It then covers hurricane hazards like winds, storm surge, rainfall and tornadoes. The Saffir-Simpson scale for categorizing hurricanes by wind speed is explained. National Hurricane Center products like forecasts, advisories and storm surge probabilities are outlined. The importance of being informed and having a plan is stressed.
Summer seminar on "Hurricanes and Coastal Hazards: - 27. july 2012
The document summarizes a summer seminar on hurricanes and coastal hazards. It discusses the NOAA-JRC implementing arrangement for cooperation on topics like earth observation. It then covers hurricane hazards like winds, storm surge, rainfall and tornadoes. The Saffir-Simpson scale for categorizing hurricanes by wind speed is explained. National Hurricane Center products like forecasts, advisories and storm surge probabilities are outlined. The importance of being informed and having a plan is stressed.
CAAC_Downbursts_Fog_KP
This document discusses using geostationary satellites to predict aviation weather hazards like downbursts and fog. It describes how satellite measurements can be used to calculate indices like the Microburst Wind Potential Index (MWPI) to forecast downburst wind speeds up to 3 hours in advance. Case studies of downbursts in Southern California in 2014 and fog in Salt Lake City in 2015 are presented, showing how satellite data matched observations. The conclusions emphasize that MWPI has conditional skill in forecasting thunderstorm winds and that fog can be detected using infrared channel brightness temperature differences from GOES satellites.
DSD-INT 2017 Keynote: Coastal Inundation Hazards on Fringing Coral Reefs and ...
This document summarizes coastal inundation hazards in Pacific Islands from tropical cyclones. It describes two major inundation events from Tropical Cyclone Pam in 2015 which affected Vanuatu and Tuvalu, and Tropical Cyclone Winston in 2016 which impacted Fiji and Tonga. Maps and images show the extent of inundation and damage from these storms. The document also discusses using numerical modeling and GPU processing to predict coastal inundation and develop early warning systems to help communities prepare for and adapt to these hazards.
Weather systems
1. Mid-latitude wave cyclones form as warm and cold air masses interact. They typically move from west to east, with characteristics like warm fronts, cold fronts, and occluded fronts. The warm sector behind a warm front experiences warm, clear weather.
2. Hurricanes and tornadoes are both intense storm systems, but hurricanes form over warm ocean waters and can extend over 300 miles while tornadoes are relatively small, land-based storms. Both pose severe dangers like high winds and storm surge.
3. Climate classification systems like Koppen identify different climate zones based on factors such as temperature and precipitation patterns. For example, Am is tropical rainy, BW is dry and subtropical, ET
Critical Capabilities For Wave Power Conversion In Mild To Moderate Wave Clim...
Michael Raftery presented research on harnessing wave power in mild, moderate, and extreme wave climates. He discussed developing a variable-depth, fully-submerged tension leg platform (TLP) to increase wave slopes and concentrate wave power. Testing of a scaled TLP model in a wave tank showed it could increase wave heights and power by 150-259% in mild waves and 71-69% in moderate waves. The research aims to develop solutions capable of efficiently capturing more wave power, eliminating failures, decoupling power take-off from generation, and avoiding extreme loads during storms.
Summer seminar hurricanes - 27. july 2012
The document summarizes a summer seminar about hurricanes and coastal hazards. It discusses the NOAA-JRC implementing arrangement for cooperation on topics like earth observation. It then covers hurricane hazards like winds, storm surge, rainfall and tornadoes. It explains the Saffir-Simpson scale for categorizing hurricane intensity and discusses key concepts like storm surge. It outlines products from the National Hurricane Center, like forecasts, watches and warnings. The presentation emphasizes the importance of being informed and making preparedness plans.
ICLR Forecast Webinar: 2014 Canadian hurricane season (June 20, 2014)
On June 20, 2014, the Institute for Catastrophic Loss Reduction (ICLR) conducted a Webinar with Bob Robichaud, Environment Canada's Warning Preparedness Meteorologist for Eastern Canada.
The interactive webinar included a review of the 2013 North-Atlantic hurricane season and concluded with a seasonal outlook for the 2014 North-Atlantic hurricane season.
Robichaud received his B.Sc. in meteorology from Lyndon State College, Vermont in 1995. After a few years as a weather forecaster in the private sector, he joined Environment Canada in 1998 as an aviation forecaster in Gander NL where he eventually became aviation weather program manager for Atlantic Canada. In 2003, Robichaud managed the National Aviation Weather Services contract with NAV CANADA and he has
also written a book on aviation weather for eastern Canada.
Robichaud moved to Halifax in 2004 to fill the new warning preparedness meteorologist role in Atlantic Canada where his primary focus is working closely with emergency management officials on a variety of different weather related issues including training,
exercising and support during actual weather events.
Cyclone vs Tornado
This document compares and contrasts cyclones and tornadoes. It defines each phenomenon, describes their typical geographic locations, characteristics such as rotation and wind speeds, how intensity is measured, methods of detection, examples of damage levels, and includes photos and videos. The document was presented by five students for their Disaster Management course, with guidance from their faculty advisor.
Hydrometeorological Hazards - Copy.pptx
This document discusses hydrometeorological hazards such as tropical cyclones, floods, and thunderstorms. It defines hydrometeorology as the study of the atmospheric and terrestrial phases of the hydrological cycle. Various tools are used to forecast and monitor these hazards, including weather satellites, Doppler radar, and automated rain gauges. The document also provides appropriate measures to take before, during, and after hydrometeorological events.
Climate change results for North and Central America
The document summarizes key findings from the IPCC's Sixth Assessment Report regarding climate change projections for North and Central America. Some common changes across the regions include increasing temperatures, more frequent and intense heat waves, and rising sea levels. However, precipitation projections vary by location. Northern areas are expected to receive more winter precipitation while Central America and the Caribbean will likely see decreases. The document also outlines more specific projections for sub-regions, including increased drought and flooding in some areas. An agenda is provided for an event discussing climate impacts in North and Central America.
Regional Climate Information: Small Islands - Tropical cyclones
This document summarizes key points from the Sixth Assessment Report of the Intergovernmental Panel on Climate Change Working Group I about the impacts of tropical cyclones on small islands. It notes that tropical cyclones can have devastating impacts through damaging winds, storm surge, and heavy rainfall, but can also provide beneficial water resources. The document discusses past trends of increased tropical cyclone intensity, higher proportion of strong storms, increased extreme sea levels, and potential slowing of storm speed. Projections indicate greater effects from tropical cyclones as temperatures increase further, including stronger storms, higher rainfall rates, increased storm surge, and potential increased lifetime. However, changes in frequency, location, and speed have low confidence in projections.
Similar to Final Presentation (20)
2013 North Atlantic Hurricane & Typhoon Season Primer
2013 North Atlantic Hurricane & Typhoon Season Primer
Summer seminar on "Hurricanes and Coastal Hazards"
Summer seminar on "Hurricanes and Coastal Hazards"
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Summer seminar on "Hurricanes and Coastal Hazards: - 27. july 2012
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ICLR Forecast Webinar: 2014 Canadian hurricane season (June 20, 2014)
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Regional Climate Information: Small Islands - Tropical cyclones
Final Presentation
- 1. The Climatological and Geographical Factors that Influenced the Formation of Severe Tropical Cyclone George By: Alannah Irwin http://eoimages.gsfc.nasa.gov/images/imagerecords/18000/ 18088/george_amo_2007068.jpg
- 2. Australian vs. North Atlantic Tropical Cyclone Intensity Scale http://rollingharbour.files.wordpress.com/2011/04/saffir- simpson-sm1.gif http://blog.metservice.com/wp- content/uploads/2011/01/categories.jpg
- 3. Australian Tropical Cyclone Basin • Range from 140°E to 90°E and 5°S to 40°S • Broken into 4 regions: Eastern, Northern, Northwestern, Western • Tropical Cyclone Warning Center (TCWC) in Brisbane, Darwin, and Perth • Average of 7 storms; more come from other basins • Only 5 reach Category 5 status (Australian scale) http://ars.els-cdn.com/content/image/1-s2.0- S0967064507000598-gr1.jpg
- 4. Main Causes of TC Formation in Southeast Indian Ocean • Shift of ITCZ • El Nino Southern Oscillation Cool Phase (La Nina) • Surface low pressure in SW Pacific • Standard favorable conditions http://www.theage.com.au/news/national/cycl one-kills- two/2007/03/09/1173166935560.html
- 6. El Niño vs. La Niña http://www.blueplanet. nsw.edu.au/
- 7. Severe Tropical Cyclone George • Began formation on 02 MAR 2007 • Moved inland to Kimberley, W. Australia • Intensified to Cat 1 in Joseph Bonaparte Gulf • Eventually became Cat 5 in Indian Ocean before landfall in Port Hedland, W. Australia • Lowest pressure 902 mb • Strongest 1-min max. sustained winds 125mph (110kt) w/ gusts of 180mph (155kt)
- 10. The Top End • Northern Territory geography aids TC formation • Flat land with river floodplains and grasslands • Low yearly T fluctuation
- 14. Circulation Over Land • George maintained low level circulation for over 24 hrs in W. Australia • Landfall pressure 933mb; winds 110kt (1232Z) • After landfall: – 08MAR2007 2203Z – Pressure 944mb; winds 100kt – 08MAR2007 2345Z –Pressure 976mb; winds 65kt – 09MAR2007 1215Z – Pressure 997mb; winds 35kt – 09MAR2007 2330Z –Pressure 997 mb; winds 35kt
- 16. Why? • High mid-level relative humidity around storm allowed for it to maintain itself • Non-mountainous terrain prevented strong shear from inhibiting circulation, despite elevation • Most importantly, differences in terrain are important, but the elevation itself is not as crucial (Demaria et al. 2005). http://www.map.net.au/3d-map- of-australia/
- 19. Conclusion • ITCZ has an influence on storm track and intensity • ENSO Cool Phase conditions were prevalent in March 2007 • Australia’s topography of Top End promotes TC formation • Severe TC George sustained circulation over W. Australia for 24 hrs http://www.lakeeriewx.com/Mete o241/ResearchTopicTwo/ProjectT wo.html
- 20. Sources • http://earthobservatory.nasa.gov - Visible Imagery • Australian Bureau of Meteorology - http://www.bom.gov.au/cyclone/ • Wikipedia – Cyclone George: http://en.wikipedia.org/wiki/Cyclone_George • Naval Research Laboratory (NRL) Tropical Cyclone Page - http://www.bom.gov.au/australia/charts/archive/ • Tropical Weather and Climate; University of St. Andrews - http://www.st-andrews.ac.uk/~dib2/climate/tropics.html • NOAA Climate Prediction Center - http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso stuff/ensoyears.shtml • NCEP/NCAR Reanalysis - http://nomad3.ncep.noaa.gov/cgi- bin/pdisp_6rotp_r2.sh