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Introduction to Tropical Meteorology, 2nd Edition: Chapter 7: Synoptic and Mesoscale Systems
In this chapter, we examine the wide-variety of synoptic and mesoscale weather systems that affect the tropics, including, tropical easterly waves, upper tropospheric troughs, monsoon depressions, subtropical cyclones, westerly wind bursts, and cold fronts. Extratropical interactions, such as those caused by Rossby wave trains and the MJO, are examined. The chapter presents a review of thunderstorms and lightning. The structure, formation mechanisms, and impacts of mesoscale convective systems are examined. The distribution of lightning globally and within mesoscale systems is examined. Mesosc ...
Available online: https://www.meted.ucar.edu/training_module.php?id=1112
Published by: The University Corporation for Atmospheric Research ; 2014
In this chapter, we examine the wide-variety of synoptic and mesoscale weather systems that affect the tropics, including, tropical easterly waves, upper tropospheric troughs, monsoon depressions, subtropical cyclones, westerly wind bursts, and cold fronts. Extratropical interactions, such as those caused by Rossby wave trains and the MJO, are examined. The chapter presents a review of thunderstorms and lightning. The structure, formation mechanisms, and impacts of mesoscale convective systems are examined. The distribution of lightning globally and within mesoscale systems is examined. Mesoscale and local circulations, such as sea-breezes, are explored. The final section focuses on severe local storms such as tornadoes and waterspouts.
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WMO shall not be liable for any damages incurred as a result of the use of its website. Please do not misuse our website.Language(s): English
Format: Digital (Standard Copyright)Tags: Weather forecasting ; Thunderstorm ; Tropical meteorology ; Lesson/ Tutorial ; Satellite Skills and Knowledge for Operational Meteorologists
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The impacts of fog and thunderstorms on aircraft operations : a case study of Wilson Airport Nairobi Kenya
Abongnwi Ngwa Lumfuh - 2014Adverse weather is the main cause of the alterations to operations at Wilson airport. At Wilson airport, occurrence of fog and low ceiling, cross winds, thunderstorm and heavy rainfall are considered the main causes of adverse weather hampering the aircraft operations. The purpose of this study is to investigate the impacts of fog and thunderstorm on aircraft operations at Wilson airport. The impact is measured in terms of delay, diversion, cancelation and economic value of these actions. The data on fog and thunderstorm data was obtained from Kenya Meteorological Service (Climatological secti ...
The impacts of fog and thunderstorms on aircraft operations: a case study of Wilson Airport Nairobi Kenya
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Adverse weather is the main cause of the alterations to operations at Wilson airport. At Wilson airport, occurrence of fog and low ceiling, cross winds, thunderstorm and heavy rainfall are considered the main causes of adverse weather hampering the aircraft operations. The purpose of this study is to investigate the impacts of fog and thunderstorm on aircraft operations at Wilson airport. The impact is measured in terms of delay, diversion, cancelation and economic value of these actions. The data on fog and thunderstorm data was obtained from Kenya Meteorological Service (Climatological section). Data on delay and diversion was obtained from Kenya Civil Aviation Authority for period of ten years stretching from 2000 to 2009. This was achieved by studying the number of annual and monthly diversion and delay of aircraft due to either fog or thunderstorm occurrence. The results of this study show that DIVERSION was more than DELAY. The delays and diversions are prominent in the month of February and April of each year. The year that registered many of these instances was in 2008 with a highest record of 15 delays and diversions.
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Language(s): English
Format: Digital (Available online for logged-in users)Tags: Fog ; Thunderstorm ; Case/ Case study ; Kenya ; Thesis - WMO Fellowship Division
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Nowcasting for Aviation in Africa
Nowcasting for Aviation in Africa summarizes techniques and best practices for developing area-specific forecasts at very short (0-6 hour) timescales. This 1-hour lesson presents a case study focused on interpreting threats and communicating correct warning information for a weather event affecting multiple airports in Gauteng Province, South Africa. In completing the lesson, the learner will assess the state of the atmosphere, develop a nowcast, monitor conditions, and update/create appropriate nowcast products for aviation stakeholders.
Available online: https://www.meted.ucar.edu/training_module.php?id=1020
Published by: The University Corporation for Atmospheric Research ; 2013
Nowcasting for Aviation in Africa summarizes techniques and best practices for developing area-specific forecasts at very short (0-6 hour) timescales. This 1-hour lesson presents a case study focused on interpreting threats and communicating correct warning information for a weather event affecting multiple airports in Gauteng Province, South Africa. In completing the lesson, the learner will assess the state of the atmosphere, develop a nowcast, monitor conditions, and update/create appropriate nowcast products for aviation stakeholders.
Disclaimer regarding 3rd party resources: WMO endeavours to ensure, but cannot and does not guarantee the accuracy, accessibility, integrity and timeliness of the information available on its website. WMO may make changes to the content of this website at any time without notice.
The responsibility for opinions expressed in articles, publications, studies and other contributions rests solely with their authors, and their posting on this website does not constitute an endorsement by WMO of the opinion expressed therein.
WMO shall not be liable for any damages incurred as a result of the use of its website. Please do not misuse our website.Language(s): English
Format: Digital (Standard Copyright)Tags: Weather ; Satellite ; Numerical weather prediction ; Thunderstorm ; Hail ; Wind shear ; Lesson/ Tutorial
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Anticipating Hazardous Weather and Community Risk, 2nd Edition
Anticipating Hazardous Weather and Community Risk, 2nd Edition provides emergency managers and other decision makers with background information about weather, natural hazards, and preparedness. Additional topics include risk communication, human behavior, and effective warning partnerships, as well as a desktop exercise allowing the learner to practice the types of decisions required as hazardous situations unfold. This module offers web-based content designed to address topics covered in the multi-day Hazardous Weather and Flood Preparedness course offered by the Federal Emergency Management ...
Available online: https://www.meted.ucar.edu/training_module.php?id=890
Published by: The University Corporation for Atmospheric Research ; 2012
Anticipating Hazardous Weather and Community Risk, 2nd Edition provides emergency managers and other decision makers with background information about weather, natural hazards, and preparedness. Additional topics include risk communication, human behavior, and effective warning partnerships, as well as a desktop exercise allowing the learner to practice the types of decisions required as hazardous situations unfold. This module offers web-based content designed to address topics covered in the multi-day Hazardous Weather and Flood Preparedness course offered by the Federal Emergency Management Agency (FEMA) and the National Weather Service (NWS). The module also complements other onsite courses by those agencies and provides useful information for evaluating and preparing for threats from a range of weather and natural hazards.
Disclaimer regarding 3rd party resources: WMO endeavours to ensure, but cannot and does not guarantee the accuracy, accessibility, integrity and timeliness of the information available on its website. WMO may make changes to the content of this website at any time without notice.
The responsibility for opinions expressed in articles, publications, studies and other contributions rests solely with their authors, and their posting on this website does not constitute an endorsement by WMO of the opinion expressed therein.
WMO shall not be liable for any damages incurred as a result of the use of its website. Please do not misuse our website.Language(s): English
Format: Digital (Standard Copyright)Tags: Weather ; Meteorology ; Flood ; Hurricane ; Tsunami ; Tornado ; Thunderstorm ; Media ; Lesson/ Tutorial
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Thunder Events in China: 1980-2008
Using data collected at 517 weather stations in contiguous China over the period 1980-2008, characteristics of thunder events have been investigated. These characteristics include geographical distribution, interdecadal variation, annual variation, and seasonal variation. The areas with the highest frequencies of thunder events are located in the central Tibetan Plateau, Yunnan, Guangxi, and Guangdong. The annual number of thunder days increases from northern to southern China. But the frequency of thunder events over mountains and plateaus is much higher than the frequency of events over plai ...
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Available online: http://www.iapjournals.ac.cn/aosl/ch/reader/view_abstract.aspx?file_no=AOSL10027
in Atmospheric and Oceanic Science Letters > Volume 3 Number 4 (16 July 2010) . - p.181-188Using data collected at 517 weather stations in contiguous China over the period 1980-2008, characteristics of thunder events have been investigated. These characteristics include geographical distribution, interdecadal variation, annual variation, and seasonal variation. The areas with the highest frequencies of thunder events are located in the central Tibetan Plateau, Yunnan, Guangxi, and Guangdong. The annual number of thunder days increases from northern to southern China. But the frequency of thunder events over mountains and plateaus is much higher than the frequency of events over plains in the same latitude. The interdecadal variation of events shows that the frequency of thunder occurrences was highest during the 1980s, decreased during the 1990s, and increased slightly afterwards. Thunder occurrences vary with the season, northward in May and retreating southward in September.
Language(s): English
Format: Digital (Free), Hard copyTags: China ; History ; Thunderstorm ; Weather
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Volume 3 Number 4 - 16 July 2010
is an issue of Atmospheric and Oceanic Science Letters. Science Press, 2010
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S-290 Unit 7: Wind Systems
S-290 Unit 7: Wind Systems outlines general and local winds and their processes. Detailed information is provided about critical fire weather winds, including frontal winds, foehn winds, and thunderstorm winds and the effects of these winds on wildland fires. The module also describes topographic influences on winds, and provides guidelines for estimating winds based on location and fuel sheltering. The module is part of the Intermediate Wildland Fire Behavior Course.
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Principles of Convection III: Shear and Convective Storms
This module discusses the role of wind shear in the structure and evolution of convective storms. Using the concept of horizontal vorticity, the module demonstrates how shear enhances uplift, leading to longer-lived supercell and multicell storms. The module also explores the role of shear in the development of mesoscale convective systems, including bow echoes and squall lines. Most of the material in this module previously appeared in the COMET modules developed with Dr. Morris Weisman. This version includes a concise summary for quick reference and a final exam to test your knowledge. The m ...
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World distribution of thunderstorm days, part 2 : tables of marine data and world maps = Répartition mondiale des jours d'orage, 2e partie: tableau des données maritimes et cartes mondiales
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World distribution of thunderstorm days, part 1 : tables = Répartition mondiale des jours d'orage, 1re partie: tableau
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World distribution of thunderstorm days, part 1: tables, supplement N°1 = Répartition mondiale des jours d'orage, 1re partie: tableau supplément N°1
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