The International Journal of Meteorology
Total Page:16
File Type:pdf, Size:1020Kb
The International Journal of Meteorology www.ijmet.org Volume 36, number 359 April/May 2011 Hailstorm Damage Survey Results, UK Solar Irradiation and Temperatures in Botswana TORRO Tornado and Thunderstorm Reports © THE INTERNATIONAL JOURNAL OF METEOROLOGY To advertise on these pages email Advertising Manager, April/May 2011, Vol.36, No.359 73 Paul Messenger - [email protected] The International Journal of Meteorology Editor-in-chief: SAMANTHA J. A. HALL (B. A. Hons) [email protected] International Editorial Board April/May 2011, Vol. 36, No. 359 Dr. NICHOLAS L. BETTS The Queen’s University of Belfast, UK Prof. GRAEME D. BUCHAN Lincoln University, NZ CONTENTS Prof. TIMOTHY P. BURT University of Durham, UK Dr. ROBERT A. CROWDER (Formerly) Lincoln College, The ‘Ottery St Mary’ Hailstorm of 30 October 2008: Damage NZ Dr. ROBERT K. DOE (Formerly) Survey Results and Eyewitness Accounts The University of Portsmouth, UK Prof. MATTHEW R. CLARK . 75 JEAN DESSENS Université Paul Sabatier, Fr Prof. DEREK ELSOM IJMet Photography . I-IV Oxford Brookes University, UK Prof. GREGORY FORBES (Formerly) Stochastic Characteristics of Solar Irradiation and Penn State University, USA Prof. H.M. Temperatures in Botswana: Arima Models HASANEAN Cairo University, Egypt Dr. J. PRAKASH, E. M. LUNGU and P. K. JAIN . 91 KIERAN HICKEY National University of Ireland, Galway, Ireland Mr. PAUL TORRO Tornado Division Report: June 2010 KNIGHTLEY Meteogroup, UK Dr. PAUL R. BROWN and G. TERENCE MEADEN. 102 LESZEK KOLENDOWICZ Adam Mickiewicz University of Poznań, Poland TORRO Thunderstorm Report for the British Isles: July 2010 Dr. TERENCE MEADEN Oxford BOB PRICHARD . 106 University, UK Dr. PAUL MESSENGER . University of Glamorgan, UK Dr. TEMI Book Review OLOGUNORISA Nasarawa State PETER ROGERS . 108 University, Nigeria Dr. ALLEN H. PERRY University College of Swansea, UK Prof. RICHARD E. PETERSON Texas Tech University, USA Prof. JOHN T. SNOW University of Oklahoma, USA Dr. GREG SPELLMAN University College Northampton, UK Dr. JOHN TYRRELL University College Cork, Ireland Dr. DENNIS A. WHEELER University of Sunderland, UK Photography: Editorial Assistants: Front cover and Rear: MATTHEW CLARK [email protected]; © Matthew Clark A selection of two PAUL DOMAILLE [email protected]; photographs with respect to the SANDRA SPILLANE [email protected] Damage Survey of the Ottery, St Mary Hailstorm, United Kingdom. Sub-Editor and Marketing Manager: NICOLA PARSONS [email protected] Inside Rear: © Pete Scott Photography Director: HOWARD KIRBY [email protected] Send your photos to Howard Kirby Assistant Photograph Editor: MATT DOBSON and why not do a Focus On... piece? Press and PR Consultant: ANDREW KELLY [email protected] © THE INTERNATIONAL JOURNAL OF METEOROLOGY © THE INTERNATIONAL JOURNAL OF METEOROLOGY 74 April/May 2011, Vol.36, No.359 April/May 2011, Vol.36, No.359 75 THE INTERNATIONAL JOURNAL OF METEOROLOGY THE ‘OTTERY ST MARY’ HAILSTORM OF Published in association with The Tornado and Storm Research Organisation (TORRO) 30 OCTOBER 2008: DAMAGE SURVEY RESULTS a privately supported research body, serving the international public interest AND EYEWITNESS ACCOUNTS www.ijmet.org is sponsored by Simply Mail Solutions By MATTHEW R. CLARK www.simplymailsolutions.com TORRO; IJMet Feature Writer, IJMet, 20 Massey Avenue, Lymm, Cheshire, WA13 0PJ, U.K. Editor-in-chief: Samantha J. A. Hall, International Editorial Office, 20 Massey Avenue, Lymm, Cheshire, WA13 0PJ, United Kingdom ([email protected]) [email protected] / [email protected] Incident: Excessive Hailstorm NOTES AND GUIDELINES FOR SUBMISSION Incident Location: Ottery St Mary, UK Investigated by: Matthew Clark Research papers, letters, books and scientific reports for review, news items, conference information, Date of Incident: 30-31 October 2008 advertising and other communications on all aspects of meteorology are to be addressed to the Date of Investigation: 1 November 2008 appropriate member of staff and the Editor in the first instance. Authors should send their contributions initially by email to [email protected]. On some occasions Figures/Photos will be requested by CD. Abstract: During the early morning of 30 October 2008 an intense local storm produced significant This speeds up processing and correspondence, and allows for efficient minor editing and agreed flash flooding and large accumulations of hail within a small part of East Devon. This damage was major editing. Contributions should be prepared in 9pt arial font on MS Word (clear all styles), language documented by way of several surveys undertaken between 12 hours and 10 days after the storm. UK English. Every paper must commence with a short abstract summarising its significant and Further information was available in the form of eyewitness accounts, which were kindly offered by original content and contain full contact details. Keywords relevant to the paper are also appreciated. local residents following an appeal for information. The worst flood damage occurred within a 5 km References should be referred to in the text by the author’s name and year of publication, e.g. swathe along the lower western slopes of the Otter Valley between Fairmile in the north and Metcombe Browning et al. (1995). Responsibility for opinions expressed in articles rests with the authors who in the south, including western parts of the town of Ottery St Mary. Transportation and deposition of hail should obtain copyright permission where necessary. Please note that page charges may have to be by floodwaters resulted in deep deposits of hail in places, most notably on the west side of Ottery St imposed for some articles containing special artwork, complex equations, or numerous photographs, Mary. Some of these deposits exceeded 1 metre in depth and persisted for more than a week after the diagrams or maps. Authors must consult recent issues of the journal as a guide to the layout of papers. storm. Using a combination of eyewitness information and measurements of residual, un-drifted lying All figures, diagrams, photos, etc must be supplied as independent graphic files separate to each other hail depths made during the damage surveys, a map of estimated maximum level hail depths over the and from the text file with no embedded captions. An example article can be found at http://www.ijmet. worst affected area is constructed. Maximum level hail depths of 20 – 25 cm occurred within an area org/Contributions.htm. All contributors receive a free copy of the Journal their work features and colour of less than 1 km2, centred on the west side of the Otter Valley between West Hill and Ottery St Mary. versions can be viewed and downloaded from http://www.ijmet.org/online/ after online subscription. Hail depths of 2 – 5 cm or more occurred within a larger, though still narrow, southwest – northeast All figures require numbered captions and the captions are to be collected in sequence at orientated swathe of maximum width ~5 km. The distribution of hail depths appears to correspond well the end of the paper. Each table should be numbered and bear a title - please ensure your tables have to the spatial distribution of precipitation totals as inferred from radar data. correctly positioned lines, are no wider than 130mm, and avoid using Excel if possible. Photographs should be emailed to our Photography Director [email protected] as digital originals where possible or Keywords: hailstorm, flash flood, TORRO, damage survey, Devon. as high resolution .jpg or .tiff files digitised to at least 300 dpi. Please include as much detail as possible about the photograph(s) for inclusion in the Journal and supply contact details. INTRODUCTION Back issues may be purchased singly or as complete volumes. Some issues are now out of print but digital issues can be obtained online - http://www.ijmet.org/online/. IJMet Online is separate Between 0000 and 0300 UTC on 30 October 2008 intense, localised thunderstorms to the print subscription and includes current and past volumes that can be viewed and downloaded as occurred over a small part of East Devon. Flash flooding caused extensive damage to part of your IJMet Online subscription. Individual articles are also available for purchase to view and property, highways and farmland within a highly localised area centred close to the town of download online. Online advantages include: full colour, instant access, and two extra issues per year. Ottery St Mary. Deep accumulations of hail occurred which apparently augmented flooding by preventing the free drainage of water. Around 200 mm of precipitation is estimated to Please note that for universal citation purposes the recommended abbreviation for The Journal of have fallen within three hours (Grahame et al., 2009). The meteorological factors leading Meteorology (ISSN 0307-5966) was J. Meteorology, UK. The recommended abbreviation for The to this exceptional storm have been investigated by Clark (2011). To summarise, the storm International Journal of Meteorology (ISSN 1748-2992) is Int. J. Meteorology, UK. occurred along the rear edge of an occlusion which moved southeast and then became slow The International Journal of Meteorology is a non-profit making research periodical. Donations moving over southwest England. During this period an upper level cold pool approached the and bequests are always gratefully welcomed and go towards expanding the publication and area, resulting in steepening lapse rates and increased instability. Convection initiated along supporting valuable research and awards in the field of severe