Akira Sobajima (JMA) has provided a report on the Theoretical Basis for the Rapidly Developing Cumulus Areas Derivation Algorithm [pdf] that is used at JMA (also available on the Documentation page under Convective Initiation).
Author Archives: Patrik Johnsson
Description of NEFODINA
A description of the NEFODINA algorithm, provided by Davide Melfi, was added to the website. It can be found on the Documentation page under “Mature Storms” and here.
CWG Splinter Meeting (Sopot, Sept. 2012)
The Workshop met on 4 September 2012 at the EUMETSAT Conference in Sopot.
Here you can find the Meeting Minutes.
New version of Best Practice Document
A new version (30 July 2012) of the “living” Best Practice document has been prepared. Please download and comment on this document, authored by John Mecikalski, Kris Bedka and Marianne König.
Please take note of the methods they describe. The intention is that this document is a “living” document and you are strongly encouraged to add sections to it, describing alternative nowcasting methods. The “Best Practice document” and your contributions will be a topic in upcoming CWG meetings.
CWG Workshop (Prague, March 2012)
From 27 to 30 March 2012, the Working Group met in Prague for a workshop.
Here you can find the Workshop Minutes.
Presentations of the Workshop were arranged in several topic categories. Their files can be found here:
Testbed
- Pieter Groenemeijer, The ESSL Testbed [pdf].
Preconvective Conditions
- Estelle de Coning: Satellite based nowcasting products in the pre-convective phase for southern Africa [pdf].
- Takumu Egawa: Development of Instability Indices for Early Detection of Severe Weather Phenomena [pdf].
- Christo Georgiev: MPEF DIVergence product Interpretation scheme [ppt].
- Jochen Kerkmann: Understanding Convective Clouds through the eyes of Meteosat Second Generation [ppt].
- Marianne König: MSG Derived Instability Indices – Overview [pdf]
- Dan Lindsey and coauthors: GOES-R Risk Reduction Project: Predicting Convective Initiation 1-6 Hours Prior to Occurrence [pdf]
- Ralph Petersen and coauthors: Why do GEO-Satellite-based NearCasts? [pdf] and more examples [pdf].
- Jenni Rauhala: Pre-convective environment [pdf].
- José Miguel Fernández-Serdán: Improvements in the operational intranet web page for accessing MSG data and products [pdf].
Convective Initiation
- Takumu Egawa and Akira Sobajima: Detection of Rapidly Developing Cumulus Areas from MTSAT-1R Short-Time Interval Images [pdf].
- Wayne Feltz and coauthors: Development and Application of a Satellite-based Convective Cloud Object-Tracking Methodology [pdf].
- Steven Goodman: GOES-R Geostationary Lightning Mapper (GLM): Convective Initiation and Severe Storms [pdf].
- Sofia Kocsis and coauthors: Improvement of Convective Initiation Product for Meteosat Second Generation Satellites [ppt].
- Thomas Krennert: Basic Investigation of Symmetric Instability During Convective Initiation in the Alpine Region [ppsx].
- John R. Mecikalski: Geostationary Satellite-based Convective Initiation Nowcasting: Current Capabilities and Operational Aspects [pdf].
- Luca Nisi and coauthors: COALITION: merging Satellite, Radar, NWP and orographic information for predicting severe convection [pdf].
- Maria Putsay and coauthors: Meteosat-8 RSS Convection Initiation Product, Improvement and Radar Based Validation [ppt] [avi movie].
- Dennis Stich: CI Nowcasting at DLR – Snapshots of ongoing research [pdf].
Mature Storms
- Rachel Albrecht and coauthors: CHUVA Project: 2010-2011 and Perspectives for 2012-2014 [pptx].
- Kris Bedka and coauthors: Objective Detection of IR Temperature Minima within Convective Cloud Tops: Validation, Applications and Relevance to Nowcasting [ppt].
- Aydın Gürol Ertürk and Kris Bedka: Comparison of MSG Overshooting Top Detections and MSG “Storms” RGB Applications [ppt], movies: airmass-RGB [mpg], IR108 [mpg], HRV [mpg], OT [mpg], storm-RGB [mpg].
- Ján Kaňák: Time and space distribution of mature convection over Europe based on MSG Airmass product [pptx], movie: [avi].
- Ján Kaňák: Tool to estimate cloud top height based on sun illumination and cloud shadows [pptx], movie: [avi].
- O. Kryvobok and V. Balabuh: Combination of satellite data and instability indices for estimation of the storm severity [pptx].
- Cecilia Marcos and Antonio Rodriguez: Convective Rainfall Rate Algorithm Evolution [ppt].
- Petra Mikus and Nataša Strelec Mahović: What happens with the weather in the vicinity of the overshooting top? [ppt].
- Mária Putsay and coauthors: Simultaneous observation of above-anvil ice plume and plume-shaped BTD anomaly atop a convective storm [ppt], movie [avi].
- Daniel Rosenfeld: Satellite retrieved cloud microstructure providing insights and adds predictability to severe convective storms [pptx].
- Jose Serdan (for Ana Genovés): Nowcasting Severe Weather Experiment – 2011 NoSWEx [pdf].
- Martin Setvák, Kris Bedka and Dan Lindsey: BTD (WV – IR window) – informal comments and discussion [pdf].
- Inna Sobchenyuk: Possibility of a use of the “cold ring” indicator on stallite images in operational nowcasting/forecasting of severe weather [pdf].
Other topics
- Humberto Barbosa: Training Experiences from the South American Group of EUMETCast Operators (SAGEO) [pdf].
- Sung-Rae Chung: Rainfall Detection through COMS in KMA [pptx].
- Hartwig Deneke and coauthors: Contribution to DWD’s Hans Ertel Research Centre (HErZ): Object-based analysis and seamless prediction (OASE) [pdf]
- Jochen Grandell: Geostationary lightning monitoring with the Meteosat Third Generation Lightning Imager (MTG LI) [pptx], movie [avi], movie [youtube].
- Davide Melfi: Satellite Rainfall Estimation [pdf].
- Monika Pajek and Piotr Struzik: Long Data Series Analysis – Satellite Climatology of Thunderstorm – Poland Experiences [pdf].
- Caroline Forster and Arnold Tafferner (presented by Dennis Stich): Summer Campaigns at MUC [pdf].
Study on overshooting tops
Supported by the international training project EUMeTrain, Petra Mikus (DHMZ) performed a study on a satellite-based method to detect overshooting tops and its application for nowcasting. Her research was presented at the Convection Week, at the EUMETSAT conference and the ECSS conference.
You are encouraged to take note of this research in this PDF.
Welcome
Since the launch of the first Meteosat Second Generation (MSG) satellite in 2002, many of applications in the area of severe convective storm detection and nowcasting have been developed by various users. The focus of this working group is to establish a comprehensive inventory of the available applications in this field, with the aim to get deeper insight into the differences and commonalities of the available techniques and products, and their specific areas of application.
The Convection Working Group is an initiative of EUMETSAT and its member states, and the European Severe Storms Laboratory (ESSL).
Golden Case 2010
Storm outbreak – 15 August 2010
The storms that occurred on the 15th August 2010 in parts of central and eastern Europe were interesting from many aspects. Given their highly variable appearance and characteristics of these storms, this date was selected as the second CWG golden case, to be examined in detail, as well as used to test various convection-related algorithms.
Golden Case 2009
Severe Convection – 25 May 2009
A severe convective outbreak with big hail and thunderstorms occurred over parts of western and central Europe on Monday, May 25th 2009. Overnight, a strong squall-line developed that produced gusts in excess of 35 m/s across Northern France, Belgium and the Netherlands uprooting trees and causing considerable damage to property. In addition hail with diameter of 10 cm was recorded.