Sting jets in intense winter North-Atlantic windstorms

Extratropical cyclones dominate autumn and winter weather over western Europe. The strongest cyclones, often termed windstorms, have a large socio-economic impact due to the strong surface winds and associated storm surges in coastal areas. Here we show that sting jets are a common feature of windstorms; up to a third of the 100 most intense North-Atlantic winter windstorms over the last two decades satisfy conditions for sting jets. The sting jet is a mesoscale descending airstream that can cause strong near-surface winds in the dry slot of the cyclone, a region not usually associated with strong winds. Despite their localized transient nature, these sting jets can cause significant damage, a prominent example being the storm that devastated southeast England on 16 October 1987. We present the first regional climatology of windstorms with sting jets. Previously analysed sting-jet cases appear to have been exceptional in their track over northwest Europe rather than in their strength.

[1]  N. Phillips,et al.  NUMERICAL INTEGRATION OF THE QUASI-GEOSTROPHIC EQUATIONS FOR BAROTROPIC AND SIMPLE BAROCLINIC FLOWS , 1953 .

[2]  Akio Arakawa,et al.  Computational Design of the Basic Dynamical Processes of the UCLA General Circulation Model , 1977 .

[3]  D. Durran,et al.  On the Effects of Moisture on the Brunt-Väisälä Frequency. , 1982 .

[4]  M. Shapiro,et al.  Fronts, Jet Streams and the Tropopause , 1990 .

[5]  P. Rowntree,et al.  A Mass Flux Convection Scheme with Representation of Cloud Ensemble Characteristics and Stability-Dependent Closure , 1990 .

[6]  G. Shutts.  SCAPE Charts from Numerical Weather Prediction Model Fields , 1990 .

[7]  W. Newton,et al.  Extratropical Cyclones: The Erik Palmén Memorial Volume , 1990 .

[8]  T. Warner,et al.  Model Generation of Spurious Gravity Waves due to Inconsistency of the Vertical and Horizontal Resolution , 1991 .

[9]  A. Thorpe.  Extratropical cyclones. The Erik Palmén Memorial Volume. Edited by Chester Newton and Eero O. Holopainen. American Meteorological Society. Pp. 272. Price $60 , 1991 .

[10]  T. Warner,et al.  Nonlinear hydrostatic conditional symmetric instability: implications for numerical weather prediction , 1993 .

[11]  Kevin I. Hodges,et al.  A General Method for Tracking Analysis and Its Application to Meteorological Data , 1994 .

[12]  Kevin I. Hodges,et al.  Feature Tracking on the Unit Sphere , 1995 .

[13]  A. Slingo,et al.  Studies with a flexible new radiation code. I: Choosing a configuration for a large-scale model , 1996 .

[14]  Heini Wernli,et al.  A Lagrangian‐based analysis of extratropical cyclones. I: The method and some applications , 1997 .

[15]  Damian R. Wilson,et al.  A microphysically based precipitation scheme for the UK meteorological office unified model , 1999 .

[16]  Kevin I. Hodges,et al.  Adaptive Constraints for Feature Tracking , 1999 .

[17]  G. Martin,et al.  A New Boundary Layer Mixing Scheme. Part I: Scheme Description and Single-Column Model Tests , 2000 .

[18]  G. Vaughan.  The UK MST radar , 2002 .

[19]  B. Hoskins,et al.  New perspectives on the Northern Hemisphere winter storm tracks , 2002 .

[20]  K. Browning.  The sting at the end of the tail: Damaging winds associated with extratropical cyclones , 2004 .

[21]  Evidence from Meteosat imagery of the interaction of sting jets with the boundary layer , 2004 .

[22]  A. Staniforth,et al.  A new dynamical core for the Met Office's global and regional modelling of the atmosphere , 2005 .

[23]  Peter Clark,et al.  The sting at the end of the tail: Model diagnostics of fine‐scale three‐dimensional structure of the cloud head , 2005 .

[24]  C. Baker.  Wind engineering—Past, present and future , 2007 .

[25]  Wind profiler observations of a sting jet , 2009 .

[26]  U. Ulbrich,et al.  Extra-tropical cyclones in the present and future climate: a review , 2009 .

[27]  Sting jets in severe northern European wind storms: a case study of Windstorm Gudrun , 2009 .

[28]  G. Vaughan,et al.  A climatology of mid‐tropospheric mesoscale strong wind events as observed by the MST radar, Aberystwyth , 2010 .

[29]  Kevin I. Hodges,et al.  Can Climate Models Capture the Structure of Extratropical Cyclones , 2010 .

[30]  S. Gray,et al.  Sting Jets in Simulations of a Real Cyclone by Two Mesoscale Models , 2010 .

[31]  J. Thepaut,et al.  The ERA‐Interim reanalysis: configuration and performance of the data assimilation system , 2011 .

[32]  Peter Clark,et al.  Conditional symmetric instability in sting‐jet storms , 2011 .

[33]  J. Kok,et al.  The physics of wind-blown sand and dust , 2012, Reports on progress in physics. Physical Society.