Analysis of a severe weather event over Mecca, Kingdom of Saudi Arabia, using observations and high-resolution modelling

Handle URI:
http://hdl.handle.net/10754/625878
Title:
Analysis of a severe weather event over Mecca, Kingdom of Saudi Arabia, using observations and high-resolution modelling
Authors:
Dasari, Hari Prasad ( 0000-0003-0628-4481 ) ; Attada, Raju; Knio, Omar; Hoteit, Ibrahim ( 0000-0002-3751-4393 )
Abstract:
The dynamic and thermodynamic characteristics of a severe weather event that caused heavy wind and rainfall over Mecca, Kingdom of Saudi Arabia, on 11 September 2015 were investigated using available observations and the Weather Research and Forecasting model configured at 1 km resolution. Analysis of surface, upper air observations and model outputs reveals that the event was initiated by synoptic scale conditions that intensified by interaction with the local topography, triggering strong winds and high convective rainfall. The model predicted the observed characteristics of both rainfall and winds well, accurately predicting the maximum wind speed of 20–25 m s−1 that was sustained for about 2 h. A time series analysis of various atmospheric variables suggests a sudden fall in pressure, temperature and outgoing long wave radiation before the development of the storm, followed by a significant increase in wind speed, latent and moisture fluxes and change in wind direction during the mature stage of the storm. The model outputs suggest that the heavy rainfall was induced by a low-level moisture supply from the Red Sea combined with orographic lifting. Latent heat release from microphysical processes increased the vertical velocities in the mid-troposphere, further increasing the low-level convergence that strengthened the event.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Dasari HP, Attada R, Knio O, Hoteit I (2017) Analysis of a severe weather event over Mecca, Kingdom of Saudi Arabia, using observations and high-resolution modelling. Meteorological Applications 24: 612–627. Available: http://dx.doi.org/10.1002/met.1662.
Publisher:
Wiley-Blackwell
Journal:
Meteorological Applications
Issue Date:
10-Aug-2017
DOI:
10.1002/met.1662
Type:
Article
ISSN:
1350-4827
Sponsors:
This research work was supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia, and the Saudi ARAMCO-KAUST Marine Environmental Research Center (SAKMERC). This research made use of the Supercomputing Laboratory resources at KAUST.
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1002/met.1662/full
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorDasari, Hari Prasaden
dc.contributor.authorAttada, Rajuen
dc.contributor.authorKnio, Omaren
dc.contributor.authorHoteit, Ibrahimen
dc.date.accessioned2017-10-17T10:39:38Z-
dc.date.available2017-10-17T10:39:38Z-
dc.date.issued2017-08-10en
dc.identifier.citationDasari HP, Attada R, Knio O, Hoteit I (2017) Analysis of a severe weather event over Mecca, Kingdom of Saudi Arabia, using observations and high-resolution modelling. Meteorological Applications 24: 612–627. Available: http://dx.doi.org/10.1002/met.1662.en
dc.identifier.issn1350-4827en
dc.identifier.doi10.1002/met.1662en
dc.identifier.urihttp://hdl.handle.net/10754/625878-
dc.description.abstractThe dynamic and thermodynamic characteristics of a severe weather event that caused heavy wind and rainfall over Mecca, Kingdom of Saudi Arabia, on 11 September 2015 were investigated using available observations and the Weather Research and Forecasting model configured at 1 km resolution. Analysis of surface, upper air observations and model outputs reveals that the event was initiated by synoptic scale conditions that intensified by interaction with the local topography, triggering strong winds and high convective rainfall. The model predicted the observed characteristics of both rainfall and winds well, accurately predicting the maximum wind speed of 20–25 m s−1 that was sustained for about 2 h. A time series analysis of various atmospheric variables suggests a sudden fall in pressure, temperature and outgoing long wave radiation before the development of the storm, followed by a significant increase in wind speed, latent and moisture fluxes and change in wind direction during the mature stage of the storm. The model outputs suggest that the heavy rainfall was induced by a low-level moisture supply from the Red Sea combined with orographic lifting. Latent heat release from microphysical processes increased the vertical velocities in the mid-troposphere, further increasing the low-level convergence that strengthened the event.en
dc.description.sponsorshipThis research work was supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia, and the Saudi ARAMCO-KAUST Marine Environmental Research Center (SAKMERC). This research made use of the Supercomputing Laboratory resources at KAUST.en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/met.1662/fullen
dc.rightsThis is the peer reviewed version of the following article: Analysis of a severe weather event over Mecca, Kingdom of Saudi Arabia, using observations and high-resolution modelling, which has been published in final form at http://doi.org/10.1002/met.1662. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.en
dc.subjecthigh-resolution modelen
dc.subjectMecca regionen
dc.subjectorographyen
dc.subjectrainfallen
dc.subjectRed Sea moistureen
dc.subjectstormen
dc.subjectstrong windsen
dc.titleAnalysis of a severe weather event over Mecca, Kingdom of Saudi Arabia, using observations and high-resolution modellingen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalMeteorological Applicationsen
dc.eprint.versionPost-printen
kaust.authorDasari, Hari Prasaden
kaust.authorAttada, Rajuen
kaust.authorKnio, Omaren
kaust.authorHoteit, Ibrahimen
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