Cyclone

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 Do’s and Don’ts pertaining to Cyclone   
 
Gujarat has two storm seasons: May and June during the onset of the monsoon and October and November during the retreat of southwestern monsoon.
The estimated mean taluka basic wind speed (in m/sec) zonation for a 25-year return period is presented below which shows a maximum wind speed class between 34 to 39 m/sec along the western sea board of Saurashtra, which is exposed to the highest intensity of cyclonic and storm impact.
 
The estimated mean taluka basic wind speed (in m/sec) zonation for a 50-year return period is presented in below. This shows a maximum wind speed class of 45 to 47 class m/sec along the Saurashtra coast,specifically in Porbandar, Jamnagar and Junagadh districts, which are exposed to the highest intensity of cyclonic and storm impact.
 
The estimated mean taluka basic wind speed (in m/sec) zonation for a 100-year return period is presented in the figure below. This zonation would typically be used for a design of engineered and critical buildings and infrastructure with a mean design service life of 100 years. This map shows a maximum wind speed class of <55 m/ sec along the Saurashtra coast, specifically in Porbandar, Jamnagar and Junagadh districts, which are exposed to the highest intensity of cyclonic and storm impact.
 
The estimated mean Taluka basic wind speed (in m/sec) zonation for a 200-year return period is presented which shows the bulk of Saurashtra and the western coastal Talukas of Kachchh fall into the <55 m/sec class in this zonation. A narrow band of 51 to 55 m/sec and a more or less contiguous band of 48 to 50 m/sec and 45 to 47 m/sec cuts a swathe across Kachchh, Saurashtra and coastal South Gujarat.
 
 
  Important Links For Furthure Information
   
  India Meteorological Department, Government of India
  Meteorological Centre, Ahmedabad
  CSIR-National Institute of Oceanography, Goa
  National Disaster Management Authority, GoI
  GSDMA Leaflets In Gujarati

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