Wind speeds recorded in India during the Nor'wester 2013 Season.

 During the hot weather period i.e from March to May the eastern and North-eastern states of the subcontinent like West Bengal, Bihar, Assam, Orissa (parts) and Bangladesh experience dramatic appearance of a special type of violent thunderstorm know as Nor’wester. In Bengal it is known as ‘Kal Baisakhi’ or calamity of the month of Baisakh (April,15-May,15). Apart from its destructive effects like sudden rise in wind speed, lightning, thunder and hail the rainfall associated with the storm.

 For the occurrence of a nor’wester, the lower level moisture flow from the Bay of Bengal is essential. In the summer months the atmosphere becomes unstable due to intense insolation. On such days if there is a suitable synoptic situation such as a surface low pressure area over Jharkhand and adjoining districts of Gangetic West Bengal, the cyclonic vorticity reaching up to 1.5 kilometers above sea level with dry air aloft and presence of a jet stream between the levels 300 mb and 200 mb in the vicinity of Gangetic West Bengal are extremely helpful for the occurrence of nor’westers..

 Alipore is the king of Nor'wester in India in 2013

Min (50 km/hr) (From 1st April to 31st May, 2013)

1. Alipore, West Bengal - 116 km/hr on 17th April, 2013
2. Diamond Harbour, West Bengal - 116 km/hr on 17th April, 2013
3. Gaya, Bihar - 96 km/hr on 17th April, 2013
4. Tezpur, Assam - 93 km/hr on 3rd April, 2013
5. Guwahati, Assam - 80 km/hr on 14th April, 2013
6. Alipore, West Bengal - 76 km/hr on 12th May, 2013
7. Agartala, Tripura - 74 km/hr on 19th April, 2013
8. Bhubaneswar, Orissa - 72 km/hr on 26th May, 2013
9. Alipore, West Bengal - 72 km/hr on 19th May, 2013
10. Dum Dum, West Bengal - 68 km/hr on 17th April, 2013
11. Bankura, West Bengal - 65 km/hr on 19th May, 2013
12. Puri, Orissa - 64 km/hr on 21st April, 2013
13. Alipore, West Bengal - 63 km/hr on 11th April, 2013
14. Daltonganj, Jharkhand - 62 km/hr on 13th April, 2013
15. Dum Dum, West Bengal - 60 km/hr on 20th May, 2013
16. Alipore, West Bengal - 60 km/hr on 4th April, 2013
17. Alipore, West Bengal - 60 km/hr on 17th May, 2013
18. Patna, Bihar - 58 km/hr on 14th April, 2013
19. Paradeep, Orissa - 56 km/hr on 26th May, 2013 
20. Dum Dum, West Bengal - 56 km/hr on 17th May, 2013
21. Chandbali, Orissa - 56 km/hr on 7th May, 2013
22. Daltonganj, Jharkhand - 56 km/hr on 14th April, 2013
23. Daltonganj, Jharkhand - 56 km/hr on 2nd April, 2013
24. Alipore, West Bengal - 56 km/hr on 21st April, 2013
25. Alipore, West Bengal - 56 km/hr on 15th April, 2013
26. Chandbali, Orissa - 56 km/hr on 15th April, 2013
27. Digha, West Bengal - 55 km/hr on 19th April, 2013
28. Dum Dum, West Bengal - 52 km/hr on 19th May, 2013
29. Malda, West Bengal - 50 km/hr on 17th May, 2013