STH Stormwatch :A tale of two cylones - in May2023.

STH has been tracking and reporting on storms for more than a decade even though now we report largely on a What'sApp group called 'Hazard Alerts'.
In May2023, the very quiet seas in the Bay of Bengal and eastern Pacific suddenly became active and brewed several big storms.
Cyclone 'Mocha' which formed in the Bay of Bengal around 08May2023 and we tracked and reported on the storm extensively:-

As I write Typhoon 'MAWAR' has formed in the eastern Pacific but is likely to weaken from a Super Typhoon to a severe tropical storm as is nears land.

Praful Rao
Kalimpong district
Darjeeling - Sikkim Himalaya
savethehills@gmail.com
9475033744

STH Stormwatch (24Oct2016) : Storm in bay intensifies into a DEEP depression

Update 1 (25Oct2016) :- Cyclone 'Kyant is born

This is the second cyclone in the Bay in 2016 after Cyclone 'Roanu'

Praful Rao,
Kalimpong
Dist Darjeeling

STH Stormwatch (15Jul2013) - Reporting a low pressure area in the Bay of Bengal

How are low pressure systems classified in India? What are the differences between low, depression and cyclone?

A low pressure system over Indian region is classified based on the maximum sustained winds speed associated with the system and the pressure deficit/ number of closed isobars associated with the system. The pressure criteria is used, when the system is over land and wind criteria is used, when the system is over the sea. The system is called as low if there is one closed isobar in the interval of 2 hPa. It is called depression, if there are two closed isobars, a deep depression, if there are three closed isobars and cyclonic storm if there are four or more closed isobars.
Considering wind criteria, the system with wind speed of 31 -50 kmph is called as depression and the low pressure system with maximum sustained 3 minutes surface winds between 51–59 kmph is called a deep depression. The system with maximum sustained 3 minutes surface winds of 63 knots or more is called as cyclonic storm

System	Associated wind speed Kmph
Low pressure area	32
Depression	32–50
Deep Depression	51–59
Cyclonic Storm	60-90
Severe Cyclonic Storm (SCS)	90-119
Very Severe Cyclonic Storm	119-220
Super Cyclonic Storm	Excess of 220

Source

Praful Rao,
Kalimpong,
Dist Darjeeling

STH stormwatch : The Gathering Storm

Chasing a storm on the Internet

More PowerPoint presentations from praful rao