Tropical waves govern Monsoon intra seasonal oscillations across the globe. In this MJO plays a very key role modulating the strength of the monsoon. Additionally MJO along with ER many a times is the trigger for cyclogenesis during post monsoon periods. Over the past few months there has been a battle royale between MJO and…
Author: Chennaiyil Oru Mazhaikkaalam
Monsoon remains weak awaits the arrival of MJO trigger
Southwest Monsoon over the past few days has been weak with thunderstorms dominating most parts of the Indian sub continent. The daily rainfall chart while not indicating a classic “Break in Monsoon” period does show below average rainfall status. On the other hand the daily rainfall chart for TN & PDC has saw 11th straight…
Peninsular India to remain under thunderstorm activity
Over the past few days parts of Peninsular India, particularly Tamil Nadu, has been seeing fairly widespread thunderstorms. As the monsoon trough became less prominent and moved closer to Himalayas westerlies weakened over Peninsular India. This opened a window of opportunity for thunderstorms over the leeward plains of TN. Though Chennai may feel disappointed with…
Active phase of Convective Thunderstorms likely over interior TN
The last few days have seen the return of convective thunderstorms over the leeward areas of Tamil Nadu. With monsoon winds slowing down over Peninsular India it has allowed a period of enhanced convective thunderstorms along the East Coast. This Southwest Monsoon season has seen active phases of convective thunderstorms on a regular basis. The…
Veppasalanam Thunderstorms to continue over Tamil Nadu
It was possibly Dr. Ramanan the retired Director Area Cyclone Warning Centre, Chennai who popularised the word Veppasalanam. Many may not know the RMC Chennai had published a comprehensive glossary of Tamil Weather Terms a few years back. While Veppasalanam in basic sense indicates convective development often the role of wind is downplayed. As mentioned…