<Tr> <Td> Betalongchhip </Td> <Td> Tripura </Td> <Td> Jampui Hills </Td> <Td> 930 </Td> <Td> 3,051 </Td> <Td> 23 ° 48 ′ 36" N 92 ° 15 ′ 40" E ﻿ / ﻿ 23.810 ° N 92.261 ° E ﻿ / 23.810; 92.261 </Td> </Tr> <P> Tributaries of the Brahmaputra River in Northeast India: </P> <Ul> <Li> Beki River </Li> <Li> Bhogdoi River </Li> <Li> Dhansiri River </Li> <Li> Dibang River </Li> <Li> Dihing River </Li> <Li> Kameng River </Li> <Li> Kolong </Li> <Li> Kopili River </Li> <Li> Lohit River </Li> <Li> Manas River </Li> <Li> Sankosh River </Li> <Li> Subansiri River </Li> <Li> Teesta River </Li> </Ul> <P> Northeast India has a subtropical climate that is influenced by its relief and influences from the southwest and northeast monsoons . The Himalayas to the north, the Meghalaya plateau to the south and the hills of Nagaland, Mizoram and Manipur to the east influences the climate . Since monsoon winds originating from the Bay of Bengal move northeast, these mountains force the moist winds upwards, causing them to cool adiabatically and condense into clouds, releasing heavy precipitation on these slopes . It is the rainiest region in the country, with many places receiving an average annual precipitation of 2,000 mm (79 in), which is mostly concentrated in summer during the monsoon season . Cherrapunji, located on the Meghalaya plateau is one of the rainiest place in the world with an annual precipitation of 11,777 mm (463.7 in). Temperatures are moderate in the Brahmaputra and Barak valley river plains which decreases with altitude in the hilly areas . At the highest altitudes, there is permanent snow cover . </P>

Largest seven sister state of north east india