Tropical Cyclone Yaas intensified over the northern Bay of Bengal on Monday night. At 11:00 p.m. EDT on Monday the center of Tropical Cyclone Yaas was located at latitude 18.5°N and longitude 88.0°E which put it about 305 miles (495 km) south of Kolkata, India. Yaas was moving toward the north-northwest at 13 m.p.h. (20 km/h). The maximum sustained wind speed was 70 m.p.h. (110 km/h) and there were wind gusts to 85 m.p.h. (135 km/h). The minimum surface pressure was 975 mb.

Tropical Cyclone Yaas strengthened to almost the equivalent of a hurricane/typhoon south of Kokata on Monday night. The distribution of thunderstorms around Yaas remained asymmetrical. Most of the thunderstorms were occurring in bands in the western half of Tropical Cyclone Yaas. Bands in the eastern half of the circulation consisted primarily of showers and lower clouds. The inner end of a rainband wrapped around the western and southern sides of the center of Yaas. Storms near the center of circulation generated upper level divergence that pumped mass away to the west and north of the tropical cyclone. Winds to tropical storm force extended out 160 miles (260 km) from the center of circulation.

Tropical Cyclone Yaas will move through an environment favorable for intensification during the next 24 hours. Yaas will move over water where the Sea Surface Temperatures are near 30°C. It will move under the southwestern part of an upper level ridge over the Bay of Bengal. The ridge will produce easterly winds which will blow toward the top of the tropical cyclone. Those winds will cause some vertical wind shear, but the shear will not be enough to prevent intensification. Tropical Cyclone Yaas will strengthen to the equivalent of a hurricane/typhoon during the next 24 hours.

Tropical Cyclone Yaas will move around the western side of a high pressure system over Southeast Asia. The high will steer the tropical cyclone toward the north-northwest during the next 36 hours. On its anticipated track Yaas will make landfall on the coastline of Odisha southwest of Kolkata in 24 hours. Tropical Cyclone Yaas will be the equivalent of a hurricane/typhoon when it approaches the coast. Yaas is likely to bring damaging winds and locally heavy rain to the coastal regions of Odisha and West Bengal. Tropical Cyclone Yaas will cause a dangerous storm surge of up to 9 feet (3 meters) on parts of the coast around the northern Bay of Bengal.