Cyclone Akash

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale

Map key

Saffir–Simpson scale

  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown

Storm type

Tropical cyclone

Subtropical cyclone

Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

Image of Tropical Cyclone 01B (Akash) right after formation.

During the second week of May, low pressures persisted across the Bay of Bengal. An area of convection developed on May 11, and the next day the India Meteorological Department (IMD) classified it as a depression.[1] The system drifted northward,[2] and initially moderate wind shear kept the deep convection on the periphery of the consolidating low-level circulation center.[3] Gradually, banding features developed along the eastern semicircle, and with decreasing amounts of wind shear the system organized further.[4] By May 13, the pressure had dropped to 1000 mbar as wind shear levels dropped significantly. An anticyclone developed over the system, while a mid-latitude trough over northeastern India provided favorable outflow. Convection continued to consolidate around the low-level circulation,[5] and with well-defined banding features and a central dense overcast over the center of circulation, the Joint Typhoon Warning Center (JTWC) upgraded it to Tropical Cyclone 01B at 1121 UTC on May 13 while located about 545 km (339 mi) west-northwest of Yangon, Burma.[6]

Upon first being upgraded, the storm tracked steadily northward due to a break in a mid-level ridge.[6] Early on May 14, IMD upgraded the system to deep depression status,[7] and six hours later classified it as Cyclonic Storm Akash after attaining 3-min sustained winds of 40 mph (65 km/h).[8] Akash continued to organize, with deep convection wrapping fully around the low-level circulation.[9] An eye began to form as the storm approached land, and at 1800 UTC on May 14 JTWC estimated 1-min sustained winds of 120 km/h (75 mph).[10] Officially, Akash attained peak 3-min sustained winds of 85 km/h (55 mph) and a minimum central pressure of 988 hPa.[11] Additionally, meteorologists in Burma estimated Akash peaked with winds of 160 km/h (100 mph).[12] As it interacted with the mid-latitude westerlies, it began to become extratropical.[10] Shortly after reaching peak winds, Akash made landfall about 115 km (71 mi) south of Chittagong. The storm weakened rapidly as it continued inland,[13] and early on May 15 IMD issued its final advisory on the system;[14] shortly thereafter, JTWC discontinued advisories.[13] The name was contributed by India, Akash means Sky in Hindi language.

In its daily tropical weather outlook, the India Meteorological Department warned fishermen on the Andaman and Nicobar Islands to not go into the ocean due to the anticipated rough seas.[2] Upon approaching the coast of Bangladesh, officials canceled all flights to and from the Shah Amanat International Airport. Additionally, authorities at the port of Chittagong worked to protect cargo ships from the storm,[15] and it was ultimately closed for a period of 19 hours.[16][17] In preparation for Akash, officials advised coastal residents to evacuate further inland;[15] about 80,000 total residents left for emergency shelters.[16] About 40,000 Red Cross volunteers were prepared to aid those potentially affected.[15]

The India Meteorological Department estimated winds of 45–55 km/h (28–34 mph) affected the Andaman and Nicobar Islands, though no land reports were received.[2] In Sittwe in Burma, the storm produced a storm tide of 3 m (9.8 ft), which flooded coastal areas.[12]

In Chittagong, about 115 km (71 mi) north of where Akash moved ashore, surface stations reported peak winds of 37 km/h (23 mph) and a pressure of 996.8 hPa.[13] Near its landfall location, Akash produced high tides that flooded coastal areas with up to 1.5 m (4.9 ft) of water,[16] destroying at least 30 businesses.[12] The cyclone destroyed 205 houses and left an additional 845 damaged.[27] Akash caused moderate crop damage near the coast,[12] including 2 hectares (4.9 acres) of destroyed lands of shrimp farms.[17] Heavy precipitation was reported, with one station reporting a total of 53 mm (2.1 in);[27] the rainfall caused flooding in inland areas.[16] The heavy rains, caused by outer bands of the cyclone before it made landfall, limited play in Chittagong in the third One Day International cricket match between India and Bangladesh, before the match was abandoned.[28] Strong winds caused power outages throughout Cox's Bazar District,[16] and downed about 200 trees on St. Martin's Island. The cyclone left a total of 10 boats unaccounted for, with about 50 fishermen missing. In total, three fisherman were confirmed killed, all on St. Martin's Island,[17] with two people left hospitalized.[29] The passage of Cyclone Akash left many people homeless. Initially there was no response from the government.[29] In all, 14 people were killed by Akash and damages amounted to US$982 million.[30]

• List of tropical cyclone records
• Cyclone Mora

• Joint Typhoon Warning Center Archived 2010-03-01 at the Wayback Machine