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Deep Depression BOB 04 (2007)

Tropical Storm (SSHS)
Deep Depression BOB 04 on June 29
Formed	June 28, 2007
Dissipated	June 30, 2007
Highest winds	95 km/h (60 mph) (1-minute sustained)
Lowest pressure	989 hPa (mbar)
Fatalities	57
Damage	Unknown
Areas affected	India, Pakistan
Part of the 2007 North Indian cyclone season

Deep Depression BOB 04 was a moderate tropical storm in the SSHS. It affected India and Pakistan in June of 2007.

[edit] Storm History

On June 28, an area of disturbed weather in the Bay of Bengal that had persisted as a well-marked low pressure area for two days became more organised.^[1] The India Meteorological Department (IMD) noted the formation of a depression around 0000 UTC (5:30 a.m. IST) southeast of Puri, Orissa, India. The IMD also stated that the system intensified into a deep depression three hours later whilst remaining "practically stationary".^[2] The Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert shortly after, noting that observations from the eastern coast of India had recorded falls in pressure corresponding with the system's development. Furthermore, an upper-level anticyclone had formed over the disturbance, which would maintain the favourable wind shear conditions.^[3] The JTWC initiated advisories later that day,^[4] as the depression moved northwest towards the Orissa coast.^[5] The depression made landfall near Puri early on June 29.^[6] The JTWC then issued its last advisory later that day, as the system moved inland.^[7] Early on June 30, with the system centred over Madhya Pradesh and Chhattisgarh, the IMD downgraded the system to a depression,^[8] and discontinued advisories 6 hours later.^[9]

At 0600 UTC (11 a.m. PST) on June 28, the Pakistan Meteorological Department (PMD) issued its first advisory regarding the remnants of the system. The PMD stated that the remnants "had the potential" to cause widespread heavy rain with strong winds in Sindh, Balochistan, Azad Kashmir and North-West Frontier provinces. This could worsen conditions in areas already flooded by Tropical Cyclone Yemyin. ^[10] In its fourth advisory on July 1, the PMD warned about the "high probability" of the system moving westward towards southern Sindh (instead of northwestward as previously projected), and regenerating over the Arabian Sea.^[11] The remnants of Tropical Cyclone 04B were mentioned in a Significant Tropical Weather Advisory from the JTWC early on July 2. After crossing the Deccan Plateau, convection was southwest of the centre, in the Arabian Sea, while multiple associated low-level circulation centres had yet to re-emerge, and were located in west-central India, north-northeast of Mumbai. The area had favourable upper-level divergence, but high vertical wind shear.^[12] Eventually, the circulation centre became fully exposed in unfavourable conditions, and the JTWC declared it "no longer suspect for development" later that day.^[13]

While it was over western India adjoining the Arabian Sea, the deep convection associated with the remnants of the cyclone brought heavy rains to Maharashtra, causing disruptions in transport due to floods and high winds in Mumbai. Amravati district, northeast of Mumbai, was also severely affected by floods.^[14] At least 43 people were killed in the state, and in Mumbai 243 mm (9.6 in) of rain was recorded.^[15] 14 died in Gujarat state, and evacuations were conducted. Up to 462 mm (18.1 inches) of rain was received in Bharuch district.^[16]

[edit] Impact

The storm hit India and Pakistan and killed 57 people.

[edit] References