General Weather Situation over the Lower Mekong Basin (LMB)
23 June 2013
General Condition:
On June 23 2013 at 01.00 am Local Cambodia Time (LCT), the latitude from 00N to 280N and the
longitude from 900E to 1250E, the Tropical Storm (TS) “BEBINCA” over the Bay of Tonkin,
about 300 Kilometers East of Hanoi, Vietnam or latitude 19.00N and longitude 108.0 0E with
maximum sustained wind near the center about 65 km/hr. The TS is moving west-northwestward
about 18 km/h (Figure 1).
During June 23-25, the Tropical Storm (TS) “BEBINCA” will move to the South China and
expected to make landfall over Nanning, China on 24 June. Scattered rain showers with isolated
heavy rain will be likely in some areas in the South of Myanmar, Thailand and Cambodia while
heavy rain ad very heavy rain fall with gust will be most likely in many areas in the North of Lao
PDR and Viet Nam. The strong wind waves are expected about 2.0-3.0 meters high in the
Andaman Sea and about 1.0- 2.0 meters high in the upper Gulf of Thailand.
Figure 1: Weather Chart issued at 18:00 UTC on 22 June, 2013
Source: Thai Meteorological Department
Figure 2 of June 23 2013 at 06:00 am Local Cambodia Time (LCT) shows IR image which is
observed cloudy with cloud bans and cloud bans with the form of Cirrostratus (Cs), Altostratus
(As), Altocumulus (Ac) and Stratocumulus (Sc) and Cumulonimbus (Cb) over the Andaman Sea,
the upper Gulf of Thailand, the Central, the North of Lao PDR and the Central of Viet Nam.
Figure 2: Infrared Image, MTSAT IR, at 23.00 UTC on June 22, 2013
Source: Japan Meteorological Agency
The trough lies across Myanmar, Thailand, Lao PDR, Cambodia and Viet Nam. The
Southwesterly wind prevails over Myanmar, Thailand and Indochina Peninsular at 01.00 am
(LTC) on 23 June, 2013(Figure 3).
Figure 3: Upper Air Weather Chart 850 hPa (1500 m), issued at 18:00 UTC on June 22 2013
Source: Thai Meteorological Department
The below show interactive weather forecast maps are produced from computer models on June
23, 2013.
During June 23-25 2013, rain will be likely in many areas in the South of Myanmar, the Central
the west and the East of Thailand, the Central and the North of Lao PDR and Viet Nam, the
North, the Northeast and the Southwest Coast of Cambodia (Figure 4)
Figure 4: The prognosticative maps issued at 12:00 UTC on June 22, 2013 for 72hrs forecast
Source: Hong Kong Observatory
Conclusion: Severe Weather Situation
The Tropical Storm (TS) “BEBINCA” over the Bay of Tonkin, about 300 Kilometers East of
Hanoi, Vietnam or latitude 19.00N and longitude 108.0 0E with maximum sustained wind near the
center about 65 km/hr. The TS is moving west-northwestward about 18 km/h. The trough of low
pressure system lies across Myanmar, Thailand, Lao PDR, Cambodia and Viet Nam at the height
of 1.5km (850 hPa).
On June 23-25 2013, the Tropical Storm (TS) “BEBINCA” will move to the South China and
expected to make landfall over Nanning, China on 24 June.
As the result of these phenomena, it will bring scattered rain showers with isolated heavy rain
will be likely in some areas of Myanmar, Thailand and Cambodia while heavy rain ad very
heavy rain fall with gust will be most likely in many areas in the North Lao PDR and Viet Nam
during 23-25 June 2013.
The strong wind waves are expected about 2.0-3.0 meters high in the Andaman Sea and about
1.0- 2.5 meters high in the upper Gulf of Thailand while the strong wind waves are expected
about 3.0-4.0 meters high in the upper northeast South China Sea during 23-24 June 2013.
Warning: People lives in the North of Lao PDR, the Central and the North of Viet Nam
beware of very heavy rain and gust. All ships in the Andaman Sea, the upper Gulf of Thailand
particularly in the upper Northeast South China Sea should take with caution during 23-24
June 2013.
Note: This bulletin is published by Department of Meteorology in collaboration with the
MRC’s Regional Flood Management and Mitigation Center, Phnom Penh City,
Cambodia.