General Weather Situation over the Lower Mekong Basin (LMB)
16 June 2015
General Condition:
On June 16 2015 at 01.00 am Local Cambodia Time (LCT), the latitude from 00N to 280N and the
longitude from 900E to 1250E, the weak trough lies across Thailand, Lao PDR, Cambodia and
Viet Nam. The strong Southwest monsoon prevails over Andaman Sea, the Gulf of Thailand,
Thailand and Indochina Peninsular (Figure 1).
During June 16-18, the weak trough will lie across Thailand, Lao PDR, Cambodia and Viet Nam.
From moderated to heavy rain will be likely in more areas in Myanmar, Thailand, Cambodia, the
South and the Central of Lao PDR, the South, the upper South of Viet Nam during 16-18 June
2015.
The wind waves are expected about 1.0-2.5 meters high in the Andaman Sea and in the Gulf of
Thailand during 16-18 June 2015.
Figure 1: Weather Chart issued at 18:00 UTC on 15 June, 2015
Source: Thai Meteorological Department
Figure 2 of June 16 2014 at 07:00 am Local Cambodia Time (LCT) shows IR image which is
observed cloudy with the form of Cirrostratus (Cs), Altostratus (As), Altocumulus (Ac) and
Cumulonimbus (Cb) over the Andaman Sea, the Gulf of Thailand and the lower South China Sea.
Figure 2: Infrared Image, MTSAT IR, at 00.00 UTC on June 16, 2015
Source: Japan Meteorological Agency
The trough lies across Myanmar, Thailand, Lao PDR, Cambodia and Viet Nam. The Easterly
winds prevail over Myanmar, Thailand and Indochina Peninsular at 01.00 am (LTC) on 16 June,
2015(Figure3)
Figure 3: Upper Air Weather Chart 850 hPa (1500 m), issued at 18:00 UTC on 15 June 2015
Source: Thai Meteorological Department
The below show interactive weather forecast maps are produced from computer models on June,
16 2014.
During June 16-18 2015, rain will be likely in rain will be most likely in Myanmar, Thailand,
Cambodia, the South and the upper South of Lao PDR, the South and the upper South of Viet
Nam (Figure 4).
Figure 4: The prognosticative maps issued at 18:00 UTC on June15, 2015 for 72hrs forecast
Source: Hong Kong Observatory
Conclusion: Normal Weather Situation
The weak trough lies across Thailand, Lao PDR, Cambodia and Viet Nam. The strong Southwest
monsoon prevails over Andaman Sea, the Gulf of Thailand, Thailand and Indochina Peninsula at
the surface. The trough lies across Myanmar, Thailand and Indochina Peninsular at the height of
1.5km (850 hPa).
On June 16-18 2015, the weak trough will lie across Myanmar, Thailand, Lao PDR, Cambodia
and Viet Nam.
As the result of these phenomena, it will bring from moderated to heavy rain will be likely in
more areas in Myanmar, Thailand, Cambodia, the South and the Central of Lao PDR, the
South, the upper South of Viet Nam during 16-18 June 2015.
The wind waves are expected about 1.0-2.5 meters high in the Andaman Sea and in the Gulf of
Thailand during 16-18 June 2015.
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.