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  General Situation    at 16:00 April 11, 2021  
The moderate high-pressure system remains over upper Thailand and the South China Sea leading to the southerly and southeasterly winds prevailing across the lower North, the lower Northeast, the Central including Bangkok and its vicinity, and the East regions. Meanwhile, hot weather occurs in upper Thailand where thunderstorms and gusty winds will be forecast in some areas.
The stronger easterly wind across the Gulf of Thailand and the South causes more rain in the upper portion.
  Bangkok Metropolis and Vicinity Forecast    From 17:00 today To 17:00 tomorrow  
Hot with day haze. Isolated thundershowers and gusty winds. Minimum temperature 26-27 °C. Maximum temperature 32-37 °C. Southerly winds 10-20 km/hr.
More Details Issued Date April 11, 2021
  7 days Weather Forecast   April 11, 2021 - April 17, 2021  
     During 10 - 12 April, the moderate high pressure-system from China remains cover the Northeast of Thailand and the South China Sea while hot weather remains over upper Thailand. The southerly and the southeasterly winds bring the moisture from the South China Sea and the Gulf of Thailand to the lower North, the lower Northeast, the Central and the East including Bangkok and its vicinity. Outbreaks of thunderstorms with gusty wind are expected over upper Thailand. The easterly wind prevail over the Gulf of Thailand and the South will strengthen. More rains and isolated heavy rains are likely in the South. During 13 - 15 April, the high pressure-system covering the Northeast of Thailand and the South China Sea is weakening while the southerly and southeasterly winds still bring the moisture from the South China Sea and the Gulf of Thailand to the lower North, the lower Northeast, the Central, including Bangkok and its vicinity and the East regions. Isolated thundershowers with gusty winds are likely in upper Thailand. The easterly wind prevailing over the Gulf of Thailand and the South will weaken. Less rains is forecast in the South (east coast). The westerly wind prevails over the Andaman sea with more rains in the South (west coast). During 16 - 17 April, another moderate high pressure-system from China will extend to the Northeast of Thailand and the South China Sea while hot weather remains over upper Thailand. The southerly and the southeasterly winds bring the moisture from the South China Sea and the Gulf of Thailand to the lower North, the lower Northeast, the Central and the East including Bangkok and its vicinity. Outbreaks of thunderstorms with gusty wind are expected over upper Thailand.
     
Cautions
     During 11 - 12 and 16 -17 April, people in upper Thailand should beware of thundershowers with gusty winds. Farmers should prepare for crop damage.
Issued Date April 11, 2021
  7 day Weather Summary   April 2, 2021 - April 8, 2021  
The heat low pressure cell covered upper Thailand on the first and the last day of the period associated with the southerly and southeasterly wind prevailed over the lower northern, northeastern, central and eastern parts throughout the period. These conditions caused hot weather in most areas of upper Thailand during early and late period mainly in the northern and northeastern parts with very hot weather in several areas of the northern part and in some areas of the northeastern and central parts. By the way, the moderate high pressure area from China extended its ridge to cover upper Thailand accompanied with the westerly trough moved to cover the northern part during the middle period while hot weather existed in upper Thailand continued during early period causing more rainfall in upper Thailand during the mentioned time. Thunderstorms with gusty wind and heavy to very heavy rainfall were reported in several areas. For southern part, under the influence of the active low pressure cell over the Andaman Sea during early period accompanied with the southwesterly and southeasterly winds prevailed over the Gulf of Thailand and the southern part during the middle of the period. In addition, the easterly and southeasterly winds prevailed over the Gulf of Thailand and the southern part during late period caused rain in the southern part throughout the period with heavy to very heavy rainfall in some areas.
Previous Issued Date April 9, 2021