Upper Thailand must brace for summer thunderstorms

Group Captain Somsak Khaosuwan at the Thailand Meteorological Department has urged people to beware of the severe conditions by keeping off outdoor places, big trees and billboards. Farmers should prevent damage to crops.

The affected areas are as follows: 
On Wednesday (May 13)
North: Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Phrae and Nan.
The advisory is in effect from Wednesday 5am. 
The next advisory will be issued at 11am.
The high-pressure system from China extends to upper Thailand and the South China Sea bringing hot weather, while the southerly and the southeasterly winds blow in with the humidity. Thunderstorms, gusty winds and hail are possible for the North, the upper Northeast and the upper Central regions. 
In the South, more rains are expected while the western coast gets heavy rains due to the stronger southeasterly winds blowing across the Gulf.
The dust situation is expected to be eased by the increased rainfall.
The weather in Bangkok and its vicinity is expected to be hot with isolated thundershowers. Minimum temperature will be 25-27 degrees Celsius and maximum temperature 36-39 °C. Southerly winds blow at 10-25 km/hr.

Forecast for the next seven days 
On May 12-13, the high pressure area from China extends to the Noetheast of Thailand and the South China Sea while hot conditions are likely in area. The southerly and the southeasterly winds blow in with the humidity over the upper country. Outbreaks of summer storms, thunderstorms, lighting and gusty winds, are expected in the upper Northeast, the North, and the upper Central. Hail is also possible in some areas. 
During May 14-18, the southerly and the southeasterly winds will still prevail over upper Thailand while hot to very hot conditions will prevail in those areas. Isolated thunderstorms with gusty winds are forecast in upper Thailand.