Meteorological Department Bulletin No. 2 Warns of Unstable Weather from 4-7 Oct 2026 Check Affected Provinces

Local02 Oct 2026 08:15 GMT+7

The Meteorological Department issued Bulletin No. 2 concerning unstable weather during 4-7 October 2026, warning of heavy to very heavy rain in some areas and listing the provinces expected to be affected.

On 2 October 2026, reports indicated thatthe Meteorological Departmentposted a message stating that Bulletin No. 2 was updated at 05:00 hrs.

As mentioned by the admin last night about reviewing any changes this morning, the summary is that areas with heavy and very heavy rain during 4-7 October remain unchanged from Bulletin No. 1.

On 5 October 2026, areas with very heavy rain remain Kamphaeng Phet, Phitsanulok, Phichit, Phetchabun, Nakhon Sawan, Uthai Thani, Chai Nat, Sing Buri, Ang Thong, and Ayutthaya.
On 6 October 2026, the affected provinces are still Kanchanaburi and Ratchaburi.
Meanwhile, Bangkok and the metropolitan area are expected to have heavy rain on both 5 and 6 October 2026.

Therefore, those who prepared based on last night's information can continue preparations as no areas have been added or removed since the previous bulletin. The next update will be at 17:00 hrs today, when the admin will provide a comparison.

However, the websiteof the Meteorological Departmentissued Bulletin No. 2 regarding unstable weather in upper Thailand effective from 4-7 October 2026.

It stated that from 4-7 October 2026, upper Thailand will experience unstable weather characterized by thunderstorms, strong gusts, and heavy to very heavy rain in some areas, affecting different regions during the following periods.

On 4 October 2026, the upper northern and eastern parts and the northeastern region
On 5-6 October 2026, the northern, central including Bangkok and its vicinity, eastern, and upper southern regions, with decreased rain in the northeast.
On 7 October 2026, the western parts of the north and central regions, as well as the southern region, with decreased rain in other areas.

This is because late in the rainy season, a high-pressure area or cold air mass from China spreads over northern and upper northeastern Thailand, causing initial thunderstorms, while the southwest monsoon continues to cover the Andaman Sea, southern region, and the Gulf of Thailand.

The public is advised to be cautious of dangers from thunderstorms, strong gusts, heavy and accumulated rain that may cause flash floods and forest runoff, especially in foothill areas near waterways and low-lying regions prone to flooding, and to avoid open spaces, large trees, and unstable advertising signs.

Waves and winds in the Andaman Sea and the Gulf of Thailand will strengthen, with waves over 2 meters high in storm areas. Seafarers should check routes and navigate carefully, avoiding areas with thunderstorms.

Furthermore, from 8-12 October 2026, the eastern and southern regions will continue to have rain, with some areas experiencing heavy to very heavy rain. The public should closely monitor weather forecasts during this period.

For safety and to minimize possible impacts, people are urged to plan their activities and travel cautiously during this time and to follow announcements from the Meteorological Department via their websitehttp://www.tmd.go.thor by calling 0-2399-4012-13 and 1182, available 24 hours.