Meteorological Department Warns of Unstable Weather from 4-7 Oct Check Provinces with Heavy Rain and Possible Flash Floods

Local03 Oct 2026 08:06 GMT+7

The Meteorological Department issued its fourth announcement warning of unstable weather in upper Thailand, advising several provinces to prepare for heavy rain and possible flash floods. Check which areas are affected: [Local News, Weather, Flood Warning]

On 3 October 2026, the Meteorological Department updated its fourth announcement at 05:00, stating that areas with heavy and very heavy rain remain unchanged from the previous night's report. The critical period to monitor closely remains 5-6 October. [Weather Update, Rain Forecast]

On 5 October, very heavy rain is expected in Kamphaeng Phet, Phitsanulok, Phichit, Phetchabun, Nakhon Sawan, Uthai Thani, Chai Nat, Sing Buri, Ang Thong, and Phra Nakhon Si Ayutthaya. [Heavy Rain, Northern Provinces]
On 6 October, very heavy rain is forecast for Kanchanaburi and Ratchaburi. [Heavy Rain, Western Provinces]
Bangkok and its surrounding areas remain in the heavy rain zone on both 5 and 6 October. [Heavy Rain, Bangkok Metropolitan Area]
Provinces not listed may still experience thunderstorms but are not expected to be hit by heavy or very heavy rain as per this announcement. [Weather Advisory, Thunderstorms]

Therefore, prepare in advance, check the forecast before leaving home, and monitor rain radar throughout the day. Residents in low-lying areas, near waterways, and foothills should be cautious of flash floods, flash runoff, and flooding from accumulated rain. [Safety Advice, Flood Risk]

At 07:00, we will check again. [Weather Update]

Meanwhile, the full announcement is available on the website. [Official Announcement]Meteorological Department [Organization]Announcement No. 4 on Unstable Weather in Upper Thailand [Weather Advisory]

(Effective from 4 to 7 October 2026) [Date Range]

It states 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 this period as follows: [Weather Forecast]

On 4 October 2026: Upper northern and eastern parts, and the northeastern region. [Regional Weather]
On 5-6 October 2026: Northern, central regions, including Bangkok and its vicinity, eastern region, and upper southern region. The northeastern region will see a decrease in rain. [Regional Weather]
On 7 October 2026: Western parts of the north and central regions, as well as the south; other areas will see reduced rain. [Regional Weather]

This is due to the late rainy season when high-pressure or cold air masses from China cover the north and upper northeast, causing initial thunderstorms, while the southwest monsoon continues over the Andaman Sea, south, and the Gulf of Thailand. [Meteorological Explanation]

The public is advised to beware of dangers from thunderstorms, strong winds, heavy and accumulated rain, which may cause flash floods and flash runoff, especially in foothill areas near waterways and lowlands prone to flooding. Avoid open spaces, large trees, and unstable billboards. [Safety Warning]

Winds and waves in the Andaman Sea and Gulf of Thailand will strengthen; waves in thunderstorm areas may exceed 2 meters. Fishermen in these areas should check routes and navigate cautiously, avoiding stormy zones. [Marine Advisory]

From 8-12 October 2026, the eastern and southern regions will continue to experience persistent rain and occasional heavy to very heavy rainfall. The public should closely follow weather forecasts during this time. [Extended Forecast]

For safety and to reduce impacts, the public should plan daily activities and travel carefully during this period, following announcements from the Meteorological Department and monitoring updates on their website. [Public Advisory]http://www.tmd.go.th [Website]Or call 0-2399-4012-13 and 1182, available 24 hours. [Contact Information]