Storm Warning No. 5: Heavy Rain, Strong Winds, and Hail Forecast for At-Risk Provinces

The Meteorological Department has issued a warning of a "summer storm." Warning No. 5 is in effect until 1 May. Check which provinces are at risk of heavy rain, strong gusts, and hail.

On 29 April 2026, the websiteof the Meteorological Departmentreleased Storm Warning No. 5 for upper Thailand, stating that

from 29 April to 1 May 2026, the northern, northeastern, eastern regions, and the eastern and lower central areas will be affected first. Bangkok and its vicinity will be impacted later. The storm will bring thunderstorms, strong gusty winds, hail, and heavy rain in some areas, with possible lightning. This is due to a high-pressure system or cold air mass from China extending over the northeast and South China Sea, while upper Thailand experiences hot to very hot conditions.

Residents in these areas are advised to be cautious of the summer storm by avoiding open spaces, large trees, weak structures, and billboards. Farmers should reinforce fruit trees and prepare to protect crops and livestock from possible damage. People should also take care of their health during the weather changes. The public is urged to follow updates from the Meteorological Department and can get information via its website.http://www.tmd.go.thor by calling 0-2399-4012-13 and 1182, available 24 hours. The provinces expected to experience thunderstorms and strong gusty winds are as follows:

29 April 2026

High risk

• North: Chiang Rai, Phayao, Nan, Uttaradit, Phitsanulok, and Phetchabun provinces.
• Northeast: Loei, Nong Khai, Bueng Kan, Nong Bua Lamphu, Udon Thani, Sakon Nakhon, Nakhon Phanom, Mukdahan, Chaiyaphum, Nakhon Ratchasima, Sisaket, and Ubon Ratchathani provinces.
• East: Chachoengsao, Chonburi, and Rayong provinces.

Moderate risk

• North: Chiang Mai, Lampang, Phrae, and Sukhothai provinces.
• Northeast: Khon Kaen, Kalasin, Maha Sarakham, Roi Et, Yasothon, Amnat Charoen, Buriram, and Surin provinces.
• Central: Nakhon Sawan, Lopburi, Saraburi, Phra Nakhon Si Ayutthaya, Nakhon Pathom, Kanchanaburi, and Ratchaburi provinces, including Bangkok and vicinity.
• East: Nakhon Nayok, Prachinburi, Sa Kaeo, Chanthaburi, and Trat provinces.

30 April 2026

High risk

• North: Mae Hong Son, Chiang Mai, Lamphun, Lampang, Sukhothai, Tak, and Kamphaeng Phet provinces.
• Northeast: Chaiyaphum, Nakhon Ratchasima, Buriram, and Surin provinces.
• Central: Nakhon Sawan, Lopburi, Saraburi, and Phra Nakhon Si Ayutthaya provinces.
• East: Nakhon Nayok, Prachinburi, Sa Kaeo, Chachoengsao, and Chonburi provinces.

Moderate risk

• North: Chiang Rai, Phayao, Nan, Phrae, Uttaradit, Phitsanulok, Phichit, and Phetchabun provinces.
• Northeast: Loei, Nong Bua Lamphu, Khon Kaen, Sisaket, and Ubon Ratchathani provinces.
• Central: Uthai Thani, Chai Nat, Sing Buri, Ang Thong, Suphan Buri, and Kanchanaburi provinces.
• East: Rayong, Chanthaburi, and Trat provinces.

1 May 2026

Moderate risk

• North: Mae Hong Son, Chiang Mai, Chiang Rai, Lampang, Phayao, Nan, Phrae, Uttaradit, Phitsanulok, and Phetchabun provinces.
• Northeast: Loei, Chaiyaphum, Nakhon Ratchasima, and Buriram provinces.
• Central: Nakhon Sawan, Uthai Thani, Lopburi, Saraburi, Suphan Buri, Kanchanaburi, and Ratchaburi provinces, including Bangkok and vicinity.
• East: Nakhon Nayok, Prachinburi, Sa Kaeo, and Chachoengsao provinces.