Where the Rain Fell: Chumphon Soaked, Hua Hin Nearly Dry

The warning says Prachuap Khiri Khan, but the water is falling in Chumphon. In the 24 hours to about 5am on Tuesday, the ThaiWater gauge network logged 163 millimetres at Wang Mai, just outside Chumphon town. Nineteen gauges across Hua Hin district averaged 3.2 millimetres. The wettest Hua Hin reading was 36 millimetres at Nong Kae, west of Phetkasem Road.

Those figures come from the ThaiWater rain_24h feed, the public data service run by the Hydro-Informatics Institute. Readings are stamped between 01:00 and 06:00 on 10 November, so each gauge covers a slightly different 24 hours. They arrive under an alert that has now been running for days. The Department of Disaster Prevention and Mitigation (DDPM) put 16 central and southern provinces on watch for flash floods, run-off and mudslides from 9 to 13 November. Phetchaburi and Prachuap Khiri Khan are on the list, InfoQuest reported through RYT9.

The gauges, north to south

The chart below takes the highest single gauge in each district between Cha-am and Pathio, with the district average beside it. The pattern is a cliff. Everything from Cha-am down to Bang Saphan Noi in Prachuap Khiri Khan sits at 36 millimetres or less. Everything in Chumphon is at 52 or more.

Chart: Hitkub. Data from the ThaiWater rain_24h feed, readings 01:00 to 06:00 on 10 November 2026. Single gauges can read high or low, so the district average is shown too.

The averages sharpen it. Chumphon town averaged 34.5 millimetres across 15 gauges, Pathio 27.1 and Lang Suan 23.5. Pran Buri averaged 2.3, Kui Buri 0.1 and Prachuap town 0.1. Only Hua Hin produced a single reading above 6 millimetres in the northern half of the chart, and that came from one gauge among 19.

Why the notice and the gauges disagree

The Thai Meteorological Department attributes the rain to a strong cold high from China that is strengthening easterly winds over the Gulf of Thailand, according to the same RYT9 report. Its forecast language for the south is heavy to very heavy rain through 13 November. A warning that covers a whole province cannot say which district gets the cloud, and this morning’s gauges show how uneven that can be. Our weekend report found the same lopsidedness on 7 November, and Monday’s briefing logged 70 millimetres at one Nong Kae gauge on a day when most of the district was nearly dry.

Totals can also build slowly. The 1 November flood report recorded 300 millimetres over six days at Bang Saphan against 36 at Hua Hin’s town gauge. A quiet Tuesday in Prachuap Khiri Khan therefore says little about Friday, and none of the sources reviewed gives a daily forecast for Hua Hin itself. The department’s 7 November advisory listed Prachuap Khiri Khan and Chumphon for heavy rain on all three of its days, the Nation reported, with neither named in the very heavy band.

What it means for plans

For anyone staying in Hua Hin, the gauges point to ordinary rain-day logistics rather than disruption. Keep a plan B for beach and open-air evenings. Watch Nong Kae and the hill roads west of Phetkasem if a cell stalls over the district. Anyone driving or flying south is more exposed. Chumphon sits on the Phetkasem route to Surat Thani, and our report on Ezy’s new Hua Hin to Surat Thani flight covers the air alternative. We found no report of a closed road on that route in the sources reviewed, so check live conditions before leaving.

Need	Where	Number or link
Weather warnings	Thai Meteorological Department	1182 hotline, tmd.go.th
Flood and disaster alerts	DDPM	1784, Thansettakij lists it
Live 24-hour rain gauges	ThaiWater	thaiwater.net

The next test is the department’s updated notice for the rest of the week. The warning window ends on Friday 13 November, and the Gulf coast’s northern end has so far stayed on the dry side of it.