If you thought 2022 has been, and continues to be, a very wet year, you'd be correct. Prachuap Khiri Khan province is on course to log its highest amount of rainfall in decades, with above-average rain forecast for the coming peak of the monsoon.
October has historically been the province's rainiest month, and during the first nine months of 2022, Prachuap Khiri Khan has already exceeded its full-year precipitation (10-year) average, which was about 1,113 mm.
According to data from the Thailand Meteorological Department (TMD), from January 1 to September 29, 2022 the province received 1,138.5 millimetres of rainfall, which is 44% higher than the 1995 baseline year-to-date "normal" value of 790.1mm.
To date this year, Thailand's Early Warning System has triggered nine incessant rainfall advisories in Prachuap Khiri Khan. Six issued in May were in Bang Saphan and Thap Sakae districts, and three issued in February were in Mueang District. The highest level of these was when 112.5mm fell in Khlong Wan in less than 24 hours on February 15.
Advisories are issued when excessive rainfall is recorded within a 24-to-48-hour period, posing flash flood and landslide threats.
The TMD's Climatological Center forecasts Prachuap Khiri Khan to continue to receive above-average precipitation in October. Large portions of the province are expected to receive in excess of 300mm of rainfall this month.
In the last two decades, the highest amount of rainfall recorded in Prachuap Khiri Khan was in 2017, when the province annual rainfall average was logged at 1,474.5 mm. The province would need to receive at least 340mm in the final three months of 2022 to exceed this and thus attain a new 20-year high.
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