The Thai Meteorological Department’s outlook for October 4–7 drives current odds, projecting a high-pressure system from China to interact with the weakening southwest monsoon and trigger scattered to widespread thundershowers with gusty winds and isolated heavy rain across the Central region, including Bangkok. This pattern favors peak 24-hour totals in the 50–100 mm range, consistent with typical monsoon-season convective bursts rather than extreme deluges. Model consensus shows limited intensification potential and no active tropical systems nearby, which caps the probability of 100 mm+ events while supporting moderate accumulations over lighter outcomes. Updated TMD briefings and any model shifts in steering flow or moisture convergence ahead of the period could refine these market-implied probabilities.