What are the expected weather phenomena during the advisory?

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A thunderstorm warning issued by MetMalaysia expects heavy rain, thunderstorms, and strong winds during the advisory period
MetMalaysia has issued a thunderstorm warning for parts of Negeri Sembilan, Melaka, Johor, and Sarawak, with residents being told to prepare for heavy rain, thunderstorms, and strong winds. The advisory was issued at 9.00am today and is valid until 12.00 noon, covering areas where rainfall intensity is expected to exceed 20mm per hour for more than an hour.
Heavy rain and thunderstorms are the main hazards
The advisory specifically warns of heavy rain and thunderstorms affecting the affected regions. MetMalaysia’s short-term alerts are triggered when rainfall intensity is expected to go beyond 20mm per hour for more than an hour, which is the threshold tied to this warning.
Strong winds are also expected
Alongside heavy rain and thunderstorms, residents are also urged to prepare for strong winds. The warning frames the risk as sudden downpours and strong gusts of wind during the validity window from 9.00am to 12.00 noon.
The warning window is set for late morning
The thunderstorm advisory starts at 9.00am today and runs until 12.00 noon. This three-hour period is the timeframe in which MetMalaysia expects the hazardous conditions to occur over the listed parts of Negeri Sembilan, Melaka, Johor, and Sarawak.
The warning covers multiple districts across four states
In Negeri Sembilan, the warning covers Seremban, Port Dickson, Kuala Pilah, Rembau, and Tampin. In Melaka it covers the entire state, while in Johor it includes Tangkak, Muar, and Batu Pahat, and in Sarawak it includes Sri Aman, Betong, Sarikei (Pakan and Julau), Sibu (Kanowit), and Kapit (Song).

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What are the expected weather phenomena during the advisory?

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