What are the expected rainfall intensities during the thunderstorms?

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Thunderstorm Rainfall Intensity Exceeding 20 Millimeters Per Hour Forecasted

The Malaysian Meteorological Department (MetMalaysia) has forecast that thunderstorms will bring rainfall intensities exceeding 20 millimeters per hour. These heavy downpours are expected to persist for more than an hour in affected areas. This forecast has led to the issuance of a thunderstorm warning across several states.
Forecasted Rainfall Intensity

MetMalaysia's warning indicates that the anticipated thunderstorms will feature rain intensity surpassing 20 millimeters per hour. This level of rainfall suggests a significant and potentially disruptive weather event.
Duration of Thunderstorms

In addition to the high intensity, the thunderstorms are predicted to last for a duration exceeding one hour. This sustained period of heavy rain could exacerbate potential impacts.
Affected Areas

The warning specifically identifies several regions across Malaysia that are expected to experience these conditions. These include parts of Sarawak (Kuching, Serian, Samarahan, Sri Aman, Sarikei, Sibu, Mukah, Bintulu, and Miri), as well as Sik, Baling, and Kulim in Kedah. Other areas under the warning are Hulu Perak in Perak; Machang, Kuala Krai, and Gua Musang in Kelantan; Hulu Terengganu, Dungun, and Kemaman in Terengganu; and Jerantut and Kuantan in Pahang.
Basis for Warning Issuance

The issuance of this warning by MetMalaysia is based on observed signs of approaching thunderstorms. The combination of expected high rain intensity and prolonged duration prompted the department to alert the public in the affected states.

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What are the expected rainfall intensities during the thunderstorms?

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