Tropical Storm Mekkhala (2008) - Meteorological History

Meteorological History

A Tropical Disturbance formed to the south of China, within the Gulf of Tonkin on September 25, 2008. Early the next day the Joint Typhoon Warning Center assessed the disturbances chances of becoming a "significant tropical cyclone" within 24 hours as "Fair". However early on September 27 the JTWC reassessed the disturbances chances becoming a "significant tropical cyclone" as poor. Later that day the Japan Meteorological Agency then designated it as a weak tropical depression. Whilst early the next morning the JTWC upgraded the disturbances chances of becoming a "significant tropical cyclone" to good, and subsequently issued a Tropical Cyclone Formation Alert. Later that day the JMA started to issue full advisories on the tropical depression, as it was expected to become a tropical storm within the next 24 hours. The JTWC then designated the depression as Tropical Depression 20W as they issued their first warning on the depression. On September 29 the JMA upgraded the depression to a tropical storm and named the storm as Mekkhala. Later that morning the JTWC designated Mekkhala as a tropical storm.

Early the next day the JMA reported that Mekkhala had intensified into a severe tropical storm and reached its peak wind speeds of 50kts. However within their next advisory the JMA downgraded Mekkhala to a tropical storm as Mekkhala had made landfall on northern Vietnam during the previous three hours. During the morning of September 30, RSMC Tokyo downgraded Mekkhala to a tropical depression as they issued their final advisory. The Joint Typhoon Warning Center also issued their final advisory that morning as Mekkhalla was expected to weaken below their warning level of 25 kts (30 mph, 50 km/h) and then dissipate later that day. Mekkhala then dissipated over Land later that day.

On November 17, 2008 the Japan Meteorological Agency released their Post Storm Analisyss on Mekkhala. Within it they reassessed the peak wind speeds as 45 knots (50 mph, 80 km/h) which meant that Mekkhala was downgraded from a severe tropical storm to a tropical storm.