Typhoon 9 (Jongdari) Forms Near Miyako Island: Okinawa on Alert for Heavy Rain and Strong Winds

2024/08/19 04:10 Weather News

At 3 AM on August 19 (Monday), a developing tropical depression south of Miyako Island, Okinawa became Typhoon No. 9 (Jongdari). This marks the fifth typhoon to form this month.

▼ Typhoon No. 9 August 19 (Monday) 3 AM
　Center Position 　About 70 km south of Miyako Island
　Size Class 　／／
　Strength Class 　／／
　Movement 　Almost stationary
　Central Pressure 　1000 hPa
　Maximum Wind Speed 　18 m/s (near the center)
　Maximum Gust Speed 　25 m/s
» Latest Typhoon Information

Caution for strong rain, strong winds, lightning, and gusts in Okinawa

In Okinawa and the Sakishima Islands, where the typhoon is already approaching, caution is needed for heavy rain, strong winds, lightning, and gusts for the entire day of the 19th (Monday). Additionally, in western Japan, which is separated from the northeastern side of the typhoon, there is active cloud formation due to moist air, and caution is necessary for intense thunderstorms.

Looking at the forecast for the subsequent path of Typhoon No. 9, it is likely to move north from the vicinity of Okinawa into the East China Sea and Yellow Sea, making landfall on the continent and losing strength. Significant development is not expected, and it is anticipated to maintain its strength without a typhoon force wind area.

There is no significant impact expected on Kyushu and Honshu; however, if the typhoon moves north away from land, there may be high waves along the coast of the East China Sea, so caution is needed for sea recreation due to rip currents.
» Radar Wind Mode

Reference: Numerical simulation results of the predicted path calculated by meteorological agencies around the world

Each of the thin lines in this diagram represents the results of numerical simulations calculated by meteorological agencies from various countries. These are obtained as part of an ensemble forecasting method (members), and are shown to illustrate the substantial range of predicted paths.

Comparing these members, it is generally agreed that there is a tendency for the typhoon to move north of Japan; however, there is variation in the predictions for it to veer northeast afterwards versus heading towards Honshu. If a westward trajectory occurs, there is a possibility of wind and rain impacts around the long holiday weekend, so it is necessary to keep an eye on changes in the forecast. As time passes, the margin of error is expected to reduce, so please pay attention to future information.

Probability of entering the typhoon’s storm area

The prefectural forecast areas with a probability of entering the typhoon’s storm area of 3% or more within the next five days are as follows: (Japan Meteorological Agency)
　Amami Region 　2 %
　Okinawa Main Island Region 　13 %
　Miyako Island Region 　54 %
　Yaeyama Region 　72 %

This is the fifth typhoon to form this month

Average number of typhoons

This is the first typhoon to form since Typhoon No. 8, which occurred on Tuesday, August 13, marking a gap of six days. It is the fifth typhoon to form this month.

Looking at the average number of typhoons, August typically sees an average of 5.7 typhoons formed, making it the time of year with the highest frequency of typhoon formation. This year, five typhoons have formed in the last two weeks, indicating a pace that is at or above the average.

As the transition from summer to autumn occurs, it is expected that more typhoons will approach the vicinity of Honshu, leading to a full-blown typhoon season, so please prepare for typhoon countermeasures and heavy rain measures.
» Radar Satellite Cloud Image Mode

Name of the Typhoon

The name of the typhoon is selected from a list of 140 names proposed by the member countries of the international organization “Typhoon Committee,” assigned in the order of occurrence.

The name of Typhoon No. 9, “Jongdari,” was suggested by North Korea (Democratic People’s Republic of Korea) and is derived from the Korean word for skylark.
» Radar Typhoon Mode

Reference Materials