2011-5-11 20:15 JST
Typhoon AERE recurved its track, and moving over South West Islands with increasing its speed. It passed the northern coast of Okinawa main island, and now entered into Kagoshima prefecture. AMeDAS wind map shows the increased wind speed in South West Islands, but AMeDAS rain map does not show a significant increase in that area, while AMeDAS event detection alerts heavy rains along the coast of Japan Sea from Yamaguchi to Fukui. Please be on alert by watching Real-time weather radar. On the approach of the typhoon, we expanded Wind Map around Fukushima Daiichi Nuclear Power Plant to cover the entire Japan so that we can see the movement of the typhoon on this map. By zooming out the map, you can see the spiral wind pattern of the typhoon. In addition, this wind map can be displayed on AMeDAS wind map or AMeDAS rain map by selecting the "GPV Wind" layer. Finally, I wrote in the yesterday's entry as the reason of "jumping" of the typhoon track is the uncertainty of the center position, but it seems that the real reason is the increased speed of the typhoon after re-curvature. Different from the jump on May 8, this may be a "meaningful" jump, and I feel that I should see the data carefully.
2011-5-10 20:30 JST
Typhoon AERE has moved to south of Sakishima Islands. Real-time weather radar captured the center of the typhoon near the southern border. This typhoon has irregular-shaped clouds where most of the clouds is on the east side, so it seems that Japan Meteorological Agency is having difficulty in determining the center position. Zooming out on detailed track information (Google Maps) indicates that the track made a big jump at May 8 12:00 JST and 15:00 JST of today. Probably this is not due to the speed-up of the typhoon, but because of the change of interpretation about the center position of the typhoon. This situation often happens when a typhoon has a irregular shape or has a very broad central region. This track will be updated in the best track after the reanalysis of observation data.
2011-5-9 19:30 JST
Typhoon AERE is located in the north of Luzon, Philippines. The cloud of typhoons is observed not in the center, but in the south and the east of the typhoon, and not well organized. However, southern Luzon Island is covered by well-developed clouds, and heavy rains killed 10 people. The typhoon is forecast to move to Sakishima Islands, but will not intensify from now. By the way, Digital Typhoon has already provided searching similar typhoons in the past, but we provide a new functionality of searching similar typhoons considering the analysis and forecast. Typhoon Track Forecast (on Google Maps) page shows the list of similar typhoons with the currently active typhoons. Here "Only Analysis" shows the list of similar typhoons we already provided, but "Analysis + Forecast" is a new list of similar typhoons. Comparing two lists, "Only Analysis" shows the list of typhoons that pass Philippines and reach mainland China, but "Analysis + Forecast" shows the list of typhoons that pass Okinawa and reach mainland Japan. This result illustrates that "Analysis + Forecast" can find more appropriate similar typhoons when the active one is near the re-curving point.
2011-5-7 16:30 JST
Typhoon AERE was formed in east of Philippines. This is a typhoon after a long inactive period. After Typhoon Chaba disappeared in last October, this is the first typhoon in 4524 hours. We have the longest record of 4776 hours in the ranking of inactive periods, but 4524 hours is the fourth longest inactive period. The typhoon is forecast to move to the north of Luzon Island moving off the east coast of Philippines.
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