天気と災害の情報共有

Typhoon No. 27 has intensified to a central pressure of 925hPa, with maximum instantaneous wind speeds reaching 70m/s. Although still distant from Chichijima Island, instantaneous wind speeds of 22m/s have been observed onshore, marking the closest approach to the Ogasawara Islands. The typhoon is expected to move north-northeast and away from the archipelago. However, due to strong winds, wave heights will be around 8m at the center and 4m around Honshu, so caution is advised for marine activities. Recently, a diving group near Hachijojima Island was rescued by the Coast Guard due to waves shifting their surfacing point during a typhoon approach. Do not let your guard down and avoid going near the sea until Typhoon No. 27 has passed. The hurricane that formed off the coast of Mexico has crossed the International Date Line and entered Japanese territory, where it has been reclassified as Typhoon No. 28. It is currently moving westward near the Midway Islands and is developing into a small but extremely powerful storm. As Typhoon No. 28 is moving westward, there is a high probability it will pass over the Ogasawara Islands, requiring close monitoring of its trajectory until next weekend. Meanwhile, Typhoon No. 29 has formed near the Marshall Islands. Although small and weak, currently in its early stages as a typhoon, gale-force winds are expected in the future. Typhoon No. 28 is approaching from the east of Chichijima, while Typhoon No. 29 is approaching from the south, and they are expected to make landfall almost simultaneously. Depending on the forecast track, prolonged heavy rain and wind or even a merger are possible, so extreme caution is advised.

On Monday, due to the influence of a cold low-pressure system with a front approaching the Sea of Japan, the general outlook is cloudy with occasional rain. In Niigata, temperatures are expected to rise sharply due to the Foehn effect. Meanwhile, Tuesday will be sunny nationwide, with temperatures in the rest of the country, excluding Niigata, feeling like the lingering heat of summer. While the maximum temperature will be around 29 degrees Celsius, the minimum temperature will be around 19 degrees, resulting in a 10-degree temperature difference within the day. As the risk of temperature-difference allergies is high, please be mindful of measures against the cold. Typhoon No. 27 is expected to develop into a large and extremely strong typhoon, intensifying to 935hPa with an estimated maximum instantaneous wind speed of 65m/s. A wave warning is currently in effect for the Ogasawara Islands, and a Level 4 wave warning may be considered depending on its approach. The typhoon is forecast to pass by the islands and move eastward, so the impact of No. 27 will be limited to the waves. Separately, a low-pressure system moving westward near the Marshall Islands is expected to approach, with its influence beginning next Saturday. Additionally, a hurricane that formed in Mexico may cross the International Date Line and could be identified as a new typhoon. The Japan Meteorological Agency is urging early preparations, as two typhoon-level systems are expected to have an impact next Saturday and Sunday.

Mainland Japan will enter a period of stable climatic conditions for the next week. Due to the strengthening of the migratory anticyclone, cloud cover will be somewhat significant and there will be scattered showers, but severe weather is expected to be avoided. On Sunday, Western Japan should be mindful of adverse weather conditions. Rain clouds will move in from a low-pressure system located in the northwestern Korean Peninsula, increasing the likelihood of rain in Kyushu, Chugoku, Kinki, and Hokuriku regions. Temperatures are trending downwards today, but tomorrow is expected to reach highs around 25 degrees Celsius. However, it will not feel muggy, and will likely be a crisp, clear autumn day. Typhoon No. 27 is slowly moving northward near the Mariana Islands, having developed into a large and strong typhoon with a central pressure of 960 hPa. It is expected to intensify into a very strong typhoon by tomorrow. A direct hit would be unavoidable in terms of damage, but its path is likely to be avoided. By Tuesday, it is projected to reach the waters east of Miyakejima and then rapidly move away eastward into the Pacific Ocean, pulled by a high-pressure system. The main concerns will be wind and wave height; the impact of rain clouds on mainland Japan is expected to be negligible. Analyzing the long-term weather charts, a low-pressure system with 6 isobars is predicted to approach next Saturday, likely becoming Typhoon No. 28, indicating that the typhoon season is still ongoing. This year has already observed the formation of at least one typhoon per month, a phenomenon that has only occurred twice in the past, so attention should be paid to future developments.

The forecast for this weekend is sunny across the country. It's been since August since the Kanto region saw a sunny weekend, making this a truly rare clear spell. The skies will be bright and temperatures are expected to reach summer-like levels, but the humidity won't be high, so you should be able to enjoy a refreshing autumn day. Due to the influence of a typhoon arriving mid-next week, it would be best to finish your laundry by Sunday, and it's also perfect for going out. Typhoon No. 27 is located south of Chichijima, currently with a central pressure of 985hPa. Although it's small and compact now, it's expected to develop into a very strong typhoon from tomorrow and approach east of Miyakejima by Tuesday while maintaining its strength. The Japan Meteorological Agency anticipates the typhoon will move eastward before approaching Honshu, but there's a possibility of strong or gale-force winds affecting the coast of Chiba Prefecture, so please be aware. Due to the passage of a low-pressure system associated with the approaching typhoon, Tuesday and Wednesday will be cloudy with occasional rain. However, after that, it's expected to become sunny with occasional clouds, leading to generally stable weather.

On Friday, clear weather conditions are expected across most of Japan, excluding Okinawa, Hokkaido, and the Kanto region. Cloudy skies or rain in Kanto are due to the influence of a low-pressure system pulled by a typhoon. While cloudy weather will persist throughout today, strong sunny spells are anticipated nationwide tomorrow, except for Hokkaido. This precious sunshine, combined with it being the weekend, makes it an ideal time for laundry or outdoor activities. Meanwhile, Typhoon No. 27 has currently developed to 998hPa and is expected to intensify into a strong typhoon by Sunday. Most ensemble forecasts from various countries predict that it will not approach the Ogasawara Islands, but will skirt the mainland while bringing some areas into its strong wind zone. It is expected to make its closest approach on Wednesday, with an estimated impact limited to whether the strong wind zone will affect the Chiba coast. Given the absence of fronts or low-pressure systems over the mainland around that time, it remains uncertain how much of an impact Typhoon No. 27 will have in terms of severe weather. Caution is likely only necessary for those involved in activities in the Ogasawara Islands and surrounding waters. For the upcoming week, a tendency towards cloudy weather with some rain is expected, but signs of clear skies are also anticipated. With little indication of rising temperatures, you should be able to enjoy the autumnal seasonal feel. We hope you can fully enjoy this period without the need to worry about disasters.

The first day of October is expected to be sunny nationwide, although Okinawa and Hokkaido have rain forecasts, and the influence of the front will dissipate over Honshu. The Kanto region needs to be mindful of brief showers in the morning, but clear skies are anticipated over a wide area in the afternoon. Even so, if rainfall exceeds 1mm on the day, the continuous rainfall record will be maintained. It's the first time in recorded history that Tokyo has experienced rainfall every day from September 1st to 30th, and the continuous rainfall record is being updated daily. Today's rain is expected to subside around dawn and then turn to clear skies, but the continuous rainfall record itself may still be extended. Typhoon No. 27 is currently a tropical depression with a central pressure of around 1000hPa and is forecast to develop into a strong typhoon with a storm surge. The main concern is its projected path. Ensemble forecasts from various meteorological agencies suggest it will move north through the Pacific, passing west of the Ogasawara Islands as anticipated by the Japan Meteorological Agency, and then curve eastward. At first glance, it might seem safe as it's not expected to make a direct hit. However, based on past trends, there's a possibility of the worst-case scenario: the typhoon maintaining its strong intensity and drawing warm ocean currents. Past heavy rains, including the one in Chiba, have followed this pattern. The impact is estimated to occur from next Wednesday onwards.

Apparently, Tokyo has observed 34 consecutive days of precipitation, setting a new record for the longest stretch. I kept seeing and hearing phrases like 'gloomy skies' and 'possibility of scattered showers' on the weather forecast, but I never imagined it would last this long. Could this also be due to the super El Niño?

Typhoon No. 26 is moving eastward, having weakened to 965hPa. While its size and intensity haven't been officially announced, it's generally considered a small and weak typhoon. The typhoon is expected to transform into a rain-bearing system, bringing relatively heavy rain to the Ogasawara Islands, but it's unlikely to significantly impact mainland Japan. The autumn rain front, influenced by the typhoon, will split and be pulled towards the Pacific coast. Consequently, the rain over mainland Japan is expected to move out to sea by dawn. However, in the Kanto region, the rain clouds will pass through as the front is pulled eastward, so sudden showers should be anticipated. Following the typhoon's passage, starting tomorrow, we can expect clear skies. However, looking at the long-term weather charts reveals some concerning signs. Next Sunday, a low-pressure system is approaching east of Minami Torishima, with isobars indicating a significant development (6 lines). This is likely to become Typhoon No. 27, heading directly for the Ogasawara Islands and potentially striking mainland Japan. By Tuesday, it's projected to be south of Hachijojima, so residents in the Kanto and Tokai regions should stay updated on typhoon information next weekend.

It briefly intensified to a very strong 945hPa, but has now weakened to a strong 965hPa and is moving forward. Integrating with various weather forecasts, it's certain to head directly for the waters near Hachijojima. While two days ago there was a possibility of it approaching or even making landfall on the mainland, it's safe to say that possibility has now disappeared. Typhoon No. 26 has not been classified by the Japan Meteorological Agency in terms of size; they advise against using terms like 'small typhoon' as it can lead to underestimation of its impact. However, to use the term here, it's a small but strong typhoon passing near the coast. Considering the lack of landfall possibility on the mainland, its direct impact will be limited to those engaged in maritime activities. Now for the main point: the typhoon remains strong. As mentioned earlier, its small size does not diminish the threat; the central rain clouds and winds still require attention. The troublesome aspect regarding its impact on the mainland is the autumn rain front, which is stalled over the Pacific coast of the mainland and is likely to draw in winds from the typhoon. Depending on the typhoon's position, the rain clouds over the mainland will continuously shift and expand, so please obtain the latest weather information.

Typhoon No. 26 is slowly moving eastward south of Okinawa, developing into a very strong typhoon. It has already intensified to 945hPa and, despite its compact size, is packing intense winds and rain at its core. Surrounding wave heights are significant, and the impact will extend to the Pacific coast. Please note that future track predictions still have many uncertainties. Based on this, the estimated path is expected to be towards the northern Ogasawara Islands and near Miyake Island. Regarding Typhoon No. 26, its size classification has not been announced, and there's a reason for this. Historically, typhoons had three strength classifications (from weak to violent) and three size classifications (from small to very large). However, the misunderstanding that small typhoons would cause small damage led to immense destruction. There was also a history where people were told it was a weak typhoon, but the rain was so heavy that it caused severe disruption. Typhoon No. 26 is generally considered a small typhoon, but because the official stance is to avoid using that term, private weather companies are using the word 'compact.' While No. 26 is indeed small, considering that 945hPa is just short of 'violent,' it is crucial to be extremely vigilant as this is a typhoon requiring maximum caution.