[Severe Thunderstorms Ahead] Weather for Tomorrow, Monday the 19th: Caution Advised for Intense Thunderstorms Along the Sea of ​​Japan Coast

2026/10/18 16:21

Tomorrow, Monday the 19th, a low-pressure system accompanied by a front will move eastward across the northern Sea of ??Japan, causing deteriorating weather?primarily along the Sea of ??Japan coast from Western to Northern Japan. In the Kanto region, although the area remains under the influence of a high-pressure system, the influx of moist air is expected to lead to increased cloud cover.
Additionally, the pressure gradient around the low-pressure system will tighten, with strong winds forecast for Eastern and Northern Japan.



Weather in Northern Japan
In Northern Japan, a low-pressure system with an associated front will pass near Sakhalin, causing rain and wind to intensify in Hokkaido from the afternoon onwards. Please exercise caution, as heavy rain is possible in the southern part of Hokkaido.
In the Tohoku region, rain will also intensify between the afternoon and evening; some areas along the Sea of ??Japan coast may experience heavy thunderstorms, so please be careful. Remember to bring rain gear when heading out to work or school.

Weather in Eastern Japan
Although Eastern Japan will be under the influence of a migratory high-pressure system located to the east of Japan, the influx of moist air will likely result in increased cloud cover, with rain expected by late at night.
Along the Pacific coast of the Kanto region, the pressure gradient will tighten, leading to stronger winds in areas such as Tokyo and Yokohama.

Weather in Western Japan
In Western Japan, a cold front is expected to move eastward from the Sea of ??Japan, causing weather conditions to deteriorate?particularly along the Sea of ??Japan coast. Across a wide area?including the Kyushu, Chugoku, and Kinki regions?rain is expected to intensify from the early morning hours through late at night. Atmospheric conditions will become highly unstable, and some parts of the Chugoku region may experience localized, intense thunderstorms.

Weather for the afternoon of Sunday, the 18th: Generally good for heading out, though rain is expected in parts of Kyushu, Chugoku, and Shikoku.

2026/10/18 15:30

This afternoon, Sunday the 18th, much of the region from Hokkaido to the Kinki area will be under the influence of a high-pressure system, bringing clear autumn weather?ideal conditions for leisure activities. However, some areas in the Chugoku, Shikoku, and Kyushu regions may see rain.





Across Hokkaido, the Tohoku, Hokuriku, Kanto, Tokai, and Kinki regions, skies will be largely clear, making for a great day to head out. In Hokkaido, autumn foliage is at its peak in many mountainous areas, and in regions from Tohoku to Kanto-Koshin, the leaves are beginning to change color at higher altitudes?perfect conditions for autumn leaf-viewing. Do keep an eye out for the possibility of scattered showers in the evening. The air is also quite dry in many places, making it a good day for hanging out laundry or airing out bedding.

Okinawa will also be mostly sunny, though the Sakishima Islands may experience some scattered showers.

In the Chugoku, Shikoku, and Kyushu regions, moist air flowing in around the periphery of the high-pressure system is likely. If you are heading out, please bring a folding umbrella.
Shikoku, in particular, will see a mostly cloudy day with a chance of rain; in mountainous areas, the rain could occasionally become quite heavy.

In Kyushu, there will be some sunshine until around midday, but cloud cover is expected to increase as the day progresses. Rain clouds will move into various areas, primarily in the southern region; in places like Oita and Miyazaki prefectures, there may be sudden, heavy downpours.

[Latest Typhoon Information] Typhoon 30 (Champa) is expected to intensify into a "violent" storm; it may approach the Sakishima Islands this weekend.

2026/10/18 12:00

As of 9:00 a.m. today, Sunday the 18th, the very strong Typhoon No. 30 (Champi) is located over the Mariana Islands and is moving westward at a speed of 25 km/h. The central pressure is 945 hPa, with maximum sustained winds of 50 m/s near the center and peak gusts of 70 m/s.

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Typhoon No. 30 ? Sunday, the 18th, 9:00 AM
Location: Mariana Islands
Size Category: N/A
Intensity: Very Strong
Movement: West, 25 km/h
Central Pressure: 945 hPa
Max. Sustained Wind: 50 m/s (near the center)
Max. Gust Speed: 70 m/s
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The typhoon is expected to continue intensifying as it moves westward, reaching a "violent" (top-tier) intensity between tonight and the morning of Monday, the 19th. By around the 23rd?later in the week?it is projected to reach the waters south of Okinawa while maintaining a "very strong" intensity. In Okinawa, even while the storm's center remains at a distance, the region is expected to begin experiencing the effects of strong winds and high waves driven by the typhoon's swell, starting from the middle of the week. Regarding the subsequent path of the typhoon, current forecasts now suggest that a high-pressure system will strengthen, making a westward track increasingly likely. However, because the behavior of this high-pressure system is linked to the intensity of the typhoon itself, there remains a high degree of uncertainty.

There is also a possibility that the typhoon could move northward through the East China Sea and approach western Japan; therefore, please be sure to check the latest typhoon information regularly.

[Typhoon Information] Typhoon No. 30 is expected to approach the Sakishima Islands around the 23rd, while maintaining its status as a very strong typhoon.

2026/10/18 07:50

As of 6:00 a.m. today, Sunday the 18th, Typhoon No. 30?a very strong storm?is moving in a westerly direction near the Mariana Islands.

#Typhoon No. 30 (Champa)
As of 6:00 a.m., Sunday the 18th
===========================
Intensity: Very strong
Location: Mariana Islands
Movement: West at 30 km/h
Central pressure: 950 hPa
Maximum sustained wind speed: 50 m/s (near the center)
Maximum instantaneous wind speed: 70 m/s
===========================



Typhoon No. 30 is expected to move west-northwest from today, the 18th, onwards. It is projected to maintain much of its strength as it approaches Okinawa and the Sakishima Islands around Friday, the 23rd. By that time, wind speeds near the center are expected to reach 50 m/s (sustained) and 70 m/s (instantaneous)?a level of ferocity capable of overturning moving trucks and causing buildings to collapse.
Okinawa and the Sakishima Islands may experience severe weather starting around the 23rd as the typhoon draws near.

Forecasts for the storm's subsequent path remain varied; some models suggest it may continue westward and move away from Japan, while others indicate it could shift northward and approach the main island of Honshu. Additionally, as the new week begins, a stationary front is likely to develop near Honshu. Moist air from the typhoon will be transported into the region, potentially leading to heavy rainfall even in areas far removed from the typhoon itself. Please stay updated with the latest typhoon information and take all possible precautions against heavy rain.

Weekly Weather: Rain expected across a wide area early in the week due to a low-pressure system and fronts; keep an eye on the movement of Typhoon No. 30.

2026/10/18 07:25

Moving forward, the area around Honshu will become increasingly susceptible to the influence of low-pressure systems and weather fronts.
In the Nansei Islands (Southwestern Islands), please keep a close watch on the future path of Typhoon No. 30.



Tomorrow, Monday the 19th, a low-pressure system along a front is expected to intensify as it moves from the Sea of ??Japan toward the Sea of ??Okhotsk. Under the influence of this low-pressure system and the front, rain is likely to become widespread, particularly along the Sea of ??Japan side of the country, stretching from Northern Japan to Western Japan. In some areas, the rain may intensify locally and be accompanied by thunderstorms.
In Hokkaido, the passage of the low-pressure system will cause the isobars to tighten, which may lead to stronger winds. Please be cautious of high winds and high waves.

A weather front is expected to remain nearly stationary near Honshu through around the 20th?21st. From Western to Eastern Japan, conditions will likely be mostly cloudy or rainy through around the 21st, while in Northern Japan, this pattern may persist until around the 22nd. From the 22nd onward, the front is expected to stall to the south of Honshu; however, warm, moist air?originating from Typhoon No. 30 is projected to flow toward this front, potentially leading to heavy rainfall, especially along the Pacific side of Western Japan. Please stay updated on any changes to the forecast.



As of 6:00 a.m. today, Sunday the 18th, the "very strong" Typhoon No. 30 is moving in a west-northwesterly direction near Guam in the Mariana Islands. Typhoon No. 30 is moving through waters with sufficiently high sea-surface temperatures, meaning it will retain much of its strength as it travels west-northwest. It is expected to approach the Sakishima Islands around the 23rd. On Friday the 23rd, the maximum sustained wind speed near the center of the typhoon is forecast to reach 50 m/s, with peak gusts of up to 70 m/s?winds intense enough to potentially cause the collapse of some buildings.

Okinawa and the Sakishima Islands may experience severe weather around the 23rd as the typhoon approaches. Please stay tuned for the latest typhoon updates and take all possible precautions to prepare.




Looking ahead, warm air is likely to flow into the region?particularly during the first half of the week?leading to temperatures that are generally higher than average. While daytime highs may reach around 30 C in some areas, clear days?especially in inland regions?are likely to bring significant temperature fluctuations between day and night. In Northern Japan, morning lows could even drop below 0 C in some places. Please take care to manage your health amidst these temperature changes.

Strong Typhoon 30 (Champa) to reach the waters south of Okinawa with very high intensity in the latter half of next week.

2026/10/17 13:10

As of 12:00 PM today, Saturday the 17th, Typhoon No. 30 (Champa) is located in the Mariana Islands and is moving west-northwest at a speed of approximately 30 km/h.

? Typhoon No. 30 ? Saturday, the 17th, 12:00 PM
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Center Location: Mariana Islands
Intensity: Strong
Movement: West-northwest, 30 km/h
Central Pressure: 970 hPa
Maximum Sustained Wind Speed: 40 m/s (near the center)
Maximum Gust Speed: 55 m/s
==================



As the typhoon moves over areas with high sea-surface temperatures, it is expected to intensify while continuing its path toward the northwest. By next Thursday, the 22nd, it is projected to reach the area south of Okinawa with "very strong" intensity.
In the latter half of next week, Okinawa may experience impacts such as strong winds and high waves. Please stay updated on the latest information regarding the typhoon and take necessary precautions well in advance.

Clear skies this weekend—perfect for heading out; keep an eye on changing weather next week.

2026/10/17 12:31

Today, Saturday the 17th, the area around Honshu is under the influence of a high-pressure system extending from the continent, resulting in clear skies across a wide region.
Meanwhile, a steep pressure gradient?created between a low-pressure system over the Sea of ??Okhotsk and the continental high-pressure system?is driving moderately strong northwesterly winds and an influx of cold air into Northern Japan.
Rain is currently being observed in parts of Hokkaido, with snow falling in some mountainous areas.



Tomorrow, Sunday the 18th, the region will remain under the influence of high pressure, bringing clear skies and ideal weather for outdoor activities.
Conditions around Hokkaido are also expected to gradually improve, and it will be a good day for drying laundry.
Conversely, on the Pacific side of Western Japan, skies are likely to be cloudy, with a risk of localized rain?please take note.



At the start of the week, on Monday the 19th, a low-pressure system accompanied by a front will move northeast across the Sea of ??Japan, leading to a deterioration in the weather.
As this front moves slowly across the Honshu region, it may continue to affect the weather until around Wednesday.

Although conditions will temporarily improve during the latter half of the week, the arrival of moist air?associated with Typhoon No. 30?could lead to severe weather in the Southwestern Islands.
Please stay updated with the latest information.

[One-Month Forecast] Temperatures are expected to be above average nationwide over the coming month; caution is also advised regarding rainfall from typhoons, low-pressure systems, and weather fronts.

2026/10/16 19:41

On Thursday the 15th, the Japan Meteorological Agency (JMA) released its one-month forecast, covering the period from October 17 to November 16.

Over the coming month, temperatures are expected to be higher than average nationwide, as the country will likely be covered by warm air. Furthermore, the region will be susceptible to the influence of low-pressure systems and weather fronts; precipitation is expected to be above average along the Pacific coast of Eastern Japan, while in Northern Japan, the sea of Japan side of Eastern Japan, and Western Japan, precipitation will likely be near or above average.


These are the results based on numerical weather prediction models.

Regarding the one-month average sea-level pressure (left image), a trough of low pressure is projected near Japan. With pressure levels expected to be lower than average from Central China to the sea of Japan, and higher than average from Southern China to the area south of Japan, the pattern suggests that moist air from the south will easily flow into the region. Consequently, Northern, Eastern, and Western Japan are expected to be frequently affected by low-pressure systems and weather fronts.

Temperatures at an altitude of approximately 1,500 meters (right image) are projected to be higher than average, particularly across Northern, Eastern, and Western Japan, indicating that the entire country is likely to be covered by warm air.



These charts show the forecasts for average temperature, precipitation, and sunshine duration over the next month, as well as the weekly average temperature forecasts (expressed as probabilities in percent). With the country likely to be covered by warm air, average temperatures are expected to be higher than normal. In particular, temperatures are projected to be significantly above average across Northern, Eastern, and Western Japan during the first half of the period, and in the Okinawa and Amami regions at the start of the period.

Due to the frequent influence of low-pressure systems and weather fronts, precipitation is expected to be above average along the Pacific side of Eastern Japan, while Northern Japan, the sea of Japan side of Eastern Japan, and Western Japan can expect near-normal or above-normal precipitation.

Sunshine duration along the Pacific side of Eastern Japan and in Western Japan is expected to be near or below average. Although weather patterns will shift in cycles lasting a few days, there are likely to be fewer sunny days than usual.

While autumn weather often follows a cycle of change every few days, the coming month is expected to be characterized by a frequent susceptibility to low-pressure systems and weather fronts.
Precipitation is projected to be particularly heavy along the Pacific side of Eastern Japan.
As these systems may lead to localized heavy rainfall, please stay updated with the latest weather information and prepare for the possibility of heavy rain.
Additionally, close attention should be paid to the path of Typhoon No. 30, which is currently moving westward near the Chuuk Islands. Depending on its trajectory, it could potentially impact the Nansei Islands and the Japanese archipelago around next weekend.
Please make sure to check for regular updates on the typhoon.

[Perfect Weather for a Festival] A rock festival will be held on Miyakojima this Saturday, the 17th; with a high of 30°C, it will be warm enough to work up a sweat.

2026/10/16 17:13

A major rock festival will take place tomorrow, Saturday the 17th, on Miyakojima Island in Okinawa Prefecture. The event features a lineup of high-profile artists?acts known for successful performances in stadiums and arenas?making it a major highlight for the island.

In preparation for the festival, we have compiled the local weather forecast for this weekend, along with some tips to ensure a comfortable experience.

Weather for Saturday, the 17th
The weather on Saturday, the 17th, will be sunny with occasional clouds. There is a low chance of rain, and with a high of 30C (86F) and a low of 25C (77F), it will be warm?perfect for a summer-style music festival.



Tomorrow, the 17th, a migratory high-pressure system will cover much of the area around Honshu, extending its influence to Miyakojima. As a result, the island can expect plenty of sunshine, making for a pleasant day for the festival. While some clouds may roll in during the afternoon due to humid air, the chance of rain remains low, ensuring a comfortable day overall.



Tips for Attendees
With clear, sunny skies expected throughout the weekend on Miyakojima, you will likely be exposed to the sun for most of the day. Although a temperature of 30C is relatively manageable, the "feels-like" temperature can be significantly higher in outdoor areas with little shade. Please be sure to stay hydrated and replenish your salt intake regularly.
Additionally, as the venue is located near the ocean, please be mindful of the wind. On Saturday the 17th, winds of around 6 meters per second are expected on Miyakojima, with the possibility of stronger gusts at times.
Please take care to ensure that hats and lightweight personal items are not blown away.

Be sure to check the latest weather updates frequently, and take good care of your health so you can fully enjoy the live concert experience!

Typhoon No. 30: Despite Uncertain Track, Okinawa Should Stay Alert in the Latter Half of Next Week(Analysis by Weather Forecaster Junko Miyake)

2026/10/16 14:35

At 3 PM yesterday, on the 15th, Typhoon No. 30 formed over the far southeastern waters of Japan.

Let's take a look at the projected path of Typhoon No. 30.
The typhoon is currently near the Truk Islands, moving westward.

Its maximum sustained winds near the center are 23 meters per second, meaning it currently has only a strong-wind area and no storm-force wind area yet.

The typhoon is expected to intensify as it moves.
By tomorrow, Saturday, it is forecast to develop a storm-force wind area.
By Sunday, it is expected to strengthen into a "strong" typhoon.

It will continue to intensify as it moves westward, and by Monday the 19th, it is forecast to reach a "very strong" intensity.
Around the middle of next week, its central pressure is expected to drop to around 935 hPa.

There is a possibility that the typhoon will approach Okinawa while maintaining very strong intensity.

As for its future track, it is still uncertain whether it will continue westward or turn toward Okinawa.
At this stage, the direction beyond that point remains unclear.

However, one thing we can say is that the typhoon may approach the Okinawa region while maintaining very strong intensity.

Typhoons intensify by drawing moisture from warm ocean waters.
This map shows sea surface temperatures as of yesterday.
The yellow line marks areas with temperatures of 27C or higher.
South of that line, waters are warmer than 27C-conditions favorable for typhoon development.
The waters around Okinawa are also within this 27C-and-above zone.

Because of this, the typhoon is likely to maintain very strong intensity and may approach Okinawa.
Please continue to pay close attention to updates on its track.

Now, let's look at the weekend weather for Okinawa.

This weekend, many areas will see sunshine under the influence of high pressure.
Daytime temperatures will exceed 30C in many places, which is 2 to 3 degrees higher than average for this time of year.
Heatstroke precautions are still necessary.
Both Saturday and Sunday will see moderately strong easterly winds.

Here is the weekly forecast.
Through around Tuesday next week, many areas will continue to see sunshine.
On Wednesday the 21st, rain is expected to begin in Minami-Daito as the region starts to feel the effects of the typhoon.

Later next week, depending on the typhoon's track, Okinawa may experience severe weather.
Please stay updated with the latest typhoon information.