Tomorrow's front moves northwards, Hokuriku region is at risk of heavy rain again; strict vigilance against landslides

2026/08/28 17:57

A front is extending from the vicinity of the Korean Peninsula to the east of Japan, passing through the Pacific side of eastern Japan. Additionally, a low-pressure system with cold air in the sky is moving northeast off the coast of Nemuro, creating a pressure trough from northern Japan to eastern Japan.

The front will remain stationary for most of today, the 28th, but it is expected to turn northward tomorrow, the 29th (Saturday), and move northward into the Tohoku region into the 30th (Sunday).

Due to the effects of warm, humid air flowing toward this front, cold air in the upper atmosphere, and a trough in atmospheric pressure, the atmospheric conditions will be extremely unstable from eastern Japan to western Japan until the 30th (Sunday), and in northern Japan until the 30th (Sunday), resulting in heavy rain with thunderstorms and very heavy rain of over 50 mm per hour, or heavy rain of over 30 mm per hour.
In particular, the Hokuriku region, which experienced record heavy rain yesterday on the 27th, is expected to experience heavy rain again in some places as the front moves northward, from Saturday the 29th tomorrow to Sunday the 30th.

Please be extremely cautious of landslides in the Hokuriku region from the 29th (Saturday) to the 30th (Sunday), and from eastern to western Japan from the 30th (Sunday) tomorrow, and in northern Japan from the 30th (Sunday) the following day, please be careful of landslides, flooding of low-lying areas, and rising river waters. In northern and western Japan, there are places where the ground has become loose due to past heavy rains, and there is a risk that the risk of landslides will increase even with less rain than usual. Please stay away from places near cliffs.



#Expected amount of rain (in areas with a lot of it)
+Precipitation expected for 24 hours by 18:00 tomorrow 29th (Sat)
Hokuriku region 100mm
Kinki region 10 0mm
Chugoku region 120mm
+Precipitation expected for 24 hours by 18:00 on the 30th (Sunday) the next day
Hokuriku region 120mm
Tohoku region 80mm

Weather for tomorrow 29th (Saturday): Heavy rain near the front

2026/08/28 17:54

Tomorrow, the autumn rain front will remain near Honshu, causing unstable atmospheric conditions. Rain clouds tend to develop around the front, and vigilance is required for localized heavy rain and thunderstorms.



Kyushu will be less affected by the front, and there will be many sunny days. There are many places with extremely hot days of over 35 degrees Celsius, so maximum vigilance against heat stroke is required. Make sure to drink plenty of water and rest in a cool place. In other parts of western Japan, there will be plenty of clouds, but there will be periods of sunshine, and it is expected to be a hot and humid day.
Close to the front, from southern Tohoku to eastern Japan, clouds will likely spread, and it will rain in places. In Hokuriku in particular, rain clouds are likely to develop due to the influence of moist air flowing in from the Sea of Japan, and heavy rain with localized thunder is expected. Please be especially careful in areas that have already been affected by heavy rain. Rain may become heavier temporarily in the Kanto and Tokai regions. Temperatures are not expected to rise due to the rain.
The weather will improve in Hokkaido and the sun will shine. There are many places where the temperature does not reach 25 degrees Celsius even during the day, making the weather relatively pleasant and sunny.
It's expected to be a cloudy day in the northern Tohoku region, with few midsummer days expected.

Typhoon No. 23 (Banrang) occurs, making it the 10th typhoon this month

2026/08/28 16:13

Typhoon No. 23 (Banrang) occurred near Wake Island at 12 noon today, the 28th. This is the 10th outbreak this month. There were many typhoons in August this year, about twice as many as in a normal year (5.7).

#Typhoon No. 23 Friday 28th 12:00
==================
Center location Near Wake Island
Movement Northeast 20km/h
Central pressure 1002 hPa
Maximum wind speed 18 m/s (near the center)
Maximum instantaneous wind speed 25 m/s
==================



The typhoon is expected to continue moving northward across the far east of Japan. It is not expected to develop much and is expected to turn into a tropical cyclone around the 1st (Thursday), and there is no expectation that there will be any direct impact on the Japanese archipelago.

[Risk of heavy rain again in Hokuriku] Be wary of new disasters (Commentary: Weather forecaster Atsuko Miyake)

2026/08/28 13:56

Ishikawa and Toyama prefectures, which have experienced record heavy rain, are likely to experience heavy rain again this weekend.
New disasters may occur, so vigilance is required.



Precipitation in the 48 hours up to 11 a.m. today (Friday) was 479 mm in Himi City, Toyama Prefecture, 357 mm in Hodatsushimizu Town, Ishikawa Prefecture,
and 347.5 mm in Hakui City, Ishikawa Prefecture,
all of which are heavy rains that are the highest in recorded history.

At this time, the front is moving south,
active clouds cover the area from the Sea of Japan to the Chugoku and Kinki regions.
Heavy rain exceeding 30mm per hour has been observed in Shimane Prefecture.

Meanwhile, clouds associated with a low pressure system are passing through Hokkaido, so please be careful of heavy rain and lightning in the evening.



The front is expected to gradually move northward into tomorrow (Sat).
Warm, humid air flows toward the front from the south.
The frontal activity is increasing, and it looks like heavy rain will once again occur in the Hokuriku region.



Rain cloud forecast.
Today, rain clouds will gradually move northward.
Linear rain clouds are also expected to develop over the Sea of Japan.

By the time the date changes to tomorrow (Saturday),
heavy rain is expected to increase again in Ishikawa and Toyama prefectures.

From around noon tomorrow, red signs will start to appear in Toyama and Ishikawa prefectures, and there is a risk of heavy rain, or even very heavy rain in some cases.
If rain clouds form in a line, there is a risk of more rain.

In addition, the Tokai region, Kanto-Koshin region, and Tohoku region are also likely to experience heavy rain in some places.
When going out, it's safe to have rain gear.

If rain clouds develop locally and become stagnant,
there is a risk of warning-level heavy rain.



In Hokuriku, where the ground has loosened due to the heavy rain that has fallen so far, there will be even more heavy rain.
New disasters may occur.

Please stay away from flooded rivers.
In large rivers, the water level may rise even after the rain has stopped, so please stay away from rivers even after the rain has stopped.
Please do not go to see the rice fields.

Also, cliffs that contain large amounts of rainwater may collapse, so
try to stay away from cliffs and slopes.

It looks like there will be some places where the rain peaks during the dark hours of the night.
It is actually dangerous to evacuate after dark.
Please move to a safe place now while it's daylight.



The front is expected to move further north the day after tomorrow (Sunday).
The reason this front is moving north is because the Pacific anticyclone to the south is becoming stronger.
As this Pacific high pressure system strengthens, the heat will return.



Let's take a look at the forecast for the coming week, focusing on the maximum temperature.

Fukuoka is expected to continue experiencing extremely hot days with temperatures exceeding 35c.
In Osaka, extremely hot days of over 35c are expected on the 31st and September 1st.
In Nagoya, it has been extremely hot days since the 30th, especially on Monday the 31st, when the temperature reached 38 degrees Celsius, making it unbearably hot.
Please be careful about heat stroke.
Even in the Kanto region, the last day of August, the 31st (Monday), is expected to be extremely hot with temperatures reaching 35 degrees Celsius.
Please be careful not to get sick.



Detailed weather information for each location.
Unstable atmospheric conditions will continue throughout the country into tomorrow (Saturday).
Please be careful of sudden changes in the weather even in sunny areas.

And in Kyushu, it continues to be extremely hot, exceeding 35 degrees Celsius.
If you live in an area affected by the Kumamoto Earthquake, please be careful not to get heatstroke while working on the recovery work.



Weekly forecast.
The heat will return to western and eastern Japan next week.
In Western Japan, there are many extremely hot days even into September.
Please continue to be careful of heat stroke.

It will continue to rain in northern Japan and Hokuriku into next week.
Please be careful about the rain and heavy rain here.

There is a risk of heavy rain in Hokkaido on September 2nd (Wednesday) due to the damp air.

Weather for 28th (Friday): Linear precipitation band possible in 4 Tokai prefectures, Hokkaido, and Hokuriku; warning of heavy rain over wide area

2026/08/28 06:54

Today, the 28th, a low pressure system is moving northeast near Hokkaido.
A front extending from a low-pressure system in the east of Japan is extending east-west from the east of Japan, passing through the Tokai and Kinki regions.
A linear precipitation band formed early this morning in the Kushiro region of Hokkaido near the low pressure system, and heavy rain was observed.
As active rain clouds are expected to continue in the morning,
Please continue to ensure your safety.



The warm, humid air of Typhoon No. 18 moving westward in the East China Sea is flowing into the front, making the atmospheric condition extremely unstable near the front.



Currently, rain clouds from the
front are covering the area from Kanto-Koshin to the Tokai, Kinki and Chugoku regions.
The Japan Meteorological Agency is warning of the possibility of a linear rain band forming in the Tokai region until noon today. Please pay attention to the latest information regarding heavy rain.




The weather is expected to gradually improve in northern Japan, and there will be some places where the sun will shine in the afternoon.
The rain in eastern and western Japan is expected to gradually stop in the afternoon.



The ground is loose in some places due to the rain since the day before yesterday.
Even after the rain has subsided, it is still necessary to be wary of landslides and debris flows.
Please refer to the Japan Meteorological Agency website "Kikikuru" and check the evacuation actions that are required at this time.

Typhoon No. 22 (Atau) occurs, heading north near Wake Island

2026/08/28 00:12

At 3:00 p.m. on the 27th, a
tropical cyclone became typhoon No. 22 near Wake Island, far southeast of Japan.
Typhoon No. 22 is moving north at a speed of about 15 kilometers per hour.

Typhoon No. 22 (as of 21:00 on the 27th)
Central pressure: 998hPa
Maximum wind speed near the center: 18m/s
Maximum instantaneous wind speed: 25m/s
Travel direction: north-northwest
Travel speed: 15km/h

It is expected to advance northward as it intensifies through the night of the 28th, then weaken slightly on the 29th and change course to the north-northwest. It will change its course to the north-northeast on the
31st and become a tropical depression on the night of
September 1st.



The impact on Japan is expected to be small at this stage, but
please be careful about the future course.

Heavy rain over a wide area into the 28th (Friday); linear precipitation band possible in the Tokai region

2026/08/27 18:56

The front is extending from the Sea of Japan to the east of Japan, passing through northern and eastern Japan, and will gradually move south until tomorrow the 28th, reaching from the Sea of Japan coast of western Japan to the Pacific coast of eastern Japan.
In addition, through the 28th, a low-pressure system with cold air in the sky is expected to move from the Sea of Japan to the Sea of Okhotsk, and a trough of pressure is expected to pass from northern Japan to eastern Japan.



The warm, humid air flowing towards the front, the cold air in the upper atmosphere, and the trough in the atmospheric pressure will make the atmospheric condition extremely unstable until the 28th,
very heavy rain accompanied by thunder and heavy rain will occur over a wide area from northern Japan to western Japan, leading to heavy rain in some places.

[Rain Forecast]
Expected 24-hour precipitation from 6:00 p.m. on the 27th to 6:00 p.m. on the 28th is high in some places,
Hokkaido region 120mm
Tohoku region 120mm
Kanto-Koshin region 150mm
Hokuriku region 180mm
Tokai region 180mm Re
Kinki region 150mm
Chugoku region 100mm

Then, expected from 18:00 on the 28th to 18:00 on the 29th The 24-hour rainfall is high in some places, and if a linear precipitation band of 80mm
occurs in the Hokuriku region, there is a risk that the rainfall will increase locally.

Furthermore, the Japan Meteorological Agency is calling for caution in the Tokai region, where linear precipitation bands are forming and the risk of heavy rain disasters may rapidly increase.

[Forecast of meteorological phenomena]
The following are the regions and periods where linear precipitation bands may occur and the risk of heavy rain disasters may rapidly increase.



(Tokai region) Shizuoka Prefecture From dawn to noon on the 28th
(Tokai region) Aichi Prefecture From dawn to noon on the 28th
(Tokai region) Gifu Prefecture From dawn to noon on the 28th Kete
(Tokai Region) Mie Prefecture From dawn to noon on the 28th

Please further increase your preparedness for heavy rain and pay attention to disaster prevention weather information and information such as Kikikuru, which will be announced in stages.

Weather for tomorrow, the 28th (Friday): The area of rain will expand to the west

2026/08/27 18:15

Rain is expected over a wide area from Hokkaido to Chugoku and Shikoku due to the southward movement of the autumn rain front and the effects of low pressure. There is a risk of localized heavy rain, so vigilance is required in various areas.



Due to the influence of the autumn rain front, it will be easy to rain over a wide area from Kanto to Chugoku and Shikoku. Rain clouds are expected to develop, especially in the Hokuriku region, northern Kinki region, and the Sanin area near the front, and locally heavy rain is expected. There is also a possibility of heavy rain in the Tokai and Kanto regions.
Also, as a low pressure system accompanied by cold air passes through Hokkaido, there is a risk of heavy rain in various places from dawn to early morning.
The weather in Tohoku will gradually improve, and there will be times when the sun will reach us. Kyushu is less affected by the front and receives plenty of sunlight, but the lingering heat is expected to reach over 35 degrees Celsius, so please be careful of heatstroke.

Tomorrow is a full moon. A beautiful full moon is likely to be seen in the Tohoku Pacific side, Kyushu, and Okinawa. Let's look forward to other regions next month.

Finally, tomorrow the 28th is Weather Forecaster's Day. The name comes from the fact that the first national weather forecaster exam was held on this day in 1994. As weather forecasters, we work hard every day to improve our accuracy. I hope it will be of some use in your life...

The level 5 heavy rain special warning for Ishikawa and Toyama prefectures has been changed to a level 3 heavy rain warning, so please continue to be careful.

2026/08/27 17:29

The level 5 heavy rain special warning issued for Ishikawa and Toyama prefectures was changed to a level 3 heavy rain warning at 4:20 p.m.

Although the heavy rain alert level has been lowered, please continue to be cautious of flooding of low-lying land, rising water levels, and flooding of rivers into the morning of tomorrow, the 28th (Friday).
Also, there are some places where the ground has become loose due to heavy rain. Please be on high alert for landslides before noon on Friday the 28th.

Be careful of strong gusts of wind, including lightning and tornadoes, from the evening of Friday the 28th. There is also a risk of hail, so please be careful when managing crops and agricultural facilities.



Currently, there is a lull in the rain, but there is a possibility that active rain clouds will form again into the morning of tomorrow, the 28th (Friday). Please pay attention to the latest disaster prevention information and evacuation information, and frequently check the level of risk in your area on the Japan Meteorological Agency's website Kikikuru.



[Rain forecast (Hokuriku region)]
The predicted 1-hour rainfall today, the 27th (Thursday), is high in some places
Niigata Prefecture 40mm
Toyama Prefecture 60 mm
Ishikawa Prefecture 40 mm
Fukui Prefecture 40 mm

The predicted hourly precipitation for tomorrow, the 28th (Friday) is high in the following areas:
Niigata Prefecture 50 mm
Toyama Prefecture 60 mm
Ishikawa Prefecture 50 mm
Fukui Prefecture 50mm

The expected 24-hour precipitation from 6pm today, Thursday, the 27th to 6pm, Friday, the 28th, is expected to be high in the following areas: Niigata Prefecture 150mm
Toyama Prefecture 180mm
Ishikawa Prefecture 150mm
Fukui Prefecture 120mm

Then, the predicted 24-hour precipitation from 6pm on Friday the 28th to 6pm on Saturday the 29th will be:
Toyama Prefecture 60mm
Ishikawa Prefecture 80mm
Fukui Prefecture 60mm

[Special heavy rain warning in Hokuriku] Take action to protect your life; the area of heavy rain will further expand tomorrow (commentary: weather forecaster Atsuko Miyake)

2026/08/27 14:06

Ishikawa and Toyama prefectures are experiencing heavy rain like they have never experienced before.



There are areas in Ishikawa Prefecture and Toyama Prefecture where a Level 5 heavy rain special warning has been announced.
There is a high possibility that some kind of disaster has already occurred.
Please take actions that are likely to save lives, even if just a little.



This is what the rain clouds look like.
From early morning until dawn today, linear rain clouds continued to cover Ishikawa and Toyama prefectures.
In Ishikawa and Toyama prefectures, information on the occurrence of linear precipitation bands has been announced one after another.
In addition, heavy rain is observed in Ishikawa Prefecture in the morning.

From morning until noon, the rain clouds are gradually moving southward.

Looking at the precipitation for the 12 hours up to 11 a.m.,
Hakui City, Ishikawa Prefecture, recorded 317.5mm of rain, and Himi City, Toyama Prefecture, recorded 317mm of rain.
Both values have updated the highest values in observation history.



Although the rain has temporarily stopped,
Please continue to exercise the highest level of vigilance in Ishikawa and Toyama prefectures until the evening.

Vehicle evacuation is dangerous.
During the heavy rains in Chiba the other day, some people were forced to drive into flooded areas, became stuck, and died in their cars.
Also, please avoid driving near flooded rivers.
In past heavy rain disasters, there have been cases where people were driving near a swollen river and were swept away by the swollen river.

If the flooding is progressing, evacuating may actually be dangerous.
Make sure to enter the river in a safe place, away from cliffs that are higher than the second floor of your house.



The cause of this heavy rain is the front.
Warm, moist air continues to flow toward this front from the south.
There is also a low pressure system with cold air in the upper atmosphere, and the atmosphere is expected to remain unstable, especially near the front.

Also in areas far from the front lines. Due to the damp air and cold air, very heavy rain is expected to occur in some places.



Rain cloud forecast.
Currently, the rain is temporarily weakening in some parts of the Hokuriku region, but
active rain clouds are expected to start covering the Hokuriku region again tonight.
It looks like it's going to rain heavily again.

Also, looking at northern Japan, heavy rain is likely to peak in Hokkaido during dark hours due to the passing of a low pressure system accompanied by cold air.

Tomorrow, linear rain clouds are expected to roll over from the Sea of Japan, across Hokuriku,
to the Kanto-Koshin region.

Please be on alert for heavy rain disasters from the Kanto region to the Hokuriku region,
and even northern Japan into tomorrow.



The predicted 24-hour precipitation by noon tomorrow (Friday) is
200mm in the Hokuriku region, 150mm in the Tohoku, Kanto-Koshin, and Tokai regions, 120mm in the Hokkaido and Kinki regions, and
100mm in the Chugoku region.

Furthermore, rainy conditions will continue after that, with 80mm of rain expected to fall in the Hokuriku, Tokai, and Kinki regions until noon the next day (Saturday).

However, if a linear precipitation band occurs,
there is a risk that the amount of rainfall will be even higher than this predicted amount.
Please continue to pay attention to the latest heavy rain information.



Rain and thunderstorms are expected to continue over a wide area into tomorrow.
Be careful of sudden rain or thunderstorms even in areas without an umbrella mark.
It looks like there will be some places with very heavy rain with thunder tomorrow.
If you hear thunder, try to get into a sturdy building.

In addition, Kyushu is expected to experience extremely hot days with temperatures exceeding 35 degrees Celsius into tomorrow.
Please continue to be careful of heat stroke.



Weekly forecast.
The weather is expected to improve in northern Japan on Saturday the 29th, but
the atmosphere will continue to be unstable from Hokuriku to the Tokai, Kanto-Koshin, and Kinki regions.

Also, the rain is likely to continue mainly in northern Japan and Hokuriku after the 30th (Sunday).
We need to be careful about the heavy rain that continues for a long time.

And from Kanto-Koshin to western Japan, it looks like there will be places that will experience another extremely hot day next week.
Please continue to be careful about the heat.