Today's 3rd (Constitution Day) weather: Clear skies across the country, making it a perfect day for excursions

2024/05/03 09:39

We have entered the second half of Golden Week. Today's pressure distribution will be such that a belt-shaped high pressure area will cover the vicinity of Honshu. As a result, the area around Honshu will have clear skies, making it a perfect day for tourists.

Today's predicted maximum temperature is expected to be 3 C or more higher than yesterday in many places across a wide area of Honshu. In particular, temperatures are expected to rise by 5c compared to the previous day in Tokyo and Tottori, and 6c in Sendai. When going out, please wear cool clothes such as short sleeves and stay hydrated.

The second half of Golden Week is full of summer weather, and there is a risk of strong rain and wind in western Japan on the final day.

2024/05/03 07:05

The second half of Golden Week begins today, the 3rd (Friday).

It will be mostly sunny today. The predicted maximum temperature is 25c in Sendai, Tokyo, Hiroshima, and Kagoshima, and there are likely to be places from Tohoku to Kyushu that will experience summer days. Please be careful of sudden rain and thunderstorms in Hokkaido, especially on the Sea of Okhotsk side.



Tomorrow 4th Looking at the weather and temperatures from Saturday (Saturday) onwards, it will be sunny across the country on the 4th (Saturday) and 5th (Sunday), and it looks like it will be hot for this time of year. Tokyo is expected to experience three consecutive summer days, with temperatures reaching 28c on the 4th (Saturday) and 27c on the 5th (Sunday) and 6th (Monday). There are many places from the Kanto region to the west where summer days reach temperatures of 25c or higher, so please be careful not to get heat stroke when going out.



6th (Sun) ), the weather is likely to go downhill from the west. Rain is expected to spread from Kyushu to Kinki. The southerly winds will strengthen towards the front, and there is a risk of heavy rain, so caution is required on the last day of Golden Week.

The longest Kuroshio meander in recorded history, sea surface temperature off the coast of Sanriku is up to 7c higher (April 21-27, 2024 Ocean Summary)

2024/05/02 16:08

It has been 6 years and 10 months since the Kuroshio Meander began, making it the longest period on record.

Ocean Summary April 21st to 27th, 2024.




# Pressure distribution and waves

On the 21st, a low pressure system developing in the east of Japan moved eastward.
Wave heights of 3 meters or more are widespread off the coast of Sanriku.

On the 22nd, a low pressure system accompanied by a front moved eastward along the southern coast of Honshu.
At night, the wave height was 3m near the Izu Islands.

On the 23rd and 24th, a frontal low pressure system moved eastward along the southern coast of Honshu.
On the Pacific side, wave height is around 2m mainly around the Izu Islands.

On the 25th, a developing low pressure system moved northeast off the coast of Sanriku.
Wave height over 3m from east of Kanto to off the coast of Sanriku.
In the waters of Japan, wave heights are around 3m around low pressure systems moving north.

On the 26th, a developing low pressure system reached the waters near Chishima.
Wave height around 2m off the southeastern coast of Hokkaido.

On the 27th, a front stalled in the south of Japan, and a low-pressure system above the
front moved eastward south of Kanto. At night, the wave height was 3m in the eastern Kanto region.



#Sea surface temperature

Towards the end of this period, areas with higher than normal sea conditions expanded in Japanese waters.

In the East China Sea and the vicinity of the Nansei Islands, the sea area continues to be at or slightly above normal.

On the Pacific side, the Kuroshio Current continued to meander, and the sea area continued to be slightly lower than normal from the coast of Shikoku to the coast of Shionomisaki, where the Kuroshio leaves the coast.

Off the coast of Sanriku, where the Kuroshio Current moves northward,
the sea area remained significantly higher than normal, with temperatures up to 7 degrees Celsius.

Off the southeastern coast of Hokkaido, where the Oyashio current has receded, sea levels have continued to be significantly higher than normal.

In the Sea of Okhotsk and the seas near Chishima Island, sea conditions continued to be similar to normal.

[1-month forecast] Summer is already in full swing. High temperature trend continues nationwide in May

2024/05/02 15:22

Today, the 2nd (Thursday), the Japan Meteorological Agency announced the ``1-month forecast'' for the period from May 4th to June 3rd.

Warm air tends to flow into May,
temperatures are expected to be high in eastern and western Japan and the Okinawa/Amami region, and
to be near or above normal in northern Japan.

Especially in eastern Japan, there are likely to be some places where
temperatures will be quite high from around May 4th to May 10th.

From early summer onwards, there are likely to be some places where it can be as hot as mid-summer, so
it is necessary to prepare for the heat from early on.



It's raining again The amount is expected to be at or above normal on the Sea of Japan side of northern and eastern Japan due to the effects of low pressure and moist air.

In Okinawa and the Amami region, rainfall is expected to be at or above normal
due to the influence of the front (rainy season front) and humid air.

Normally the start of the rainy season (last year, 2023 rainy season)
Okinawa region: around May 10th (around May 18th)
Amami region: around May 12th (around May 18th)

In a normal year This is the season when the rainy season begins in Okinawa and the Amami region.

It looks like the rainy season will begin in earnest in the southern regions this year as well.

Sunshine hours are expected to be similar to normal throughout the country.

Weather for the week: Rain from the west on the last day of Golden Week

2024/05/02 13:54

Tomorrow, from the 3rd (Friday) to the 5th (Sunday), the Honshu region is expected to be covered in high pressure and clear skies. It will be a good day for tourists.
However, temperatures are expected to rise, and there will likely be more summer days in the Tohoku region.







Especially on the 4th (Sat) and 5th (Sun), Kanto-Koshin It will be as hot as midsummer, especially in inland areas. The maximum temperature in Kumagaya is expected to be 29c.
Please be sure to take precautions against heat stroke when traveling to an unfamiliar destination or returning home.
In Okinawa and Amami, the rain will calm down tomorrow, the 3rd (Friday), but there will be some showers, and sunny spells are expected to peek through the clouds from the 4th (Sat.) to the 5th (Sun.).
In Hokkaido, tomorrow the 3rd (Friday) will be the passage of a low pressure system or a trough of atmospheric pressure, and even if the eastern and northern regions are sunny, there will be periods of rain, and from the 4th (Saturday) to the 5th (Sunday) there will be clouds. It will spread.

On the last day of Golden Week, the 6th (Monday), the weather was going downhill from the west.



With front line A low pressure system is expected to move through the Sea of Japan.
Rain will gradually spread from the west, mainly in Okinawa and western Japan.
A low-pressure system is developing, and there is a risk of strong southerly winds and locally heavy rain.
If you are planning to return home from an outing, it is best to plan with plenty of time.
Clouds are expected to spread over eastern and northern Japan.

And on the 7th (Tuesday), the end of Golden Week, it will rain all over the country, and there will be places where you will need an umbrella when commuting.



8th (Wed) ), The weather on the 9th (Thursday) will also be cloudy and rainy, so it might be a good idea to avoid piling up laundry during Golden Week.

Tomorrow [Temperature difference in one day is about 20c] Frost in the morning, summer heat in the afternoon in some places. Be careful of temperature difference in northern Japan

2024/05/02 12:53

Northern Japan will need to be especially careful about the temperature difference tomorrow, the 3rd (Friday, Constitution Day), when the second half of the long weekend begins.

Tonight through tomorrow morning, the skies will be covered by high pressure, so radiative cooling is expected to increase even at night, as heat escapes from the ground.

Especially in northern Japan, radiative cooling becomes stronger,
with many places with minimum temperatures in the single digits.





4c in Obihiro, 6c in Aomori and Morioka It will be cold enough to cause frost on fields and shrubbery.

Agricultural crops (potatoes, corn, apples, etc.) whose flower buds bloom during this period
must be carefully managed
.


However, the temperature rises during the day, with some summer days reaching around 20c in Hokkaido and northern Tohoku, and over 25c in southern Tohoku.

In Fukushima, the temperature difference during the day can be as much as 19c,
making it very difficult to choose what to wear.



Temperature and clothing Looking at the relationship between
, when the temperature drops below 8c, you will want a winter coat such as down.
However, when the temperature exceeds 25c during the day,
short sleeves and T-shirts are just the right temperature.

Generally speaking, it is said that a difference in temperature of 5 degrees Celsius changes the amount of clothing you wear.
It might be a good idea to wear clothes that you can take off and put on and take off 3 to 4 clothes tomorrow.

The moon approaches Saturn. Wake up early to observe the stars during Golden Week!

2024/05/02 10:15

The moon will approach Saturn at dawn on the 4th (Sat).

It can be observed from a low position in the sky in the southeast direction.

Because dawn breaks before both Saturn and the moon rise to a high position,
the sky will become brighter as time passes and they will no longer be visible,
itsuggest you start observing at about 3am.

Please observe in a well-open place in the southeast direction where you can see the low sky.

Also, the moon will approach Mars on the following day, the 5th (Sun).

However, this will be quite low in the sky, so it may be difficult to find.




For the next three days, high pressure will cover Japan, and many areas are expected to experience clear skies.

The temperature at dawn will be 13-17 C in many areas, and it will be a pleasant atmosphere even if you get up early.

If you are observing for a long time, it is a good idea to bring a light outer layer to keep your body warm.

Today's weather: Sunshine reaches a wide area; the weather is improving in the Kanto region as well.

2024/05/02 06:00

Today, the 2nd (Thursday), the area around Japan will be covered by a mobile anticyclone centered over the Sea of Japan, and it will be sunny over a wide area from northern to western Japan.

Some areas in the Kanto and Tokai regions where it is raining in the early hours of the morning
The weather is likely to slowly improve after this.

On the other hand, the Nansei Islands will be near a front,
and the atmospheric conditions will be unstable.

It will be rainy throughout the day,
with locally heavy rain and thunderstorms.

Depending on how the rain falls, there is a possibility of heavy rain reaching warning levels.
Please continue to be careful about landslides, flooding, and flooding of roads.



Looking at the forecast for the maximum temperature, it is expected that there will be many places where it will be comfortable, with Tokyo at 20c and Osaka at 22c.

However, the temperature in Sapporo is expected to be 21c, more than 6c higher than yesterday (Wednesday), and the temperature in Abashiri is expected to be 20c (same as early July), which is 13c higher than yesterday.

There are places in Hokkaido where the temperature is significantly higher than yesterday, so
Please be careful not to get sick due to the temperature difference.

Heavy rain near the front in Okinawa

2024/05/02 05:30

In the Okinawa region, the atmospheric conditions are expected to be unstable today, the 2nd (Thu) due to the influence of a front in the sea nearby.

*Heavy rain

Today, the 2nd (Thu) in the Okinawa main island region and the Sakishima Islands, heavy rain of up to 30 mm per hour is expected in some areas.

Please be careful of landslides, flooding of low-lying land, and rising river levels.

Depending on the degree of development of rain clouds, there is a risk of heavy rain of warning level.

Expected 24-hour rainfall until dawn tomorrow (heavy areas)
Okinawa main island region: 80 mm
Sakishima Islands: 70 mm

*Lightning

In the Okinawa main island region and the Sakishima Islands today, the 2nd (Thu)
In the Daito Islands region, please be careful of lightning, gusts of wind, and sudden heavy rain from tomorrow, the 3rd (Fri).

The end of Golden Week is a stormy situation nationwide.

2024/05/01 17:39

During the second half of Golden Week, from the 3rd to the 5th, many areas of the Japanese archipelago will be covered in high pressure and will be sunny.
Meanwhile, from the 6th (Monday) to the 8th (Wednesday), the last day of Golden Week, a developing low-pressure system is expected to move eastward from Northeastern China to the Sea of Japan.




For this reason, from the afternoon of the 6th (Monday) in western Japan, It has started to rain, and it is expected to rain nationwide on Tuesday the 7th, the end of Golden Week. Winds from the south will become stronger towards the center of the low pressure system, and there will likely be some places where it will be raining sideways.





Especially from the Tokai to the Kanto-Koshin regions, the timing of the heavier rain falls during commuting time. It may overlap with the obi. Please check the latest weather information as transportation may be affected in some cases.