Japan The coming Japanese snow season 2018-2019 Weather

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Sandy

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Well, it's only July, and the Japanese snow season for 2018-2019 is not that close, but there's been plenty of weather happening in Japan.

The 2017-2018 came to a fairly quick end, with the warmest max average March(16.9C) and April(22.1C) on record in Tokyo (and other places as well).
May and June were about average, while the first 10 days of July have been above average.
June was coolish for the first 3 weeks, but well above average for the rest.

The rainy season(the stationary boundary that moves north from Taiwan from about May) for Tokyo was very short (around 1.5 weeks instead of 3-4 weeks.

HOWEVER, in western Japan, and to the north in S. Korea and nearby areas of China, the rainy season was unusually strong.
A typhoon came through that area and western Japan this time last week, and brought with it "unprecedented" rain along the Japan mountainous areas from Kyushu to as far as Gifu Prefecture, just west of Nagano Prefecture, and in the Inland Sea and Shikoku (the smallest of the 4 large islands of Japan.

2018 floods.jpg


When described as "unprecedented", 364 millimeters (14.3 inches) of rain fell in two hours between 5 a.m. and 7 a.m. on Sunday 8th July in the city of Uwajima, in Ehime Prefecture on Shikoku island.
155 people have died with another 50+ missing, mostly in Hiroshima Prefecture.
Hiroshima city has had its highest July rainfall on record (475mm) in just the first 8 days of the month, and most of it in 3-4 days (or less)

Clearly the rain totals were exacerbated by orographic lift, as most of the rain was in the mountainous spine of Japan.

At this stage, there are NO pointers for the 2018-2019 snow season!!!! ;)
 

Crispy013

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Crazy numbers!

Here’s hoping for an early start to the coming season. Going to be in the mountains from the 29th Dec, so fingers crossed the switch gets an early test in December.
 
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skichanger

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Have just got back from 5 weeks working on my lodges. Crazy weather. Within 1 week I had the heater on and then was completely overheating. And no rain for a week in the rainy season and then 2 days of downpour.
 

LM

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Well, it's only July, and the Japanese snow season for 2018-2019 is not that close, but there's been plenty of weather happening in Japan.

The 2017-2018 came to a fairly quick end, with the warmest max average March(16.9C) and April(22.1C) on record in Tokyo (and other places as well).
May and June were about average, while the first 10 days of July have been above average.
June was coolish for the first 3 weeks, but well above average for the rest.

The rainy season(the stationary boundary that moves north from Taiwan from about May) for Tokyo was very short (around 1.5 weeks instead of 3-4 weeks.

HOWEVER, in western Japan, and to the north in S. Korea and nearby areas of China, the rainy season was unusually strong.
A typhoon came through that area and western Japan this time last week, and brought with it "unprecedented" rain along the Japan mountainous areas from Kyushu to as far as Gifu Prefecture, just west of Nagano Prefecture, and in the Inland Sea and Shikoku (the smallest of the 4 large islands of Japan.

2018 floods.jpg


When described as "unprecedented", 364 millimeters (14.3 inches) of rain fell in two hours between 5 a.m. and 7 a.m. on Sunday 8th July in the city of Uwajima, in Ehime Prefecture on Shikoku island.
155 people have died with another 50+ missing, mostly in Hiroshima Prefecture.
Hiroshima city has had its highest July rainfall on record (475mm) in just the first 8 days of the month, and most of it in 3-4 days (or less)

Clearly the rain totals were exacerbated by orographic lift, as most of the rain was in the mountainous spine of Japan.

At this stage, there are NO pointers for the 2018-2019 snow season!!!! ;)
Thanks Sandy for the post
I was googling just how much rain fell with no luck. Then I thought check this forum...bingo.
Sad so many lives lost and the destruction. We toured the Okayama area in January before heading to the slopes.
Cheers
 

Sandy

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Thanks Sandy for the post
I was googling just how much rain fell with no luck. Then I thought check this forum...bingo.
Sad so many lives lost and the destruction. We toured the Okayama area in January before heading to the slopes.
Cheers
Some places had more than 1000mm in 3 days. I've seen more than 200mm overnight in Yokohama at times, but these figures for western Japan are staggering.
 

andrew7

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Nasty weather indeed. We're coming over the first week of October mainly to trek the Kumano Kodo trail. Never been to Japan out of ski season so will be very interesting. Any ideas on what weather we can expect then Sandy san?
 

LMB

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Insane amounts of rain.
And knowing the peaks and valleys and settlements within those valleys around Hiroshima - eek! That’s one hell of a funnel.
 

Sandy

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Nasty weather indeed. We're coming over the first week of October mainly to trek the Kumano Kodo trail. Never been to Japan out of ski season so will be very interesting. Any ideas on what weather we can expect then Sandy san?
Weather's usually good in Japan then. Typhoon season is mainly over. No longer hot summer temperatures.
 

Sandy

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Well, it's only July, and the Japanese snow season for 2018-2019 is not that close, but there's been plenty of weather happening in Japan.

The 2017-2018 came to a fairly quick end, with the warmest max average March(16.9C) and April(22.1C) on record in Tokyo (and other places as well).
May and June were about average, while the first 10 days of July have been above average.
June was coolish for the first 3 weeks, but well above average for the rest.
;)
Ok, so it's been hot since the rainy season finished in Tokyo around the 20th June (about 3 weeks early and 3 weeks shorter than usual). There a stationary boundary that moves from The Philippines in around April, gradually north to hit Japan in June..... this is the "rainy season" or "Tsuyu".
On the southern side is warmer air, northern side is warmer air.
2018-06-04 Rainy Season.png

However, the temperatures in late June until now have been well above average.

Since late last week, there's been a heat wave, 5 people have died, 1500 hospitalised. The deaths occurred in six prefectures: Toyama, Shizuoka, Tottori, Hiroshima, Oita and Kumamoto, which saw temperatures between 33.5 and 37.4, some of which are in last week's flood areas, which may be a contributing factor (homes destroyed, no A/C, etc)
Elsewhere, Kyoto, Gifu and Mie prefectures saw the mercury top 38. Tajimi in Gifu Prefecture got to 38.7 degrees, and is often the hottest place in Japan. These are more like August temperatures, when usually we get maximums of 30-35 every day, and lows above 24-26 every night.

While the temperatures are not super high by Aussies standards, it's the humidity that is the problem, plus the fact that it never gets cool at night. For example, Tokyo this morning at 8.52am, it's topped 33 degrees, 69% humidity.
Yokohama was 30.0 at 8am, 74%, after a low of 26.7

It gets so hot in Japan because of the Kurushio current.
asianmap-mp4-1.jpg


It flow further south in winter, but comes very close to the Pacific coast in summer, at around 26 degrees in summer.
Kurushio current October 2017.jpg

I think that it's possible that this eddy is partially responsible for last winter's strong early snow season in central Japan, but possibly also the cause of the early warming in late Feb and through March.
@Sandy any correlation in terms of local folklore between the weather seen this rainy season/summer and winter prospects?
 
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LMB

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I think that it's possible that this eddy is partially responsible for last winter's strong early snow season in central Japan, but possibly also the cause of the early warming in late Feb and through March.
That’s an interesting thought. :thumbs:
It was a very definite start and finish last season. I got told off for calling it “essentially over” in early March, but it just felt like April/May.
 

Sandy

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Nagoya forecast for the next week:
37,38,37,36,36,36,36
And 36.9 yesterday, and 38 today.

Nearby in Gifu, Tajimi backed up a 38.7 yesterday, with a 39.0 today.

It's possible that we could see a 40 sometime this week.... the humidity is a killer.
 
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hotsaki

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Here in Darwin 30C and 30 % humidity.Wet season can be 36C and up to 99% humidity.But we find it toughens us up and gets us ready for the cold.Plus we have cold beer in the fridge
 
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Sandy

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Here in Darwin 30C and 30 % humidity.Wet season can be 36C and up to 99% humidity.But we find it toughens us up and gets us ready for the cold.Plus we have cold beer in the fridge
Can be same here in Japan....
But average max for Darwin in the rainy season seems to be about 30C, and 70% humidity at 3pm.
So far the average max this July in Tokyo is 32.1C, while the long term average for first half of July is normally around 28C.
Yesterday, Tokyo got to 34.8, minimum humidity, 66%.
This is more like August than July. I wonder what it will be like next month!!

Even Nagano city has averaged 31.5C(418m elevation), and Matsumoto 31.2C (610m) in July.
Nagano city yesterday, 34.8C, and Matsumoto 35.0C.
Hakuba (703m) had a top of 31.9C yesterday. Nozawa Onsen 31.5C.

You can see why the snow melts down to nothing so quickly in Japan!!!!
 
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Sandy

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Nagoya forecast for the next week:
37,38,37,36,36,36,36
And 36.9 yesterday, and 38 today.

Nearby in Gifu, Tajimi backed up a 38.7 yesterday, with a 39.0 today.

It's possible that we could see a 40 sometime this week.... the humidity is a killer.

Well, Tajimi got to 40.7C at 2:30pm today!!!
Nearby Mino got to 40.6
 

mannyk

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We left Darwin because of weather like that, but thats hotter... yuck.. We used to go fishing 2am 28 deg, and sweating putting ice in the esky. I think I will stick to Winter in Japan thanks.
 

Sandy

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Bloody relentless here in Japan.....

Forecasts for the next 7 days:
Tokyo: 35,35,36,37,36,35,34 (and minimums 27,27,27,27,26,27,26)
Nagoya: 36,35,36,38,38,37,36
Osaka: 37,35,35,37,37,37,37
 
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Sandy

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These slow moving patterns in Japan and Europe at the moment are so different to anything we see in SE Australia. Usually just a few days then a front or wind change. None of this weeks-on-end stuff
This is normal August weather in Japan, not July (well, maybe 2-3 degrees above a normal August). But pretty much it's between 29-35C every day in August, and never gets below 24 at night.

The Kuroshio Current is mostly responsible for those consistent August temperatures, not the wind.
 

LMB

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Bloody relentless here in Japan.....

Forecasts for the next 7 days:
Tokyo: 35,35,36,37,36,35,34 (and minimums 27,27,27,27,26,27,26)
Nagoya: 36,35,36,38,38,37,36
Osaka: 37,35,35,37,37,37,37
That’s pure evil.
 

Sandy

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30+ people have died in Japan during this heat wave.
Yokohama 9am currently 32.9, 66% humidity.
Tokyo 34.5, 61%. Forecast top 36.

In Kyoto, it's exceeded 38C degrees for 7 consecutive days.
 

mannyk

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30+ people have died in Japan during this heat wave.
Yokohama 9am currently 32.9, 66% humidity.
Tokyo 34.5, 61%. Forecast top 36.
Thats bloody horrible..deaths and weather... Im assuming elderly folk in country areas are feeling it most. Must be difficult to climate control older homes for the weather that Japan gets. I saw a doco on NHK recently that 90+ % of schools in cities such as Tokyo have AC where country areas have very little. I would imagine its the same for homes. Being a ex Darwin boy I know how debilitating high humidity can be..I grew up with no AC at all, Now every home has AC.
 

Sandy

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Thats bloody horrible..deaths and weather... Im assuming elderly folk in country areas are feeling it most. Must be difficult to climate control older homes for the weather that Japan gets. I saw a doco on NHK recently that 90+ % of schools in cities such as Tokyo have AC where country areas have very little. I would imagine its the same for homes. Being a ex Darwin boy I know how debilitating high humidity can be..I grew up with no AC at all, Now every home has AC.
Every home has A/C. I think there's an issue for the people displaced from their homes in the floods two weeks ago...

But you also have to get out and about to shop for food.
 

mannyk

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Every home has A/C. I think there's an issue for the people displaced from their homes in the floods two weeks ago...

But you also have to get out and about to shop for food.
Good point, a bad combination of events.
Its very hard to imagine Japan with that weather, such a contrast to winter. You explained to me before how the ocean currents have a big effect from tropical to snow. I still find it amazing.
I wont be visiting anytime soon this time of year..
 

Sandy

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The humidity has dropped a bit today, but temperatures have increased.
Midday:
Yokohama : 35.2C, 46%
Tokyo : 37.4C, 38%
Nagoya : 39.2C, 33%
Kyoto : 37.3C, 40%

Tajimi : 39.0 (Gifu Prefecture)
Kamisatomi : 39.1 (Gunma Prefecture)
Kumagaya : 39.3 (Saitama Prefecture)

I think it's possible that Japan may pass its official all time high temperature of 41.0C today.
Prime candidate is Tajimi, and the other Prefectures above.
 

Sandy

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Up to 1 pm:
Yokohama : 36.3C, 38%
Tokyo : 38.3C, 38%
Nagoya : 39.2C, 31%
Kyoto : 38.3C, 38%

Tajimi : 40.5 (Gifu Prefecture)
Kamisatomi : 39.6 (Gunma Prefecture)
Kumagaya : 40.1 (Saitama Prefecture)

It hasn't rained in Tokyo for about 2 weeks, which is unusual.
 

PMG

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Looks like Tajimi will surpass 41 looking at those 1 pm readings. Any sign of a break in the heat coming up?
 

Sandy

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Up to 2 pm:
Yokohama : 37.2C, 39%
Tokyo : 39.0C, 41%
Nagoya : 39.6C, 30%
Kyoto : 38.4C, 36%

Tajimi : 40.7 (Gifu Prefecture)
Kamisatomi : 39.6 (Gunma Prefecture)
Kumagaya : 40.7 (Saitama Prefecture)

Western area of Tokyo, Ome, reached 40.8C around 1:30pm.
 
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