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Super Typhoon Hagibis threatens Japan

24

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  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    Hhagibis has made a much earlier turn north and even north-northeastwards by almost half a degree in the past few hours, despite the forecast of it continuing north-northwestwards for the next 24 hours (above). Satellite fixes at 16:20Z and 17:30Z were longitude 139.71E and 139.79E, respectively. The latest sat image at 19Z has it at around 139.90E, which is a difference of about 40 NM compared to where it should have been (around 139.20E)

    It seems more than just a wobble. Will it mean it will miss Japan completely? We'll see...

    16:20Z
    diag20191009T162010_amsr2_37.png

    17:30Z
    diag20191009T173000_GI.png


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    The JTWC say it's just a wobble and it will resume NNW-wards. Still, it's still heading NNE-wards and is now centred along 140.0E, almost 60 NM east of forecast. This is around the difference between landfall near Tokyo and completely missing land to the east.

    Weakening should begin in about 12 hours' time.
    WDPN31 PGTW 092100
    MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
    SUBJ/PROGNOSTIC REASONING FOR SUPER TYPHOON 20W (HAGIBIS) WARNING NR
    019//
    RMKS/
    1. FOR METEOROLOGISTS.
    2. 6 HOUR SUMMARY AND ANALYSIS.
    SUPER TYPHOON (STY) 20W (HAGIBIS), LOCATED APPROXIMATELY 798 NM
    SOUTH OF YOKOSUKA, JAPAN, HAS TRACKED NORTH-NORTHEASTWARD AT 08
    KNOTS OVER THE PAST SIX HOURS
    . ANIMATED ENHANCED INFRARED (EIR)
    SATELLITE IMAGERY REVEALS A 20 NAUTICAL MILE (NM) EYE, PROVIDING
    GOOD CONFIDENCE FOR THE INITIAL POSITION PLACEMENT. ADDITIONALLY,
    THE EYE IS SHOWING TROCHOIDAL MOTION OVER THE PAST 6 HRS. A 091619Z
    AMSR2 89GHZ IMAGE DISPLAYS CONCENTRIC EYEWALLS, HOWEVER THE CIMSS M-
    PERC PRODUCT IS NOT INDICATING A HIGH LIKELIHOOD OF AN EYEWALL
    REPLACEMENT CYCLE (ERC) OCCURRING AT THIS TIME. THE INITIAL
    INTENSITY IS BASED ON DVORAK CURRENT INTENSITY ESTIMATES OF 7.0 (140
    KTS) BY PGTW AND RJTD. FURTHERMORE, THERE IS A 090835Z SMAP IMAGE
    (40 KM RESOLUTION) WITH MAX WIND SPEEDS OF 128 KTS (1-MINUTE
    AVERAGE) THAT SUPPORTS THE CURRENT INTENSITY ESTIMATE. STY 20W HAS
    STRONG RADIAL OUTFLOW; THE POLEWARD OUTFLOW IS BEING FURTHER
    ENHANCED BY A TROUGH TO THE NORTHWEST OF THE SYSTEM. FURTHERMORE,
    THE SYSTEM IS SITTING IN FAVORABLE ENVIRONMENTAL CONDITIONS WITH
    WARM SST (29C) AND LOW VERTICAL WIND SHEAR (VWS). STY 20W IS
    CURRENTLY WOBBLING TO THE NORTH-NORTHEAST AFTER A SHIFT FROM A NORTH-
    NORTHWESTWARD TRACK OVER THE PAST 6-12 HOURS.
    3. FORECAST REASONING.
    A. THERE IS NO SIGNIFICANT CHANGE TO THE FORECAST PHILOSOPHY FROM
    THE LAST PROGNOSTIC REASONING MESSAGE. WIND RADII HAVE BEEN ADJUSTED
    BASED ON RECENT ASCAT-C AND SMAP DATA--THIS DATA CONTINUES TO
    INDICATE AN EXPANSIVE GALE WIND FIELD.
    B. STY 20W WILL TRACK NORTH-NORTHWESTWARD ALONG THE WESTERN
    PERIPHERY OF A DEEP-LAYERED SUBTROPICAL RIDGE (STR) THROUGH TAU 36

    WITH LOW VWS, WARM SST, AND STRONG UPPER-LEVEL OUTFLOW. STY 20W IS
    EXPECTED TO MAINTAIN INTENSITY FOR THE FIRST 12 HOURS DUE TO THE
    ENHANCED POLEWARD OUTFLOW. HOWEVER, STY 20W IS EXPECTED TO BEGIN A
    GRADUAL WEAKENING TREND AFTER TAU 12 AS THE TROUGH BEGINS TO
    INTERFERE WITH OUTFLOW. NUMERICAL MODELS REMAIN IN GOOD CROSS-TRACK
    AGREEMENT BUT POOR ALONG-TRACK SPEED AGREEMENT. AFTER TAU 36, A
    SHORTWAVE TROUGH WILL PASS OVER JAPAN, WEAKENING THE STR AND
    ALLOWING STY 20W TO BEGIN RECURVING. STY 20W WILL BEGIN EXTRA-
    TROPICAL TRANSITION (ETT) NEAR TAU 48. OVERALL, THERE IS GOOD
    CONFIDENCE IN THE OFFICIAL JTWC FORECAST IN THIS PORTION OF THE
    TRACK.
    C. AFTER TAU 72, VWS WILL INCREASE SIGNIFICANTLY, SSTS WILL DROP
    BELOW 24 DEGREES CELSIUS, FRICTIONAL EFFECTS FROM SKIRTING HONSHU
    WILL DISRUPT THE STRUCTURE, AND A LOW LEVEL NORTHEASTERLY COLD SURGE
    WILL BUILD IN TO THE WEST, ALL COMBINING TO CAUSE MORE RAPID
    WEAKENING. STY 20W WILL ACCELERATE NORTHEASTWARD AND COMPLETE ETT BY
    TAU 84 AS THE SYSTEM BECOMES EMBEDDED IN THE MIDLATITUDE WESTERLIES
    AND GAINS STRONG FRONTAL CHARACTERISTICS. NUMERICAL MODELS ARE IN
    FAIR CROSS-TRACK AGREEMENT AFTER RECURVATURE OF STY 20W. HOWEVER, AS
    THE SYSTEM ACCELERATES, ALONG-TRACK SPREAD GREATLY INCREASES THROUGH
    TAU 96. THE JTWC FORECAST TRACK IS PLACED NEAR BUT SLIGHTLY FASTER
    THAN THE MULTI-MODEL CONSENSUS AFTER TAU 72. BASED ON THE VARIATION
    IN MODEL TIMING OF THE RECURVE AND ALONG-TRACK SPEEDS, THERE IS LOW
    CONFIDENCE IN THIS PORTION OF THE JTWC TRACK FORECAST.//
    NNNN


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    Latest wv

    20191009.2100.himawari8.x.wv1km.20WHAGIBIS.140kts-905mb-220N-1398E.100pc.jpg


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    Iwo Jima, that first island around 190 NM to the northeast of the eye in the image below, is getting pretty windy now. Mean speed southeasterly 46, gusting 74 knots.
    METAR RJAW 092100Z 12046G74KT 3500 -SHRA BR FEW002 BKN005 OVC010 27/24 Q0990 RMK 2ST002 5ST005 8CU010 A2924=

    20191009.2110.hm8.x.ir1km_bw.20WHAGIBIS.140kts-905mb-220N-1398E.100pc.jpg


  • Registered Users Posts: 6,865 ✭✭✭pauldry


    Back on Northwesterly track and England France off.
    Also New Zealand Italy....denying Italy (a 71-3 loss)

    Irelands match will escape
    Scotland being monitored


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  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    It got worse on Iwo Jima. Gusta up to 94 knots

    https://www.ogimet.com/display_metars2.php?lang=en&lugar=Rjaw&tipo=ALL&ord=REV&nil=SI&fmt=html&ano=2019&mes=10&day=09&hora=06&anof=2019&mesf=10&dayf=10&horaf=15&minf=59&send=send
    METAR RJAW 100600Z 14055G94KT 1600 SHRA BR FEW002 BKN005 OVC010 25/24 Q0977 RMK 2ST002 5ST005 8CU010 A2888=


  • Registered Users Posts: 2,023 ✭✭✭Donegal Storm


    What's the chances of this actually affecting the Scotland game?


  • Registered Users Posts: 3,133 ✭✭✭Rebelbrowser


    What's the chances of this actually affecting the Scotland game?

    Storm will be well gone but if it causes lots of damage to transport etc then it will be cancelled. In fact, seeing as cancelling it puts Japan through as group winners I'd say the organisers will be only too delighted to do this! Italy have already been knocked out due to a match cancellation (they had a theoretical chance of going through still) so the precedent is now there. If I was Scotland I would be very, very afraid....


  • Registered Users Posts: 3,133 ✭✭✭Rebelbrowser


    Just looking at the latest guidance (below), it looks to me as though:-

    - this could still affect (but not cancel) the Irish match (see discussion on the yellow circle on the map below)
    - it looks to me as though when they are making a call on the Japan v Scotland match (6 hours before at latest) there could still be a decent wind blowing in Yokohama which must heighten risk of cancellation if the main part of the storm (landing ca. 24 hours before the match starts) is very strong and causes damage
    - Just comparing the latest guidance with the track predicted last night, there looks to me as though there has been a pronounced shift west in the predicted track. The further west it tracks the more it could affect the Ireland match and the later it arrives in Tokyo (heightening the risk of the Scotland game being cancelled)

    On the chart below the times are UTC (same time as Ireland right now) so Japanese times are +9 hours. Thus you can see that at 6am UTC on Saturday (3pm Japanese time) the storm is approaching Japan. At that stage, crudely, it is about 500km from Fukuoka where Ireland are playing at, I think, 8.45pm Japanese time. It then moves north east along the coast towards Tokyo / Yokohama and away from the Ireland match. Thus it should be 750km+ from the Irish match by kick off. Any further correction west in the track, or slowing down of its arrival time, could lead to a fair bit of wind and rain for the Irish match though. Not sure if there is a roof in the Fukuoka stadium?

    Current landfall near Tokyo seems to be slated for, crudely, 12 noon UTC / 9pm Japanese time on Saturday night. Looking at the diamater of the red cone (denoting the areas that can expect 50 nkot+ winds) and the diameter of the yellow circle (showing areas that can expect 30 Knot+ winds), it looks as though the winds may not abate below 30 Knots in the Tokyo area until the early afternoon on the Sunday, with the Japan v Scotland match kicking off at 8.45pm local time.

    all-00.png


  • Registered Users Posts: 15,944 ✭✭✭✭Villain


    Impressive size!

    20191010032000.jpg


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  • Registered Users Posts: 15,944 ✭✭✭✭Villain




  • Registered Users Posts: 3,133 ✭✭✭Rebelbrowser


    Latest update below. Track seems a little further east so can't see this having any effect at all on Irish match. Still a direct hit for Tokyo area with landfall ca. 9pm local time on Saturday night with gusts of 120 knots (thats 222km) at that time. That's serious stuff. Will be clear of Tokyo by the time of the Japan v Scotland the following night, but not that long clear and there is bound to be a lot of debris etc around. I'd say much more likely to be cancelled than not if this chart comes to pass....

    1919-00.png


  • Closed Accounts Posts: 1,981 ✭✭✭Naggdefy


    Not at all fair on the Scots if it comes to pass. But that's a discussion for the rugby forum.

    Is this typhoon of relatively unprecedented strength or common enough power?


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    Poor Iwo Jima's still getting battered by gusts up to 90 knots, and that's been going on for almost 24 hours (since 20Z yesterday).
    METAR RJAW 101500Z 17050G79KT 3200 -SHRA BR FEW002 BKN005 BKN010 26/25 Q0985 RMK 2ST002 5ST005 7CU010 A2911=
    METAR RJAW 101200Z 17057G90KT 2000 -SHRA BR FEW002 BKN005 OVC010 25/24 Q0982 RMK 2ST002 5ST005 8CU010 A2902=

    Latest track has it landfalling at 85 knots somewhere near Shimoda at 12Z on Saturday. Interaction with land should weaken it a bit before it hits Tokyo proper.

    wp202019.19101000.gif


  • Closed Accounts Posts: 3,378 ✭✭✭HighLine


    Villain wrote: »
    Impressive size!

    Stunning photo.. where do you find that imagery if you don't mind me asking?


  • Registered Users Posts: 586 ✭✭✭andymx11


    How long before the Ireland game can we guarantee it won’t hit that area?

    I assume the path can dramatically change and with that impact where Ireland are playing?


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    andymx11 wrote: »
    How long before the Ireland game can we guarantee it won’t hit that area?

    I assume the path can dramatically change and with that impact where Ireland are playing?

    If you were to read the Irish Mirror, etc., yes, it could, but in the real world there is practically zero chance of that happening.


  • Registered Users Posts: 1,922 ✭✭✭Reati


    Any chance there will be a red alert? Meant to be driving to work in the morning but worried now. Can someone please tell me when it's due to hit?

    /joke


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    There is a lot of dry air now wrapping around the storm. Weakening should be steady from now on.

    diag20191010T173000_GS.png


  • Registered Users Posts: 6,142 ✭✭✭munsterlegend


    Reati wrote: »
    Any chance there will be a red alert? Meant to be driving to work in the morning but worried now. Can someone please tell me when it's due to hit?

    /joke

    George lee doing a 3 hour morning special from 6am so maybe best to tune in.


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  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    Weakened to 125 knits now in the latest update as shear and dry air start to have an effect. update landfall a smidgen further easy again.


    201920W_wind_ssmis.gif


  • Registered Users Posts: 3,133 ✭✭✭Rebelbrowser


    But looks to be arriving a few hours later too which heightens risk of Japan match cancellation


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    But looks to be arriving a few hours later too which heightens risk of Japan match cancellation

    No, still around the same time as always. The latest JTWC has it 6 NM from Yokozuka (about 20 km south of Yokohama) at 13Z on Saturday.


  • Registered Users Posts: 3,133 ✭✭✭Rebelbrowser


    No, still around the same time as always. The latest JTWC has it 6 NM from Yokozuka (about 20 km south of Yokohama) at 13Z on Saturday.

    Is 13Z UTC or local?


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    Is 13Z UTC or local?

    UTC. Japan time us UTC + 10


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    The upper outflow bands are now well over Japan.

    20191010.2300.himawari8.x.wv1km.20WHAGIBIS.125kts-929mb-263N-1386E.100pc.jpg

    There is about a 150-NM tongue of much lower ocean heat content for the centre to cross in the final hours before landfall. We should see a very torn and semi-transitioned system by that stage, with the worst of the winds to the east of the large metropolis of Tokyo, Kawasaki and Yokohama.

    2019WP20_OHCNFCST_201910101800.GIF


  • Moderators, Recreation & Hobbies Moderators Posts: 11,042 Mod ✭✭✭✭igCorcaigh


    Is it going to hit Tokyo?


  • Registered Users Posts: 14,316 ✭✭✭✭M.T. Cranium


    Looks close to going over the southeast corner of Honshu, Tokyo may be on the northwest side of the circulation at its closest approach Saturday evening local time. Would imply weather conditions for Tokyo of northeast winds 70-120 km/hr with 20-50 mm rainfalls. Some places further south could see top gusts of 150 km/hr and 40-80 mm rainfalls. The eye might make a landfall but may just miss larger population centres by a few miles, obviously a bit far out to be that precise but the way it's recurving I think the chances are greater that it misses Tokyo south than a direct hit. That might not necessarily be a good thing, a similar typhoon made a direct hit last year I believe, and the interaction with mountains tends to fragment the rain shield and even the stronger winds at times, but a strong northeast wind would probably be less subject to disruption and the rain amounts to the north of these storm tracks can be more uniform (therefore not hit or miss).


  • Registered Users Posts: 6,865 ✭✭✭pauldry


    It will hit Tokyo with heavy rain and winds in the region of 70 mph. It would certainly be a Red day here at home.


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  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    The latest JTWC track has it right in Tokyo Bay at 12Z tomorrow at 80 kts. The main metropolis just a few miles to its NW. The 64-kt wind radii are only valid over open water, but gusts should still be in the 80-90-kt range.

    wp202019.19101018.gif

    The structure now shows it totally open on its southern side, though standard satellite imagery gives the false impression that it's still intact as it's only seeing the upper cirrus shield.

    37 GHz (shows low cloud and rain)

    diag20191011T035948_amsr2_37.png

    89 GHz colour (shows deep convection in red).

    20191011.0359.gcomw1.x.colorpct_89h_89v.20WHAGIBIS.120kts-927mb-274N-1380E.095pc.jpg

    Latest wind field shows max wind 104 kts 18 NM to the NE of the centre.

    2019WP20_MPSATWND_201910110600_SWHR.GIF


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