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WestPac cyclone - Lionrock


hawkeye_wx

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If you want to see something wild, check out the 10-day loop of the euro for the western Pacific region.  It has Lionrock moving southwest toward Okinawa, then reversing back northeast and strengthening into a strong typhoon.  Then, in a Sandy-like scenario, it gets caught by a digging upper low, turns northwest across Japan and gets launched all the way back across Manchuria and into eastern Mongolia.  The entire pattern from north Asia to Alaska looks like it suddenly reverses and flows backward.

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7 hours ago, hawkeye_wx said:

If you want to see something wild, check out the 10-day loop of the euro for the western Pacific region.  It has Lionrock moving southwest toward Okinawa, then reversing back northeast and strengthening into a strong typhoon.  Then, in a Sandy-like scenario, it gets caught by a digging upper low, turns northwest across Japan and gets launched all the way back across Manchuria and into eastern Mongolia.  The entire pattern from north Asia to Alaska looks like it suddenly reverses and flows backward.

Going to be in Tokyo next week for meeting, maybe I will get smacked by Lionrock, watching it closely, cool track.. EURO/GFS have it pretty strong as it move up towards Japan.

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I've been watching Lionrock very closely for the past couple of days. The consistency of the ECMWF solution coupled with the trend of other guidance towards it is certainly ominous. For now, it's a good compact little system. Looks like all systems go for strengthening to me, at least in the short term.

 

tga_irv_0200_4.jpg

 

WiMs0ZV.jpg

 

I've actually posted a blog recently largely focusing on Lionrock with updates coming in the comments section if anyone cares to give it a read.

Western Pacific Tropical Analysis: August 21, 2016

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Lionrock analyzed at 100 kts by JTWC

JTWC prognostic discussion Aug 24, 15z

Quote

 RECENT ANIMATED WATER VAPOR IMAGERY INDICATES 
THAT TY 12W HAS BEEN ABLE TO INSULATE ITSELF AND MAINTAIN RADIAL 
OUTFLOW DESPITE WEAKENING POLEWARD OUTFLOW AND CONVERGENT FLOW 
ASSOCIATED WITH THE BUILDING RIDGE TO THE NORTH. THE CURRENT 
INTENSITY IS ASSESSED AT 100 KNOTS BASED ON DVORAK CURRENT INTENSITY 
ESTIMATES RANGING FROM 5.0 (90 KNOTS) TO 5.5 (102 KNOTS). TY 12W IS 
TRACKING SLOWLY SOUTHWESTWARD ALONG THE EASTERN PERIPHERY OF THE 
WESTERN SUBTROPICAL RIDGE (STR).

 

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While some members of guidance did shift east, it looks to me that the ECMWF still has support for its general solution. As perhaps is expected, the EPS remains very dialed in with the operational's solution. The ECMWF/EPS solution did shift up the Honshu coast some though, so that trend is definitely something to watch.

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8 minutes ago, gymengineer said:

And just like that, the 18Z GFS returns to the capture solution albeit crossing northern Honshu this time. 

Noncapture is already east of the capture solutions by 48hrs. This has everything to do with how far east the storm goes in the short run.

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Now Typhoon Lionrock has been analyzed to be at the strength of 115 kt. This is impressive. JTWC forecast has 75kt before landfall on Aug 30, 00z. I am not sure if they are thinking it will weaken below 75kt before its landfall (after 00z August 30) on northern Japan. As has been mentioned before, Lionrock will be captured by a mid-latitude trough and rotate back in towards China eventually. This is reminiscent of Sandy. So it is a really weird situation.

 

4k9Yteo.png

Quote

 TYPHOON (TY) 12W (LIONROCK), LOCATED APPROXIMATELY 410 NM SOUTH OF
YOKOSUKA, JAPAN, HAS TRACKED NORTHEASTWARD AT 12 KNOTS OVER THE
PAST SIX HOURS. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY AND 
RECENT MICROWAVE IMAGERY DEPICT A COMPACT, STRENGTHENING CORE 
(APPROXIMATELY 60-NM DIAMETER EYEWALL) WITH A 28-NM ROUND EYE, 
WHICH PROVIDES HIGH CONFIDENCE IN THE CURRENT POSITION AND RECENT 
TRACK ACCELERATION TO THE NORTHEAST. ...
 HOWEVER, CORE CONVECTION REMAINS VIGOROUS 
AND DVORAK INTENSITY ESTIMATES FROM ALL AGENCIES HAVE MAINTAINED AT 
T6.0 (115 KNOTS). CONSEQUENTLY, THE CURRENT INTENSITY REMAINS 
ASSESSED AT 115 KNOTS ALTHOUGH POTENTIAL ERC AND DECREASING SATCON 
ESTIMATES OF 109 KNOTS MAY SIGNAL A WEAKENING TREND. 

 

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