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Hurricane Lane impacts Hawaii


NJwx85

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Dropsonde from the northern eyewall. Value closest to surface is 148kts, however it doesn't say surface explicitly, so I'm going to assume its just above and something happened to it before it made splashdown. Normally it'll say (surface) in parenthesis if everything goes right. Even then, the value would almost have to be ~140kts. My guess for the 00z advisory is 140kt/928mb.

 

recon_AF306-0914E-LANE_dropsonde12_20180

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Just now, WxWatcher007 said:

I mean just look at the mean wind in the lowest 150 meters. Insane lol. Is it too much to ask for another center pass? :p  

I'd be surprised if it isn't upgraded in the next advisory. 

 

Product: Air Force Vortex Message (URPN12 KNHC)
Transmitted: 21st day of the month at 23:21Z
Agency: United States Air Force 
Aircraft: Lockheed WC-130J Hercules with reg. number AF97-5306 
Storm Number & Year: 14 in 2018
Storm Name: Lane (flight in the Northeast Pacific basin)
Mission Number: 9
Observation Number: 21 ( See all messages of this type for this mission. )



Remarks Section:
 

Maximum Flight Level Wind: 146kts (~ 168.0mph) which was observed 10 nautical miles (12 statute miles) to the NE (38°) from the flight level center at 22:41:00Z

I wish, but they've already stayed past their scheduled time and are probably running low on fuel.

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1 minute ago, WxWatcher007 said:

Latest advisory has Lane still at 155mph, with 929mb central pressure. Moving WNW at 10mph. 

Kinda surprised given that last recon pass, but oh well. 5mph isn't going to make a big difference in the impacts on Hawaii. 

but a cat 5  for historical reasons..

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Could be the opposite we saw with Irma or one of the Atlantic storms last year.  I remember NHC seemed to be keeping it stronger than it likely was because it was near land and they maybe did not want people to think a category lower was going to make things significantly better.  Here it might be they know its never going to landfall as a 3 4 or 5 so why freak people out more than they need to be several days out

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20 minutes ago, NJwx85 said:

 

I'll bet CPHC is a bit more used to relying on DT/ADT numbers than NHC (at least for the atlantic).  ADT numbers are still ~ 130 kt, which is probably why they are staying conservative.  Regardless of the official intensity, the actual intensity is what it is.  Their decision is a bit questionable, but the official forecast has no impact on what the actual intensity is.

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Just now, WxWatcher007 said:

The central pressure dropped around 10 mb between the 18Z and 00Z fixes, with the last eye dropsonde measuring 930 mb with 16 kt splash wind, yielding a minimum pressure estimate of 929 mb. Peak SFMR winds during this mission were 140 kt, and max flight level winds were 146 kt. Subjective Dvorak current intensity estimates range from 6.5/127 kt to 7.0/140 kt, with the latest ADT current intensity holding steady at 6.5/127 kt. Although the central pressure has dropped sharply during the last 18 hours, it is now about what one would expect for a hurricane of strong Category 4 intensity in the Central Pacific basin, and based primarily on the aircraft data the intial intensity is held at 135 kt for this advisory.

umm, sorry but that's just...not sufficient...

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24 minutes ago, the ghost of leroy said:

I didnt realize they're just regular WFO honolulu employees and not even tropical specialists...makes me want to pull my hair out AND empathize with them a little

Yea they’re definitely in over their heads here. Central pacific doesn’t deal with many strong cyclones, let alone ones that pose a threat to the islands. 

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