CPAC: ISELLE - Post-Tropical

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Re: CPAC: ISELLE - Hurricane

#1121 Postby Yellow Evan » Thu Aug 07, 2014 10:29 pm

Kingarabian wrote:
Iceman56 wrote:I lowered the advisory intensity to 65 knots because the various RECON intensity estimate techniques in the 23Z pass gave 66 kt, 67 kt, and 68 kt, with 90% of a max flight level wind of 72 knots giving 65 knots. This made going with 70 kt in the 00z intensity a stretch, but we round up slightly for the sake of safety and likely undersampling. Since the pressure continues to rise slowly, and the satellite and radar presentations of the system looking increasingly sheared, I could not justify retaining the 70 knot intensity at 03z.

If you are finding that the CPHC webpage is slow, you should try hitting refresh. Many times we find that people are getting old info on the page because their browser is loading from the cache. There have been many times I've been on the phone with people insisting the page is old when I'm looking at the our page from the office and it's current. The goal here is to publish the complete advisory package by :45, but the discussion almost always goes last as we put together our thoughts. The package is not officially "late" until synoptic + 3 hour.

And yes, you better believe I am a pro-met. 8-)


Yeah ignore our bickering. :lol:

All this time I though you folks were a separate and independent center. Didn't know the CPHC was a branch from the NWS. I hope they increase the staff and offer some relief.

We also got confused with Genevieve when you folks left it at 40kts for quite some time when it appeared much stronger.



I'm curirous why you guys don't rely on ADT much. Granted, if you did, Iselle could have arguably been a TS earlier.
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#1122 Postby JonathanBelles » Thu Aug 07, 2014 10:45 pm

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#1123 Postby Kingarabian » Thu Aug 07, 2014 10:56 pm

JonathanBelles wrote:Evening Blog Post: http://jonathanbelles.com/2014/08/07/is ... s-annular/


Thank you for the good read.
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Re: CPAC: ISELLE - Hurricane

#1124 Postby Kingarabian » Thu Aug 07, 2014 10:59 pm

Iceman56 wrote:I lowered the advisory intensity to 65 knots because the various RECON intensity estimate techniques in the 23Z pass gave 66 kt, 67 kt, and 68 kt, with 90% of a max flight level wind of 72 knots giving 65 knots. This made going with 70 kt in the 00z intensity a stretch, but we round up slightly for the sake of safety and likely undersampling. Since the pressure continues to rise slowly, and the satellite and radar presentations of the system looking increasingly sheared, I could not justify retaining the 70 knot intensity at 03z.

If you are finding that the CPHC webpage is slow, you should try hitting refresh. Many times we find that people are getting old info on the page because their browser is loading from the cache. There have been many times I've been on the phone with people insisting the page is old when I'm looking at the our page from the office and it's current. The goal here is to publish the complete advisory package by :45, but the discussion almost always goes last as we put together our thoughts. The package is not officially "late" until synoptic + 3 hour.

And yes, you better believe I am a pro-met. 8-)


Judging from your past posts, you are very critical of the JTWC.
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#1125 Postby Alyono » Thu Aug 07, 2014 11:04 pm

still marching steadily at a 275 heading. The north side of the storm is filling in better
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Re: CPAC: ISELLE - Hurricane

#1126 Postby Cyclenall » Thu Aug 07, 2014 11:12 pm

Iceman56 wrote:I lowered the advisory intensity to 65 knots because the various RECON intensity estimate techniques in the 23Z pass gave 66 kt, 67 kt, and 68 kt, with 90% of a max flight level wind of 72 knots giving 65 knots. This made going with 70 kt in the 00z intensity a stretch, but we round up slightly for the sake of safety and likely undersampling. Since the pressure continues to rise slowly, and the satellite and radar presentations of the system looking increasingly sheared, I could not justify retaining the 70 knot intensity at 03z.

If you are finding that the CPHC webpage is slow, you should try hitting refresh. Many times we find that people are getting old info on the page because their browser is loading from the cache. There have been many times I've been on the phone with people insisting the page is old when I'm looking at the our page from the office and it's current. The goal here is to publish the complete advisory package by :45, but the discussion almost always goes last as we put together our thoughts. The package is not officially "late" until synoptic + 3 hour.

And yes, you better believe I am a pro-met. 8-)

I think this is the first time a met who is from a TC/hurricane center posted right after an advisory saying why such and such was done. The main thing I'm wondering is why Genevieve was left as a weak TS for a period a day or so before crossing the IDL when it looked to be 60 knots. The last forecast before crossing the IDL showed just a 5 knot increase to 120 knots in 24 hours when Gene looked to be a category 5 already...that confused me greatly as well. You should get a blue tag sometime.
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Re: CPAC: ISELLE - Hurricane

#1127 Postby Sanibel » Thu Aug 07, 2014 11:14 pm

The houses in Puna are not built to withstand hurricanes. They are mostly tropical type houses. Should be a rough night there. The people there are mostly not rich.
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Re: CPAC: ISELLE - Hurricane

#1128 Postby Equilibrium » Thu Aug 07, 2014 11:18 pm

Cyclenall wrote:
Iceman56 wrote:I lowered the advisory intensity to 65 knots because the various RECON intensity estimate techniques in the 23Z pass gave 66 kt, 67 kt, and 68 kt, with 90% of a max flight level wind of 72 knots giving 65 knots. This made going with 70 kt in the 00z intensity a stretch, but we round up slightly for the sake of safety and likely undersampling. Since the pressure continues to rise slowly, and the satellite and radar presentations of the system looking increasingly sheared, I could not justify retaining the 70 knot intensity at 03z.

If you are finding that the CPHC webpage is slow, you should try hitting refresh. Many times we find that people are getting old info on the page because their browser is loading from the cache. There have been many times I've been on the phone with people insisting the page is old when I'm looking at the our page from the office and it's current. The goal here is to publish the complete advisory package by :45, but the discussion almost always goes last as we put together our thoughts. The package is not officially "late" until synoptic + 3 hour.



And yes, you better believe I am a pro-met. 8-)

I think this is the first time a met who is from a TC/hurricane center posted right after an advisory saying why such and such was done. The main thing I'm wondering is why Genevieve was left as a weak TS for a period a day or so before crossing the IDL when it looked to be 60 knots. The last forecast before crossing the IDL showed just a 5 knot increase to 120 knots in 24 hours when Gene looked to be a category 5 already...that confused me greatly as well. You should get a blue tag sometime.



Has his hands full with this storm. :roll:
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Re: CPAC: ISELLE - Hurricane

#1129 Postby AdamFirst » Thu Aug 07, 2014 11:30 pm

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Re: CPAC: ISELLE - Hurricane

#1130 Postby Cyclenall » Thu Aug 07, 2014 11:39 pm

supercane4867 wrote:Impressive -80°C cloud tops showing up

*Image Loop Cut*

I was going to post hours ago this shot where there was a dark grey spot showing this close to HI which is not normal or maybe hasn't been seen yet in the AVN product. Here it is just for kicks:

Image

I haven't seen much national or international coverage of this hurricane here in Canada, not a mention in the time I watched. There is a lot of other news ongoing right now.

Equilibrium wrote:Has his hands full with this storm. :roll:

Hence the word "sometime" not "right now, do it!".
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Re: CPAC: ISELLE - Hurricane

#1131 Postby Yellow Evan » Thu Aug 07, 2014 11:41 pm

Cyclenall wrote:
supercane4867 wrote:Impressive -80°C cloud tops showing up

*Image Loop Cut*

I was going to post hours ago this shot where there was a dark grey spot showing this close to HI which is not normal or maybe hasn't been seen yet in the AVN product. Here it is just for kicks:

Image

I haven't seen much national or international coverage of this hurricane here in Canada, not a mention in the time I watched. There is a lot of other news ongoing right now.


IT's getting a decent amount of attention in the USA. More than 99% of all EPAC storms/
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#1132 Postby Alyono » Thu Aug 07, 2014 11:51 pm

I would not be surprised if recon finds this to be a bit weaker
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Re:

#1133 Postby Kingarabian » Thu Aug 07, 2014 11:54 pm

Alyono wrote:I would not be surprised if recon finds this to be a bit weaker

So you agree with the CPHC then.
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Re: CPAC: ISELLE - Hurricane

#1134 Postby Yellow Evan » Thu Aug 07, 2014 11:57 pm

Honolulu Civil Beat ‏@CivilBeat 58m
Hawaii: report price gouging. $25 for a case of water is crazy http://bit.ly/1viW1AH #Iselle #hiwx
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Re: Re:

#1135 Postby Alyono » Fri Aug 08, 2014 12:07 am

Kingarabian wrote:
Alyono wrote:I would not be surprised if recon finds this to be a bit weaker

So you agree with the CPHC then.


at the time I did not. However, I am waiting for the aircraft data before adjusting the winds
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Re: CPAC: ISELLE - Hurricane

#1136 Postby vrif » Fri Aug 08, 2014 12:12 am

Cyclenall wrote:** snip **

I haven't seen much national or international coverage of this hurricane here in Canada, not a mention in the time I watched. There is a lot of other news ongoing right now.


Out here in Vancouver, the local news has a small blurb about Iselle and Julio because of flight delays from YVR to Hawaii. That's all the coverage I have seen.
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#1137 Postby Yellow Evan » Fri Aug 08, 2014 12:14 am

Looks very elongated. Starting to doubt what recon will find.
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#1138 Postby Yellow Evan » Fri Aug 08, 2014 12:35 am

CPHC still yet to have a public advisory on their website from 3z. And the 6z advisory is nearing.

Edit: http://www.prh.noaa.gov/cphc/tcpages/ar ... 080237.php

CPHC site not working.
Last edited by Yellow Evan on Fri Aug 08, 2014 12:53 am, edited 1 time in total.
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#1139 Postby Yellow Evan » Fri Aug 08, 2014 12:45 am

Based on Reconrd thus far, this is probs a high-end TS.
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Re: CPAC: ISELLE - Hurricane

#1140 Postby Brent » Fri Aug 08, 2014 12:59 am

Clinging to hurricane status:

BULLETIN
HURRICANE ISELLE INTERMEDIATE ADVISORY NUMBER 32A
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI EP092014
800 PM HST THU AUG 07 2014

...ISELLE CHURNING TOWARD THE BIG ISLAND...


SUMMARY OF 800 PM HST...0600 UTC...INFORMATION
----------------------------------------------
LOCATION...18.9N 154.4W
ABOUT 70 MI...115 KM SE OF HILO HAWAII
ABOUT 280 MI...450 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 15 MPH...24 KM/H
MINIMUM CENTRAL PRESSURE...992 MB...29.30 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...

NONE.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A HURRICANE WARNING IS IN EFFECT FOR...
* HAWAII COUNTY

A TROPICAL STORM WARNING IS IN EFFECT FOR...
* MAUI COUNTY...INCLUDING THE ISLANDS OF MAUI...MOLOKAI...LANAI...
AND KAHOOLAWE.
* OAHU
* KAUAI COUNTY INCLUDING THE ISLANDS OF KAUAI AND NIIHAU.

A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED
SOMEWHERE WITHIN THE WARNING AREA. PREPARATIONS TO PROTECT LIFE AND
PROPERTY SHOULD BE RUSHED TO COMPLETION.

A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS.

INTERESTS IN THE NORTHWEST HAWAIIAN ISLANDS SHOULD MONITOR THE
PROGRESS OF ISELLE.

FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR
PRODUCTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN
HONOLULU HAWAII.


DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
AT 800 PM HST...0600 UTC...THE CENTER OF HURRICANE ISELLE WAS
LOCATED NEAR LATITUDE 18.9 NORTH...LONGITUDE 154.4 WEST. ISELLE IS
MOVING TOWARD THE WEST NEAR 15 MPH...24 KM/H...AND THIS MOTION IS
EXPECTED TO CONTINUE WITH SOME SLOWING IN FORWARD SPEED OVER THE
NEXT COUPLE OF DAYS. ON THE FORECAST TRACK...ISELLE WILL BE
MOVING ACROSS THE BIG ISLAND TONIGHT...AND PASSING SOUTH OF THE
SMALLER ISLANDS ON FRIDAY AND FRIDAY NIGHT.

MAXIMUM SUSTAINED WINDS ARE ESTIMATED TO BE NEAR 75 MPH...120
KM/H...WITH HIGHER GUSTS. WEAKENING IS FORECAST OVER THE NEXT 48
HOURS...BUT ISELLE COULD STILL BE A HURRICANE WHEN IT MOVES ONSHORE
IN THE NEXT FEW HOURS. ISELLE IS FORECAST TO WEAKEN TO A TROPICAL
STORM OVERNIGHT.

HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 35 MILES...55 KM...FROM
THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 185
MILES...295 KM.

THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 992 MB...29.30 INCHES.


HAZARDS AFFECTING LAND
----------------------
WIND...TROPICAL STORM CONDITIONS WILL IMPACT THE BIG ISLAND THROUGH
THE NIGHT...WITH HURRICANE CONDITIONS LIKELY IN SOME AREAS
OVERNIGHT. TROPICAL STORM CONDITIONS ARE EXPECTED OVER MAUI COUNTY
TONIGHT...AND FOR OAHU ON FRIDAY. TROPICAL STORM CONDITIONS ARE
EXPECTED FOR KAUAI COUNTY LATER FRIDAY.

RAINFALL...RAINFALL TOTALS OF 5 TO 8 INCHES...WITH ISOLATED MAXIMUM
AMOUNTS TO 12 INCHES...ARE EXPECTED ALONG THE TRACK OF ISELLE.
THESE RAINS COULD CAUSE LIFE-THREATENING FLASH FLOODS AS WELL AS
ROCK AND MUD SLIDES.
SURF...SWELLS GENERATED BY ISELLE WILL CONTINUE TO BUILD ALONG EAST
FACING SHORES TONIGHT. VERY LARGE...DAMAGING WAVES ARE EXPECTED ALONG
MAINLY EAST AND SOUTH SHORES THROUGH FRIDAY.

STORM SURGE...THE COMBINATION OF STORM SURGE AND THE TIDE WILL CAUSE
NORMALLY DRY AREAS NEAR THE COAST TO BE FLOODED BY RISING WATERS.
THE WATER COULD REACH THE FOLLOWING HEIGHTS ABOVE GROUND IF THE PEAK
SURGE OCCURS AT THE TIME OF HIGH TIDE...

BIG ISLAND WINDWARD AND KAU...1 TO 2 FT

SURGE RELATED FLOODING DEPENDS ON THE RELATIVE TIMING OF THE SURGE
AND THE TIDAL CYCLE...AND CAN VARY GREATLY OVER SHORT DISTANCES.


NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY...1100 PM HST.

$$
FORECASTER BIRCHARD
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