Jeanne looks Weak on satellite

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Anonymous

Jeanne looks Weak on satellite

#1 Postby Anonymous » Thu Sep 23, 2004 8:04 pm

From looking at the satellite, looks like Jeanne has lost most of her convection--still a very well defined eye but overall, not much in the way of high tops-No reds-few oranges-just mostly Blues and some Yellows... Does this mean that there is little Precip ocurring with this storm and its mostly just wind?

http://www.ssd.noaa.gov/PS/TROP/DATA/RT ... -loop.html
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Scorpion

#2 Postby Scorpion » Thu Sep 23, 2004 8:05 pm

That would be very good... Dont need the rain lol.
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#3 Postby NJCane » Thu Sep 23, 2004 8:07 pm

There is some heavier precip, but not a ton right now. The winds at flight level most likely do not reduce to 90% since there is not heavy precip to pull the strong winds down. Winds currently probably less than 105. However this will be brief and the reason is simply that the cane is running over its upwelling from the past few days.
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#4 Postby Hurricane Cheese » Thu Sep 23, 2004 8:07 pm

I believe the reason for Jeanne's cooler cloud tops is that she is currently over cooler SSTs.

The warm mid-80s SSTs are closer to the bahamas. When she reaches those she may explode ala Ivan when he hit the GOM eddy...!
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djti

#5 Postby djti » Thu Sep 23, 2004 8:08 pm

yes..definitely showing signs of her very dry environment......
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#6 Postby Brent » Thu Sep 23, 2004 8:11 pm

She's over her own cooled waters right now. As she gets into the Bahamas... the water temps are much warmer.
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Scorpion

#7 Postby Scorpion » Thu Sep 23, 2004 8:13 pm

They said that about Frances too.... but nope.
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NorthGaWeather

#8 Postby NorthGaWeather » Thu Sep 23, 2004 8:17 pm

Scorpion wrote:They said that about Frances too.... but nope.


They said what about Frances?
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Scorpion

#9 Postby Scorpion » Thu Sep 23, 2004 8:19 pm

That it would strengthen once it gets into the warm water.
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djti

#10 Postby djti » Thu Sep 23, 2004 8:20 pm

frances faced 10kts of westerly shear and moist environment

jeanne faces little shear (for at least the next 48 hours) and a very dry environment...

wonder how it plays out.
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Anonymous

#11 Postby Anonymous » Thu Sep 23, 2004 8:21 pm

Frances DID get a little better organized, BUT dry air and westerly shear was a factor. This one will not have dry air (NOT LIKE FRANCES) and WILL NOT have strong shear like Frances.
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#12 Postby NorthGaWeather » Thu Sep 23, 2004 8:23 pm

Frances wasn't in moist air. Dry air and shear took Frances out. If you remember when she was over the Gulf stream she fired up.
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djti

#13 Postby djti » Thu Sep 23, 2004 8:24 pm

rh's once frances moved towards the bahamas were fairly high.......it was all shear not allowing the inner core to reform.......no eyewall.

i did just read some reports noting the dry air in frances......still think it mostly was due to shear.....either way....im pretty sure that in previous discussions the NHC has made mention of the dry environment that jeanne is/willbe in.
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#14 Postby Hurricane Cheese » Thu Sep 23, 2004 8:32 pm

Shear is what killed Frances.

No shear is anticipated with Jeanne.

NHC indicates a favorable environment until landfall once it reaches the warm SSTs.

Remember what Ivan did when he reached the eddy!!!!!
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Scorpion

#15 Postby Scorpion » Thu Sep 23, 2004 8:34 pm

Ivan didnt gain strength in the eddy, and was 130 mph at landfall, significantly weaker than the 145-150 he was before the eddy.
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#16 Postby djti » Thu Sep 23, 2004 8:36 pm

he never got that high again...but he did drop from around 941 before the eddy....down to 930 or so during.......who knows if thats why....but i do know that the difference in the storm from the morning of landfall to the afternoon was extreme......eddy? who knows...much like the "gulf stream" the now famous "eddy" is something thats probably a little overplayed.
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#17 Postby Brent » Thu Sep 23, 2004 8:39 pm

The problem is... Frances peaked at Cat 4 way east of The Bahamas. Jeanne hasn't yet.
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#18 Postby Hurricane Cheese » Thu Sep 23, 2004 8:43 pm

Yes, I'm more referring to the mb drop Ivan had when he reached the eddy.

Ivan dropped about 10 mb over the course of an afternoon. However he didn't allow the time for the winds to really catch up, as he was 135 mph when he crossed the eddy down to 130 mph at the coastline.

But the mb drop was significant, and will be something to watch for w/ Jeanne.
Last edited by Hurricane Cheese on Thu Sep 23, 2004 8:45 pm, edited 1 time in total.
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#19 Postby OtherHD » Thu Sep 23, 2004 8:45 pm

~Floydbuster wrote:Frances DID get a little better organized, BUT dry air and westerly shear was a factor. This one will not have dry air (NOT LIKE FRANCES) and WILL NOT have strong shear like Frances.


Jeanne won't have dry air? Have you looked at a water vapor loop?
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#20 Postby clueless newbie » Thu Sep 23, 2004 8:45 pm

Ivan looked pitiful choked with dry air before reaching the eddy. He gained almost Cat5 look there, stopping the weakening trend. If there was no eddy, he would have been week Cat2 at landfall at best.

Frances was sheared badly and lost organization. It took her ages to reorganize, fortunately she got her act together just before the landfall, so she did not have time to strenghten.

Jeanne has very good structure, but she is choked by dry air. No shear at all visible. With good structure, she could intensify quickly if favorable conditions occur (warmer water, more moisture in surrounding air). At this moment, it is impossible to predict how strong she would be. Given her history of surviving in difficult conditions, it is very likely she will be remembered in Florida or whenever she landfalls again.
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