MikeC
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12:20PM EDT 9 September Update
Gabrielle has made landfall near Cape Lookout National Seashore around 11;45AM.
The wave northeast of the Caribbean is now being tracked as 92L being discussed here.. 1 Storm, 3 invests being tracked now.
The most immediate concern, outside of Gabrielle, is 90L in the Gulf, but it doesn't look like it'll develop much. 92L initial model runs suggest it is something that we in Florida and the southeast may have to watch later in the week.
9:38AM EDT 9 September Update
We're recording Mark Sudduth's (Hurricane Track.com) webcam tower on Hatteras along with the Morehead city radar.
You can see these At this link.
Also the Central Atlantiic (Discuss Here) and Gulf disturbance (being talked about Here) are being tracked as 91L, and 90L respectively.
Early 9 September Update
Late in the afternoon on Saturday (Sept. 8), Gabrielle was judged to have acquired tropical characteristics and was re-classified as a tropical storm. It should make landfall along the east coast of North Carolina sometime during the day on Sunday, heading north and northeast from there. Briefly gusty winds and 1-3" rain totals look to be the biggest meteorological effects from the poorly-organized tropical system; beach erosion looks to be the largest overall effect.
The disturbance in the Gulf of Mexico was designated as 90L late on Saturday. It is currently very disorganized and is no imminent threat for development. We'll watch it for now, along with a couple of tropical waves/lows in the central Atlantic. If you'd like to discuss any of these features for now, please check the Storm Forum and/or the Forecast Lounge.
8 September Update
Gabrielle remains a Subtropical Storm with 45MPH winds and a pressure of 1011 mb, there are some signs that Gabrielle may make the transition to a fully tropical storm later today or tonight.
The system is still rather disorganized as a whole, which should keep strengthening to a minimum, but it is forecast to become a stronger Tropical Storm by the time it nears the Carolina Coastline. Although it has some rain on the northern periphery, this is not a rain heavy system, a lot of dry air has gotten into Gabrielle. So it won't be much of a drought buster for the Carolina's unfortunately.
It is forecast to clip or barely miss the Carolina coastline then head northeast,
Original Update
Gabrielle forms as a subtropical Storm.
The system southeast of the Carolinas has formed into a Subtropical storm. It was borderline most of the night as is. Meaning warm core at lower levels and cold core at higher levels, a hybrid system, not purely tropical.
Gabrielle formed from an old frontal boundary that developed a low level circulation, meandered around for days, getting sheared and kept from forming a purely tropical system.
Tropical Storm watches are up from South Carolina Northward into parts of North Carolina. Gabrielle is forecast to near the coast of the Carolinas. Subtropical storms tend to have larger wind fields than tropical storms.
Radar Loops
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typhoon_tip
Meteorologist
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Subtropical declaration is quite fitting for this feature considering my own concerns recently posted in the 99L thread in the Storm Forum. It's interactions with the have led directly to its evolution in this regard, with additional aspect being a tremendous feed of dry air.
The question now becomes, will it complete phase transition and become purely tropical? Timing landfall will be critical in determing that... If it moves quickly toward the Coast and comes onboard than naturally it will only transition into a non-entity. If moves slower than modeled and remains seaward for long period of time, than it will be sitting over some of the hottest waters (Gulf Stream) in the Atlantic Basin and a transition will likely occur.
Edited by typhoon_tip (Sat Sep 08 2007 02:58 AM)
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punkyg
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Loc: sanford, florida
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Now that Subtropical gabrielle has formed and we now think we know where its going. we can all talk about how strong it will get and if it can become fully tropical.
I say this storm will make it up to 55mph before landfall
and i think it will stay subtropical.
And i think the track might be bumped up higher.
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HanKFranK
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it'll probably be a tropical storm sometime tomorrow. at some point in its life cycle it ought to become a hurricane. the north carolina track looks good as typically everything threatening the eastern seaboard aims for north carolina. much can't be said for it aside from that, as the upper low that dived on it was not well predicted by the models, and that prevented it from getting organized mid-week. it still came to be anyhow, since the synoptic forcing nearby outweighed smaller-scale negative factors.
that little blip in the gulf has some of the less reliable models biting. all it takes is a good mcc to get something that can actually start rolling to appear. whether it organizes or not, more rain for texas. sure they're looking forward to that.
no invest on it, but the wave that's nearing the cape verdes has a lot going for it in terms of development chances. most all of the models recurve it early with casual disregard. sooner it develops, better the chances.. there's a significant weakness between newfoundland and the azores.
we're almost to the season midpoint and on storm seven now. la nina years usually stay active late, but things are really trailing (and global scale factors don't seem ready to fall into place) for this season to end as hyper-active. it looks like above normal numbers but not extreme in terms of raw count, but those two category fives really spiked the monthly ntc/ace index numbers. on dean and felix alone we ought to have most of a full season's worth of activity.
speaking of felix, the death toll in coastal nicaragua is significant. there weren't a whole heck of a lot of people living where it made landfall, but it looks like it got a lot of them.
HF 0514z08september
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scottsvb
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Im surprised they made this a Subtropical storm. I mean sooo the winds between the high and weak low are near 40mph and 45 is gracious..but this is a weak 1011mb low with winds generally around 25mph. I say it will get alittle better organized but if it gets over 50mph...it will be a surprise. Shear from the unseen shortwave trough and dry air really done in this low.
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flahurricane
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On the latest IR images of SubTS Gabrielle it looks like the center of circulation is located at 30N 75W and moving very slowly westward. A lot of the thunderstorm activity has dissapated tonight and any that still exists is to the very north and east of the center. At 2am estimated the center to be at 30.5N 72.5W. Now that the center is more visible on satellite images I will be interesting to see if convection increases tonight and whether or not Gabrielle becomes a true tropical storm.
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dem05
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Interesting to see that Gabrielle was able to pull itoff development wise. I really can't see anything to add Gabrielle wise.
There's been mention in several postson this thread...as well as the previousone on a possiblesystem developing in the GOMex. This might be feasable. If development starts to take shape...that may happen north of the western tipof Cuba and/or west of the Dry Tortugas in the FL Keys. The overall streering currents show a ridge over the Houston area at this time. This would likely block any westerly motion for the time being...and with few other places to go...I would suspect that any disturbed weather of a tropical nature will basically meander around the SE Gulf for the next 2 days. Something to watch...but at this time...the models aren't all that excited about developing something just yet.
Steering Layer (700-850mb levels): http://cimss.ssec.wisc.edu/tropic/real-time/atlantic/winds/wg8dlm1.html
Steering Layer (500-850mb levels): http://cimss.ssec.wisc.edu/tropic/real-time/atlantic/winds/wg8dlm2.html
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Ed in Va
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Looks like it's getting a little better organized, with some convection over the center of circulation:
http://www.ssd.noaa.gov/goes/flt/t3/loop-rgb.html
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Survived Carol and Edna '54 in Maine. Guess this kind of dates me!
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MM
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Hi all from a newcomer... ;-)
Just wanted to ask the gurus here, what they think about a wave about 10N 33W SW of Capverde Islands. If memory serves me right, that's about the birthplace of "Dean".
Also 5N 33W looks interesting. I'm looking at that corner for a while now...
Just interested about your crystal glass...
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Lamar-Plant City
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Loc: Plant City, Florida
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I have a question.....looking at the following Water Vapor loop, there looks to be a small low pressure-type swirl that has broken off from the Gabrielle system and is moving west toward the Daytona Beach area. Can anyone clue me in as to what this is about? Is it a residual from Gabrielle, or something else popping up.
Florida Water Vapor Loop 14:45Z
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If you don't like the weather, wait 5 minutes...
2023 Season Prediction: 17/6/2
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scottsvb
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This storm is on forecast over the last week. Its been straight up with the rest of the season. Only thing was the shear that wasnt forecasted although I did notice the shortwave and said it probably wont get to hurricane strength..but then again..I went against the ships intensity forecasts. Anyways a path near the Outerbanks and then NNE-NE into the N Atlantic. Some TS force winds can be expected over the outerbanks..but inland expect just some breezy conditions in a feeder band.
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weather999
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Question here:
If a Subtropical Storm managed to have winds of hurricane force or stronger, would it become a Subtropical Hurricane, or stay as a Subtropical Storm, but with hurricane (red font on ) status? Is it even feasible to say that a Subtropical System in the Atlantic could reach hurricane strength... and can/do SubTSes form in the E. Pac? Thanks.
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Wxwatcher2
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Other than a minor wind event for the outer banks area of North Carolina, I don't see "extratropical Gabriel" as anything to pay attention to.
What baffles me is why did the use up a name on this storm? Has it been done before? I just don't recall an extr-tropical whatever being named previously.
A good tropical depression then should get a name in the future if we go by this thinking.
I continue to be a happy camper that the season for remains free from threats.
Life is good.
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weather_wise911
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Quote:
Other than a minor wind event for the outer banks area of North Carolina, I don't see "extratropical Gabriel" as anything to pay attention to.
What baffles me is why did the use up a name on this storm? Has it been done before? I just don't recall an extr-tropical whatever being named previously.
It's Subtropical... not .........
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cieldumort
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Looks like there have been some good questions posted on this thread that arguably relate to the topic of Gabrielle.
A lot of confusion exists, even among mets, as to the nature of sub-tropical cyclones, and debate has existed to greater or lesser degrees for decades as to whether or not to include them in the historical count, and later, whether to go ahead and draw down names from the seasonal list and apply such a formal tracking status to them.
To cover three queries - with brief answers, in the interest of my own time, and in not cluttering up the main thread:
--The cyclonic cloud motion some are talking about that is "seemingly breaking off from" Gabrielle and heading SW on route to Florida is the upper level low (TUTT low) mentioned in previous threads, and in Typhoon Tip's earlier Invest 99 thread (See main page).
--Many subtropical cyclones do go on to become fully tropical.. and go on to become hurricanes. Rarely, if ever, does a subtropical storm strengthen to even minimal hurricane-force sustained winds without having transitioned into a more purely or purely tropical cyclone. Hence, you are unlikely to ever see an official "Subtropical Hurricane (Name here)".
Subtropical cyclones do form in many basins, and at many latitudes, but as the moniker explicitly suggests, they most often form in the .. subtropics.
--Please note that Subtropical Storm Gabrielle is a Subtropical Cyclone and not an extra-tropical gale. There are very valid, technical reasons for this, and the highly-educated and skilled experts at have not just somehow arbitrarily decided to draw down a name for the sake of whatever, and applied it to this system.
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madmumbler
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Looks like the has decided to reclassify Gabby as a tropical storm based upon their findings.
How exactly do they tell this? Is it based upon reading from the dropsondes or the fly-throughs or satellite or what?
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Lesli in SWFL.
Friends help you move. Real friends help you move bodies.
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JY381
Unregistered
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Gabby is exploding with convection right now, and the low-level center of circulation has finally dug under the convection...
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allan
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Ya know, for a weak storm at durinal minimum, this storm is not doing too bad. I see this becoming at least a 70 mph. storm at landfall due to durinal minimum. Yes, the center in right in the southeast convection. A few more storms in that area would already make it 50 mph. at best. This is going to be one interesting night. What's also interesting is that storms that move out to sea from the Carolinas strengthens, Alex (2004) and Gustav (2002). Hurricane Gustav as I've been mentioning throught this whole storm is the twin to Gabrielle. Check out the track
http://www.wunderground.com/hurricane/at20027.asp
I guess I do see how this "could" become a minimal Hurricane due to the recent blow up and durinal max later on tonight, but chances are very low. Don;t be surprised though.. remember ?
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Allan Reed - 18,9,5
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Beach
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Loc: Cocoa Beach/Banana River
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Is the storm jogging to the West?
http://www.ssd.noaa.gov/goes/flt/t3/loop-wv.html
What I perceive as the center seems to be moving along 33N
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Seaworthy991
Unregistered
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How about the hurricane of 1938 that devastated Providence RI and the SE Coast of Massachusetts?
Wasn't it a small storm that explode in the vicinity of delmarva or further north?
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