Dr. Jeff Masters' WunderBlog

Earl hits Nova Scotia but spares New England; Gaston still a threat
Posted by: Dr. Jeff Masters, 4:30 PM GMT en Septiembre 04, 2010 +2
Tropical Storm Earl roared ashore over western Nova Scotia late this morning, bringing heavy rain and tropical storm force winds to much of the province. The capital of Halifax recorded sustained winds of 51 mph, gusting to 75 mph at 12:48pm AST this afternoon, and the power is out to tens of thousands of residents in Nova Scotia. Winds were stronger at McNabs Island, in Halifax Harbor, where sustained winds of 64 mph, gusting to 76 mph, occurred at noon AST.

Earl's center passed about 100 miles southeast of Nantucket, Massachusetts, at 1am EDT this morning, and the winds on the weak left side of the storm never reached sustained tropical storm strength (39 mph) at any New England land station. The peak wind gust in Massachusetts may have been the 58 mph gust recorded on Cape Cod 5 miles south-southeast of Barnstable early this morning. Earl did bring some very high waves to New England; waves at the buoy 60 miles southeast of Nantucket peaked at 27 feet early this morning. Heavy rain from Earl--over five inches in some locations--caused localized flooding and road closures on Cape Cod and on Marthas Vineyard.


Figure 1. Hurricane Earl as seen from the International Space Station on Thursday, September 2, 2010. Image credit: NASA astronaut Douglas Wheelock.


Figure 2. Radar estimated rainfall from Earl from the Cape Cod radar.

Gaston a threat to develop
Recent satellite imagery shows that Gaston's remains have developed a well-organized surface circulation, but not enough heavy thunderstorm activity to be considered a tropical depression. A large amount of dry air surrounds Gaston's remains on all sides, as seen on water vapor satellite loops. This dry air will continue to be a major impediment to development. The latest SHIPS model forecast predicts shear will remain moderate, 10 - 15 knots, for the next four days, then fall to the low range. The winds creating the shear are coming from the east, where a tongue of dry air has intruded. These easterly winds will be able to drive the dry air into Gaston's core, disrupting it, unless the storm can find a moister environment. It is also possible that Gaston may be able to protect its core by wrapping moisture around to its east side; recent visible satellite imagery shows a band of moisture wrapping around along Gaston's south side. If this process is successful, Gaston may have a good chance of becoming a tropical depression on Sunday. I suspect there is too much dry air in Gaston's environment for Gaston to develop into a tropical depression today. The atmosphere is moister near the Lesser Antilles Islands, and Gaston has a better chance of developing on Monday when it finds this moister environment. NHC is giving Gaston a 70% chance of regenerating into a tropical depression by Monday. The models are in fairly good agreement bringing Gaston though the central or northern Lesser Antilles Islands on Tuesday. The storm should then slow down and head more to the west-northwest on Wednesday and Thursday, in response to a large trough of low pressure expected to move off the U.S. East Coast. Puerto Rico and the Dominican Republic might be at risk of a strike by a reborn Tropical Storm Gaston by Thursday, if the storm follows a more southerly track over the next few days.


Figure 3. Morning satellite image of Gaston's remains.

Gulf of Mexico disturbance
A concentrated area of heavy thunderstorms has developed over the extreme southwestern Gulf of Mexico, in the Bay of Campeche. This disturbance is under a low 5 - 10 knots of wind shear, and has a 20% chance of developing into a tropical depression by Monday, according to NHC. The disturbance is headed northwest at 5 - 10 mph, but could turn more to the north-northwest and bring heavy rains to the Texas/Mexico border region on Monday, according to the latest run of the GFS model.

99L
A tropical wave (99L) near the Cape Verdes Islands off the coast of Africa is moving northwestward at about 10 mph. The wave has a bit of spin to it, but not much heavy thunderstorm activity. This system is under moderate wind shear, but is headed towards a region of high wind shear northwest of the Cape Verdes Islands. This shear will very likely destroy the disturbance by Tuesday. NHC is giving 99L a 20% chance of developing into a tropical depression by Monday afternoon.

Elsewhere in the tropics
The GFS and ECMWF models are predicting development 3 - 6 days from now of a tropical wave that hasn't emerged from the coast of Africa yet.

Next post
I'll have an update by 1pm Sunday afternoon.

Jeff Masters
Hurricane Earl Waves (Murko)
Waves from Eleuthera, Bahamas, as Earl passed by as a cat 4 storm. The cliffs are about 30ft high.
Hurricane Earl Waves
Earl The Pearl (teach50)
Went down to Jones Beach again today. The beach was taken over by the power of the waves during high tide.
Earl The Pearl
Hurricane Earl Surf@ Newport RI # 4 (RIWXPhoto)
Hurricane Earl Surf@ Newport RI # 4
Categories: Hurricane
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2502. benirica 2:44 PM GMT en Septiembre 05, 2010    
This Gaston guy is really playing with us...
As to its relationship with Puerto Rico, it reminds me of Jeanne. Jeanne didn't develop until she was over the Lesser Antilles, right about to come in to the Caribbean. Back then she went in two days from a TD to a 70mph Tropical Storm, really catching us off guard in Puerto Rico.
Keeping in mind that this year the TCHP is extremely high, off the charts for that matter, it would be irresponsible for anyone to write ex/re-Gaston off.
Storm, any thoughts?
Member Since: Agosto 3, 2006 Posts: 0 Comments: 1142
2503. Vero1 2:45 PM GMT en Septiembre 05, 2010    
Quoting Relix:
Hey StormW! I know you don't work on Sundays but I would really like your quick take on ex-Gaston. The track shouldn't be too hard. It's aiming at the NE islands, south or north, yet the intensity puzzles me. It's past 50W, now it has the break to form into something. The circulation is tight. What can we expect from strength?


If you go back a few pages in the blog and start reading you will find StormW's take on Gaston and More.
Member Since: Julio 21, 2008 Posts: 4 Comments: 2233
2504. golfjunkie88 2:45 PM GMT en Septiembre 05, 2010    
Quoting StormW:
I'll tell ya...if ignorance is bliss...then Dr. Masters blog is in ecstasy


Classic...
Member Since: Agosto 31, 2010 Posts: 0 Comments: 6
2505. AllStar17 2:46 PM GMT en Septiembre 05, 2010    
Quoting cchsweatherman:
Reflecting back on Hurricane Earl, I must admit that I was definitely impressed by the computer model performance and with the NHC forecasting with this storm. The NHC and computer models were pretty accurate on forecasting when the turn would take place. It seems as we progress in time and technology, track forecasts are becoming much improved. Now all that remains is to try and understand the conditions for intensifying and weakening better so that forecasters can better forecast changes in intensity.


I'm not so sure about that. Early model runs had Earl recurving near Bermuda, whereas it really recurved just off the US East Coast, a difference of about 610 miles.
Member Since: Junio 29, 2009 Posts: 13 Comments: 5135
2506. Grecojdw 2:46 PM GMT en Septiembre 05, 2010    
Quoting fldude99:
Invest 90L is in the same place Opal began in '95..made a beeline for FL panhandle


That was definitely under different conditions. A powerful cold front swung down and turned the storm. The discussions now suggest this will probably a Northern Mexico thing. It is too early in the seasons for fronts to comedown and swing these storms to the NE. So we in the Panhandle should be OK barring some crazy event. Texas should watch 90L closely though.
Member Since: Enero 6, 2010 Posts: 0 Comments: 339
2507. kingzfan104 2:47 PM GMT en Septiembre 05, 2010    
2508. WatchingThisOne 2:47 PM GMT en Septiembre 05, 2010    
Quoting StormW:
I'll tell ya...if ignorance is bliss...then Dr. Masters blog is in ecstasy


rofl - thanks, I needed that this morning!
Member Since: Julio 15, 2005 Posts: 3 Comments: 1249
2509. luigi18 2:47 PM GMT en Septiembre 05, 2010    
Quoting StormW:


Hello Dr Storm you think GASTONAAAA is heading our way here in PR Gastona she is a lady! have to be carefull!
Member Since: Septiembre 21, 2008 Posts: 0 Comments: 452
2510. BenBIogger 2:48 PM GMT en Septiembre 05, 2010    
0z Ukmet
120hrs

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2512. cirrocumulus 2:49 PM GMT en Septiembre 05, 2010    
Even though 90L will head inland soon according to all the statistical and dynamical models, it always reminds one of Camille if one of these gulf storms was to sit and spin for a couple of days before moving north. Especially over the very warm waters!
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2513. Grothar 2:49 PM GMT en Septiembre 05, 2010    
Quoting Gearsts:
link?


To what? I have posted 6 different images.
Member Since: Julio 17, 2009 Posts: 56 Comments: 19546
2514. MiamiHurricanes09 2:50 PM GMT en Septiembre 05, 2010    
The remnants of ex-Gaston are slowly trying to get better organized by developing some convection mainly to the west and south of the circulation (some convection trying to develop atop the circulation can be noted, let's see if it can continue the trend). It however will need more convective organization to get re-classified though.

Member Since: Septiembre 2, 2009 Posts: 129 Comments: 19976
2515. stillwaiting 2:50 PM GMT en Septiembre 05, 2010    
Quoting cirrocumulus:
90L must be a depression by now!

.....nope, gonna have to wait another 12hrs,still at 60%,the eastern gom needs to be watched for some activity! !!
Member Since: Octubre 5, 2007 Posts: 20 Comments: 4970
2517. Cotillion 2:50 PM GMT en Septiembre 05, 2010    
To add to the previous:

The top 25 ACE seasons since 1851:

Source

(NB: Seasons before 1960 are likely to be undervalued in ACE and storm numbers due to minimal technology. Even Landsea notes that: "With the artificial jump in the 2000s in the frequency of short-lived systems, a more realistic estimate of the long-term climatology may be closer to 13 tropical storms and hurricanes per year." Given the quoted figure of 10-6-2 for 1950 onwards, adding 2-3 storms to each season prior to the 1950s in particular would probably be closer to the actual figure).

2005: 248 (28-15-7 - inc. one Subtropical storm, 27-15-7 for ACE purposes)
1950: 243 (13-11-8)
1893: 231 (12-10-5)
1995: 227 (19-11-5)
2004: 224 (15-9-6)
1926: 222 (11-8-6)
1933: 213 (21-10-5)
1961: 205 (11-8-7)
1955: 199 (12-9-6)
1887: 182 (19-11-2)
---
1998: 182 (14-10-3)
1878: 181 (12-10-2)
1999: 177 (12-8-5)
2003: 175 (16-7-3)
1964: 170 (12-6-6)
1886: 166 (12-10-4)
1996: 166 (13-9-6)
1906: 163 (11-6-3)
1969: 158 (18-12-5)
1899: 150 (9-5-2)* Half of this is one storm alone.
---
1980: 147 (11-9-2)
1966: 145 (11-7-3)
1916: 144 (15-10-5)
2008: 144 (16-8-5)
1951: 137 (10-8-5)
Member Since: Agosto 23, 2008 Posts: 7 Comments: 5300
2518. Relix 2:51 PM GMT en Septiembre 05, 2010    
Convection forming around Gaston's COC. Little by little.

Thanks Vero1, found StormW's take.
Member Since: Agosto 3, 2006 Posts: 0 Comments: 2358
2519. Grecojdw 2:51 PM GMT en Septiembre 05, 2010    
Quoting sammywammybamy:


Agreed?

Here is this Decent?



good track:)
Member Since: Enero 6, 2010 Posts: 0 Comments: 339
2523. Neapolitan 2:54 PM GMT en Septiembre 05, 2010    
Quoting Cotillion:
#2465

With ACE, 2010, largely due to Danielle and Earl, has got around 61. As mentioned in a post yesterday, Gaston would need to be a strong Cat 1 hurricane/minimal Cat 2 for a week or so to surpass 2006 (and 2002/07 which is lower). Let alone any help from 'friends'.

Whether it'll reach the giddy heights predicted, I'm not so sure. That would rely on one or two long trackers, with a strong storm or two in the Caribbean at least. Plausible, yes, but far from any certainty. The 25th highest ACE season was 1955 with 137. So, more than half off, but with the peak (cue the chart) to come.


Well, 1955's ACE was 199, making it the sixth strongest ACE season between 1950 and 2009.

We're a week away from the climatological peak of what promises to be a very back-loaded season. ACE went from under 10 to 60 in just 10 days (yes, mostly due to Danielle and Earl), meaning that such rapidly-increasing numbers are possible again...and especially once a couple of Cat 4s and Cat 5s start popping off in the Gulf and Caribbean. If we don't end 2010 with an ACE above 150, I'll be very surprised; 170+ seems about right to me.
Member Since: Noviembre 8, 2009 Posts: 4 Comments: 11165
2524. stillwaiting 2:54 PM GMT en Septiembre 05, 2010    
Quoting kingzfan104:


you are easily the biggest florida wishcaster on here. everything goes right to you or in your direction in florida and those are the only questions you ask. dont deny it, just admit it. ill admit i love hurricanes and love getting hit by them. no big deal.

just stop trying to deny it and embrace it, because you are giving people who think you know what you are talking about a terribly wrong idea as to what this system will do.
,not even close,jeff941of orlando,ALWAYS says the tc is headed for fl's central east coast,lol
Member Since: Octubre 5, 2007 Posts: 20 Comments: 4970
2525. washingtonian115 2:55 PM GMT en Septiembre 05, 2010    
Quoting kingzfan104:


you are easily the biggest florida wishcaster on here. everything goes right to you or in your direction in florida and those are the only questions you ask. dont deny it, just admit it. ill admit i love hurricanes and love getting hit by them. no big deal.

just stop trying to deny it and embrace it, because you are giving people who think you know what you are talking about a terribly wrong idea as to what this system will do.
Sammywammybamy's not on my ignore list,but sometimes he can be out of iine.
Member Since: Agosto 14, 2010 Posts: 5 Comments: 10655
2526. MiamiHurricanes09 2:56 PM GMT en Septiembre 05, 2010    
Wow, pretty impressive pressure from the ATCF best track as of 12z for 90L.

AL, 90, 2010090512, , BEST, 0, 194N, 956W, 25, 1005, DB,

Ex-Gaston's pressure however continues to increase, and now the winds have decreased to 30mph.

AL, 09, 2010090512, , BEST, 0, 168N, 500W, 25, 1009, LO,
Member Since: Septiembre 2, 2009 Posts: 129 Comments: 19976
2528. CrazyDuke 2:56 PM GMT en Septiembre 05, 2010    
Storm, it gets real depressing when you realize ignorance is how most people make it through their lives. To be fair, most people aren't interested in meteorology or climatology (or most other science, mathematical theory, and technology) beyond the "Oooh! Shiny!" and "It's all about me and mine!" aspects. People showing any interest at all beyond that are actually above average. Most, by fate or free will, are not.
Member Since: Febrero 13, 2007 Posts: 0 Comments: 140
2529. Grecojdw 2:57 PM GMT en Septiembre 05, 2010    
Quoting washingtonian115:
Sammywammybamy's not on my ignore list,but sometimes he can be out of iine.


He's definitely not one of the annoying ones or one of the JFV potentials.:0
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2530. weatherxtreme 2:57 PM GMT en Septiembre 05, 2010    
Well looks like Gaston looking better today and to think someone here the other day here was sounding like he would go out with the FISH.
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2531. kingzfan104 2:57 PM GMT en Septiembre 05, 2010    
2532. cirrocumulus 2:58 PM GMT en Septiembre 05, 2010    
Quoting stillwaiting:
.....nope, gonna have to wait another 12hrs,still at 60%,the eastern gom needs to be watched for some activity! !!


I think it must be a depression now or in a couple of hours because it is a little over land off and on. It has plenty of firepower over the warm waters so it must be a depression with the 1005 millibar low.
Member Since: Septiembre 30, 2005 Posts: 0 Comments: 1606
2533. aislinnpaps 2:58 PM GMT en Septiembre 05, 2010    
Quoting Grecojdw:


He's definitely not one of the annoying ones or one of the JFV potentials.:0


For two years I've read the references to JFV, can someone explain?
Member Since: Agosto 22, 2009 Posts: 0 Comments: 2438
2535. Cotillion 2:59 PM GMT en Septiembre 05, 2010    
Quoting Neapolitan:


Well, 1955's ACE was 199, making it the sixth strongest ACE season between 1950 and 2009.

We're a week away from the climatological peak of what promises to be a very back-loaded season. ACE went from under 10 to 60 in just 10 days (yes, mostly due to Danielle and Earl), meaning that such rapidly-increasing numbers are possible again...and especially once a couple of Cat 4s and Cat 5s start popping off in the Gulf and Caribbean. If we don't end 2010 with an ACE above 150, I'll be very surprised; 170+ seems about right to me.


You're correct regarding 1955, I meant 1951. 1955 is way higher (see the above list, now corrected).
Member Since: Agosto 23, 2008 Posts: 7 Comments: 5300
2537. washingtonian115 3:00 PM GMT en Septiembre 05, 2010    
Quoting MiamiHurricanes09:
Wow, pretty impressive pressure from the ATCF best track as of 12z for 90L.

AL, 90, 2010090512, , BEST, 0, 194N, 956W, 25, 1005, DB,

Ex-Gaston's pressure however continues to increase, and now the winds have decreased to 30mph.

AL, 09, 2010090512, , BEST, 0, 168N, 500W, 25, 1009, LO,
I'm impressed that the pressures are actually that low.Could see a possible depression late tonight or tomarrow.
Member Since: Agosto 14, 2010 Posts: 5 Comments: 10655
2538. LADobeLady 3:00 PM GMT en Septiembre 05, 2010    
Quoting aislinnpaps:


For two years I've read the references to JFV, can someone explain?


He's fodder for bored bloggers who have nothing to do when things are quiet.
Member Since: Julio 29, 2005 Posts: 21 Comments: 794
2539. Orcasystems 3:01 PM GMT en Septiembre 05, 2010    
Quoting sammywammybamy:

OK, thats not even fair...I have not even finished updating the darn things and your posting them :(
Member Since: Octubre 1, 2007 Posts: 77 Comments: 26077
2540. stillwaiting 3:01 PM GMT en Septiembre 05, 2010    
Quoting aislinnpaps:


For two years I've read the references to JFV, can someone explain?
...you really wanna know????,WU's most infamous troll
Member Since: Octubre 5, 2007 Posts: 20 Comments: 4970
2541. Grecojdw 3:01 PM GMT en Septiembre 05, 2010    
Quoting sammywammybamy:


Lol Ive Been Here Since 2006.

Anyway Why is the Blog So Obbsesed with JFV?

I Dont Understand? He Lied about Having a Girlfriend.


If you have enter encountered him in chat, you will understand why. I didn't believe it my self until I tried to do the real time thing in the chat area. He is in there some how some way constantly and ruins all the discussion about hurricane related items. After the last barrage of insults from him I decided not to ever go in there again.
Member Since: Enero 6, 2010 Posts: 0 Comments: 339
2543. OracleDeAtlantis 3:01 PM GMT en Septiembre 05, 2010    
Quoting StormW:


I know you're not talking of Gaston. Oh...and the forecast for more west type tracks isn't wrong. Obviously, you don't know how to read forecast patterns.

Oh...POOF!!!


Sometimes this site reminds me of the Bewitched TV series.

We're so elegant in our nose twitching.
Member Since: Agosto 27, 2009 Posts: 0 Comments: 290
2544. ElConando 3:02 PM GMT en Septiembre 05, 2010    
Quoting MiamiHurricanes09:
Wow, pretty impressive pressure from the ATCF best track as of 12z for 90L.

AL, 90, 2010090512, , BEST, 0, 194N, 956W, 25, 1005, DB,

Ex-Gaston's pressure however continues to increase, and now the winds have decreased to 30mph.

AL, 09, 2010090512, , BEST, 0, 168N, 500W, 25, 1009, LO,


It is wobbly to say the least.
Member Since: Septiembre 6, 2009 Posts: 2 Comments: 3703
2546. washingtonian115 3:02 PM GMT en Septiembre 05, 2010    
Quoting sammywammybamy:


Lol Ive Been Here Since 2006.

Anyway Why is the Blog So Obbsesed with JFV?

I Dont Understand? He Lied about Having a Girlfriend.
Let's not even go their.Please let's get back to weather.The blog is more peaceful without his name mentioned.and I mean it.....
Member Since: Agosto 14, 2010 Posts: 5 Comments: 10655
2547. Orcasystems 3:03 PM GMT en Septiembre 05, 2010    
Quoting sammywammybamy:


Sorry Orca Lol. It Okay Ill Take it Down For You =)


Its ok, the rest are almost done
Member Since: Octubre 1, 2007 Posts: 77 Comments: 26077
2548. Neapolitan 3:04 PM GMT en Septiembre 05, 2010    
Quoting MiamiHurricanes09:
Wow, pretty impressive pressure from the ATCF best track as of 12z for 90L.

AL, 90, 2010090512, , BEST, 0, 194N, 956W, 25, 1005, DB,

Ex-Gaston's pressure however continues to increase, and now the winds have decreased to 30mph.

AL, 09, 2010090512, , BEST, 0, 168N, 500W, 25, 1009, LO,


True...but in all fairness to ex-Gaston, that was some hours ago, and since then he's started to perk up rather quickly, and he's small enough that changes up or down are likely to be quickly reflected in the numbers...
Member Since: Noviembre 8, 2009 Posts: 4 Comments: 11165
2549. Grecojdw 3:05 PM GMT en Septiembre 05, 2010    
Quoting Neapolitan:


True...but in all fairness to ex-Gaston, that was some hours ago, and since then he's started to perk up rather quickly, and he's small enough that changes up or down are likely to be quickly reflected in the numbers...


I was wondering if those were old figures. Are there any new ones out yet?
Member Since: Enero 6, 2010 Posts: 0 Comments: 339
2550. aislinnpaps 3:05 PM GMT en Septiembre 05, 2010    
Quoting stillwaiting:
...you really wanna know????,WU's most infamous troll


Yeah, kinda, so I can understand all the references. You can email me so as not to take it up on the blog?
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About JeffMasters
Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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