Dr. Jeff Masters' WunderBlog

An early season Atlantic named storm looking less likely
Posted by: Dr. Jeff Masters, 14:46 GMT le 15 mai 2009 +2
The possibility of a May subtropical storm forming near Florida next week now appear dim, according to the latest suite of runs by the GFS, UKMET, NOGAPS, and ECMWF global dynamical computer models. Yesterday's runs indicated that a small area of low shear air might develop over Florida next week, between the polar jet stream to the north and the subtropical jet stream to the south. However, the latest set of runs are showing a much reduced area of low shear, too small for a subtropical storm to form. Perhaps a better chance for a subtropical storm to form is in the mid-Atlantic a few hundred miles east of Bermuda. There, a large upper-level cold low has cut off from the jet stream, and it may spin in place long enough over the next week to develop a warm core and be classified as Subtropical Storm Ana. It is unlikely that a subtropical storm forming that far out in the Atlantic this early in the year would pose a threat to any land areas, with the possible exception of Bermuda.

Climatology of early-season Atlantic tropical cyclones
Tropical storms are uncommon in the Atlantic before June 1, with only 26 named storms on record between 1851 - 2008. Five of these have made it to hurricane strength, and only one--Hurricane Able of 1951--made it to major hurricane status. Last year's Tropical Storm Arthur may be the deadliest May tropical cyclone on record. Though only a 40 mph tropical storm at landfall, Arthur killed five people in Belize and caused $78 million in damage. Three early-season storms have brought hurricane-force winds to land. The March 1908 hurricane swept through the northern Lesser Antilles Islands as a Category 1 or 2 hurricane, destroying at least 24 boats and causing damage to buildings on St. Bartholomew. Hurricane Able of 1951 brought sustained winds of 90 - 95 mph to the northern Bahama Islands, but caused little damage. Hurricane 2 of May 1908 hit North Carolina's Outer Banks as a Category 1 hurricane, but also caused little damage.


Figure 1. Tracking map for the earliest hurricane to make landfall, the March 1908 hurricane in the northern Lesser Antilles Islands.

List of all early season (formed in January - May) Atlantic named storms
May 31, 2008: Tropical Storm Arthur
May 6, 2007: Subtropical Storm Andrea
April 18, 2003: Tropical Storm Ana
April 21, 1992: Subtropical Storm 1
May 6, 1981: Tropical Storm Arlene
January 18, 1978: Subtropical Storm 1
May 21, 1976: Subtropical Storm 1
May 23, 1972: Subtropical Storm Alpha
May 17, 1970: Hurricane Alma (Category 1)
May 28, 1959: Tropical Storm Arlene
February 2, 1953: Tropical Storm Alice
May 25, 1952: Tropical Storm 1
May 15, 1951: Hurricane Able (Category 3)
May 22, 1948: Tropical Storm 1
May 19, 1940: Tropical Storm 1
May 27, 1934: Tropical Storm 1
May 14, 1933: Tropical Storm 1
May 5, 1932: Tropical Storm 1
May 13, 1916: Tropical Storm 1
May 24, 1908: Hurricane 2 (Category 1)
March 6, 1908: Hurricane 1 (Category 2)
May 27, 1890: Tropical Storm 1
May 16, 1889: Hurricane 1 (Category 1)
May 17, 1887: Tropical Storm 2
May 15, 1887: Tropical Storm 1
May 30, 1865: Tropical Storm 1

I'll have an update over the weekend if the models indicate a renewed tropical threat; otherwise, have a great weekend, and I'll be back on Monday.

Jeff Masters
Categories: Hurricane
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51. cchsweatherman 16:04 GMT le 15 mai 2009    
Quoting CaneAddict:


He's going off one set of runs...We need to see more consistency before we say nothing will form. I don't understand why he's basing his whole blog off one run of the models...Time will tell.


Even though I have great respect for Dr. Masters, I must agree with CaneAddict here. Just because one model run set may back off on a possible system (remember at 06Z, the model run set Dr. Master's based his conclusion on, that only three models run - GFS, NOGAPS, and NAM) doesn't mean that we jump aboard with it. In forecasting, one must always look for consistency and support before making conclusions. Just my opinion.
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52. beell 16:07 GMT le 15 mai 2009    
no cap, 12 knots of shear
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53. TheCaneWhisperer 16:07 GMT le 15 mai 2009    
Man! I knew the drought buster was too good to be true, crunchy grass it is.
54. IKE 16:07 GMT le 15 mai 2009    
Quoting cchsweatherman:


Even though I have great respect for Dr. Masters, I must agree with CaneAddict here. Just because one model run set may back off on a possible system (remember at 06Z, the model run set Dr. Master's based his conclusion on, that only three models run - GFS, NOGAPS, and NAM) doesn't mean that we jump aboard with it. In forecasting, one must always look for consistency and support before making conclusions. Just my opinion.


Plus the 00Z ECMWF still showed development.
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55. IKE 16:08 GMT le 15 mai 2009    
Quoting beell:
no cap, 12 knots of shear


Is that what the 12Z GFS shows? Can you link me the correct chart to find that?
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56. DaytonaBeachWatcher 16:10 GMT le 15 mai 2009    
shear, according to the gfs, will be decreasing in the gulf through 168 hrs
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57. aspectre 16:11 GMT le 15 mai 2009    
Ever notice how long 50, 100, 150, etc sit before anyone posts.

EDIT in: And naturally this time would be the exception.
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58. SomeRandomTexan 16:12 GMT le 15 mai 2009    
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59. DaytonaBeachWatcher 16:14 GMT le 15 mai 2009    
Link

Now this is interesting
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60. beell 16:14 GMT le 15 mai 2009    
Quoting IKE:


Is that what the 12Z GFS shows? Can you link me the correct chart to find that?


Sorry, hit post too quick-that was in response to post 39
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61. SomeRandomTexan 16:14 GMT le 15 mai 2009    
Well if the low that enters the GOM via the Yucatan straight can find favorable conditions, then we could find that to be ANA... the area in the GOM that it will be has warm SSTs and shear will be decreasing...

something to think about and wait and watch for at least
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62. DaytonaBeachWatcher 16:15 GMT le 15 mai 2009    
Link

AS IS THIS

Link

and this
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63. SomeRandomTexan 16:20 GMT le 15 mai 2009    
Quoting DaytonaBeachWatcher:
Link

AS IS THIS

Link

and this


If those are right then that low would be sitting over the loop eddy... its not hot enough for rapid intensification but could still possibly develop something... jmho
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64. nocaneindy 16:32 GMT le 15 mai 2009    
Boy that ull sure is just sitting and spinning. Maybe the Doc. was right and it'll sit long enough to be fish bait named Ana. Cold water aside crownweather website has the 12z probability map from noaa up and i believe it has that storm as the highest probability of development yet in Atl. basin this year.
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65. aspectre 16:35 GMT le 15 mai 2009    
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66. Orcasystems 16:35 GMT le 15 mai 2009    


This does not look to friendly.
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67. hahaguy 16:36 GMT le 15 mai 2009    
Quoting NRAamy:
hey sonny boy!

;)

I lurk once in awhile...it gets pretty heated in here once H Season starts up....

;)
You should come in more often. =)
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68. ricderr 16:37 GMT le 15 mai 2009    
welcome sports fans....it may be a few weeks early but ...LET'S GET READY TO RUMBLEEEEEEEEEE

here in the blue corner we have the still undefeated doc masters with a perfect record so far...he's lost a few rounds...received a draw two season ago but is still the undisputed middleweight hurricane champ...

and here in the red corner we have the new comers..the challengers..they are a young bunch....with yet a proven record and some are whispering the label "wishcaster"...but they are not without brashness and vim and vigor and are calling the champ out....saying he's past his prime...sight is dimmed from years of hurricane hunter jostling..and they feel he's ready for the big fall and they're lined up to steal his belt...

more to follow sports fans...


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69. SomeRandomTexan 16:40 GMT le 15 mai 2009    
Quoting ricderr:
welcome sports fans....it may be a few weeks early but ...LET'S GET READY TO RUMBLEEEEEEEEEE

here in the blue corner we have the still undefeated doc masters with a perfect record so far...he's lost a few rounds...received a draw two season ago but is still the undisputed middleweight hurricane champ...

and here in the red corner we have the new comers..the challengers..they are a young bunch....with yet a proven record and some are whispering the label "wishcaster"...but they are not without brashness and vim and vigor and are calling the champ out....saying he's past his prime...sight is dimmed from years of hurricane hunter jostling..and they feel he's ready for the big fall and they're lined up to steal his belt...

more to follow sports fans...




ROFLMAO!!!!!
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70. IKE 16:42 GMT le 15 mai 2009    
Watch out big-easy! Where's stormtop?

12Z GFS @ 180 hours....

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71. eye2theskies 16:43 GMT le 15 mai 2009    
Quoting cchsweatherman:


Even though I have great respect for Dr. Masters, I must agree with CaneAddict here. Just because one model run set may back off on a possible system (remember at 06Z, the model run set Dr. Master's based his conclusion on, that only three models run - GFS, NOGAPS, and NAM) doesn't mean that we jump aboard with it. In forecasting, one must always look for consistency and support before making conclusions. Just my opinion.


I'm glad I packed the padding for everyone to use that are jumping off the first storm bandwagon with my hurricane season supplies!
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72. jeffs713 16:44 GMT le 15 mai 2009    
LOL. The GFS is not content with spinning up one storm, it feels a need to spin 2 up... in May.
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73. AussieStorm 16:44 GMT le 15 mai 2009    
Hi all.... need sum help... i have lost all my weather links. is there a page i can visit to get most of them back.
Cheers AussieStorm
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74. nocaneindy 16:44 GMT le 15 mai 2009    
He's out seeding the gulf in his twin turboprop.
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75. NRAamy 16:44 GMT le 15 mai 2009    
70. IKE 9:42 AM PDT on May 15, 2009
Watch out big-easy! Where's stormtop?


now you've done it!!

;)
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76. nrtiwlnvragn 16:50 GMT le 15 mai 2009    
Quoting AussieStorm:
Hi all.... need sum help... i have lost all my weather links. is there a page i can visit to get most of them back.
Cheers AussieStorm


Helpful Online Resources
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77. Seastep 16:51 GMT le 15 mai 2009    
Quoting AussieStorm:
Hi all.... need sum help... i have lost all my weather links. is there a page i can visit to get most of them back.
Cheers AussieStorm


SJ's has a pretty good list.

Link
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78. boyzNme 16:52 GMT le 15 mai 2009    
CatastrophicDL: I have an addition to your hurricane supply list: Clothes pins!! Never underestimate the power of these little gems. I have a bag of them that I take camping every time, and they are used, used, used!!
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79. AussieStorm 16:54 GMT le 15 mai 2009    
Quoting Seastep:


SJ's has a pretty good list.

Link


thanks
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80. IKE 16:54 GMT le 15 mai 2009    
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81. AussieStorm 16:56 GMT le 15 mai 2009    
Quoting nrtiwlnvragn:


Helpful Online Resources

Thanks
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82. Seastep 16:56 GMT le 15 mai 2009    
Aussie - Everything back to normal after those horrific fires?

Have they rebuilt?
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83. hurricane23 16:56 GMT le 15 mai 2009    
Agree looking less likely anything will develope.
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84. CatastrophicDL 16:59 GMT le 15 mai 2009    
Quoting boyzNme:
CatastrophicDL: I have an addition to your hurricane supply list: Clothes pins!! Never underestimate the power of these little gems. I have a bag of them that I take camping every time, and they are used, used, used!!

Good suggestion! I'll get them added.
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85. Drakoen 17:12 GMT le 15 mai 2009    
I respectfully disagree with Jeff Masters. He's going off the 06z runs which some models made drastic changes other reliable models changed only slightly. The newest runs show favorable conditions over the central and eastern GOM.Link Link
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86. IKE 17:14 GMT le 15 mai 2009    
Quoting Drakoen:
I respectfully disagree with Jeff Master. He's going off the 06z runs which some models made drastic changes other reliable models changed only slightly. The newest runs show favorable conditions over the central and eastern GOM.Link


Drak...are you getting those shear charts from here?
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87. Drakoen 17:15 GMT le 15 mai 2009    
Quoting IKE:


Drak...are you getting those shear charts from here?


Yes.
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88. Seastep 17:18 GMT le 15 mai 2009    
Agree Drak. And the GFS shows a more favorable shear environment starting at 102h.
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89. IKE 17:23 GMT le 15 mai 2009    
Thanks....I see where to look now.
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90. SouthALWX 17:24 GMT le 15 mai 2009    
hi all. agree on most points ... however this early I gotta go with climatology... I doubt we see a depression until June.
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91. Gustavike 17:24 GMT le 15 mai 2009    
The season of rain in Cuba began. A low pressure of the mean levels of the troposphere maintains the instability to a large extent of the country and rain will persist several days.
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92. hurricane23 17:26 GMT le 15 mai 2009    
Very Nice CMC but not happening.
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93. Unfriendly 17:27 GMT le 15 mai 2009    
Quoting nocaneindy:
He's out seeding the gulf in his twin turboprop.


Probably still in his moms basement/advanced weathercenter 5000. I hear Dell makes some good computers for model runs.
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94. IKE 17:28 GMT le 15 mai 2009    
Quoting hurricane23:
Very Nice CMC but not happening.


Not to tick you off and yes, the CMC is w-a-y too aggressive a majority of the time, but, how do you know it's not happening?
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95. Skyepony (Mod) 17:29 GMT le 15 mai 2009    
I didn't think the 00Z runs overall looked as favorable as yesterday either. I did't see this as a one run decision.
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96. Orcasystems 17:30 GMT le 15 mai 2009    
Quoting hurricane23:
Very Nice CMC but not happening.


That hour 132 sure looks interesting...
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97. TheCaneWhisperer 17:31 GMT le 15 mai 2009    
Quoting hurricane23:
Very Nice CMC but not happening.


With the exception of a couple runs, at least it's being consistent.
98. IKE 17:33 GMT le 15 mai 2009    
One thing that is unusual with this setup, is for a cold front to make it that far south, toward the latter part of May.

I would not rule out some development in the GOM, the middle to the end of next week.

Quoting TheCaneWhisperer:


With the exception of a couple runs, at least it's being consistent.


And it's also got model support.
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99. Orcasystems 17:33 GMT le 15 mai 2009    
Quoting Orcasystems:


That hour 132 sure looks interesting...


gfs shows it also.. different path and strength. ROFL, going to NOLA, go figure
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100. SouthALWX 17:35 GMT le 15 mai 2009    
Quoting TheCaneWhisperer:


With the exception of a couple runs, at least it's being consistent.


what do you mean? the other models are hedging there bets ....
GFS says,"see I was right!"
CMC says, "given infinite answers of course you are, *rolls eyes* "
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101. zoomiami 17:36 GMT le 15 mai 2009    
Ah ha! The yes it is, no it isn't has begun...it will be a long season.
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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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