Dr. Jeff Masters' WunderBlog

Late-starting hurricane seasons
Posted by: Dr. Jeff Masters, 02:01 PM GMT del 29 Luglio 2009 +2
Late-starting hurricane seasons--ones where the first named storm of the year doesn't occur until August--have happened in eleven of the fifty years between 1960 - 2009 (a 22% occurrence.) Only two of these eleven seasons ended up with more hurricanes than average (seven or greater). The record for the latest starting hurricane season since 1851 was set in 1914, when the only storm of the season formed on September 15. The year 1941 was also late starting, with the season's first storm arriving on September 11. Of course, we didn't have satellites back then, so it's a good bet there were storms earlier in these seasons that got missed. However, there's a good possibility that 1914 really did have only one storm. A re-analysis of the hurricane activity in the decade 1911-1920 (Landsea et al., 2008) found 1.3 missing tropical cyclones per year, thanks to the inclusion of a new database of ship weather reports called COADS. However, 1914 was not one of those years. Various authors have estimated that we missed an average of between one and three tropical cyclones per year during that time period, so it is quite possible 1914 had only one storm.


Figure 1. The hurricane season of 1914 featured only one tropical storm, and was the latest-starting hurricane season on record (September 15).

The latest dates for the first named storm of the season in the recent past, followed by the number of named storms, hurricanes, and intense hurricanes that year are:

2009 (August 15) 9,3,2
2004 (August 1) 15,9,6
2000 (August 4) 15,8,3
1988 (August 7) 12,6,3
1987 (August 9) 7,3,1
1984 (August 18) 13,5,1
1983 (August 15) 4,2,1
1977 (August 30) 6,5,1
1967 (August 30) 8,6,2
1963 (August 2) 9,6,2
1962 (August 22) 5,3,1

We can also add 1992 to the list if we ignore the unnamed subtropical storm that formed in April of that year. That year had the notorious Hurricane Andrew as its first named storm. Andrew formed on August 17 of that year, and was the only major hurricane in a year that had only seven named storms and four hurricanes. For comparison, an average Atlantic hurricane season has 10 named storms, 6 hurricanes, and 2 intense hurricanes. So, it is a good bet that 2009 will be a below-average season.

References
Landsea, C. W. , D. A. Glenn, W. Bredemeyer, M. Chenoweth, R. Ellis J. Gamache, L. Hufstetler, C. Mock, R. Perez, R. Prieto, J. Sanchez-Sesma, D. Thomas, and L. Woolcock, 2008, A Reanalysis of the 1911-20 Atlantic Hurricane Database", Journal of Climate, 21, p.2138-2168.

Jeff Masters
Categories: Hurricane
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901. AussieStorm 04:14 PM GMT del 30 Luglio 2009    
Quoting GBguy88:
Anyone really care about that new depression that looks very much like it's already a tropical storm? Models bring it awfully close to Hawaii...could really be worth watching.

It has been noted already. Wont come close to Hawaii. will be a fish-storm
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902. Chicklit 04:14 PM GMT del 30 Luglio 2009    
Oz, I'm not 'blog police,' but just reviewed Rules of the Road yesterday and this rule comes to mind:
No monomania.
mon⋅o⋅ma⋅ni⋅a  /ˌmɒnəˈmeɪniə, -ˈmeɪnyə/ Show Spelled Pronunciation [mon-uh-mey-nee-uh, -meyn-yuh] Show IPA
Use monomania in a Sentence
–noun 1. (no longer in technical use) a psychosis characterized by thoughts confined to one idea or group of ideas.
2. an inordinate or obsessive zeal for or interest in a single thing, idea, subject, or the like.

Origin:
1815–25; < NL; see mono-, -mania
Related forms:
mon⋅o⋅ma⋅ni⋅ac  /ˌmɒnəˈmeɪniˌæk/ Show Spelled Pronunciation [mon-uh-mey-nee-ak] Show IPA , noun
mon⋅o⋅ma⋅ni⋅a⋅cal  /ˌmɒnəməˈnaɪəkəl/ Show Spelled Pronunciation [mon-uh-muh-nahy-uh-kuhl] Show IPA , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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904. AussieStorm 04:16 PM GMT del 30 Luglio 2009    
Quoting Chicklit:
Oz, I'm not 'blog police,' but just reviewed Rules of the Road yesterday and this rule comes to mind:
No monomania.
mon⋅o⋅ma⋅ni⋅a  /ˌmɒnəˈmeɪniə, -ˈmeɪnyə/ Show Spelled Pronunciation [mon-uh-mey-nee-uh, -meyn-yuh] Show IPA
Use monomania in a Sentence
–noun 1. (no longer in technical use) a psychosis characterized by thoughts confined to one idea or group of ideas.
2. an inordinate or obsessive zeal for or interest in a single thing, idea, subject, or the like.

Origin:
1815–25; < NL; see mono-, -mania
Related forms:
mon⋅o⋅ma⋅ni⋅ac  /ˌmɒnəˈmeɪniˌæk/ Show Spelled Pronunciation [mon-uh-mey-nee-ak] Show IPA , noun
mon⋅o⋅ma⋅ni⋅a⋅cal  /ˌmɒnəməˈnaɪəkəl/ Show Spelled Pronunciation [mon-uh-muh-nahy-uh-kuhl] Show IPA , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.


LOL
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905. mikatnight 04:16 PM GMT del 30 Luglio 2009    
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906. GBguy88 04:16 PM GMT del 30 Luglio 2009    
Quoting BurnedAfterPosting:


Its been talked about all morning on here


Ah, well good then...sorry, I guess I could have checked back a couple of pages and avoided stating the obvious.
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907. BurnedAfterPosting 04:17 PM GMT del 30 Luglio 2009    
Quoting GBguy88:


Ah, well good then...sorry, I guess I could have checked back a couple of pages and avoided stating the obvious.


nah its ok, it happens
909. BenBIogger 04:20 PM GMT del 30 Luglio 2009    
My prediction are still going strong

4* named storms
1* hurricane
0* major hurricane





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910. AussieStorm 04:20 PM GMT del 30 Luglio 2009    
Quoting GBguy88:


Ah, well good then...sorry, I guess I could have checked back a couple of pages and avoided stating the obvious.

No worries mate.
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911. mikatnight 04:20 PM GMT del 30 Luglio 2009    
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912. AussieStorm 04:21 PM GMT del 30 Luglio 2009    
Quoting BenBIogger:
My prediction are still going strong

4* named storms
1* hurricane
0* major hurricane

I have a feeling there might be a strong/major hurricane. Especially with the SST's in the GOM.
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913. BurnedAfterPosting 04:22 PM GMT del 30 Luglio 2009    
Quoting AussieStorm:

I have a feeling there might be a strong/major hurricane.


Yea someone who says a 4 named storm, 1 hurricane prediciton is going strong just becuase there is no named storms before August is seriously dillusional at this point
915. Thundercloud01221991 04:23 PM GMT del 30 Luglio 2009    
Here is my prediction:

I am not a wishcaster don't think I am I am just predicting. I do not want people screaming at me because of this

13 Named Storms (8 in a 2 week period early september)

8 Hurricanes (5 in that 2 week period)

4 Major Hurricanes (all 4 in that 2 week period)
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916. mikatnight 04:25 PM GMT del 30 Luglio 2009    
Quoting BurnedAfterPosting:


Yea someone who says a 4 named storm, 1 hurricane prediciton is going strong just becuase there is no named storms before August is seriously dillusional at this point


Yeah, think that's shootin' a little low. Have to go back to '86 for just 6.
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917. BenBIogger 04:25 PM GMT del 30 Luglio 2009    
COAPS

8 Named Storms
4 Hurricane
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918. GBguy88 04:26 PM GMT del 30 Luglio 2009    
Quoting Thundercloud01221991:
Here is my prediction:

I am not a wishcaster don't think I am I am just predicting. I do not want people screaming at me because of this

13 Named Storms (8 in a 2 week period early september)

8 Hurricanes (5 in that 2 week period)

4 Major Hurricanes (all 4 in that 2 week period)


Wow, that'll be a hellish two weeks if that comes into fruition.
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920. catastropheadjuster 04:26 PM GMT del 30 Luglio 2009    
The SAL looks like it trying to lift out. At least it looks different from the last few days. At least to my untrained eyes. If the SAL lifts out pretty good does that mean it would be better for the waves to get there act together. Don't get me wrong I am not wishing for a storm of any kind. I am just trying to learn.

Sheri
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921. KYhomeboy 04:26 PM GMT del 30 Luglio 2009    
Quoting GBguy88:


Wow, that'll be a hellish two weeks if that comes into fruition.


LOL!!
922. Thundercloud01221991 04:27 PM GMT del 30 Luglio 2009    
Quoting GBguy88:


Wow, that'll be a hellish two weeks if that comes into fruition.


Yes it would be but I do not think most of them will hit land only like 1 or 2 of them the rest would curve in the CATL
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923. BurnedAfterPosting 04:27 PM GMT del 30 Luglio 2009    
Quoting mikatnight:


Yeah, think that's shootin' a little low. Have to go back to '86 for just 6.


To me it seems that with the way everything is just ready to boil, once we get the MJO in the Atlantic Basin, we will see 4 named storms in a short period of time. As futuremet said, upward motion will be here at the end of next week.
924. Chicklit 04:27 PM GMT del 30 Luglio 2009    


I am not saying another word since I have no idea what I'm talking about.
CapeVerde
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925. LPStormspotter 04:28 PM GMT del 30 Luglio 2009    
Quoting IKE:


IKE...



WOW. its so Beautiful...
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926. LPStormspotter 04:29 PM GMT del 30 Luglio 2009    
Quoting GBguy88:


Wow, that'll be a hellish two weeks if that comes into fruition.


It will be nuts here
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927. CybrTeddy 04:29 PM GMT del 30 Luglio 2009    
Quoting AussieStorm:

I have a feeling there might be a strong/major hurricane. Especially with the SST's in the GOM.


Aussie don't quote Ben, he's a troll.
As I said, 1997 had a way more powerful El Nino and they had 8 named. 2006 had a stronger El Nino and it had 10 named. 2009 has an El Nino at about to slightly stronger than in 2004. 11-13 named is more likely. No way we're getting less than 8.
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928. Cavin Rawlins 04:30 PM GMT del 30 Luglio 2009    
Tropical depression 06E will likely become tropical depression 01C later today. This is typical of El Nino years. Most recently, 2006 had the impressive long-lived Ioke, the longest lasting Central Pacific Storm. In 2004, which omost of know was not a classic El Nino, much of the warm watesr were displaced in the central Pacific, that season ended up with 7 tropical depressions

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929. AussieStorm 04:31 PM GMT del 30 Luglio 2009    
Quoting WeatherStudent:


Aussie, disregard those predictions ASAP my friend. He obviously has got no sense of crediable foundation whatsoever to back up those numerical predictions with. On the other hand, KMan is anticipating that we'll see either 2 or 3 major canes this year. So we'll see what evolves.


That's my feelings also. 0 major canes with such high temps in the GOM....lol. the TCHP would be off the scale.
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930. mikatnight 04:31 PM GMT del 30 Luglio 2009    
Quoting BurnedAfterPosting:


To me it seems that with the way everything is just ready to boil, once we get the MJO in the Atlantic Basin, we will see 4 named storms in a short period of time. As futuremet said, upward motion will be here at the end of next week.


Even if August is slow, there's been plenty of seasons with a bunch of Sept & Oct storms and little or nothing in the earlier months.
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931. IKE 04:32 PM GMT del 30 Luglio 2009    
Someone is not a troll because they pick a certain number of systems...that's how I feel...everyone has a right to a #.
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932. Drakoen 04:36 PM GMT del 30 Luglio 2009    
Nice TD:
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933. CybrTeddy 04:36 PM GMT del 30 Luglio 2009    
Quoting IKE:
Someone is not a troll because they pick a certain number of systems...that's how I feel...everyone has a right to a #.


Actually Ike, when someone just randomly spurts out numbers without placing fact into it or historical data that they know will cause an argument or drama, seems pretty trollish to me. Now, Im not refering to anyone in particular but its just a fact. Its always worked that way on here, either with Downcasting or wishcasting.
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935. IKE 04:37 PM GMT del 30 Luglio 2009    
Vorticity increased in the eastern Caribbean...

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936. mikatnight 04:37 PM GMT del 30 Luglio 2009    
Quoting IKE:
Someone is not a troll because they pick a certain number of systems...that's how I feel...everyone has a right to a #.


One is the lonliest number...
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937. AussieStorm 04:38 PM GMT del 30 Luglio 2009    
Quoting Drakoen:
Nice TD:

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938. IKE 04:38 PM GMT del 30 Luglio 2009    
Quoting CybrTeddy:


Actually Ike, when someone just randomly spurts out numbers without placing fact into it or historical data that they know will cause an argument or drama, seems pretty trollish to me. Now, Im not refering to anyone in particular but its just a fact. Its always worked that way on here, either with Downcasting or wishcasting.


He's picked 4-1-0 all year.

I picked 10-4-2. I based it on El Nino.

Not sure what his basis is...seems like he gave a reason. If not, he should give one...or 2...or whatever.
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939. BurnedAfterPosting 04:38 PM GMT del 30 Luglio 2009    
GFS continues to hang on to a system going out a week now, its hanging on to this one longer than previous ones
940. Cavin Rawlins 04:39 PM GMT del 30 Luglio 2009    
12Z GFS now developing a tropical cyclone from the broad area of low pressure currently between 30W and the African coast within the next week. We'll see if it keeps it.

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941. PanhandleChuck 04:39 PM GMT del 30 Luglio 2009    
Quoting IKE:
Someone is not a troll because they pick a certain number of systems...that's how I feel...everyone has a right to a #.


What's up Ike... Not being a troll 12 in August, 21 in September and 8 in October LOL
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942. Drakoen 04:39 PM GMT del 30 Luglio 2009    
Tropics remain quiet
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943. BurnedAfterPosting 04:39 PM GMT del 30 Luglio 2009    
Quoting IKE:


He's picked 4-1-0 all year.

I picked 10-4-2. I based it on El Nino.

Not sure what his basis is...seems like he gave a reason. If not, he should give one...or 2...or whatever.


He never gave a reason and never has given a reason even though people have asked for one, that is why they call him a troll.
944. AussieStorm 04:40 PM GMT del 30 Luglio 2009    
Quoting WeatherStudent:


Preciously.

What is the TCHP anyways?
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945. IKE 04:40 PM GMT del 30 Luglio 2009    
Quoting mikatnight:


One is the lonliest number...


fire it up...cued up for your listening pleasure...
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946. SomeRandomTexan 04:41 PM GMT del 30 Luglio 2009    
Ike... he has picked different numbers the whole time.. once he picked 0.0.0... but I am so over it. I dont even care...
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947. IKE 04:41 PM GMT del 30 Luglio 2009    
Quoting PanhandleChuck:


What's up Ike... Not being a troll 12 in August, 21 in September and 8 in October LOL


LOL!
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948. TampaSpin 04:42 PM GMT del 30 Luglio 2009    
Quoting IKE:
Vorticity increased in the eastern Caribbean...



Dont know if anything will get going in the dead zone....but shear is very low in that area also
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949. KEEPEROFTHEGATE (Mod) 04:42 PM GMT del 30 Luglio 2009    


ENTER CPAC
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950. Drakoen 04:42 PM GMT del 30 Luglio 2009    
I'm skeptical of the GFS forecast considering there are two lows involved. There is probably some convective feedback in that:
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951. CybrTeddy 04:42 PM GMT del 30 Luglio 2009    
Quoting IKE:


He's picked 4-1-0 all year.

I picked 10-4-2. I based it on El Nino.

Not sure what his basis is...seems like he gave a reason. If not, he should give one...or 2...or whatever.


Ike you gave a pretty good reason and opinion on this season and why you said 10, now Ben didn't. He's gone from 2-9 storms this year. Just decided to stay at 4 for a few weeks. Besides, does it really matter how many storms we get if we get (god hope not) a Category 5 US landfall that causes Billions of dollars in damages.
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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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