STORM2K

Posted: **Sun Aug 27, 2006 8:08 pm**

What's the longest a TC has ever lasted as a Cat 4/5? Thanks.

Posted: **Sun Aug 27, 2006 8:56 pm**

Once again, as I always do, I have consulted the NHC FAQ and have come up with this: Longest Lasting Cat 5 By Basin
Hope that helps

Posted: **Sun Aug 27, 2006 9:10 pm**

brunota2003 wrote:Once again, as I always do, I have consulted the NHC FAQ and have come up with this: Longest Lasting Cat 5 By Basin
Hope that helps

Thanks, but longest lasting Cat 4/5, not just 5. :wink:

Posted: **Sun Aug 27, 2006 10:40 pm**

Hate to do this, but may I suggest a search of the BT data? That'll keep you plenty busy. 8-)

Seriously, though, I can't think of a easier way.

Posted: **Sun Aug 27, 2006 10:53 pm**

This is what I've found

Longest Category 5 hurricane: Hurricane Allen, 1980, reached Category 5 status on 3 occasions (Ivan and Isabel did the same, but Allen lasted longer). Dog 1950 2.50 days; Isabel 2003, David 1979, Mitch 1998 all 1.75 days.

http://www.hurricane.com/hurricane-records.php

http://en.wikipedia.org/wiki/Hurricane_Allen

Think it lasted for about 3 days.

Posted: **Sun Aug 27, 2006 11:39 pm**

I think my title is confusing. Longest lasting as a storm that's at least a Cat 4.

Posted: **Mon Aug 28, 2006 12:22 am**

since 1970 these are the storms that spent the longest amount of time of at least 115 kts per the unisys best track in ATlantic Basin

Ivan (2004) - 8.25 days
Isabel (2003) - 6.5 days
Luis (1995) - 6 days
Allen (1980) - 5.75 days
Edouard (1996) - 5 days
David (1979) - 4.25 days
Frances (2004) - 3.75 days
Gert (1999) - 3.50 days
Hugo (1989) - 3.50 days
Mitch (1998) - 3.25 days
Wilma (2005) - 3.25 days
Andrew (1992) - 3.25 days
Fabian (2003) - 3 days

Posted: **Mon Aug 28, 2006 5:53 pm**

Thanks Mark. I just did some calculations and realized that Ioke was not going to break that record even if it maintained Cat 4+ strength for 5 days, so why did CPHC say it would?

Posted: **Mon Aug 28, 2006 6:36 pm**

wxmann_91 wrote:Thanks Mark. I just did some calculations and realized that Ioke was not going to break that record even if it maintained Cat 4+ strength for 5 days, so why did CPHC say it would?

Were they talking about the record for the world or the CPAC record?

Posted: **Mon Aug 28, 2006 6:39 pm**

brunota2003 wrote:
wxmann_91 wrote:Thanks Mark. I just did some calculations and realized that Ioke was not going to break that record even if it maintained Cat 4+ strength for 5 days, so why did CPHC say it would?
Were they talking about the record for the world or the CPAC record?

AS FAR AS INTENSITY...LOOKING AT CURRENT ENVIRONMENTAL WIND FIELDS AROUND IOKE AND HOW IT IS RESPONDING...BY INTENSIFYING...THE STORM WILL LIKELY REMAIN A CATEGORY 4 OR 5 STORM FOR THE NEXT SEVERAL DAYS. EYEWALL REPLACEMENT CYCLES MAY BRING PERIODIC FLUCTUATIONS IN INTENSITY...HOWEVER THERE IS NO CLEAR EVIDENCE FOR ANY SIGNIFICANT CHANGE IN THE OVERALL STORM ENVIRONMENT. ANOMALOUSLY STRONG MID AND UPPER LEVEL CYCLONES AT ABOUT 150W AND 155E FLANK A HUGE ANTICYCLONE COVERING THE MID PACIFIC...AND IOKE WILL LIKELY CONTINUE TO BENEFIT FROM THE RESULTING LOW SHEAR AND FAVORABLE OUTFLOW PATTERN. IN ADDITION...SST VALUES WARM TO 29C ALONG THE TRACK. IF INDEED IOKE MAINTAINS CATEGORY 4 OR 5 STATUS FOR THE NEXT 96 HOURS...A PRELIMINARY SURVEY OF THE RECORDS SHOW THAT THIS COULD BE A WORLD RECORD FOR LONGEVITY OF A CATEGORY 4 OR GREATER STORM.

Posted: **Mon Aug 28, 2006 7:33 pm**

wxmann_91 wrote:Thanks Mark. I just did some calculations and realized that Ioke was not going to break that record even if it maintained Cat 4+ strength for 5 days, so why did CPHC say it would?

Maybe they meant consecutive?

Posted: **Mon Aug 28, 2006 8:21 pm**

Ivan lasted pretty long as a Cat 4+ without weakening below.

Posted: **Mon Aug 28, 2006 8:46 pm**

I would imagine the record is held in the West Pacific, but I have no idea what storm. If I could take a guess, I would have to go with Super Typhoon Rita from 1981, IIRC. IIRC, it was a hurricane/typhoon for 17 days, but I’m not sure about how many days it held its intensity at cat 4/5.

Posted: **Mon Aug 28, 2006 10:38 pm**

wxmann_91 wrote:Thanks Mark. I just did some calculations and realized that Ioke was not going to break that record even if it maintained Cat 4+ strength for 5 days, so why did CPHC say it would?

They said that after it was one for two or three days already, which would make sense if Ivan happens to be the current record holder, though I doubt that is true. But that's my best explanation.

And calamity, no storm in 81 last as a typhoon more than 6 days, so I went and looked Rita up. Rita was 1978, held typhoon status for exactly 7 days, of which exactly 3 straight were at Cat 5 and 4.5 as a Cat 4+.

IOW, Ioke whips Rita badly.

Posted: **Mon Aug 28, 2006 11:25 pm**

Nancy 1961 lasted 5.5 consecutive days as a Cat 5.

http://weather.unisys.com/hurricane/w_p ... /track.gif

Longer as a Cat 4. So, even consectutively, (the disco said 96 hours), Ioke would not break Nancy's record.

Posted: **Wed Aug 30, 2006 10:33 am**

I didn't think 5.5 days as a Cat 5 was possible? I thought eyewall replacement cycles or something would have fluctated it down every so often.

Is that storm in the time frame where the records of maximum intensity are considered suspect in the Pacific?

Posted: **Wed Aug 30, 2006 5:51 pm**

Is that storm in the time frame where the records of maximum intensity are considered suspect in the Pacific?

Yeah, probably. Nevertheless, it is in the official records.

Posted: **Sun Sep 03, 2006 10:50 am**

STORM2K

Longest Lasting Cat 4/5?

Longest Lasting Cat 4/5?