Dr. Jeff Masters' WunderBlog

Hurricane Hunters to check out remains of Fred; 98L more organized
Posted by: Dr. Jeff Masters, 1:06 PM GMT op 19 september 2009 +1
A tropical disturbance (98L), is located midway between Africa and the Lesser Antilles Islands. This disturbance has shown a modest increase in heavy thunderstorm activity over the past day. This morning's QuikSCAT pass showed an elongated circulation, with top winds around 30 mph. Wind shear is low, 5 - 10 knots, and Sea Surface Temperatures are 28°C, which is about 2°C above the 26°C threshold needed to support a tropical cyclone. There is a large amount of dry air to the north and west of 98L, and this dry air is interfering with development.

Wind shear over 98L is expected to remain in the low range, 5 - 10 knots, through Sunday evening, according to the SHIPS model. This may allow the storm to organize into a tropical depression, assuming it can fight off the dry air that surrounds it. By Monday, the SHIPS model predicts shear will increase to the high range, 15 - 30 knots, so in is unlikely 98L will become anything stronger thatn a weak tropical storm over the coming 5-day period. The models predict that a strong trough of low pressure will turn 98L to the northwest and then north beginning on Monday, with the result that 98L misses the Lesser Antilles Islands by at least 500 miles. NHC is giving 98L a high (greater than 50%) chance of developing into a tropical depression by Monday. At this time, it does not appear that 98L will ever threaten any land areas.

Fred-ex
The remains of Hurricane Fred are still spinning away about 700 miles east of Florida. There has been a modest increase in heavy thunderstorm activity on the south side of Fred's circulation over the past day, but high wind shear and dry air have kept the thunderstorms from building over Fred's center. Wind shear is moderate, 15 - 20 knots, and there is substantial dry air surrounding ex-Fred on all sides. This morning's QuikSCAT pass showed top winds of 30 mph.

None of the computer models develop ex-Fred, and conditions for development are expected to remain marginal over the next three days, with wind shear of 15 - 20 knots and plenty of dry air around. Most of the models predict ex-Fred should move over Florida on Tuesday, but steering currents may weaken early next week, and ex-Fred could end up slowing down and turning northwest towards South Carolina. A hurricane hunter aircraft this afternoon was cancelled.


Figure 1. Morning visible satellite image of 98L and the remains of Hurricane Fred.

Twenty years ago today
On September 19, 1989, Hurricane Hugo moved away from Puerto Rico, and headed northwest at 15 mph. An upper-level low over Georgia, in combination with the steering currents imparted by the Azores-Bermuda High, were responsible for the northwesterly motion of the storm. Wind shear from strong upper-level winds continued to weaken the hurricane, and Hugo diminished to a Category 2 hurricane with 105 mph winds.


Figure 2. GOES visible satellite image of Hurricane Hugo taken on September 19, 1989. Wind shear had weakened Hugo to a Category 2 storm with 105 mph winds. Image credit: Google Earth rendition of the NOAA HURSAT data base.

I'll have an update this afternoon if there's any major developments to report.

Jeff Masters
Categories: Hurricane
  Permalink | A A A
Reader Comments
Display: 0, 50, 100, 200 Sort: Newest First - Order Posted
Viewing: 1201 - 1251

Page: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33Blog Index

1201. Orcasystems 3:16 AM GMT op 20 september 2009    
Blog Update
Reflector site for those at work, includes Dr. Masters & Weather456, daily update.


AOI

AOI

AOI

AOI
Member Since: 1 oktober 2007 Posts: 77 Comments: 26077
1202. Grothar 3:17 AM GMT op 20 september 2009    
Quoting BahaHurican:
Storms change names from ATL to PAC because it is a different basin. Storms that pass from EPac to CPac to WPac generally keep the same name. Best example I can remember is the longlived hurricane John of 1994. Here is what I found at wikipedia abt this storm.

Hurricane John (also known as Typhoon John, international designation: 9420, JTWC designation: 10E) formed during the 1994 Pacific hurricane season and became both the longest-lasting and the farthest-traveling tropical cyclone ever observed. John formed during the strong El Niño of 1991 to 1994 and peaked as a Category 5 hurricane on the Saffir-Simpson Hurricane Scale, the highest categorization for hurricanes.

Over the course of its existence, it followed a 13,000 kilometres (8,100 mi) path from the eastern Pacific to the western Pacific and back to the central Pacific, lasting 31 days in total.[1] Because it existed in both the eastern and western Pacific, John was one of a small number of tropical cyclones to be designated as both a hurricane and a typhoon. Despite lasting for a full month, John barely affected land at all, bringing only minimal effects to the Hawaiian islands and a United States military base on Johnston Atoll.



HaHA Baha! I finally beat you at something. Look at post 1184. Are these questions making you a little sea-sick, like I am?
Member Since: 17 juli 2009 Posts: 57 Comments: 19554
1203. Skyepony (Mod) 3:18 AM GMT op 20 september 2009    
Quoting CosmicEvents:

Yea....but if he somehow restrengthens enough to be a TD, even for 3 hours, then the average margin of error goes up to 3000+ miles for all the models...except bam-bam. That's going back 14 days, but I would think that a 3000 mile "miss" would set the record......



Actually the -1s going across there means the model wasn't run specifically on Fred that day... Model wasn't run.. there is no error.
Member Since: 10 augustus 2005 Posts: 144 Comments: 29374
1204. BahaHurican 3:19 AM GMT op 20 september 2009    
But my storm was more "fun" than yours, Grothar... John was cool as an example of how a recordsetting cat 5 hurricane can be one with an unretired name.... lol
Member Since: 25 oktober 2005 Posts: 19 Comments: 17688
1205. foggymyst 3:19 AM GMT op 20 september 2009    
Tampa, ts AFTER it crosses fla?
Member Since: 23 september 2008 Posts: 0 Comments: 383
1208. IKE 3:21 AM GMT op 20 september 2009    
Buoy 41047, right near the remnant, is capturing the full effects of the remnant trough/artist, formerly known as Fred....

Wind Direction (WDIR): N ( 350 deg true )
5-day plot - Wind Speed Wind Speed (WSPD): 13.6 kts
5-day plot - Wind Gust Wind Gust (GST): 15.5 kts
5-day plot - Wave Height Wave Height (WVHT): 5.6 ft
5-day plot - Dominant Wave Period Dominant Wave Period (DPD): 9 sec
5-day plot - Average Period Average Period (APD): 5.7 sec
5-day plot - Mean Wave Direction Mean Wave Direction (MWD): E ( 84 deg true )
5-day plot - Atmospheric Pressure Atmospheric Pressure (PRES): 29.99 in
5-day plot - Pressure Tendency Pressure Tendency (PTDY): 0.01 in ( Rising )
5-day plot - Air Temperature Air Temperature (ATMP): 81.9 %uFFFDF
5-day plot - Water Temperature Water Temperature (WTMP): 83.3 %uFFFDF
5-day plot - Dew Point Dew Point (DEWP): 74.7 %uFFFDF
5-day plot - Heat Index Heat Index (HEAT): 88.2 %uFFFDF


Quoting foggymyst:
Tampa, ts AFTER it crossed fla?


I wonder if Floridians are putting up their shutters tonight?
Member Since: 9 juni 2005 Posts: 23 Comments: 37047
1209. Seasidecove 3:21 AM GMT op 20 september 2009    
BahaHurican--

"Storms change names from ATL to PAC because it is a different basin. Storms that pass from EPac to CPac to WPac generally keep the same name. Best example I can remember is the longlived hurricane John of 1994. Here is what I found at wikipedia abt this storm."


Thanks for the info, I didn't know, that as althought it is the Pacific Basin as a whole.

As to whether since we had East Pacific, Central Pacfic, and Far East Pacific Cyclone offices, as to whether the East/Central might be different as far as naming goes from that of the Far East Pacific. Thankx Again! :-)
Member Since: 21 juni 2009 Posts: 0 Comments: 78
1210. reedzone 3:22 AM GMT op 20 september 2009    
Well 07L did it again, deep burst convection to nothing. However, it is still in 5-10 knots, but hasn't taken advantage. DMAX is it's only hope for regeneration in my opinion.
Member Since: 1 juli 2008 Posts: 13 Comments: 7247
1212. zebralove 3:22 AM GMT op 20 september 2009    
ok baha and grother give me an example of one going from the atlantic into the pacific and what that does with the name change. Thanks you guys are helping me learn and making me laugh all at the same time!
Member Since: 27 juli 2009 Posts: 3 Comments: 94
1213. foggymyst 3:22 AM GMT op 20 september 2009    
Dakster..cute.. Ike, I am not :p
Member Since: 23 september 2008 Posts: 0 Comments: 383
1214. Dakster 3:22 AM GMT op 20 september 2009    
IKE - Only for those that have an insurance mitigatrion inspection...

Have they started evac'ing your area for Cat 5 Fred yet?
Member Since: 10 maart 2006 Posts: 0 Comments: 4942
1216. IKE 3:24 AM GMT op 20 september 2009    
Quoting Dakster:
IKE - Only for those that have an insurance mitigatrion inspection...

Have they started evac'ing your area for Cat 5 Fred yet?


Yup...they all headed to Tennessee and points north. I've boarded up and will be leaving early AM.
Member Since: 9 juni 2005 Posts: 23 Comments: 37047
1218. Dakster 3:26 AM GMT op 20 september 2009    
Quoting IKE:


Yup...they all headed to Tennessee and points north. I've boarded up and will be leaving early AM.


Wow.. You are taking it seriously, evacuating all the way back to the United States...
Member Since: 10 maart 2006 Posts: 0 Comments: 4942
1219. AllStar17 3:26 AM GMT op 20 september 2009    
***9/19/2009 Tropics Question of the Day FINAL RESULTS***
A - 3
B - 6 (Majority = Final Answer)
C - 3
D - 1

Member Since: 29 juni 2009 Posts: 13 Comments: 5135
1220. will40 3:26 AM GMT op 20 september 2009    
Quoting IKE:


Yup...they all headed to Tennessee and points north. I've boarded up and will be leaving early AM.
Dont bring you know who bud with ya lmao
Member Since: 19 september 2005 Posts: 2 Comments: 3439
1221. IKE 3:26 AM GMT op 20 september 2009    
Last visible before blackout. Fred is the baby spec, centered near 26N and 71W. I zoomed in for the full effects....

Member Since: 9 juni 2005 Posts: 23 Comments: 37047
1222. robie1conobie 3:27 AM GMT op 20 september 2009    
Quoting tacoman:
reed you still trying to pull fred from his grave let him RIP..
i see pink taco still has nothing informative to type.
Member Since: 19 mei 2009 Posts: 0 Comments: 103
1223. Seasidecove 3:27 AM GMT op 20 september 2009    
Fred = Pop-up Thunder showers, typical coastal afternoon shower. They pop up rain heavy for about 30 min to an hour then disappear, only to reappear the next day around the same time.

Member Since: 21 juni 2009 Posts: 0 Comments: 78
1224. Jerrob 3:27 AM GMT op 20 september 2009    
Quoting IKE:
Buoy 41047, right near the remnant, is capturing the full effects of the remnant trough/artist, formerly known as Fred....

Wind Direction (WDIR): N ( 350 deg true )
5-day plot - Wind Speed Wind Speed (WSPD): 13.6 kts
5-day plot - Wind Gust Wind Gust (GST): 15.5 kts
5-day plot - Wave Height Wave Height (WVHT): 5.6 ft
5-day plot - Dominant Wave Period Dominant Wave Period (DPD): 9 sec
5-day plot - Average Period Average Period (APD): 5.7 sec
5-day plot - Mean Wave Direction Mean Wave Direction (MWD): E ( 84 deg true )
5-day plot - Atmospheric Pressure Atmospheric Pressure (PRES): 29.99 in
5-day plot - Pressure Tendency Pressure Tendency (PTDY): 0.01 in ( Rising )
5-day plot - Air Temperature Air Temperature (ATMP): 81.9 %uFFFDF
5-day plot - Water Temperature Water Temperature (WTMP): 83.3 %uFFFDF
5-day plot - Dew Point Dew Point (DEWP): 74.7 %uFFFDF
5-day plot - Heat Index Heat Index (HEAT): 88.2 %uFFFDF




I wonder if Floridians are putting up their shutters tonight?
LOL! no we are not!
Member Since: 10 augustus 2005 Posts: 0 Comments: 173
1225. IKE 3:29 AM GMT op 20 september 2009    
Quoting Dakster:


Wow.. You are taking it seriously, evacuating all the way back to the United States...


Yup...we're lettin em have it.


Quoting will40:
Dont bring you know who bud with ya lmao


He's the only one left in south Florida. He's sitting in a lounge chair on the beach waiting for it.
Member Since: 9 juni 2005 Posts: 23 Comments: 37047
1226. will40 3:30 AM GMT op 20 september 2009    
Ha Ha Ike
Member Since: 19 september 2005 Posts: 2 Comments: 3439
1228. Grothar 3:30 AM GMT op 20 september 2009    
Quoting AllStar17:
***9/19/2009 Tropics Question of the Day FINAL RESULTS***
A - 3
B - 6 (Majority = Final Answer)
C - 3
D - 1



Want to look over the answer again Allstar?
Member Since: 17 juli 2009 Posts: 57 Comments: 19554
1229. TexasHurricane 3:30 AM GMT op 20 september 2009    
Quoting TampaSpin:


Yes in the GOM....Its just my opinion...there is a cold front coming that will erode the West side of the High and also a MidLevel spin coming out of the Caribbean into the GOM about the same time.....as those that have read my WebSite update the combination of the 3 i am calling the minature Perfect Storm.


and if this was to happen, you would say it would go to the eastern or western side of the GOM?
Member Since: 2 juli 2009 Posts: 0 Comments: 2811
1230. insuranceguy67 3:31 AM GMT op 20 september 2009    
1231. will40 3:32 AM GMT op 20 september 2009    
IKE check mail
Member Since: 19 september 2005 Posts: 2 Comments: 3439
1232. Seasidecove 3:32 AM GMT op 20 september 2009    
Since 1953, the following seasons have had no names retired from that season: 1953, 1956, 1958, 1962, 1968, 1971, 1973, 1976, 1978, 1981, 1982, 1984, 1986, 1987, 1993, 1994, 1997 and 2006.
Member Since: 21 juni 2009 Posts: 0 Comments: 78
1235. Dakster 3:34 AM GMT op 20 september 2009    
Quoting KerryInNOLA:
So you're saying exFred is going to pull a Katrina? What do you base this on? Should I go to Home Depot for supplies now? Why are the local mets saying nothing?


Ummm. The j/k at the end means JUST KIDDING. Ike and I were having a little tit for tat...
Member Since: 10 maart 2006 Posts: 0 Comments: 4942
1236. Grothar 3:35 AM GMT op 20 september 2009    
Theoretically, a hurricane or tropical storm of any strength can have its name retired; retirement is based entirely on the level of damage caused by a storm. However, until 1972, no Category 1 hurricane had its name retired, and no named tropical storm had its name retired until 2001. This is at least partially due to the fact that weaker storms tend to cause less damage, and the few weak storms that have had their names retired caused most of their destruction through heavy rainfall rather than winds.

Since 1953, 73 storms have had their names retired. Of these, two (Carol and Edna) were reused after the storm for which they were retired but were later retroactively retired, and two others (Hilda and Janet) were included on later lists of storm names but were not reused before being retroactively retired. Historical records are unclear on the status of Gracie from the 1959 season. The official NHC site does not report Gracie as a retired name,[2] but it is widely referred to as retired, including by other official sources.[3]

If all the names on a season's normal list are used up, storms are then named after the letters of the Greek alphabet (Alpha, Beta, Gamma, etc.) Unlike the normal names, these cannot be retired. If a storm with a Greek name manages to reach the strength and have the impact that would otherwise lead to retirement, the Greek letter would be listed among the retired names with a footnote stating that the name would still be in use for future storms.

Since 1953, the following seasons have had no names retired from that season: 1953, 1956, 1958, 1962, 1968, 1971, 1973, 1976, 1978, 1981, 1982, 1984, 1986, 1987, 1993, 1994, 1997 and 2006.

Count em 18 not 17
Member Since: 17 juli 2009 Posts: 57 Comments: 19554
1238. robie1conobie 3:36 AM GMT op 20 september 2009    
Quoting TampaSpin:


YOur an example why i hate many on the F'n blog!
don't worry about him tampa; he has been singling u out since yesterday for some reason? he never has any decent ?'s or facts to add to this blog. hopefully admin will ban him soon!
Member Since: 19 mei 2009 Posts: 0 Comments: 103
1239. IKE 3:38 AM GMT op 20 september 2009    
In all seriousness, the NHC would do this blog a big favor by dropping the remnant trough on the next TWO. There's nothing left to keep giving it a yellow circle.
Member Since: 9 juni 2005 Posts: 23 Comments: 37047
1240. Dakster 3:39 AM GMT op 20 september 2009    
IKE - Either that or color the WHOLE basin in yellow. Afterall, yellow means 0%-30%.
Member Since: 10 maart 2006 Posts: 0 Comments: 4942
1241. presslord 3:39 AM GMT op 20 september 2009    
Quoting WeatherStudent:
It's absolutely surreal to think that this country might go 4 consecutive years, back-to-back without receiving the direct impact of a major cane; however, when we are finally threaten by a major hurricane, I dred and fear to say, that it'll prob be a catastrophic one. A final FYI: of course, the last major cane to affect the Conus was Hurricane Wilma, on Oct. 21st, 2005, which affected SW Florida, as we all remember. In closing, time will tell, we'll see what materializes. This period of extraordinary luck will end, my fear is that when it does come to an end, when ever that just happens to be that is, it'll be in a very, very big way. Thoughts, everyone?


Did you miss the whole Ike thing last year? Really...get some help...
Member Since: 13 augustus 2007 Posts: 0 Comments: 10377
1242. Patrap 3:40 AM GMT op 20 september 2009    
When using Dr. Masters' blog, please refrain from posting material not relevant to the discussion of tropical weather, or the topic of the blog entry itself.

Please do not engage in personal attacks or bickering. Material not conforming to these standards should be flagged with the button and ignored.

Rules of the Road — How to ignore a blogger


During active periods of hurricane season, these rules will be strictly enforced. Violations will be met with a minimum 24 hour ban.


98L 00 Z Statistical/Simple Models (CLIPER,BAMs,LBAR,other Statistical Models)

Member Since: 3 juli 2005 Posts: 372 Comments: 111633
1244. reedzone 3:40 AM GMT op 20 september 2009    
Quoting IKE:
In all seriousness, the NHC would do this blog a big favor by dropping the remnant trough on the next TWO. There's nothing left to keep giving it a yellow circle.


You could be right, even though it's yet again blowing new convection, it just isn't going. It would put the blog to rest :)
Member Since: 1 juli 2008 Posts: 13 Comments: 7247
1245. BahaHurican 3:40 AM GMT op 20 september 2009    
Quoting Seasidecove:
BahaHurican--

"Storms change names from ATL to PAC because it is a different basin. Storms that pass from EPac to CPac to WPac generally keep the same name. Best example I can remember is the longlived hurricane John of 1994. Here is what I found at wikipedia abt this storm."


Thanks for the info, I didn't know, that as althought it is the Pacific Basin as a whole.

As to whether since we had East Pacific, Central Pacfic, and Far East Pacific Cyclone offices, as to whether the East/Central might be different as far as naming goes from that of the Far East Pacific. Thankx Again! :-)
I know each area operates its own list of names. But when one crosses into the other[s], the name is continued. I suppose it would be true of the ATL / EPac, but most of the time storms just don't survive the crossing. So they get redesignated...
Member Since: 25 oktober 2005 Posts: 19 Comments: 17688
1246. Skyepony (Mod) 3:40 AM GMT op 20 september 2009    
I thought that may be chaff.. Surprised the local (MLB) confirms..

ONLY ECHOES SHOWING UP ON RADAR OVER EC FL AND ADJACENT ATLC ARE
NON-PRECIPITATION ECHOES AT THIS TIME. WHAT APPEARS TO BE A SMOKE
PLUME ACROSS NW VOLUSIA/N LAKE AND EASTERN MARION FINALLY APPEARS TO
BE THINNING. AND ECHOES OFFSHORE VOLUSIA COUNTY ARE LIKELY CHAFF.
HAVE REMOVED RAIN CHANCES FOR THE INTERIOR BUT KEPT A 20% POP FOR
THE COAST AS ADDITIONAL SHOWERS SHOULD REDEVELOP OVER THE ATLC
PREFERABLY ALG CONVERGENT LINES...AND ONSHORE FLOW SHOULD BRING A
FEW TO THE COAST.

$$

KELLY


I'm using restraint in not ranting about having clouds of god knows what being sprayed about.. Wonder if it has anything to do with Fred-ex..
Member Since: 10 augustus 2005 Posts: 144 Comments: 29374
1247. Skyepony (Mod) 3:41 AM GMT op 20 september 2009    
or this trough.. we've had really neat clouds, sunset color was a rare shade..
Member Since: 10 augustus 2005 Posts: 144 Comments: 29374
1248. Patrap 3:41 AM GMT op 20 september 2009    
98L 00 Z Dynamic Models (More sophisticated models)



Member Since: 3 juli 2005 Posts: 372 Comments: 111633
1249. PortABeachBum 3:41 AM GMT op 20 september 2009    
Quoting reedzone:


You could be right, even though it's yet again blowing new convection, it just isn't going. It would put the blog to rest :)
The NHC is not in the business of "doing this blog a favor."
Member Since: 4 oktober 2007 Posts: 0 Comments: 198
1250. Dakster 3:42 AM GMT op 20 september 2009    
Quoting Skyepony:
or this trough.. we've had really neat clouds, sunset color was a rare shade..


Yeah, the colors in South Florida have been neat. Although tonight it looked like Tornado weather. The color was so surreal.

It was a break from the RAIN ALL DAY LONG here.
Member Since: 10 maart 2006 Posts: 0 Comments: 4942
1251. JLPR 3:43 AM GMT op 20 september 2009    
98L looking really sad before blackout =P
lets see how it looks after it


Member Since: 4 september 2007 Posts: 36 Comments: 5223

Viewing: 1201 - 1251

Page: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33Blog Index

New Comment
Community Standards Policy Comments will take a few seconds to appear.
Post Your Comments
Please sign in to post comments.
Not only will you be able to leave comments on this blog, but you'll also have the ability to upload and share your photos in our Wunder Photos section.
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.

Community Activity