Dr. Jeff Masters' WunderBlog

Adieu to Danny
Posted by: Dr. Jeff Masters, 9:50 AM GMT en Agosto 29, 2009 +0
Hi, Dr. Rob Carver filling in for Dr. Masters. With the 5AM EST update, NHC has discontinued issuing the tropical storm watches and will no longer issue any updates about the storm. Danny has gone extratropical and has merged with a frontal low off the Carolina coast. The most recent aircraft reconnaissance flight was unable to find a cyclonic circulation or tropical storm force winds in the remnants of Danny.

That isn't to say that Danny's remnants don't pose an element of risk for the East Coast. High surf from large swells is expected along the East Coast. New England can expect to see a lot of rain as Denny's remnants fly by.

Invest 94L

Invest 94L is still out near South America, but it's convective activity seems to be cycling down right now. The global models (GFS and GEM) do pull 94L (to be precise, a feature that could be 94L) north of the Lesser Antilles. Given how the GFDL has performed with other Invests this season, I can wait a day or so before they run the GFDL for this storm.

East Pacific and elsewhere

For those of you wanting to look at tropical storms, Jimena has just formed in the Eastern Pacific basin. The track uncertainty is fairly large, so I'll be keeping an eye on this storm to see if it will impact Mexico or the American Southwest. In the Western Pacific, Tropical Storm Krovahn looks like it will be grazing the Japanese coastline just east of Tokyo Bay.

I'll give Invest94L a chance to see the Sun and then I'll update this entry.

Update:1545 EDT

G'afternoon everybody, Invest94L has perked up a little since this's morning blog entry. In my judgment, the extent and peak magnitude of convection has increased, and scatterometer data shows that Invest94L has a weak cyclonic circulation. Here's the 9Z ascending pass:

Quickscat Pass over Invest94L
Figure 1Ascending Quikscat pass centered over Invest94L at 9Z Aug 29 2009.

There will be a big update tonight after the 00Z model cycle data comes in.
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901. BurnedAfterPosting 9:26 PM GMT en Agosto 29, 2009    
Quoting jipmg:
LOL at invest 94 in the pacific, the models are completely lunatic..


why are they lunatic?
902. CaribBoy 9:26 PM GMT en Agosto 29, 2009    
Is 94L coming back?
Member Since: Octubre 6, 2007 Posts: 0 Comments: 2854
903. stormpetrol 9:26 PM GMT en Agosto 29, 2009    
Link
Sorry I was off with the Ivan forcast, but it was for casted to go further north than it actually did.
Member Since: Abril 29, 2007 Posts: 0 Comments: 6400
904. StadiumEffect 9:26 PM GMT en Agosto 29, 2009    
Quoting stormwatcherCI:
I don't mean at the moment. Are you from here or do you live here ?


I'm from Cayman and live in Cayman, but I'm just in Miami for another few months to finish up with my degree.
905. gordydunnot 9:27 PM GMT en Agosto 29, 2009    
A little convection forming on stalled front in S. central gulf. Good shear though.
Member Since: Agosto 18, 2008 Posts: 0 Comments: 3044
906. extreme236 9:27 PM GMT en Agosto 29, 2009    
Quoting jipmg:
LOL at invest 94 in the pacific, the models are completely lunatic..


There is no invest 94E.
Member Since: Agosto 2, 2007 Posts: 19 Comments: 19234
907. BurnedAfterPosting 9:28 PM GMT en Agosto 29, 2009    
94E is now Hurricane Jimena and those models are very much in line with the NHC forecast
909. StormFreakyisher 9:28 PM GMT en Agosto 29, 2009    
Quoting DM21Altestic:
not to mention, Felix was a 94L at the SAME TIME OF YEAR.

also, the East Coast is northcasting, 'cause it's going Florida points southward!

I know but I am talking about this 2009 hurricane season, not last year or before that.
Member Since: Mayo 16, 2009 Posts: 0 Comments: 684
910. extreme236 9:30 PM GMT en Agosto 29, 2009    
Quoting DM21Altestic:
I'm not incorrect, Extreme...unless you're saying that Aug 29 is a different timeframe then Aug 31...I was saying, general time of year...


Your comparing two systems that aren't anything alike except for invest number. There are different forces at work here this time around.
Member Since: Agosto 2, 2007 Posts: 19 Comments: 19234
911. stormwatcherCI 9:30 PM GMT en Agosto 29, 2009    
I don't know how to post links but some of you might find this interesting.View the assembly diagram, piece by piece.



I had no idea the Space Station had grown to this size.




http://i.usatoday.net/tech/graphics/iss_timeline/flash.htm
Member Since: Octubre 9, 2008 Posts: 0 Comments: 8040
912. jipmg 9:30 PM GMT en Agosto 29, 2009    
Quoting extreme236:


There is no invest 94E.


yes I know, the page was showing an old link, im just saying it was sort of interesting how back before it turned into a full blown storm the models were everywhere
913. SouthALWX 9:30 PM GMT en Agosto 29, 2009    
Experimental season outlook:

Given the generalised pattern as of late with a strong east coast trough, typical of el nino, the persistent thunderstorm activity in the Epac causing downward-west winds to induce shear and stability in the caribbean and gulf, also typical of elnino,as well as the near average long term and below average near term OHC it seems a below to near average season is the correct guess, atleast in the ACE aspect. An above average number of minimal hurricanes and tropical storms are possible but intense and major hurricanes should remain well displaced from land should they occur with the possible exception being the east coast. If the thunderstorm activity dies down in the EPAC we may see a late season resurgence but at this point an early ending season looks likely. Looking past tropical season, it looks like a more active winter season than we've had lately is possible with above average rainfall and near to below average temps on the east coast with the opposite effect on the west coast, though that estimation is based solely on an expected elnino induced east coast troughing.
- credit to Dr. Blackwell for showing me my ideas actually held water in the physics world.
Member Since: Agosto 27, 2008 Posts: 0 Comments: 1497
914. jipmg 9:31 PM GMT en Agosto 29, 2009    
Sorry I meant "invest 95"

http://www.wunderground.com/tropical/tracking/ep200995_model.html
915. stormwatcherCI 9:32 PM GMT en Agosto 29, 2009    
Quoting StadiumEffect:


I'm from Cayman and live in Cayman, but I'm just in Miami for another few months to finish up with my degree.
Good luck with that. Where are you, FIU or UofM ?
Member Since: Octubre 9, 2008 Posts: 0 Comments: 8040
916. Relix 9:33 PM GMT en Agosto 29, 2009    
Quoting Drakoen:
Relix, the trough advecting off the eastern seaboard will push the high backwards and induce more northerly movement of 94L


I see. I heard last night the through was going to stall a bit. Also, would the fast movement of 94L help it get further west before getting pulled?

Tracking is fun haha
Member Since: Agosto 3, 2006 Posts: 0 Comments: 2358
920. Tazmanian 9:36 PM GMT en Agosto 29, 2009    
95E is now Kevin
Member Since: Mayo 21, 2006 Posts: 5088 Comments: 111355
921. Drakoen 9:36 PM GMT en Agosto 29, 2009    
Hopefully we will get a Quickscat pass this evening to an idea of the exact location and strength.
Member Since: Octubre 28, 2006 Posts: 57 Comments: 29010
924. StadiumEffect 9:37 PM GMT en Agosto 29, 2009    
Quoting stormwatcherCI:
Good luck with that. Where are you, FIU or UofM ?


Thanks. I'm at FIU
925. Tazmanian 9:38 PM GMT en Agosto 29, 2009    
Quoting DM21Altestic:
Taz, when will 94L develop?



i dont no
Member Since: Mayo 21, 2006 Posts: 5088 Comments: 111355
926. TheDawnAwakening 9:39 PM GMT en Agosto 29, 2009    
Look this hurricane season is not 2007. This is the hurricane season of 2009. Unfavorable conditions have existed for a while now in the Caribbean Sea and Gulf of Mexico. Too much shear with an upper level low situated over the NW Caribbean Sea keeping shear axises in place to its west and east keeping that area in check. Also with upper level lows and troughs come dry and colder air as well as descending air as colder air aloft is denser keeping a lid on convection. Right now the most favorable area for a storm to intensify and stay alive is to the south of the Atlantic ridge and to the north of the islands of the Caribbean. A track most of the storms this year have taken, although there has only been 4. 2007 was more favorable in the Caribbean Sea. Two category five hurricanes almost taking the same path is unheard of and this is what makes 2007-2007 and 2009-2009. An el nino is now stronger than what it was in 2007 therefore keeping upper level lows and tutts in the area keeping storms at a minimum, only real exception was Bill this year and he had no landfall on anyone. Although his waves were strong and resulted in the deaths of people. A Bill like track with a more favorable atmosphere and a further west track is in store with the high forecasted to stay strong. A track like hurricane Andrew is possible as 94L initially takes a NW track missing the Lesser Antilles and Greater Antilles and perhaps then turning more to the west favoring a closer encounter of the US East Coast. This has a stronger impact potential then Bill and Danny, given possibly more favorable intensity forecasts and conditions with a ridge in more influence.
Member Since: Octubre 21, 2008 Posts: 215 Comments: 3159
927. HadesGodWyvern 9:39 PM GMT en Agosto 29, 2009    
94L may be a cyclone by Monday?
Member Since: Mayo 24, 2006 Posts: 43 Comments: 36688
929. BurnedAfterPosting 9:39 PM GMT en Agosto 29, 2009    
94L is not close to depression status

not organized enough, have to see what QS shows tonight, its structure has improved slowly over the last few days, but it is having problems keeping convection due to cooler SSTs. That problem should go away tonight and tomorrow.
930. HadesGodWyvern 9:40 PM GMT en Agosto 29, 2009    


Sept 1-2
Member Since: Mayo 24, 2006 Posts: 43 Comments: 36688
931. FloridaTigers 9:40 PM GMT en Agosto 29, 2009    
Quoting StadiumEffect:



Thanks. I'm at FIU


Nice, same here!
Member Since: Mayo 17, 2009 Posts: 0 Comments: 559
933. Relix 9:41 PM GMT en Agosto 29, 2009    
Quoting HadesGodWyvern:
94L may be a cyclone by Monday?


My forecast was depression tonight, so I'll move that to tomorrow. Tropical Storm status would be attained late Sunday, early Monday. Hurricane status? hmm... doubtful. SHIPS predicts it in 48 hours though.
Member Since: Agosto 3, 2006 Posts: 0 Comments: 2358
934. Relix 9:42 PM GMT en Agosto 29, 2009    
Quoting HadesGodWyvern:


Sept 1-2


The problem with that track is that there is no NW component yet, it's WNW with a far more touch of west than north.
Member Since: Agosto 3, 2006 Posts: 0 Comments: 2358
935. stormwatcherCI 9:43 PM GMT en Agosto 29, 2009    
Quoting StadiumEffect:


Thanks. I'm at FIU
One more question, what district are you from ?
Member Since: Octubre 9, 2008 Posts: 0 Comments: 8040
937. Magicchaos 9:44 PM GMT en Agosto 29, 2009    
Member Since: Abril 3, 2009 Posts: 107 Comments: 382
938. stormwatcherCI 9:45 PM GMT en Agosto 29, 2009    
Quoting FloridaTigers:


Nice, same here!
So you are both facing the possibility of being subjected to WS. LOL
Member Since: Octubre 9, 2008 Posts: 0 Comments: 8040
939. HadesGodWyvern 9:46 PM GMT en Agosto 29, 2009    
ya I know.. and the model is at least over 12hrs old data to being based on 0600 AM UTC. =)
Member Since: Mayo 24, 2006 Posts: 43 Comments: 36688
940. HurricaneSwirl 9:47 PM GMT en Agosto 29, 2009    
Quoting stormwatcherCI:
So you are both facing the possibility of being subjected to WS. LOL


it would be hilarious if they all got the same class
Member Since: Julio 7, 2008 Posts: 2 Comments: 3237
941. StadiumEffect 9:48 PM GMT en Agosto 29, 2009    
Quoting stormwatcherCI:
One more question, what district are you from ?


West Bay (yes I know, yet another one). lol
943. brakos82 9:49 PM GMT en Agosto 29, 2009    
Quoting Relix:


My forecast was depression tonight, so I'll move that to tomorrow. Tropical Storm status would be attained late Sunday, early Monday. Hurricane status? hmm... doubtful. SHIPS predicts it in 48 hours though.


SHIPS has been the most aggressive trying to develop storms. It's been trying to make everything a hurricane this season it seems.
944. StadiumEffect 9:51 PM GMT en Agosto 29, 2009    
Quoting FloridaTigers:


Nice, same here!


Good stuff! There are a few FIU students on here I've noticed.
945. Tazmanian 9:51 PM GMT en Agosto 29, 2009    
any one think that JIMENA will hit cat 5??
Member Since: Mayo 21, 2006 Posts: 5088 Comments: 111355
946. stormwatcherCI 9:52 PM GMT en Agosto 29, 2009    
Quoting HurricaneSwirl:


it would be hilarious if they all got the same class
I don't think it would be for them. They would probably go nuts having to deal with him face to face. Can't hit the ignore button then.
Member Since: Octubre 9, 2008 Posts: 0 Comments: 8040
949. stormwatcherCI 9:53 PM GMT en Agosto 29, 2009    
Quoting StadiumEffect:


West Bay (yes I know, yet another one). lol
Keep wondering if I will ever see another East Ender on here although Kman originates from here.
Member Since: Octubre 9, 2008 Posts: 0 Comments: 8040
950. extreme236 9:54 PM GMT en Agosto 29, 2009    
Quoting Tazmanian:
any one think that JIMENA will hit cat 5??


Maybe.
Member Since: Agosto 2, 2007 Posts: 19 Comments: 19234

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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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