Dr. Jeff Masters' WunderBlog

Tropical Storm Emily forms from Invest 91L
Posted by: Dr. Jeff Masters, 00:09 GMT le 02 août 2011 +13
Tropical Storm Emily formed this afternoon after investigation by the Hurricane Hunters. While dodging the Lesser Antilles islands, the Hunters managed to find a closed surface circulation. Emily is currently located near 15.2°N, 62.0°W, and has maximum sustained winds of 40 mph. Thunderstorm activity has grown in size and intensity over the past 6 hours, and mid-level circulation is still elongated, but strong. The environment around Emily hasn't changed much from this morning. The moisture within the storm is still relatively high, although there continues to be a lingering dry, Saharan air mass to its north, which could become a factor in intensification. Wind shear is still high (30-40 knots) on the north side, as well.


Figure 1. Visible satellite of Tropical Storm Emily at 7:30pm EDT as it moves west into the Caribbean.

Forecast For Emily
The official track forecast is that Emily will continue to travel west-northwest through the Caribbean and cross Hispaniola Wednesday morning, after which it turns slightly more to the north for a potential landfall along the Florida east coast as a hurricane. Models continue to be split between Emily entering the Gulf of Mexico or recurving before making landfall along the East Coast. In the camp of an eastern Gulf of Mexico track are the CMC, NOGAPS, and the UKMET models. The ECMWF has been trending that way, as well. The GFS continues to favor a northwest track towards Florida before taking a turn to the northeast. The HWRF has been forecasting an eastern coast of Florida solution, and continues to do so in the 12Z run. The GFDL remains conservative and forecasts that the system will turn north and northeast well before making any connection with the U.S. coast. It is notable that although there is still much disagreement on where this system will go, but the models have been trending west in their tracks over the past few days. As the official track forecast from the National Hurricane Center illustrates, this is a U.S. landfall threat.


Figure 2. Official five-day track forecast for Tropical Storm Emily.

The National Hurricane Center forecasts that Emily will probably strengthen into a hurricane. In the 12Z runs, the GFDL brings Emily up to category 2 strength, and HWRF forecasts it to max out at category 1. DSHIPS (the SHIPS model that takes into account land interaction) forecasts maximum intensity of a moderate tropical storm. General consensus continues to be that Emily will reach a peak intensity somewhere between a moderate tropical storm and a moderate category 1 hurricane. Now that Emily has developed, and when the models ingest some data from the Hurricane Hunter missions, we will have more certainty in an intensity forecast.

Dr. Rob Carver might have an update later this evening, and I'll definitely be back tomorrow, early afternoon, with a new post on Emily.

Angela
Categories: Hurricane
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1351. scott39 05:15 GMT le 02 août 2011    
Quoting Stormchaser2007:
French analysis

(Insert French Joke Here)

Thats easier to see that Emily is E side heavy in convection and a little to none on the W side. IMO
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1352. sailingallover 05:16 GMT le 02 août 2011    
Quoting sunlinepr:

thanks for the loops. I can't get them on my iphone.
Maybe we should have a Storm party n Salinas tomorrow
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1353. SouthDadeFish 05:16 GMT le 02 août 2011    
Where the heck is recon?
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1354. KoritheMan 05:16 GMT le 02 août 2011    
Quoting VAbeachhurricanes:


why would we want that?!


I think he means for recurvature prospects.
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1355. texwarhawk 05:16 GMT le 02 août 2011    
Is anyone else having trouble with Recon data in Google Earth--- I don't really wanna go back to reading them on NHC's website, don't even know if I'll remember how to decode.
Member Since: 7 juillet 2010 Posts: 4 Comments: 202
1356. KoritheMan 05:16 GMT le 02 août 2011    
Quoting traumaboyy:


Is there no radar in the islands we can see or have I just missed them??


Here's one out of Martinique.
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1358. VAbeachhurricanes 05:17 GMT le 02 août 2011    
AS THE RIDGE BUILDS EAST SAT...EXPECT TEMPERATURES TO WARM A FEW
DEGREES WITH HIGHS INTO THE MID...PERHAPS UPPER 90S...ALONG WITH
INCREASING CHANCES FOR SHOWERS AND TSTMS BY SAT AFTN/EVENING AHEAD
OF THE NEXT COLD FRONT. FRONT WILL SLOWLY SAG SE THROUGH THE CWA
SUN-MON...BUT THE STRENGTH OF THE FRONT AND ITS INTERACTION WITH
POSSIBLE TROPICAL SYSTEM OFF FLORIDA MAKE FOR RATHER UNCERTAIN
FORECAST. HAVE CARRIED A BROAD-BRUSHED 30% CHANCE FOR SHOWERS/TSTMS
ON SUNDAY...AND 20% CHANCES NORTH/30% SOUTH ON MON.

---
starting to get mentioned in my discussion sigh... if it follows the western side of the cone guess im getting walloped.
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1359. Stormchaser2007 05:18 GMT le 02 août 2011    
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1360. sunlinepr 05:19 GMT le 02 août 2011    
Emily 1987

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1361. scott39 05:19 GMT le 02 août 2011    
Who else thinks that Emily has all the convection to the E and almost none to the W?
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1362. VAbeachhurricanes 05:19 GMT le 02 août 2011    
whens recon supposed to go wheels up?
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1363. Hurricanejer95 05:19 GMT le 02 août 2011    
Quoting sailingallover:

thanks for the loops. I can't get them on my iphone.
Maybe we should have a Storm party n Salinas tomorrow


Salinas, California? Thats the only Salinas I know (I'm a Californian)
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1364. texwarhawk 05:19 GMT le 02 août 2011    
Quoting KoritheMan:


Here's one out of Martinique.


Don't you wish every little spit of land had level 3 radar? America seems to be the most interested in atmospheric research imo. Well maybe not most interested but most easily accessible.
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1365. traumaboyy 05:20 GMT le 02 août 2011    
Quoting KoritheMan:


Here's one out of Martinique.


Thanks!!
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1366. SouthDadeFish 05:20 GMT le 02 août 2011    
Quoting VAbeachhurricanes:
whens recon supposed to go wheels up?
fifty minutes ago....
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1367. 3211976 05:20 GMT le 02 août 2011    
We just had a very strong feeder band going through San Juan, PR
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1368. FloridaTigers 05:21 GMT le 02 août 2011    
Kori! You online?
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1369. Stormchaser2007 05:21 GMT le 02 août 2011    
I'd guess the center is just west of the islands.

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1370. texwarhawk 05:22 GMT le 02 août 2011    
Quoting Stormchaser2007:


If you don't mind me asking- what is the annual fee for GREarth. I've been looking into it to go along with the 60 I shelled out for GRLevel3 (well worth the cost)

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1371. KoritheMan 05:22 GMT le 02 août 2011    
Quoting FloridaTigers:
Kori! You online?


Actually, I was about to step out to do my nightly workouts. :/
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1372. KoritheMan 05:22 GMT le 02 août 2011    
Quoting texwarhawk:


Don't you wish every little spit of land had level 3 radar? America seems to be the most interested in atmospheric research imo. Well maybe not most interested but most easily accessible.


Yeah. lol
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1373. 7544 05:22 GMT le 02 août 2011    
who thinks emily will be stronger on the next 2 am update
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1374. TomTaylor 05:22 GMT le 02 août 2011    
Quoting Levi32:
Notice the long barrier of 200mb vorticity just north of Emily and the Caribbean. This is what is keeping her outflow from expanding northwestward and somewhat shearing her, keeping the thunderstorm activity east of the center. Now notice the area of strong vorticity off of the Carolinas. That is the trough coming into the western Atlantic to try to pick up Emily. As this trough digs in, the trough north of the Caribbean will get kicked out. With a new, more divergent upper flow situated northwest of Emily associated with the new trough, she will find herself under a more favorable upper-level environment for strengthening in a couple days.

That's a good point. The negative effect of this TUTT should become more significant the more the system moves to the WNW as it will get closer to the TUTT axis.




Although, I would argue that this TUTT is helping the system more than hurting it at the moment. Most of the upper level convergence and sinking, drying, air associated with the TUTT is pretty far from the system. Also, it is clearly allowing convection to take off on the east side of the system as it is pulling air strongly out of the top of the system.
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1375. ProgressivePulse 05:22 GMT le 02 août 2011    
Holding for the 4:45. My input is that the COC is right on track. Devoid of much convection however, life is growing.

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1376. MississippiWx 05:23 GMT le 02 août 2011    
Quoting Stormchaser2007:
I'd guess the center is just west of the islands.



That would confirm what some of us have been thinking...
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1377. KoritheMan 05:23 GMT le 02 août 2011    
Since I'm about to leave, I'll post my blog one more time.

Kyle, I might not make it on AIM tonight, but I probably will tomorrow.
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1378. weatherman566 05:23 GMT le 02 août 2011    
Quoting VAbeachhurricanes:


why would we want that?!


You want a stronger system to move into Hispaniola because the mountains will really disrupt the system. It will get really disorganized, and it will have a tough time organizing again once it emerges back into the Atlantic.

If it stays rather weak, the mountains won't destroy the system completely (inner core won't be impacted as much). If this happens, it could emerge back into the Atlantic and strengthen into a decent cyclone afterwards and possibly impact the United States.

A lot of what if scenarios.
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1379. tennisgirl08 05:23 GMT le 02 août 2011    
I'm not too impressed, yet. Big storm, yes. But more organized...no. The next TWO will show same wind speed.
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1380. j2008 05:23 GMT le 02 août 2011    
Quoting Stormchaser2007:
I'd guess the center is just west of the islands.


Yup it is, I'm 100% sure. I'm gonna say it will be 45MPH at the next update.
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1382. FloridaTigers 05:23 GMT le 02 août 2011    
Are we going to get intermediate advisories due to the close proximity of the islands?
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1383. msphar 05:23 GMT le 02 août 2011    
Running to Jobos seems a bit extreme at this point. I wonder why Sailingallover did that ? Being further West on Puerto Rico brings you closer to the track.

Thoughts ?
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1384. Stormchaser2007 05:23 GMT le 02 août 2011    
Quoting texwarhawk:


If you don't mind me asking- what is the annual fee for GREarth. I've been looking into it to go along with the 60 I shelled out for GRLevel3 (well worth the cost)



$180/yr

Unfortunately the process of purchasing it has stopped.

Won't be available for some time.
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1385. sailingallover 05:23 GMT le 02 août 2011    
Quoting txjac:


Dont you get scared being on the water when storms are in the area? That has to be some kind of life. Never have really been on a boat so its hard for me to imagine

we tuck into small protected bays and mangrove creeks for storms..
We call them hurricane holes. The one here in Bahia de hobos in PR are some of the best. I have 20' tall mangroves on three sides the front is only open a few hundred feet to more mangroves, the boat is aground in soft mud. Not very dangerous unless the storm surge goes over 12'
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1386. texwarhawk 05:24 GMT le 02 août 2011    
Quoting 7544:
who thinks emily will be stronger on the next 2 am update


If the LLC is just to the west of the islands under that blob of convection, I would say pressures will have dropped- now whether that translates to a increase in wind speed I will not speculate because I truly don't know.
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1387. SouthDadeFish 05:24 GMT le 02 août 2011    
Quoting FloridaTigers:
Are we going to get intermediate advisories due to the close proximity of the islands?
Yes.
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1388. Stormchaser2007 05:24 GMT le 02 août 2011    
Quoting FloridaTigers:
Are we going to get intermediate advisories due to the close proximity of the islands?


Intermediate advisory at 2am.
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1389. sunlinepr 05:25 GMT le 02 août 2011    


For sure, With that rain falling, we will have a good sleep...
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1390. scott39 05:25 GMT le 02 août 2011    
Quoting ProgressivePulse:
Holding for the 4:45. My input is that the COC is right on track. Devoid of much convection however, life is growing.

Starting to burst a little around the center.
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1391. Hattie 05:25 GMT le 02 août 2011    
Quoting sailingallover:

thanks for the loops. I can't get them on my iphone.
Maybe we should have a Storm party n Salinas tomorrow
Hi,I am in Canada, and my boat is in Salinas, just hoping the anchors hold,,Good luck.
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1392. ProgressivePulse 05:25 GMT le 02 août 2011    
Looks to have ingested a large amount of dry air....
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1393. texwarhawk 05:26 GMT le 02 août 2011    
Quoting Stormchaser2007:


$180/yr

Unfortunately the process of purchasing it has stopped.

Won't be available for some time.


Well not that it matters to me at that price. Would be nice to have but can't justify it.

On GR's website it seems you can still email (whoever it is your supposed to email) and request it- is he no longer taking requests?
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1394. scott39 05:28 GMT le 02 août 2011    
Quoting ProgressivePulse:
Looks to have ingested a large amount of dry air....
Its going to take awhile to recover from that.
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1395. Stormchaser2007 05:29 GMT le 02 août 2011    
Quoting texwarhawk:


Well not that it matters to me at that price. Would be nice to have but can't justify it.

On GR's website it seems you can still email (whoever it is your supposed to email) and request it- is he no longer taking requests?


Yeah

The site that processes the orders has been giving him a deal of trouble. There have also been some data feed issues.
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1396. SouthDadeFish 05:29 GMT le 02 août 2011    
Convection continues to pulse westward with hints of banding. If the center is where radar suggests, it's under this convection.

Link
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1397. Bluestorm5 05:30 GMT le 02 août 2011    
Just founded this site 2 days ago and wanted to chat about tropics with you guys. I'm in high school, looking for career in meterology and been tracking the storms since I was very young using Weather Channel, but didn't really get deep until this year. I've learned alot more about tornadoes this year with help of few friends at National Weather Service Raleigh. 2011 tornado season had been easily the worst I've seen in 7 years of tracking them. Hopefully I can learn some more as well with hurricanes with you guys helping me out :) Also, one more... I'm deaf, so expect my grammar to be poor.
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1398. txjac 05:30 GMT le 02 août 2011    
Quoting sailingallover:

we tuck into small protected bays and mangrove creeks for storms..
We call them hurricane holes. The one here in Bahia de hobos in PR are some of the best. I have 20' tall mangroves on three sides the front is only open a few hundred feet to more mangroves, the boat is aground in soft mud. Not very dangerous unless the storm surge goes over 12'


Awesome, gotta be an interesting life. Stay safe now
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1399. sailingallover 05:31 GMT le 02 août 2011    
Quoting msphar:
Running to Jobos seems a bit extreme at this point. I wonder why Sailingallover did that ? Being further West on Puerto Rico brings you closer to the track.

Thoughts ?

would you gamble 160k when you could not win but only lose??
I came to hobos because until yesterday it was supposed to go over Culebra or STT as a Cat 1 or better. The track shifted south yesterday after I was already almost her.
Also I knew if Emily did end up down here it would be because it was weaker as is the case due to the retarded development.
Riding out 60knts no big deal bu the 96 forcasted until yesterdays sucks
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1400. 7544 05:31 GMT le 02 août 2011    
here comes your west side convection
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1401. ProgressivePulse 05:31 GMT le 02 août 2011    
No HH data, I'm off all. No use in tracking the surface in the blind of the night, we'll see what tomorrow brings.
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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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