Dr. Jeff Masters' WunderBlog

A Tale of Two Invests
Posted by: Dr. Jeff Masters, 12:17 PM GMT on July 04, 2010 +2
Good morning, everybody, Dr. Rob Carver filling in for Jeff on Independence Day.

Currently, NHC is monitoring two different areas for possible tropical cyclone development. Invest 95L is about 125 miles west-southwest of the mouth of the Mississippi and it doesn't have much thunderstorm activity associated with it. Dry air from the north and strong wind shear have weakened it considerably from yesterday, and NHC believes it has a 10% chance of becoming a tropical cyclone before the feature makes landfall.

Invest 96L is in the western Caribbean sea and bears watching closely. Earlier in the morning, the convection was all on the east side of the circulation center, but thunderstorms have developed on the southwest side. According to the CIMMS wind shear analysis, 96L is on the outskirts of a low wind shear region just east of the Yucatan peninsula. It's also over warm SST's (>29 deg C), so it could intensify. NHC gives it a 20% chance of becoming a tropical cyclone in the next 48 hours. Computer models have 96L going through the Yucatan Channel then turning left and making landfall somewhere near the Rio Grande.


Fig. 1 IR satellite composite from 720AM EDT.

Next Update
My next post will be sometime Monday afternoon/evening. If the situation changes significantly before then, I'll make a new post. In any event, enjoy the holidays...
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4351. midgulfmom 8:40 PM GMT on July 05, 2010    
Quoting Bordonaro:

That is 96L's problem. It still is an open wave, no closed center of circulation is apparent!

The lower pressures in that area, are due to high SST & high TCHP keeps the system popping off large masses of heavy convection, that waxes & wanes. Conditions are favorable for slow development, of course, we all have to wait.
Yes, I get "antsy" sometimes because this is the area (around Yucatan) that I like to start "getting ready" if need be...but hope that's not needed. Thanks!
Member Since: July 9, 2005 Posts: 2 Comments: 1002
4352. Patrap 8:40 PM GMT on July 05, 2010    






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4353. LADobeLady 8:40 PM GMT on July 05, 2010    
Quoting Patrap:


My fav spot in Se La..Cocodrie and Dulac.
by Far.

Heaven


More like BPville now down by Coco marina
Member Since: July 29, 2005 Posts: 21 Comments: 794
4354. Tazmanian 8:40 PM GMT on July 05, 2010    
Quoting MiamiHurricanes09:
It's likely that the bulk of organization and development will take place in the Gulf of Mexico.



yup
Member Since: May 21, 2006 Posts: 5089 Comments: 111615
4355. PtownBryan 8:41 PM GMT on July 05, 2010    
Quoting angiest:


If Ike had followed the forecast track a 20-30 foot surge would have gone up the Houston Ship Channel instead of just off to the north and east as happened. Not to mention putting the core of Houston in the eastern eyewall. And yet much of Houston was a tremendous mess for some weeks after getting hit by the "weak" side of the storm.

So we still haven't had our own worst case.


I went through Ike here in Pearland, and the southern half of the storm was worse than the northern half, windwise! And no we have not had our own worse case. And that is ok!
Member Since: July 5, 2010 Posts: 0 Comments: 170
4356. LADobeLady 8:42 PM GMT on July 05, 2010    
Quoting winter123:


They don't even look much different! Why is 95L not even a TD then?


Cindy wasn't upgraded until well after the fact, we all knew she was more than a TS because we were in it.

Only the shadow knows the reasoning behind the NHC.
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4357. TexasHurricane 8:42 PM GMT on July 05, 2010    
Quoting Patrap:




Looks like it could be a good size storm if it gets its act together....
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4358. Patrap 8:42 PM GMT on July 05, 2010    
Quoting LADobeLady:


More like BPville now down by Coco marina


Lil Houston I hear..it be
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4359. Tazmanian 8:42 PM GMT on July 05, 2010    
looks like 96L is heading for TX
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4360. OracleDeAtlantis 8:42 PM GMT on July 05, 2010    
Quoting Patrap:
5 years ago tonight



Now we're into the realm of Omen Climatology.
Member Since: August 27, 2009 Posts: 0 Comments: 323
4361. homelesswanderer 8:42 PM GMT on July 05, 2010    
Quoting MiamiHurricanes09:
It's likely that the bulk of organization and development will take place in the Gulf of Mexico.


Thats the worst part. If it bombs in the GOM whoever gets it will have to sit and ride it out. If the timeline of the models play out.
Member Since: August 15, 2008 Posts: 10 Comments: 3665
4362. tropicfreak 8:43 PM GMT on July 05, 2010    
Quoting MiamiHurricanes09:
It's likely that the bulk of organization and development will take place in the Gulf of Mexico.


Hope whatever is left of 96L (maybe bonnie) affects VA. We have been bone dry for 3-4 weeks with little or no rain to speak of. Not to mention we have suffered scorching heat, sometimes with temps in the triple digits, and more of that is expected for the rest of the week. We could use a good soaker. For God's sake send the rain that FL and TX don't need up to here in Richmond!!
Member Since: September 2, 2006 Posts: 110 Comments: 6612
4364. MiamiHurricanes09 8:43 PM GMT on July 05, 2010    
AVN satellite imagery shows waning of convection as the diurnal minimum approaches.
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4365. pcbsmokey 8:43 PM GMT on July 05, 2010    
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
324 PM EDT MON JUL 5 2010


.MARINE...COMPLEX MARINE FORECAST AGAIN TODAY. THE MODELS ARE ALL
SHOWING THE TROPICAL WAVE IN THE NORTHWEST CARIBBEAN SEA TRACKING
NORTHWEST INTO THE GULF OF MEXICO THROUGHOUT THE NEXT 48 HOURS. ALL
OF THE MODELS SHOW A TIGHTENING PRESSURE GRADIENT BETWEEN THE RIDGE
OVER THE SOUTHEASTERN COAST/WESTERN ATLANTIC AND THE WAVE. THE GFS
SEEMS TO BE TOO FAST/STRONG WITH THIS SYSTEM AND THE NAM A LITTLE
TOO FAR NORTH. GENERALLY OPTED FOR A WEAKER/SOUTHERN SOLUTION THAN
THE NAM AND THIS HAS GOOD SUPPORT FROM THE NEW 05/12Z EURO. AS A
RESULT...WILL SHOW WINDS INTO THE EXERCISE CAUTION LEVEL STARTING ON
TUESDAY AND BUILDING TO NEAR OR TO ADVISORY LEVELS ON TUESDAY NIGHT
INTO WEDNESDAY BEFORE CONDITIONS BEGIN TO SUBSIDE TO SUMMERTIME
NORMALS LATE IN THE WEEK. IT SHOULD BE NOTED THAT IF THE WAVE
MANAGES TO DEVELOP INTO A CLOSED TROPICAL SYSTEM...THE MARINE
FORECAST MAY NEED TO BE TRENDED UPWARD. HOWEVER...BASED ON THE
CURRENT APPEARANCE OF THE WAVE AND THE LACK OF SIGNIFICANT GENESIS
IN THE MODEL FIELDS...FEEL A WEAKER APPROACH IS BEST AT THIS TIME.
Member Since: June 27, 2010 Posts: 0 Comments: 38
4366. TexasHurricane 8:43 PM GMT on July 05, 2010    
Quoting Tazmanian:
looks like 96L is heading for TX


That what I keep seeing and hearing....
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4367. Patrap 8:43 PM GMT on July 05, 2010    
I have that inbound feeder heading toward me here uptown.

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4369. TexasHurricane 8:45 PM GMT on July 05, 2010    
Quoting homelesswanderer:


Thats the worst part. If it bombs in the GOM whoever gets it will have to sit and ride it out. If the timeline of the models play out.


yeah, this is about the time you would start preparing but we still don't know what it is going to do and go for sure yet.....ughhhh
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4370. Hardcoreweather2010 8:45 PM GMT on July 05, 2010    
Not trying to turn this into a prediction thread but many of you are asking for me to pick a location for landfall along with intensity so here goes . Please don't get upset if I pick your location. I am going with landfall Thursday at 1pm in Cameron,LA with 65 mph winds.
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4371. guygee 8:45 PM GMT on July 05, 2010    
I accept any eyeball challenge
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4372. atmoaggie 8:45 PM GMT on July 05, 2010    
Quoting extreme236:
Nonetheless, 95L does look better organized, but it's just out of real estate.
Best it's looked yet...
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4373. tropicfreak 8:45 PM GMT on July 05, 2010    
Quoting Baltimorebirds:
From Baltimore Sun.The heat wave in the east could be a record breaker.The only escape is from the heat is a cooling center or the beaches/pools.In ocean city maryland there are more life guards on duty than usual due to the amount of people in the water.One visiter from the beach said "I've never seen like this".This is only the beginning of the heat wave hear in baltimore said meteorologist Sue Palker.Expect tempetures to stay in the mid-upper 90's at least until sunday or tuesday of next week.Not only is the heat affecting baltimore,but other places as well,such as washington d.c,and philadelphia,and new york.Make sure if you have to go outside stay hydrated.Stay away from caffeine,and limit your activities.


Same here, ridiculously hot here. 100s are expected until the weekend with what? NO RAIN!!
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4374. MiamiHurricanes09 8:45 PM GMT on July 05, 2010    
Quoting StSimonsIslandGAGuy:
Was the pressure drop at 42056 last night real or instrument error?

Anyone know yet?
It was an actual pressure reading. Last night 96L decoupled, the mid level circulation was what we were watching while the low level circulation wondered off. Consequently, the low level circulation went over the buoy causing the dramatic pressure drop.

Member Since: September 2, 2009 Posts: 129 Comments: 20002
4375. CosmicEvents 8:45 PM GMT on July 05, 2010    
Quoting midgulfmom:
Yes, I get "antsy" sometimes because this is the area (around Yucatan) that I like to start "getting ready" if need be...but hope that's not needed. Thanks!
"Antsy".....LaDobeLady knows all about that...........
.
.
.
Nice to see you posting LaDobeLady. Be well.
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4376. PtownBryan 8:45 PM GMT on July 05, 2010    
Quoting winter123:

NVM got it. I thought the COC (weak now but thats obviously where its trying to form based on convection and outflow) was in the carribean though??



What amazes me is the models have such agreement on 96L(at least this model run) but were all over the place for Alex. If this projected track holds true it looks like us here in the Houston area are in for some more crazy weather!
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4377. Patrap 8:47 PM GMT on July 05, 2010    
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4378. winter123 8:47 PM GMT on July 05, 2010    
Quoting PtownBryan:


What amazes me is the models have such agreement on 96L(at least this model run) but were all over the place for Alex. If this projected track holds true it looks like us here in the Houston area are in for some more crazy weather!

Even if it stays a wave it will be a huge rainmaker, I think.

Well off to work, it was nice being here for 5 minutes in the past 3 days lol.
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4379. Chicklit 8:47 PM GMT on July 05, 2010    
Wow. Dr. Masters goes on vacation and the blog goes wild. Looks like the wave east of the windwards is getting ripped apart.

shortwaveloop

Interesting setup shearwise in the WestCarib.
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4380. Levi32 8:49 PM GMT on July 05, 2010    
96L's center was never under 1004mb. That reading was clearly a fluke.
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4381. MiamiHurricanes09 8:49 PM GMT on July 05, 2010    
Quoting Chicklit:
Wow. Dr. Masters goes on vacation and the blog goes wild. Looks like the wave east of the windwards is getting ripped apart.

shortwaveloop

Interesting setup, shearwise.
Yup. The TUTT is having a major role in pretty much "killing" the tropical wave. Here's the thing though, once the tropical wave reaches the Caribbean there will be very favorable conditions and I wouldn't be surprised to see this area really develop into something much stronger than 96L.
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4382. washingaway 8:50 PM GMT on July 05, 2010    
look at Alex's wake

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4383. MiamiHurricanes09 8:50 PM GMT on July 05, 2010    
Quoting Levi32:
96L's center was never under 1004mb. That reading was clearly a fluke.
Drakoen gave an explanation earlier concerning that.
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4384. StormGoddess 8:50 PM GMT on July 05, 2010    
Hey there everybody. Well, I would like to start blogging on here, but I can't seem to get my blog to start working where I can put an entry in there, no matter what I try! Oh, well!
Member Since: June 10, 2010 Posts: 6 Comments: 574
4386. weathermanwannabe 8:50 PM GMT on July 05, 2010    
Interesting to note that if Bonnie actually forms from this, and traverses over the same general area, that it is a unique "early season" validation for Dr. Klotzenbach's paper last year on storm "clusters". However, he was focusing on activity during the peak of seasons as to clusters and this early seaosn "back to back" does not bode well for the real cluster action coming during the peak of the season and perhaps also a valiation of the very ripe conditions comning into June. My point is that we could see a few more storms in July if sheer remains low from Africa to the Lesser Antilles.
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4387. duajones78413 8:50 PM GMT on July 05, 2010    
Quoting TexasHurricane:


That what I keep seeing and hearing....


Where is this info coming from?
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4388. homelesswanderer 8:51 PM GMT on July 05, 2010    
Quoting TexasHurricane:


yeah, this is about the time you would start preparing but we still don't know what it is going to do and go for sure yet.....ughhhh


Yep just love it. It was bad when we knew what was coming. This year Mother Nature throwing n a new twist to make us crazy.
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4389. midgulfmom 8:52 PM GMT on July 05, 2010    
Quoting LADobeLady:


In Houma, LA
Sorry I took so long to respond. My computer went down. You are just southwest of me. Yep, you got and are getting the rain. I'm in Westwego just south of N.O.(where I'm orginally from). Houma is great. Years ago my dad used to coach at Terrebonne High. Some of my neighbors here in Westwego, most of whom are gone now, were from that area and still spoke french. They were always asking/looking for other french speakers. I'm sorry I couldn't. My grandparents were the last in my family to do so.
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4390. Levi32 8:52 PM GMT on July 05, 2010    
Quoting MiamiHurricanes09:
Drakoen gave an explanation earlier concerning that.


The low-level circulation went near the buoy but never had a pressure of 1004mb. The instrument failed in some way during that particular pressure drop.
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4391. LADobeLady 8:52 PM GMT on July 05, 2010    
Quoting CosmicEvents:
"Antsy".....LaDobeLady knows all about that...........
.
.
.
Nice to see you posting LaDobeLady. Be well.


Nice to see you as well Cosmic, you know me when the season starts I come back to WU. I hate to even type this, but I went to fill up my sugar container this morning, and there were ants in the sugar...
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4392. MiamiHurricanes09 8:53 PM GMT on July 05, 2010    
Quoting Levi32:


The low-level circulation went near the buoy but never had a pressure of 1004mb. The instrument failed in some way during that particular pressure drop.
Probably did.
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4393. guygee 8:53 PM GMT on July 05, 2010    
Quoting MiamiHurricanes09:
It was an actual pressure reading. Last night 96L decoupled, the mid level circulation was what we were watching while the low level circulation wondered off. Consequently, the low level circulation went over the buoy causing the dramatic pressure drop.
Pressure drop was coincident with a windshift from E/ESE to S.
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4395. oakland 8:54 PM GMT on July 05, 2010    
Quoting LADobeLady:


Nice to see you as well Cosmic, you know me when the season starts I come back to WU. I hate to even type this, but I went to fill up my sugar container this morning, and there were ants in the sugar...


NOOOOOOOOO...... LOL
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4396. angiest 8:55 PM GMT on July 05, 2010    
Quoting Tazmanian:
looks like 96L is heading for TX


But which part? Brownsville to Sabine Pass doesn't make preparing easy.
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4397. Levi32 8:55 PM GMT on July 05, 2010    
Quoting StSimonsIslandGAGuy:
Regardless of whether it develops the east Caribbean wave sure has a big moisture surge with it. I wonder where the moisture will go.

I also wonder how common little low pressures like the one that went over 42056 are in strong waves that aren't detected when they don't move over buoys.


If there really had been a 1004mb low center in there, I guarantee you we would have known about it lol. It would have been painfully obvious on visible satellite imagery.
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4398. TexasHurricane 8:55 PM GMT on July 05, 2010    
Quoting duajones78413:


Where is this info coming from?


just different models that are being posted on here and from what some people are suggesting...
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4399. PtownBryan 8:55 PM GMT on July 05, 2010    
Quoting tropicfreak:


Hope whatever is left of 96L (maybe bonnie) affects VA. We have been bone dry for 3-4 weeks with little or no rain to speak of. Not to mention we have suffered scorching heat, sometimes with temps in the triple digits, and more of that is expected for the rest of the week. We could use a good soaker. For God's sake send the rain that FL and TX don't need up to here in Richmond!!


Believe it or not Houston was in a drought...Was. lol. Pray yall get some rain soon!
Member Since: July 5, 2010 Posts: 0 Comments: 170
4400. MiamiHurricanes09 8:56 PM GMT on July 05, 2010    
Quoting guygee:
Pressure drop was coincident with a windshift from E/ESE to S.
Would that really cause a pressure drop of nearly 6 millibars over a 2 hour period?
Member Since: September 2, 2009 Posts: 129 Comments: 20002

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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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