Dr. Jeff Masters' WunderBlog

TD 7 dies; 93L little threat to develop
Posted by: Dr. Jeff Masters, 3:55 PM GMT on August 11, 2012 +32
Tropical Depression Seven is dead, ripped apart by moderate wind shear of 10 - 20 knots this Saturday morning. The storm was too small and fragile to survive the shear, thanks to dry air from the Sahara that had infiltrated the storm environment. None of the reliable models forecasts that TD 7 will regenerate as it tracks westwards across the Caribbean over the next four days. The remains of the storm should arrive in Mexico's Yucatan Peninsula on Wednesday.


Figure 1. Morning satellite image of the remnants of TD 7.

93L
A large tropical wave(Invest 93L) is located in the Eastern Atlantic about 300 miles northwest of the Cape Verde Islands. Satellite loops show a pronounced spin to the atmosphere at mid levels, but little in the way of heavy thunderstorm activity. The latest Saharan Air Layer Analysis from the University of Wisconsin shows that there is a large area of dry air from the Sahara surrounding 93L, which has infiltrated into the storm. This dry air will be a significant impediment to development during the coming week, as the 8 am EDT run of the SHIPS model predicts dryness at mid-levels of the atmosphere will increase during the next five days. None of the reliable computer models develop 93L during the coming seven days, and the storm is expected to move west-northwest and then north, recurving well to the east of Bermuda. In their 8 am Tropical Weather Outlook, NHC gave 93L a 20% chance of becoming a tropical depression by Monday morning.

I'll have a new post on Sunday.

Jeff Masters
Categories: Hurricane
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701. HuracanTaino 1:21 AM GMT on August 12, 2012    
Quoting MAweatherboy1:

He'll always be Ernesto to us:

It's the same system, so is Ernesto with a different name. I mean the same entity regardless of its name.
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702. Tribucanes 1:21 AM GMT on August 12, 2012    
Ernesto never lost his mid-level circulation and his LLCOC came back almost immediately when Ernesto got to the Pacific. I'm still not sure the LLCOC ever fully died. Watched the satellite presentation of Ernesto closely, it seemed to me that the COC relocated NW over open waters while making the crossover. Irregardless, still cool to see it reform again. I'm still holding out hope that the NHC, during season wrap up, will change their thinking.
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703. PedleyCA 1:21 AM GMT on August 12, 2012    


Enestor
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704. washingtonian115 1:22 AM GMT on August 12, 2012    
Quoting bappit:

The blog needs a soundtrack. People could vote for what they think fits the blog. The track with the most votes gets played.

One track would be the theme from jaws.
Certainly would fit when the blog is under attack.Lol.
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705. stormpetrol 1:23 AM GMT on August 12, 2012    
Ex TD7 will regenerate , if not, I'll eat crow " I like BBQ sauce"! I've seen this happen repeatedly with storms in that area, it's nothing new!
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706. GTcooliebai 1:24 AM GMT on August 12, 2012    
Oh yeah wikipedia is on our side. Ernesto is still active. Ernesto-Hector. "The remnant broad area of low pressure emerged offshore the southwest coast of Mexico into the Eastern Pacific ocean during the afternoon of August 10, developing into Tropical Depression 8-E by the afternoon of August 11"
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707. NativeSun 1:24 AM GMT on August 12, 2012    
Hey JL if you look at the current water temp charts off S.A. you will see that the water has cooled in Nino region 1.2 and warmed in the Central Pacific. Modoki anyone?
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708. hydrus 1:24 AM GMT on August 12, 2012    
Quoting DontNeedNoHandle:
One thing is certain: the NHC is never as wrong as 90% of the weather "prognosticators" on this blog. I'm always amused to read the opinion of a waiter with 9 hours of meterology credits at a local community college tell Dr Masters they "respectfully disagree" with his assesment of the tropics when the doc says a system is likely to not hit the CONUS.
This is a great post...Whether you need a handle or not....Excellent.
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709. JLPR2 1:25 AM GMT on August 12, 2012    
Quoting NativeSun:
Hey JL if you look at the current water temp charts off S.A. you will see that the water has cooled in Nino region 1.2 and warmed in the Central Pacific. Modoki anyone?


El Niño is determined by anomalies not current water temps.
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710. hydrus 1:25 AM GMT on August 12, 2012    
Quoting stormpetrol:
Ex TD7 will regenerate , if not, I'll eat crow " I like BBQ sauce"! I've seen this happen repeatedly with storms in that area, it's nothing new!
I agree. The Warm West Caribbean awaits our tough ex t.d..
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712. wunderkidcayman 1:26 AM GMT on August 12, 2012    
Quoting stormpetrol:
Ex TD7 will regenerate , if not, I'll eat crow " I like BBQ sauce"! I've seen this happen repeatedly with storms in that area, it's nothing new!

I totaly agree with EX TD 7 going to regenerate I think its starting point for it to get going is 65W-66W its uphill from there
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713. GTcooliebai 1:27 AM GMT on August 12, 2012    
Thunderstorms still going on Mid-ULL to the south and trough to the north bringing in an onshore southwest wind:

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714. NativeSun 1:29 AM GMT on August 12, 2012    
This is an anomalie the water started cooling a long time ago in the Eastern Pacicfic and warming in the Central Pacific.
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715. floridaT 1:31 AM GMT on August 12, 2012    
Quoting hydrus:
This is a great post...Whether you need a handle or not....Excellent.
PLEASSSSSSSSSSSSSSE
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716. Tribucanes 1:31 AM GMT on August 12, 2012    
Debbie still the storm of the year. Ernesto for silver at this point easily. Neither will make the top five by the time the season is over imo. Beryl was claimed to be close to hurricane strength, but last I checked, there were no verified winds over 50. NHC doing A+ work again this year. Between Debbie and Ernesto it's certainly been no walk in the park for em.
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717. SFLWeatherman 1:31 AM GMT on August 12, 2012    
18Z 180HR


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718. JLPR2 1:33 AM GMT on August 12, 2012    
Quoting NativeSun:
This is an anomalie the water started cooling a long time ago in the Eastern Pacicfic and warming in the Central Pacific.


Oh, you mean that little cold anomaly at the coast?
Takes more than that to make a Modiki. Still it makes you wonder why is it there.

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719. hydrus 1:34 AM GMT on August 12, 2012    
Quoting floridaT:
PLEASSSSSSSSSSSSSSE
Come on T...That post wuz the...well..you know..
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720. SFLWeatherman 1:35 AM GMT on August 12, 2012    
WOW 540 line going in to the US

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721. hydrus 1:36 AM GMT on August 12, 2012    
Quoting JLPR2:


El Niño is determined by anomalies not current water temps.
what..?
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722. Hurricanes101 1:36 AM GMT on August 12, 2012    
Quoting hydrus:
This is a great post...Whether you need a handle or not....Excellent.


Wow you think that was a great post? He basically told everyone on this blog that we are not allowed to have discussions on the tropics unless we agree with the NHC

screw that
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723. hydrus 1:36 AM GMT on August 12, 2012    
Quoting SFLWeatherman:
WOW 540 line going in to the US

were all gonna die
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724. Dragod66 1:37 AM GMT on August 12, 2012    
Quoting Tribucanes:
Debbie still the storm of the year. Ernesto for silver at this point easily. Neither will make the top five by the time the season is over imo. Beryl was claimed to be close to hurricane strength, but last I checked, there were no verified winds over 50. NHC doing A work again this year. Between Debbie and Ernesto it's certainly been no walk in the park for em.


Ernesto was way better than debby downer!...:)
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725. HurricaneHunterJoe 1:37 AM GMT on August 12, 2012    
Quoting PedleyCA:
Hey Joe,
Hows the Temps down there. Are you getting any of these 100's we are getting up here in the IE Six days over 100 for me. A few fires as well.


Was 102 when before the storms hit....now 78..........whoooooooooo doggiesssssssss
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726. SFLWeatherman 1:38 AM GMT on August 12, 2012    
WOW i got 4.57 today wow
US National Weather Service Miami Florida
After a wet day for the east coast metro areas, sunlight tries to peek out over the top of another heavy rainmaker in central Miami-Dade County.

Miami International Airport received 3.35" today (as of 9pm) -- toppling the old record for the date of 2.35" set in 1984. Palm Beach International had an even wetter day today... but not quite enough to clench a record. As of 9pm, 4.57" was recorded at PBI... the record for the date is 5.15" from 1931.
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727. washingtonian115 1:39 AM GMT on August 12, 2012    
For anyone confused about 717 those are the ensembles.
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728. NativeSun 1:40 AM GMT on August 12, 2012    
JL please look at the CSFv2 in the Nino 1.2 region and look at what the model is showing, also check pout what the model is showing for the Central Pacific.
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729. SFLWeatherman 1:40 AM GMT on August 12, 2012    
30'S in August for the US
Quoting hydrus:
were all gonna die
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730. beell 1:41 AM GMT on August 12, 2012    
REMNANTS OF ERNESTO DISCUSSION NUMBER 37
NWS NATIONAL HURRICANE CENTER MIAMI FL AL052012
1000 AM CDT FRI AUG 10 2012

SURFACE OBSERVATIONS FROM MEXICO INDICATE THAT THE LOW-LEVEL CENTER OF CIRCULATION HAS BECOME DISRUPTED BY THE HIGH TERRAIN AND IS NO LONGER TRACKABLE. ERNESTO NOW CONSISTS OF A BROAD AREA OF LOW PRESSURE OVER SOUTHERN MEXICO. HEAVY RAINFALL ASSOCIATED WITH THE REMNANTS OF ERNESTO WILL CONTINUE DURING THE NEXT DAY OR TWO. THESE RAINS WILL LIKELY PRODUCE FLASH FLOODING OVER MUCH OF
SOUTHERN MEXICO.

THE REMNANTS OF ERNESTO ARE EXPECTED TO MOVE OFF MEXICO INTO THE EASTERN PACIFIC WITH THE POTENTIAL TO BECOME A TROPICAL CYCLONE. IF THIS IS THE CASE...IT WILL ACQUIRE A NEW DEPRESSION NUMBER...OR A NEW NAME IF IT BECOMES A TROPICAL STORM.

THIS IS THE LAST ADVISORY ISSUED BY THE NATIONAL HURRICANE CENTER ON
ERNESTO.
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731. JLPR2 1:41 AM GMT on August 12, 2012    
Quoting hydrus:
what..?


That was pretty clear, but...

Waters are cooling in the area because it is winter in the southern hemisphere, for example:



But what is used to determine the strength of an El Niño are temperatures anomalies in said waters, not the current water temps.
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732. 47n91w 1:41 AM GMT on August 12, 2012    
Quoting SFLWeatherman:
WOW 540 line going in to the US



It was pretty chilly this morning across Wisconsin this morning. A few 38 degrees were reported from PWS. Otherwise, it was a cool fall morning here. Hope fall doesn't come too early.

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733. JLPR2 1:42 AM GMT on August 12, 2012    
Quoting NativeSun:
JL please look at the CSFv2 in the Nino 1.2 region and look at what the model is showing, also check pout what the model is showing for the Central Pacific.


Now we are talking about two different things, I'm talking about current anomalies, you are talking about forecasts.
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734. Tribucanes 1:43 AM GMT on August 12, 2012    
So no one question anything anymore. Let's all no longer use our own thinking. If you do use your own thinking, please, please do not expound on it. No questioning Masters, the NHC, or any of the experts; even if they disagree or contradict themselves. COME ON MAN! This is a weather BLOG, this is a learning blog, this is a place where people should feel free to make their own assessments. Yes it can be funny to see rookies second guess the pros all the time and be wrong all the time. Yes those who do it all the time can be a distraction and annoyance. I'm not sure anyone regularly here fits that bill though. DONTNEEDNOHANDLE dropped a couple of lines, knowing it would divide the thinking of the blog. Then he left; classy? I think not.
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736. HurricaneHunterJoe 1:44 AM GMT on August 12, 2012    
And yes it's been very warm 94-102, today was the hottest.
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737. NativeSun 1:45 AM GMT on August 12, 2012    
The reason the water is cooling is due to the cold PDO.
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738. winter123 1:47 AM GMT on August 12, 2012    
Quoting Tribucanes:
Ernesto never lost his mid-level circulation and his LLCOC came back almost immediately when Ernesto got to the Pacific. I'm still not sure the LLCOC ever fully died. Watched the satellite presentation of Ernesto closely, it seemed to me that the COC relocated NW over open waters while making the crossover. Irregardless, still cool to see it reform again. I'm still holding out hope that the NHC, during season wrap up, will change their thinking.

Even if they change their mind in post-season, they can't just rename the "H" storm "Ernesto", then revert all the EPAC names from "I" onward to the previous name.
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739. SFLWeatherman 1:48 AM GMT on August 12, 2012    
BOHEMIA, N.Y. — The National Weather Service says a small tornado has touched down on the south shore of Long Island during a storm that uprooted trees and damaged homes.

The tornado was moving at maximum wind speeds of about 85 miles per hour in Suffolk County Friday afternoon. The National Weather Service says it touched down near Great River and traveled about 4.5 miles north across Ronkonkoma and into Bohemia, a hamlet in the town of Islip.

The tornado was about 150 yards wide.

The worst damage occurred in Bohemia at about 2 p.m. Several trees were uprooted and fell onto cars, power lines and houses.

Eyewitnesses reported the tornado moving north along the Connequot River. There are no reports of injuries.

Newsday reported that Nassau County police responded to a report of a tree falling into a house in the town of Hempstead.
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740. NativeSun 1:48 AM GMT on August 12, 2012    
The current anomalie is showing a trend favoring the CSFv2 model.
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741. JLPR2 1:49 AM GMT on August 12, 2012    
Quoting NativeSun:
The current anomalie is showing a trend favoring the CSFv2 model.


You got a link to the models? Kinda want to check it out. :)
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742. JLPR2 1:51 AM GMT on August 12, 2012    
Here is a nice illustration of what I'm saying.

It is normal for the temps to go down in the area around this time, what is to be considered is just how much are they above normal.



Seems Nino area 4 is the most neutral of them all.
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743. bluheelrtx 1:52 AM GMT on August 12, 2012    
Quoting 722. Hurricanes101:

He basically told everyone on this blog that we are not allowed to have discussions on the tropics unless we agree with the NHC
No. He didn't.
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744. NativeSun 1:53 AM GMT on August 12, 2012    
Check out the Weather Bell site they have a good model page.
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745. WxGeekVA 1:55 AM GMT on August 12, 2012    
Quoting Tribucanes:
So no one question anything anymore. Let's all no longer use our own thinking. If you do use your own thinking, please, please do not expound on it. No questioning Masters, the NHC, or any of the experts; even if they disagree or contradict themselves. COME ON MAN! This is a weather BLOG, this is a learning blog, this is a place where people should feel free to make their own assessments. Yes it can be funny to see rookies second guess the pros all the time and be wrong all the time. Yes those who do it all the time can be a distraction and annoyance. I'm not sure anyone regularly here fits that bill though. DONTNEEDNOHANDLE dropped a couple of lines, knowing it would divide the thinking of the blog. Then he left; classy? I think not.


Yeah... No. If I wanna forecast, I'm gonna forecast. And if I'm wrong, I'm wrong. Oh well. But I dang sure won't stop because someone says that I'm not as good as the pros. Because I wonder how the pros got their start? Oh, yeah, probably by drawing weather forecasts and showing them to friends and family. And that's what I'm gonna do, one day, is be one of the pros. And I'll be sure to come by here one day and let you all know when that happens.
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746. TropicalAnalystwx13 1:57 AM GMT on August 12, 2012    
Quoting WxGeekVA:


Yeah... No. If I wanna forecast, I'm gonna forecast. And if I'm wrong, I'm wrong. Oh well. But I dang sure won't stop because someone says that I'm not as good as the pros. Because I wonder how the pros got their start? Oh, yeah, probably by drawing weather forecasts and showing them to friends and family. And that's what I'm gonna do, one day, is be one of the pros. And I'll be sure to come by here one day and let you all know when that happens.

I think that's the best post I've ever seen from you, Geek.
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747. PedleyCA 1:57 AM GMT on August 12, 2012    
Quoting HurricaneHunterJoe:
And yes it's been very warm 94-102, today was the hottest.


I like your weather better, I am on 6 days straight over 100 and my water cooler isn't working. Having to use the AC too much.
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748. floridaT 1:59 AM GMT on August 12, 2012    
It WAS 1963. I was 7 years old. we lived in a three block suburb in the middle of corn fields. My family was watching Harmon Killabrew hoping for one of his home runs. My dad looked out the front window and said "HOLY EXPLITIVE " and unexplainable to us at the time threw myself and my 3 brothers down the stairs our mother tumbling behind us into the basement. My father then threw himself on top of us as the world shaked. I remember my dad saying over and over it will be all right as our home creaked and cracked above us.It was the days before warnings and sirens. It was over soon. We climbed up the stairs not looking into our kitchen but looking into a night sky.My life that summer changed so fast. Our home became busy with material deliveries, neighbors, and workmen that descended upon us to put our life and home back together.At that moment I became enthralled with weather.Not my choice for an occupation but I always looked at the sky now. I never lost the awe factor in what mother nature can do. I love a good thunderstorm. Fast forward to a couple years ago. I was able to witness Wilma first hand from the 5th floor on a beach on Marco Island. Im still in awe.Now as I get older I am concerned with whats happening with our planet. So weather study is a hobby and a passion with me as im sure it is with most of my fellow wunderbloggers.We are all here because we have experienced something like I had or are just plain interested. I also find most on here agree with me that we are never too old to learn. So when someone says we are a bunch of waiters, im upset. Plus most waiters I know are far too intelligent to make such a statement.
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749. Tribucanes 1:59 AM GMT on August 12, 2012    
He made a statement that was open to interpretation. Some took it one way, some took it another. I can see numerous ways to interpret what he said. My point was, he came on trolling. Doesn't mean he's a troll. He made one comment, then left; knowing the bait would be taken. And now 20 comments have been made on his one. Trolling is such a petty thing to do in my opinion.
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750. hydrus 2:01 AM GMT on August 12, 2012    
Quoting Hurricanes101:


Wow you think that was a great post? He basically told everyone on this blog that we are not allowed to have discussions on the tropics unless we agree with the NHC

screw that
"One thing is certain: the NHC is never as wrong as 90% of the weather "prognosticators" on this blog. I'm always amused to read the opinion of a waiter with 9 hours of meterology credits at a local community college tell Dr Masters they "respectfully disagree" with his assesment of the tropics when the doc says a system is likely to not hit the CONUS."(((((((((How on Earth do you arrive at the conclusion that he or she even remotely meant to say that we are not allowed to have a discussion without agreeing with the NHC.? I know what I have seen and read here on more than one occasion. 90% is out of this world inaccurate, but there is a percentage of people who I have seen put the NHC down in a more than disrespectful manner because they felt that there judgement call was somehow superior or even more important. Of course we are going to have disagreements. We are attempting to predict something that sometimes cannot be predicted. Especially times when everybody gets it wrong on the same fricken system. I believe the message was, that at the end of the day, the NHC, right or wrong makes the decisions that always have, and always will save lives. If there is a storm that needs reviewing? At the end of every season they do just that " review " and if there was an error, rest assured they will correct it.
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751. WxGeekVA 2:02 AM GMT on August 12, 2012    
Quoting TropicalAnalystwx13:

I think that's the best post I've ever seen from you, Geek.


Thanks man!
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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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