Dr. Jeff Masters' WunderBlog

Bonnie barely alive
Posted by: Dr. Jeff Masters, 12:58 PM GMT on July 24, 2010 +3
Tropical Depression Bonnie is barely clinging to life. Wind shear of 25 knots and dry air from an upper-level low pressure system over the Gulf of Mexico are taking their toll on Bonnie, which is now just a swirl of low clouds accompanied by a small clump of heavy thunderstorms on the north side of the center of circulation. These thunderstorms are now visible on New Orleans long range radar, and will arrive in coastal Louisiana early this afternoon, well ahead of the center. The Hurricane Hunters are in Bonnie, and have found a much weaker storm with top winds of just 30 mph.


Figure 1. Morning satellite image of Tropical Depression Bonnie. At the time, Bonnie had sustained winds of 30 mph.

Forecast for Bonnie
The current NHC forecast for Bonnie looks good, with the storm making landfall in Louisiana near 9pm CDT Saturday night. According to the latest tide information, this will be near the time of low tide. This will result in much less oil entering the Louisiana marshlands than occurred during Hurricane Alex in June. That storm brought a storm surge of 2 - 4 feet and sustained winds of 20 - 30 mph that lasted for several days, including several high tide cycles. Bonnie will be lucky to be a tropical depression at landfall, and should only create a storm surge of 1 - 2 feet that will come at low tide. This will result in a storm tide level that will inundate land to at most one foot above ground level.

Resources for the BP oil disaster
Map of oil spill location from the NOAA Satellite Services Division
My post, What a hurricane would do the Deepwater Horizon oil spill
My post on the Southwest Florida "Forbidden Zone" where surface oil will rarely go
My post on what oil might do to a hurricane
NOAA's interactive mapping tool to overlay wind and ocean current forecasts, oil locations, etc.
Gulf Oil Blog from the UGA Department of Marine Sciences
Oil Spill Academic Task Force
University of South Florida Ocean Circulation Group oil spill forecasts
ROFFS Deepwater Horizon page
Synthetic Aperture Radar (SAR) imagery from the University of Miami

Elsewhere in the tropics
There are no other threat areas of concern today. The only model calling for possible tropical development in the next week is the NOGAPS model, which predicts a strong tropical disturbance could form off the coast of Nicaragua in the Southwest Caribbean about a week from now.

Next update
The next updates will be by wunderground meteorologists Rob Carver and Shaun Tanner. I'm taking advantage of a break in the tropical action to take a few days away. I'll be back blogging on Friday, at the latest.

Jeff Masters
Categories: Hurricane
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801. bappit 11:30 PM GMT on July 24, 2010    
You need to look more at the CMC and FIMZ to see systems

Don't know about FIMZ, but CMC was new and improved last year. See the page on the models on the WU tropical weather link page. It is labeled "last updated in 2007" but actually was last updated in July 2009. The CMC is not supposed to spin 'em up so easily anymore.
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802. tkeith 11:31 PM GMT on July 24, 2010    
799. xcool 6:25 PM CDT on July 24, 2010

Bonnie has a huge eye...

IWRC?

fallinstorms, what are your thoughts on this?
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803. KEEPEROFTHEGATE (Mod) 11:32 PM GMT on July 24, 2010    
AOI/XX/XL
MARK
12.4N/80.3W
Member Since: July 15, 2006 Posts: 143 Comments: 40413
806. stormwatcherCI 11:33 PM GMT on July 24, 2010    
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807. ackee 11:35 PM GMT on July 24, 2010    
question FIMZ that new model can some one tell me more about this model thanks
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809. xcool 11:37 PM GMT on July 24, 2010    
tkeith .chances for rain .nothing to major .;)
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810. InTheCone 11:37 PM GMT on July 24, 2010    
Storm, you still on??


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811. SLU 11:38 PM GMT on July 24, 2010    
Quoting StormW:


Welcome, thanks for reading!


Fabulous downcaster eye opener Storm. Keep it up!

With the amount of crow that's going to be eaten at the end of this hurricane season, black birds will be an endangered species.
Member Since: July 13, 2006 Posts: 11 Comments: 2846
812. nrtiwlnvragn 11:38 PM GMT on July 24, 2010    
Quoting bappit:
You need to look more at the CMC and FIMZ to see systems

Don't know about FIMZ, but CMC was new and improved last year. See the page on the models on the WU tropical weather link page. It is labeled "last updated in 2007" but actually was last updated in July 2009. The CMC is not supposed to spin 'em up so easily anymore.


The basis that the CMC did not spin 'em up was based on one year experience with the model. So far this year it seems to be up to it's old tricks, just my opinion.
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813. nrtiwlnvragn 11:40 PM GMT on July 24, 2010    
Quoting ackee:
question FIMZ that new model can some one tell me more about this model thanks


You can read about it on the FIM Model Page
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814. KEEPEROFTHEGATE (Mod) 11:40 PM GMT on July 24, 2010    
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815. jlp09550 11:41 PM GMT on July 24, 2010    


Any idea on the direction of the low pressure?
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816. stormpetrol 11:41 PM GMT on July 24, 2010    
SW Caribbean starting to look interesting!
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817. Progster 11:44 PM GMT on July 24, 2010    
Quoting stormpetrol:
SW Caribbean starting to look interesting!


And another one...Bay of Campeche RGB...looks like a mid level swirl...maybe even lower...on this imagery

Link
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818. clwstmchasr 11:44 PM GMT on July 24, 2010    
Hey StormW, I know that La Nina causes a reduction in wind shear. However, Bonnie was killed by wind shear from an ULL. Is there a predictor of the continuation of ULL's that would keep the wind shear at high values?
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819. stormpetrol 11:44 PM GMT on July 24, 2010    
Quoting stormwatcherCI:

That sure blew up suddenly looking more compact than the disorganized showers earlier, might be our next AOI, not to mention the BOC/GOM, not sure which would qualify.
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821. xcool 11:46 PM GMT on July 24, 2010    
clwstmchasr 11. ULL.
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822. stormwatcherCI 11:46 PM GMT on July 24, 2010    
Quoting stormpetrol:

That sure blew up suddenly looking more compact than the disorganized showers earlier, might be our next AOI, not to mention the BOC/GOM, not sure which would qualify.
I know. I didn't see anything like that there this a.m. but was surprised when I looked at it this evening.
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823. KEEPEROFTHEGATE (Mod) 11:46 PM GMT on July 24, 2010    
AOI/XX/XL
MARK
12.4N/80.3W
Member Since: July 15, 2006 Posts: 143 Comments: 40413
824. stormwatcherCI 11:47 PM GMT on July 24, 2010    
Quoting KEEPEROFTHEGATE:
AOI/XX/XL
MARK
12.4N/80.3W
Good evening KOG. Do you think there is any possibility for development there ?
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827. SouthALWX 11:49 PM GMT on July 24, 2010    
SW carribean looks like upper divergence triggered.... the Boc on the other hand is starting to have clockwise turning at the upper levels as the ULL pulls north. That needs to be watched
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828. tkeith 11:49 PM GMT on July 24, 2010    
Quoting xcool:
tkeith .chances for rain .nothing to major .;)
not one drop in Kenner so far X...
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829. xcool 11:50 PM GMT on July 24, 2010    
tkeith :( .
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831. CanesfanatUT 11:50 PM GMT on July 24, 2010    
Quoting southlouisiana:
CanesfanatUT> I work for XOM - Gustav was a major surprise to the BR complex.

What do you mean stay level?


Yeah Rita was the same surprise for us. And I didnt quite mean "stay level". Maybe I just didnt express myself well. I am surprised that the prices aren't more volatile than they are given how delicate and how easily disrupted the supply chain is...and the precautions needed as a margin of safety at all times but especially during hurricane season. That would have been a better way of saying it. Or as you put it...



CanesfanatUT> I don't think people realize how close this country was to having a significant portion of the population with little to no access to motor fuel.

Exactly! Given the tight supplies, the dangers to and of production, transporting and then refining oil it is either stand amazed or worry yourself sick at the narrow margin between society and huge energy disruptions. It wouldn't take much to start the dominoes toppling.



Well the market definitely moves with a tropical system in the Gulf. It's not a huge move upward in normal years (2008 with 147$ crude isn't normal) if it's a relatively minor system. But given the right path - from Corpus to, say NOLA - and a major system, prices would jump pretty significantly because now you aren't just shutting in production offshore (so crude inventories go down) but you are also shutting down refineries (so mogas and diesel inventories go down). So it's a double whammy to the entire market structure.

Really anything in the Gulf north of Mexico will have a real impact to crude supplies. But a storm would have to make landfall in a pretty clustered part (north TX and Looziana) to really impact any significant amount of refineries. A Mississippi or AL or FL landfall would really only impact Chevron's refinery (unless NO floods again...).

You've mention something that I'm not sure anyone really knows - that's how important it is to evacuate all your employees if you are offshore or right on the coast. Our Beaumont chemical plant was flooded to the tune of 10 to 12 feet during Ike. If we had kept anyone in there - people would have died.

So I know people b*tch about gas prices when companies shut stuff down, but you gotta think of the employees. We don't want anyone "cowboyin' up" and having people injured or dead, do we?
No one really thinks about that side - they just see the price at the pump.


So if you feel yourself starting to get PO'ed in whatever part of the country you are in when prices rise ahead of landfall of a major - think of this dude or me, we are down there trying to get the hell out.
We'll get our plants back up as soon as possible. But if we get flooded - expect it to take a while, sea water and electronics don't mix.
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832. stormpetrol 11:50 PM GMT on July 24, 2010    
Quoting P451:
X-Bonnie still has some pretty good storms it's going to bring into the coastline.




And the so called remnants of Bonnie Trucking westward and keeping off shore and is ULL disappearing from the scene!
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833. KEEPEROFTHEGATE (Mod) 11:51 PM GMT on July 24, 2010    
Quoting stormwatcherCI:
Good evening KOG. Do you think there is any possibility for development there ?
not sure there was a collision of energy there and its firing up good if it can keep the pace and expand we could have somin
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834. Hurricanes101 11:51 PM GMT on July 24, 2010    
last few frames to me show the area in the BOC starts to nudge to the NNE, a low is forming as well

If this system moves back offshore, it needs to be watched
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835. Patrap 11:51 PM GMT on July 24, 2010    
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836. Patrap 11:52 PM GMT on July 24, 2010    



NEXRAD Radar
New Orleans, Velocity Azimuth Display Wind Profile Range 124 NMI

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838. Hurricanes101 11:52 PM GMT on July 24, 2010    
8pm TWO is out, 2 yellow circles, both at near 0%

1 for Ex-Bonnie
1 for the low pressure area in the SW BOC
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839. CaicosRetiredSailor 11:52 PM GMT on July 24, 2010    
TROPICAL WEATHER OUTLOOK
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
800 PM EDT SAT JUL 24 2010

FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...

THE NATIONAL HURRICANE CENTER HAS ISSUED ITS LAST ADVISORY ON
TROPICAL DEPRESSION BONNIE. THE REMNANT LOW OF BONNIE IS CENTERED
ABOUT 65 MILES SOUTHEAST OF THE MOUTH OF THE MISSISSIPPI RIVER...AND
IS PRODUCING DISORGANIZED THUNDERSTORM ACTIVITY. RE-DEVELOPMENT OF
THE SYSTEM IS NOT EXPECTED BEFORE THE LOW REACHES THE NORTHERN GULF
COAST LATE TONIGHT OR EARLY SUNDAY. THERE IS A LOW CHANCE...NEAR 0
PERCENT
...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE
NEXT 48 HOURS.

AN AREA OF SHOWERS AND THUNDERSTORMS OVER THE SOUTHWESTERN GULF OF
MEXICO IS ASSOCIATED WITH A BROAD LOW PRESSURE AREA CENTERED ALONG
THE COAST OF MEXICO NEAR TUXPAN. DEVELOPMENT OF THIS SYSTEM IS NOT
EXPECTED DUE TO ITS PROXIMITY TO LAND. THERE IS A LOW CHANCE...
NEAR 0 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING
THE NEXT 48 HOURS.

ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE
NEXT 48 HOURS.

$$
FORECASTER BEVEN
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840. Patrap 11:53 PM GMT on July 24, 2010    
NEXRAD Radar
New Orleans, Echo Tops Range 124 NMI

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841. Patrap 11:54 PM GMT on July 24, 2010    
Quoting DestinJeff:


the Ghost of 95L?


Without the Frontal attachment..?
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842. xcool 11:54 PM GMT on July 24, 2010    
Member Since: September 26, 2009 Posts: 2 Comments: 15501
844. InTheCone 11:56 PM GMT on July 24, 2010    
Quoting CanesfanatUT:


Well the market definitely moves with a tropical system in the Gulf. It's not a huge move upward in normal years (2008 with 147$ crude isn't normal) if it's a relatively minor system. But given the right path - from Corpus to, say NOLA - and a major system, prices would jump pretty significantly because now you aren't just shutting in production offshore (so crude inventories go down) but you are also shutting down refineries (so mogas and diesel inventories go down). So it's a double whammy to the entire market structure.

Really anything in the Gulf north of Mexico will have a real impact to crude supplies. But a storm would have to make landfall in a pretty clustered part (north TX and Looziana) to really impact any significant amount of refineries. A Mississippi or AL or FL landfall would really only impact Chevron's refinery (unless NO floods again...).

You've mention something that I'm not sure anyone really knows - that's how important it is to evacuate all your employees if you are offshore or right on the coast. Our Beaumont chemical plant was flooded to the tune of 10 to 12 feet during Ike. If we had kept anyone in there - people would have died.

So I know people b*tch about gas prices when companies shut stuff down, but you gotta think of the employees. We don't want anyone "cowboyin' up" and having people injured or dead, do we?
No one really thinks about that side - they just see the price at the pump.


So if you feel yourself starting to get PO'ed in whatever part of the country you are in when prices rise ahead of landfall of a major - think of this dude or me, we are down there trying to get the hell out.
We'll get our plants back up as soon as possible. But if we get flooded - expect it to take a while, sea water and electronics don't mix.



Nice Post, most folks just think that the evil companies are just out to screw the "little guy", while in reality the "litte guy" is working to help them. Media in this country is less than stellar!
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845. stormwatcherCI 11:56 PM GMT on July 24, 2010    
Quoting KEEPEROFTHEGATE:
not sure there was a collision of energy there and its firing up good if it can keep the pace and expand we could have somin
Thanks. It's just that it seemed to blow up so sudden kinda like 98L.
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846. xcool 11:57 PM GMT on July 24, 2010    
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848. Dennis8 11:59 PM GMT on July 24, 2010    
An area of showers and thunderstorms over the southwestern Gulf of
Mexico is associated with a broad low pressure area centered along
the coast of Mexico near Tuxpan. Development of this system is not
expected due to its proximity to land. There is a low chance...
near 0 percent...of this system becoming a tropical cyclone during
the next 48 hours.

THE NHC does NOT say the AOI in the BOC is moving inland . Just close to Tuxpan. The satellite presentation on visible is better than Bonnie was at any time. 0% can be 100% in 6 hours. Take it from a person who has been in 15 Storms on the Texas coast.
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849. stormpetrol 11:59 PM GMT on July 24, 2010    
PLease nothing personal againt the NHC, they do a hell of a job despite the pressures placed on them I imagine, But please no more yellow circles unless they are at least 10%.
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851. NOLA70130 12:01 AM GMT on July 25, 2010    
Is this thing going to bring any rain to NOLA?

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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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