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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3203. Tazmanian 6:36 PM GMT on July 26, 2010    
Quoting btwntx08:



WOW where going too flood
Member Since: May 21, 2006 Posts: 5088 Comments: 111306
3204. BenBIogger 6:36 PM GMT on July 26, 2010    
Quoting reedzone:
:O wow, you all did put me on ignore.. All I did was make a prediction, I never said Bonnie was going to be a Hurricane..


Not me.
Member Since: March 19, 2009 Posts: 0 Comments: 1419
3205. xcool 6:37 PM GMT on July 26, 2010    


eat your heart out lolol



Member Since: September 26, 2009 Posts: 2 Comments: 15501
3207. caneswatch 6:39 PM GMT on July 26, 2010    
Quoting BenBIogger:


Not me.


Me neither
Member Since: October 8, 2008 Posts: 14 Comments: 4473
3208. KimberlyB 6:39 PM GMT on July 26, 2010    
Quoting reedzone:
:O wow, you all did put me on ignore.. All I did was make a prediction, I never said Bonnie was going to be a Hurricane..


Not that I'm someone your worried about ignoring you, but I didn't ignore you. I'll never ignore just because a storm proved someone wrong. I only ignore when someone is being caustic for no reason, attacking others for no reason or making ridiculous claims that tie up blog space or endanger lives if folks believe them. This does not apply to you.
Member Since: October 21, 2007 Posts: 27 Comments: 328
3209. reedzone 6:39 PM GMT on July 26, 2010    
In fact, if you wanna dig up info on me, I only said that Bonnie had a 50/50 chance of being a Hurricane, and it didn't happen. I never hyped this storm up, I was being conservative because with the ULL to it's west, there was no telling what could happen. I never pointed at a "Katrina" like storm, I did say that it could ramp up quickly if the ULL kept moving away, but then it stalled. I'm sorry if I somehow "annoyed" you with my prediction which is an opinion, not a statement.
Member Since: July 1, 2008 Posts: 13 Comments: 7247
3211. sailingallover 6:40 PM GMT on July 26, 2010    
Quoting Levi32:


They never admitted that it was separate from Bonnie back when it was hanging onto Bonnie's skirts in the eastern Caribbean. This image is from July 21st:

It was a weak wave that followed behind Bonnie and became unmistakably a separate entity that has traveled westward across the Caribbean and is now moving over the Yucatan. They label these things surface troughs when they suddenly analyze them out of the blue without admitting that they were trackable long before this.



Although the origin of what is over the Yucatan is from the energy that was left behind from the wave that became Bonnie..
There was no wave that ran into the back of Bonnie. It was an induced trough from the convection that sat over us for a 3 days as the trades brought more warm air in behind over the outflow. Back when that was all happening and few people saw the trough and convection and were talking about it developing I posted the ASCATs and Surface analysis for it etc.
The last post of the series was "lets see how it does on it's own" and the other stuff is in front of that..day after is got an AOI with less that 1% chance
Member Since: September 1, 2009 Posts: 23 Comments: 982
3212. xcool 6:40 PM GMT on July 26, 2010    
Convection in Yucatan?
Member Since: September 26, 2009 Posts: 2 Comments: 15501
3213. reedzone 6:41 PM GMT on July 26, 2010    
Quoting KimberlyB:


Not that I'm someone your worried about ignoring you, but I didn't ignore you. I'll never ignore just because a storm proved someone wrong. I only ignore when someone is being caustic for no reason, attacking others for no reason or making ridiculous claims that tie up blog space or endanger lives if folks believe them. This does not apply to you.


Thanks, I only attack those who make bold downcasting or even wishcasting statements.
Member Since: July 1, 2008 Posts: 13 Comments: 7247
3214. reedzone 6:41 PM GMT on July 26, 2010    
Quoting BenBIogger:


Not me.


Ok, just wondering cause I didn't get any replies like most people do
Member Since: July 1, 2008 Posts: 13 Comments: 7247
3215. gordydunnot 6:41 PM GMT on July 26, 2010    
I must say the pacific is looking a little nippy.
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3217. IKE 6:42 PM GMT on July 26, 2010    
Quoting MississippiWx:


LOL. I have a clip for that one too.

Link


LOL!
Member Since: June 9, 2005 Posts: 23 Comments: 37044
3218. xcool 6:43 PM GMT on July 26, 2010    
cv storms cmc ngp gfs
Member Since: September 26, 2009 Posts: 2 Comments: 15501
3220. MTWX 6:45 PM GMT on July 26, 2010    
Quoting reedzone:


Ok, just wondering cause I didn't get any replies like most people do

dont worry... I rarely get replies too
Member Since: July 20, 2009 Posts: 22 Comments: 1215
3222. xcool 6:46 PM GMT on July 26, 2010    
get ready kaboom
Member Since: September 26, 2009 Posts: 2 Comments: 15501
3224. xcool 6:47 PM GMT on July 26, 2010    
next ECMWF
Member Since: September 26, 2009 Posts: 2 Comments: 15501
3226. wayfaringstranger 6:49 PM GMT on July 26, 2010    
StormW,

Have you ever seen so much dry air over the Atlantic off the African coast for this time of year and for this long?

Also, do you see changes in the upper level winds over the Atlantic off the coast of Africa?

Everything that comes off the coast is getting sheared to an oblivion.
Member Since: July 12, 2010 Posts: 0 Comments: 235
3228. outofdablue 6:55 PM GMT on July 26, 2010    
Quoting reedzone:
In fact, if you wanna dig up info on me, I only said that Bonnie had a 50/50 chance of being a Hurricane, and it didn't happen. I never hyped this storm up, I was being conservative because with the ULL to it's west, there was no telling what could happen. I never pointed at a "Katrina" like storm, I did say that it could ramp up quickly if the ULL kept moving away, but then it stalled. I'm sorry if I somehow "annoyed" you with my prediction which is an opinion, not a statement.
Reed, this is from a typical lurker. You seem to be a bright young fellow...please stop using "I" so many times in your sentencing. It make you sound either whinney or arrogant. You used it 8 times in the above quote.
Member Since: July 29, 2009 Posts: 0 Comments: 47
3229. cirrocumulus 6:57 PM GMT on July 26, 2010    
Who thinks the next area around the Yucatan is about to form some disturbance?
Member Since: September 30, 2005 Posts: 0 Comments: 1606
3230. wayfaringstranger 7:00 PM GMT on July 26, 2010    
Quoting cirrocumulus:
Who thinks the next area around the Yucatan is about to form some disturbance?


I was checking that out this morning. Just depends on what the upper level winds will do?
Member Since: July 12, 2010 Posts: 0 Comments: 235
3231. Levi32 7:01 PM GMT on July 26, 2010    
Quoting sailingallover:

Although the origin of what is over the Yucatan is from the energy that was left behind from the wave that became Bonnie..
There was no wave that ran into the back of Bonnie. It was an induced trough from the convection that sat over us for a 3 days as the trades brought more warm air in behind over the outflow. Back when that was all happening and few people saw the trough and convection and were talking about it developing I posted the ASCATs and Surface analysis for it etc.
The last post of the series was "lets see how it does on it's own" and the other stuff is in front of that..day after is got an AOI with less that 1% chance


Um no, there was a weak tropical wave behind Bonnie that was trackable behind her across the Atlantic. It was not a fracture they were always separate. I've been tracking it forever now.

July 20th....





Member Since: November 24, 2005 Posts: 586 Comments: 25439
3232. tropicfreak 7:02 PM GMT on July 26, 2010    
Could anything develop off the cold front that is exiting the east coast?
Member Since: September 2, 2006 Posts: 110 Comments: 6564
3233. IKE 7:02 PM GMT on July 26, 2010    
Latest 12Z ECMWF.
Member Since: June 9, 2005 Posts: 23 Comments: 37044
3234. KimberlyB 7:03 PM GMT on July 26, 2010    
Quoting cirrocumulus:
Who thinks the next area around the Yucatan is about to form some disturbance?


From what I've been reading, from folks far more knowledgeable and experience then I, it has a VERY hard road to travel to become anything. There is a ULL to it's north that will greatly hinder any development. It can't be ruled out entirely, but very unlikely.
Member Since: October 21, 2007 Posts: 27 Comments: 328
3235. unf97 7:03 PM GMT on July 26, 2010    
Good afternoon everyone!

Looks like its time for Dr. Carver to update the blog. Bonnie dying is old news LOL..
Member Since: September 25, 2007 Posts: 0 Comments: 1193
3236. MississippiWx 7:04 PM GMT on July 26, 2010    
The system over the Yucatan could end up being just like TD2. It has a lot of turning in the mid-levels and once it emerges over the BOC, it might work its way down to the surface, just like TD2.
Member Since: July 15, 2006 Posts: 13 Comments: 8495
3237. wayfaringstranger 7:04 PM GMT on July 26, 2010    
Quoting IKE:
Latest 12Z ECMWF.



looks like Pacific activity...
Member Since: July 12, 2010 Posts: 0 Comments: 235
3238. Levi32 7:05 PM GMT on July 26, 2010    
Quoting tropicfreak:
Could anything develop off the cold front that is exiting the east coast?


It should be watched for possible home-grown mischief, though our best chance for that may come with the 2nd front that will drop down in the same area this weekend.
Member Since: November 24, 2005 Posts: 586 Comments: 25439
3239. tropicfreak 7:05 PM GMT on July 26, 2010    
Quoting MississippiWx:
The system over the Yucatan could end up being just like TD2. It has a lot of turning in the mid-levels and once it emerges over the BOC, it might work its way down to the surface, just like TD2.


I agree, unless conditions are absolutely ripe for rapid intensification.
Member Since: September 2, 2006 Posts: 110 Comments: 6564
3240. xcool 7:05 PM GMT on July 26, 2010    
ECMWF.cmc gfs ngp cv storm
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3241. PRweathercenter 7:05 PM GMT on July 26, 2010    
No news , is good news
Member Since: July 21, 2010 Posts: 57 Comments: 913
3242. Hurricanes101 7:06 PM GMT on July 26, 2010    
Ever notice that Ike only posts forecast models when they don't show something lol

not saying its wrong or anything, just an observation
Member Since: March 10, 2010 Posts: 1 Comments: 6902
3243. wayfaringstranger 7:06 PM GMT on July 26, 2010    
Lots and lots of thunderstorm activity here in TN
Member Since: July 12, 2010 Posts: 0 Comments: 235
3244. tropicfreak 7:06 PM GMT on July 26, 2010    
Quoting Levi32:


It should be watched for possible home-grown mischief, though our best chance for that may come with the 2nd front that will drop down in the same area this weekend.


Alright then, because here in the midatlantic we are still rain-needy.
Member Since: September 2, 2006 Posts: 110 Comments: 6564
3245. StormSurgeon 7:06 PM GMT on July 26, 2010    
Quoting caneswatch:


Me neither


Me niether too
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3247. StormSurgeon 7:08 PM GMT on July 26, 2010    
what do you know, Zep's back......cool
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3248. MississippiWx 7:08 PM GMT on July 26, 2010    
Quoting Hurricanes101:
Ever notice that Ike only posts forecast models when they don't show something lol

not saying its wrong or anything, just an observation


Ever think about him doing it because he wants to show GOOD news? Ike is optimistic and there is nothing wrong with that. If a major hurricane is bearing down on someone, Ike isn't going to post false info about it being weak or anything. Until the season surpasses 13 named storms, Ike is just as correct as anyone else on this blog.
Member Since: July 15, 2006 Posts: 13 Comments: 8495
3249. xcool 7:08 PM GMT on July 26, 2010    
ECMWF run on the idea that "Cape Verde"around August 5
Member Since: September 26, 2009 Posts: 2 Comments: 15501
3250. wayfaringstranger 7:09 PM GMT on July 26, 2010    
Quoting DestinJeff:


Somehow I imagine you posting that with a final, forceful click of the mouse button ... like "TAKE THAT!"


Im not much of a Simpsons fan but those icons are priceless

A Simpsons show featuring Steph and Jim Cantore would be interesting.
Member Since: July 12, 2010 Posts: 0 Comments: 235

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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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