Dr. Jeff Masters' WunderBlog

Tropical Storm Agatha, Pacaya volcano kill 15 in Guatemala; oil spill update
Posted by: Dr. Jeff Masters, 02:39 PM GMT on Maj 30, 2010 +2
Tropical Storm Agatha, the first Eastern Pacific named storm of 2010, was short lived but deadly. Agatha was a tropical storm for just 12 hours, making landfall Saturday on the Pacific coast of Guatemala as a 45 mph tropical storm. However, the storm brought huge amounts of moisture inland that continue to be wrung out as heavy rains by the high mountains of Guatemala and the surrounding nations of Central America. So far, flooding and landslides have killed twelve people in Guatemala, and one person in neighboring El Salvador. According to the excellent Guatemala weather site, climaya.com, rainfall amounts of up to 152 mm (six inches) in 24 hours have occurred in some regions of Guatemala. The National Hurricane Center is warning that rainfall amounts of up to 30 inches may fall the next few days in some mountainous regions near where the storm has dissipated. Adding to the mayhem is fallout from the Pacaya volcano in Guatemala, which began erupting three days ago. At least three people have been killed by the volcano, located about 25 miles south of the capital, Guatemala City. The volcano has destroyed 800 homes with lava and brought moderate ash falls to the capital.


Figure 1. Visible satellite image of Tropical Storm Agatha at landfall. The storm was intensifying right up until landfall, and had an impressive "hot tower" of building cumulonimbus clouds near its center that brought heavy rains to Guatemala.


Figure 2. Flooding in Quetzaltenango, Zone 2, in Guatemala on May 29, 2010, after heavy rains from Tropical Storm Agatha. Image credit: Carlos Diaz, climaya.com

Oil spill update
Light onshore winds out of the south are expected to blow over the northern Gulf of Mexico today through Tuesday, resulting increased threats of oil to the Alabama and Mississippi barrier islands, according to the latest trajectory forecasts from NOAA. Winds are expected to shift to southwesterly on Wednesday and continue through Friday, increasing in force to 10 - 20 knots late in the week as a cold front approaches the Gulf. These persistent and strengthening southwesterly winds will likely bring oil very close to shore from Mississippi to the Florida Panhandle by next weekend.

Oil spill resources
My post, What a hurricane would do the Deepwater Horizon oil spill
My post Wednesday with answers to some of the common questions I get about the 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 trajectory forecasts
Deepwater Horizon Unified Command web site
Oil Spill Academic Task Force
University of South Florida Ocean Circulation Group oil spill forecasts
ROFFS Deepwater Horizon page
Surface current forecasts from NOAA's HYCOM model
Synthetic Aperture Radar (SAR) imagery from the University of Miami

Join the "Hurricane Haven" with Dr. Jeff Masters: a new Internet radio show
Beginning next week, I'll be experimenting with a live 1-hour Internet radio show called "Hurricane Haven." The show will be aired at 4pm EDT on Tuesdays, with the first show June 1. Listeners will be able to call in and ask questions. Some topics I'll cover on the first show:

1) What's going on in the tropics right now
2) Preview of the coming hurricane season
3) How a hurricane might affect the oil spill
4) How the oil spill might affect a hurricane
5) New advancements in hurricane science presented at this month's AMS Conference on Hurricanes and Tropical Meteorology
6) Haiti's vulnerability to a hurricane this season

I hope you can tune in to the broadcast, which will be at http://www.wunderground.com/wxradio/wubroadcast.h tml. If not, the show will be recorded and stored as a podcast.

I'll probably be back Monday with a quick update. Have a great holiday weekend!

Jeff Masters
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951. scott39 12:35 AM GMT on Maj 31, 2010    
Quoting Skyepony:


Looks like the flare east of the leewards should get carried quick to the NE (to fast for development) & absorbed in the low that is currently off the NE US but should be more by Greenland when they combine.

Scott~ It's hard to say with confidence til we see if the anticyclone makes it. Til then I can only go with a slim outside chance of a TD or TS hitting FL in ~4 days, better chance of a heavy rain.
Thanks Sky, Do the steering currents have it going due N after the Yucatan Channel?
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953. xcool 12:36 AM GMT on Maj 31, 2010    
FIU2010 ok .
Member Since: September 26, 2009 Posts: 2 Comments: 15503
955. aspectre 12:37 AM GMT on Maj 31, 2010    
916 hurricanejunky "I'll be waiting with baited breath...SIGH!"

No no, no no, no no no, it's "I'll be waiting with baited breath...chum."
Member Since: August 21, 2007 Posts: 0 Comments: 4846
956. superweatherman 12:39 AM GMT on Maj 31, 2010    
I think it has a good chance to become Alex... remember....


In less than three hours it went from nothing to a Tropic storm and then a few hours later it was packing winds of 90mph...
and with this in the Caribbean
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957. xcool 12:39 AM GMT on Maj 31, 2010    
i give 20% storms get name..
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958. Hurricanes101 12:39 AM GMT on Maj 31, 2010    
Quoting superweatherman:
I think it has a good chance to become Alex... remember....


In less than three hours it went from nothing to a Tropic storm and then a few hours later it was packing winds of 90mph...
and with this in the Caribbean


Humberto also formed in September not May, I dont think the shear would allow for that kind of development
Member Since: Marts 10, 2010 Posts: 1 Comments: 6902
959. PcolaDan 12:40 AM GMT on Maj 31, 2010    
BWAAAAAHAHAHAHAHA

I just read something very funny a few posts back. Can you guys guess which one it is? Best laugh I've had in ages. (btw that's a rhetorical question) :)

BWAAAAAAHAHAHAHA
Member Since: August 22, 2008 Posts: 12 Comments: 6008
960. SevereHurricane 12:40 AM GMT on Maj 31, 2010    
Quoting DestinJeff:


Forecast of the Season brought to you by:




LOL!
Member Since: September 7, 2008 Posts: 17 Comments: 1604
961. Hurricanes101 12:41 AM GMT on Maj 31, 2010    
Quoting PcolaDan:
BWAAAAAHAHAHAHAHA

I just read something very funny a few posts back. Can you guys guess which one it is? Best laugh I've had in ages. (btw that's a rhetorical question) :)

BWAAAAAAHAHAHAHA


Does it have to do with seahorses and fish by any chance? lol
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962. Skyepony (Mod) 12:42 AM GMT on Maj 31, 2010    
Quoting scott39:
Thanks Sky, Do the steering currents have it going due N after the Yucatan Channel?


If it stays shallow, weak, unorganized yes. If for some reason it turned into a hurricane right off Belize it should hit Cuba.
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963. superweatherman 12:42 AM GMT on Maj 31, 2010    
Quoting Hurricanes101:


Humberto also formed in September not May, I dont think the shear would allow for that kind of development


But also remember this is not 2007 this is 2010 the temperatures are very high for this time of year
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964. kmanhurricaneman 12:43 AM GMT on Maj 31, 2010    
oh boy!! ...........
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965. clwstmchasr 12:43 AM GMT on Maj 31, 2010    
Atmospheric conditions were very different for Humberto. Wind shear values are marginal in the NW Caribbean and very unfavorable in the GOM.
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966. Skyepony (Mod) 12:43 AM GMT on Maj 31, 2010    
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968. MiamiHurricanes09 12:43 AM GMT on Maj 31, 2010    
Member Since: September 2, 2009 Posts: 129 Comments: 19976
969. CaicosRetiredSailor 12:44 AM GMT on Maj 31, 2010    
Quoting BahaHurican:
Love the beard.... and I don't know if u could get a dogfish that size outside the land and sea park these days....


I'm sorry to hear that. I can still remember the licking I took swimming to the surface with that fish. If you look close at the photo you can see the spear hole just behind the cheek plate. It went clear through and I swam up with one hand each side of his head as he thrashed wildly. (I was thankful for the wetsuit jacket!)
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970. Nolehead 12:44 AM GMT on Maj 31, 2010    
yep DestinJeff....he seems to always change his name every year....same BS questions and as always no answers at all...lol
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971. sirmaelstrom 12:44 AM GMT on Maj 31, 2010    
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972. Hurricanes101 12:44 AM GMT on Maj 31, 2010    
Quoting superweatherman:


But also remember this is not 2007 this is 2010 the temperatures are very high for this time of year


SSTs can be 120 degrees but if shear is hostile, no development will occur
Member Since: Marts 10, 2010 Posts: 1 Comments: 6902
973. scott39 12:44 AM GMT on Maj 31, 2010    
Quoting PcolaDan:
BWAAAAAHAHAHAHAHA

I just read something very funny a few posts back. Can you guys guess which one it is? Best laugh I've had in ages. (btw that's a rhetorical question) :)

BWAAAAAAHAHAHAHA
Does it have anything to do with a forecast and all this purple carbon stuff on the forecasters hand?
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974. superweatherman 12:44 AM GMT on Maj 31, 2010    
that is why I posted this pic...
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975. clwstmchasr 12:44 AM GMT on Maj 31, 2010    

But also remember this is not 2007 this is 2010 the temperatures are very high for this time of year


Yes, water temps are above normal but they are not in the upper 80's yet (values we will see in another month).
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976. stormwatcherCI 12:45 AM GMT on Maj 31, 2010    
Quoting BahaHurican:
Did anybody else catch u on this??? lol

ARUBA..... not Abaco....
Yes. I caught myself too a few minutes after I posted it but too late to edit. Looks like I am not Infallible either. LOL
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977. SevereHurricane 12:46 AM GMT on Maj 31, 2010    
Quoting sirmaelstrom:
Hmmm.....Is FIU2010 = Christine Riedel?

http://www.aolnews.com/the-grid/article/2010-hurricane-forecast-scorecard/19495922


Dang, JFV! Back to plagiarism again?
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978. Hurricanes101 12:46 AM GMT on Maj 31, 2010    
Quoting sirmaelstrom:
Hmmm.....Is FIU2010 = Christine Riedel?

http://www.aolnews.com/the-grid/article/2010-hurricane-forecast-scorecard/19495922


wow nice job of plagiarism there FIU or whoever you are
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980. BahaHurican 12:47 AM GMT on Maj 31, 2010    
Quoting aspectre:
916 hurricanejunky "I'll be waiting with baited breath...SIGH!"

No no, no no, no no no, it's "I'll be waiting with baited breath...chum."
Should actually be bated breath, (as in held) but I see u one pun. lol
Member Since: Oktober 25, 2005 Posts: 19 Comments: 17682
981. Bordonaro 12:47 AM GMT on Maj 31, 2010    
Quoting sirmaelstrom:
Hmmm.....Is FIU2010 = Christine Riedel?

http://www.aolnews.com/the-grid/article/2010-hurricane-forecast-scorecard/19495922

Wow, plagiarism at its finest :o)!!
This blog is a place to learn and share information, ideas, forecast info, tropical cyclone discussions, etc. Whatever DR M puts up for discussion is great with me.

I cannot guestimate or forecast TC development if my life depended on it. I have eaten alot of crow!

My areas of knowledge are in the winter storm and severe storm categories. There I do very well. My ideas and thoughts are my own. Plagiarism is not a wise way to learn anything good!!!
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984. superweatherman 12:48 AM GMT on Maj 31, 2010    



It look like it is dropping where Agatha is coming off shore
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985. Hurricanes101 12:48 AM GMT on Maj 31, 2010    
FIU your blog has been flagged and reported for plagiarism
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986. stormwatcherCI 12:49 AM GMT on Maj 31, 2010    
Quoting CaicosRetiredSailor:


I'm sorry to hear that. I can still remember the licking I took swimming to the surface with that fish. If you look close at the photo you can see the spear hole just behind the cheek plate. It went clear through and I swam up with one hand each side of his head as he thrashed wildly. (I was thankful for the wetsuit jacket!)
Also see in the pic you got a 2fer.
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987. hydrus 12:49 AM GMT on Maj 31, 2010    
Quoting Hurricanes101:


SSTs can be 120 degrees but if shear is hostile, no development will occur
A large weather system over 120 degree water could withstand a lot of shear. lol..jk
Member Since: September 27, 2007 Posts: 1 Comments: 14314
988. Hurricanes101 12:49 AM GMT on Maj 31, 2010    
Quoting hydrus:
A large weather system over 120 degree water could withstand a lot of shear. lol..jk


lol would be interesting to see how that would work out
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989. Relix 12:49 AM GMT on Maj 31, 2010    
OMG JFV is back and worse than ever. Jesus man, act mature, you are being worse than a child. Everyone here is discussing serious things and you go posting "FLAGGED/REPORTED" like it actually mattered, especially coming from a guy who has spammed at LEAST 10 times to check his blog. Gain credentials, do good forecasts, and people WILL visit your blog. Don't spam it, you don't see others doing it.

Anyway, after feeding the troll, ex-Agatha has potential to become Alex =O I frankly doubt she can become anything of note, though admittedly my prayers are with the over 80 that have died in Central America because of it.
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991. kmanhurricaneman 12:51 AM GMT on Maj 31, 2010    
huh...............
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992. CaicosRetiredSailor 12:52 AM GMT on Maj 31, 2010    
Quoting stormwatcherCI:
Also see in the pic you got a 2fer.


...sorry, but no, the lobster was one of them we got that day, but it's placement was just done for the photo.
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994. BahaHurican 12:52 AM GMT on Maj 31, 2010    
Quoting stormwatcherCI:
Yes. I caught myself too a few minutes after I posted it but too late to edit. Looks like I am not Infallible either. LOL
Well, I'm not going to look before I post that the capital of Caymans is George Town, just like Georgetown, Exuma (and I'm pretty sure I'm wrong about that.... lol). I just thought the Aruba-Abaco thing was funny, given that Abaco is one of the most-often-hit islands, TC-wise, while Aruba is one of the least hit...... lol
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995. scott39 12:52 AM GMT on Maj 31, 2010    
My forecast is------ JFV is never going away!
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996. Hurricanes101 12:53 AM GMT on Maj 31, 2010    
Quoting DestinJeff:
Come on ... don't report FIU yet! Too much fun having him around. Now we'll have to spend 3 minutes figuring out the new screen name once the FIU moniker gets 86d.


you should create a blog and have people submit their guesses lol

I think the next name should be

ShowerCurtainKing
Member Since: Marts 10, 2010 Posts: 1 Comments: 6902
998. SevereHurricane 12:53 AM GMT on Maj 31, 2010    
Quoting DestinJeff:
Come on ... don't report FIU yet! Too much fun having him around. Now we'll have to spend 3 minutes figuring out the new screen name once the FIU moniker gets 86d.


That's why I never report him.
Member Since: September 7, 2008 Posts: 17 Comments: 1604
999. stormwatcherCI 12:53 AM GMT on Maj 31, 2010    
Quoting CaicosRetiredSailor:


...sorry, but no, the lobster was one of them we got that day, but it's placement was just done for the photo.
LOL. Thought it was great luck for you that day. Nice lobster too BTW.
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1000. HurricaneSwirl 12:54 AM GMT on Maj 31, 2010    
Quoting sirmaelstrom:
Hmmm.....Is FIU2010 = Christine Riedel?

http://www.aolnews.com/the-grid/article/2010-hurricane-forecast-scorecard/19495922


WOW!! I can't believe I'm surprised though. I was actually giving JFV some light props in my lurking stage lol. Flagged. I hope he's gone for life, but he always finds away around his bans.
Member Since: Juli 7, 2008 Posts: 2 Comments: 3237

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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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