Dr. Jeff Masters' WunderBlog

World's deadliest weather disaster of 2010: Rio de Janeiro floods kill at least 183
Posted by: Dr. Jeff Masters, 5:06 PM GMT on April 09, 2010 +2
The world's deadliest and most expensive weather disaster so far this year hit Brazil this week, where at least 183 people are dead due to flooding and mudslides in the Rio de Janeiro region. Damage from the flooding has been estimated at 23.76 billion reais (US$13.3bn, €9.9bn), about 8% of the gross domestic product (GDP) of Rio de Janeiro State. Rio's heavy rains began near 5 pm local time (2000 UTC) on Monday April 5, and continued for 24 hours, with a total of 28.8 cm (11.5") of rain falling--more than the average rainfall for the entire month of April. It was the heaviest rainfall ever recorded in Brazil's 2nd largest city. The rains triggered devastating mudslides that roared through slums built on steep, unstable hillsides. According to the Associated Press, crews have pulled 17 bodies from the debris so far at at a new mudslide that hit in Niteroi, next to Rio, on April 7. Authorities fear an additional 150 people may have died there.


Figure 1. Flooding from this week's record rains in Rio de Janeiro. Image credit: Carolina Goncalves / Agência Brasil.


Figure 2. A mudslide in Niteroi, next to Rio de Janeiro, is feared to have killed 200 people. Image credit: Vitor Abdala / Agência Brasil.

The previous deadliest weather disaster this year was the snow avalanche in Afghanistan that killed 172 people on February 8 and 9.

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Jeff Masters
Categories: Flood
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401. JRRP 4:30 AM GMT on April 10, 2010    
Quoting pottery:


Join the line, and wait your turn!!
Me first........

jajajajajajajaja
Member Since: August 16, 2007 Posts: 0 Comments: 4357
402. alexhurricane1991 4:37 AM GMT on April 10, 2010    
Is anyone still here its still early LOL!
Member Since: April 8, 2010 Posts: 15 Comments: 2543
404. alexhurricane1991 4:44 AM GMT on April 10, 2010    
Good morning to you cane 2010 did you here about a potential system can form in the short term. of course its not going to be tropical and probably wont matieralize but its a possibility crazy huh.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
406. Stormchaser2007 4:48 AM GMT on April 10, 2010    
Member Since: June 9, 2007 Posts: 4 Comments: 15294
407. SouthDadeFish 4:57 AM GMT on April 10, 2010    
10-20 knots of shear over that flare-up in the CATL. Link
Member Since: August 12, 2007 Posts: 11 Comments: 2441
408. alexhurricane1991 4:58 AM GMT on April 10, 2010    
Wow that looks better than some storms last year LOL!
Member Since: April 8, 2010 Posts: 15 Comments: 2543
409. SouthDadeFish 4:59 AM GMT on April 10, 2010    
But very low vorticity.
Member Since: August 12, 2007 Posts: 11 Comments: 2441
410. CycloneOz 5:04 AM GMT on April 10, 2010    
Why, hello CycloneBoz!

What do you think about this year's hurricane season forecast, kind sir?
Member Since: August 26, 2006 Posts: 10 Comments: 3154
412. CycloneBoz 5:06 AM GMT on April 10, 2010    
Oh, I think it will raise the hairs on the back of your neck, and maybe some other body parts, too :0
Member Since: August 18, 2007 Posts: 1 Comments: 217
413. alexhurricane1991 5:06 AM GMT on April 10, 2010    
Yeah southdadefish its probanly going to hit south america.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
414. wunderkidcayman 5:07 AM GMT on April 10, 2010    
GOOD MORNING GUYS WISH WE HAD SOME OF THAT WEATHER OVER HERE CAYMAN IS DRY DUST AND BAD DROUGHT
Member Since: June 13, 2009 Posts: 2 Comments: 5997
415. Tazmanian 5:10 AM GMT on April 10, 2010    
Quoting pottery:


Join the line, and wait your turn!!
Me first........



NO NO NO


me 1st for the rain
Member Since: May 21, 2006 Posts: 5089 Comments: 111610
416. alexhurricane1991 5:12 AM GMT on April 10, 2010    
you will get your rain its coming at least i hope it is this is supposed to be your wettest month but nothing yet but you gotta have hope.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
417. wunderkidcayman 5:13 AM GMT on April 10, 2010    
Hey guys what do you think is this a possibloe T. wave from 13-14N and 8E-0W
Member Since: June 13, 2009 Posts: 2 Comments: 5997
418. alexhurricane1991 5:14 AM GMT on April 10, 2010    
Hey whats up taz!
Member Since: April 8, 2010 Posts: 15 Comments: 2543
419. Patrap 5:24 AM GMT on April 10, 2010    
CryoSat-2 Launch 2 days ago

Tackling Earth's changing climate is a priority today and ESA is leading this effort, with its Earth observation satellites providing scientists with information on many of the key variables that are affecting our environment, whether these are from natural causes or induced by humans.

ESA's 'Ice Mission' CryoSat-2 will provide data at an unprecedented precision on the rates of melting of ice on land and at sea. The technical issue on the Dnepr rocket that delayed the CryoSat-2 launch last February has now been resolved, and CryoSat launched on 8 April 2010 from the Baikonur Cosmodrome in Kazakhstan.

Member Since: July 3, 2005 Posts: 377 Comments: 112912
421. Tazmanian 5:32 AM GMT on April 10, 2010    
Quoting alexhurricane1991:
Hey whats up taz!


not march


this about ready too hit the hay
Member Since: May 21, 2006 Posts: 5089 Comments: 111610
422. alexhurricane1991 5:35 AM GMT on April 10, 2010    
Hey cycloneoz are you still here?
Member Since: April 8, 2010 Posts: 15 Comments: 2543
423. alexhurricane1991 5:37 AM GMT on April 10, 2010    
Thats cool taz you going to be on tomorrow?
Member Since: April 8, 2010 Posts: 15 Comments: 2543
424. Tazmanian 5:42 AM GMT on April 10, 2010    
Quoting alexhurricane1991:
Thats cool taz you going to be on tomorrow?



yes at times


all so if you ues yahoo IM you can chat with me on there as well my IM name is david_thomas4000


good night all
Member Since: May 21, 2006 Posts: 5089 Comments: 111610
425. Motttt 5:43 AM GMT on April 10, 2010    
Wow Alex.. you shure do post a lot for being shy
Member Since: September 10, 2001 Posts: 0 Comments: 213
426. alexhurricane1991 5:48 AM GMT on April 10, 2010    
Well mottt i am shy but i feel like i know you guys and when i know people i open up.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
427. Motttt 5:54 AM GMT on April 10, 2010    
Your so funny
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428. alexhurricane1991 5:56 AM GMT on April 10, 2010    
What do you mean mottt thats the truth.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
429. wunderkidcayman 5:56 AM GMT on April 10, 2010    
good morning alexhurricane1991 nice to meet you and so far you are doing well and hope you will be grand and I am sure that you will enjoy us guys
Member Since: June 13, 2009 Posts: 2 Comments: 5997
430. wunderkidcayman 6:01 AM GMT on April 10, 2010    
Quoting alexhurricane1991:
What do you mean mottt thats the truth.

it mean you are going to make this blog fun again I wish some of the guys on here would make life on this blog a little easier and fun
Member Since: June 13, 2009 Posts: 2 Comments: 5997
431. alexhurricane1991 6:02 AM GMT on April 10, 2010    
Well thank you wunderkidcayman im already am and cant wait until the blog gets real busy but remember if theres a troll ignore him dont quote him but i know you know that already.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
433. hydrus 6:05 AM GMT on April 10, 2010    
Quoting pottery:


Join the line, and wait your turn!!
Me first........
You will get rain Pottery. The further into the month of April we go, the better chances of your region receiving the wet stuff.
Member Since: September 27, 2007 Posts: 1 Comments: 14626
434. alexhurricane1991 6:08 AM GMT on April 10, 2010    
I know Wunderkidcayman i had to defend myself because they thought i was jfv its like this guy is a cloud that hovers over this blog and whoever comes on for the first time always has to go through the inquisition to prove your not him its ridicoulous.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
435. alexhurricane1991 6:12 AM GMT on April 10, 2010    
Hey hydrus! did you hear about the pending again i say pending storm in the gulf of course it will not be all tropical but its something to look at to ready ourselves and get into blob watching mode.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
437. wunderkidcayman 6:16 AM GMT on April 10, 2010    
Quoting alexhurricane1991:
I know Wunderkidcayman i had to defend myself because they thought i was jfv its like this guy is a cloud that hovers over this blog and whoever comes on for the first time always has to go through the inquisition to prove your not him its ridicoulous.

yea I know what you mean
Member Since: June 13, 2009 Posts: 2 Comments: 5997
438. alexhurricane1991 6:18 AM GMT on April 10, 2010    
Cane2010 you know were im coming from they thought that you were him yesterday and now they did it to me today we have something in common!
Member Since: April 8, 2010 Posts: 15 Comments: 2543
439. alexhurricane1991 6:23 AM GMT on April 10, 2010    
And its not everyone most people are nice on here and makes me feel welcome but there are some that there only purpose is to heckle a person that just want to have conversations about the weather.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
440. wunderkidcayman 6:23 AM GMT on April 10, 2010    
so guys do you think is that line of T.storms is a T.wave located at 13-14N and 8E-0W moving westward

Member Since: June 13, 2009 Posts: 2 Comments: 5997
442. alexhurricane1991 6:27 AM GMT on April 10, 2010    
No i think its just thunderstorms in the itcz the nhc didnt analyze any tropical waves this evening.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
443. Carboniferous 6:33 AM GMT on April 10, 2010    
+100mm storms are quite normal here on Rio de Janeiro, specially in the summer (we had a pair of these last month), but what happened this week was a goddamn deluge. Some neighbourhoods recorded up to 250mm in just 15 hours and more than 300mm at the end of the day. The storm began on April 5 exactly as you told, at 5pm local time, and lasted till April 7; however, an intermittent light-to-moderate rain continues since then. In fact, it's raining right now. But it wasn't even the heavist rainfall recorded in Rio de Janeiro. The heaviest were recorded in 1966 and 1971 and reached up to 350mm in 24 hrs.








This rock just rolled all the way down, passing the highway and reaching the sea

Member Since: March 7, 2010 Posts: 0 Comments: 9
444. wunderkidcayman 6:39 AM GMT on April 10, 2010    
Quoting alexhurricane1991:
No i think its just thunderstorms in the itcz the nhc didnt analyze any tropical waves this evening.


well did you know that that there could be a wave and the NHC does not analyze it
Member Since: June 13, 2009 Posts: 2 Comments: 5997
445. alexhurricane1991 6:43 AM GMT on April 10, 2010    
Yeah i do wunderkidcayman im an amatuer so its just an opinion but you could be right.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
447. Motttt 6:48 AM GMT on April 10, 2010    
cane he is jfv
Member Since: September 10, 2001 Posts: 0 Comments: 213
448. alexhurricane1991 6:50 AM GMT on April 10, 2010    
Thanks for the heads up Cane2010 iv'e been reading this blog for 5 years so i know how it goes down here and dont worry im not going to give the trolls any ammunition im just going to ignore them.
Member Since: April 8, 2010 Posts: 15 Comments: 2543
449. wunderkidcayman 6:51 AM GMT on April 10, 2010    
Quoting Cane2010:
Alex, a quick FYI, from a blogger that's been a member in here, for 4 years now. During cane season, this blog experiences ''extreme'' traffic, plz be ready for that. You'll come across what we refer to as 'trolls''. But at the same time, you'll come across bloggers whom are incrediably savvy when it comes to the field of tropical meteorology. I'm referring to people, such as, Levi32, Hurricane23, TampaSpin, Ike, Drakoen, StormW, Patrap, pressLord, Nash, Weather456, just to name of few. you've prob seen a couple of them on here, already. more of them will be coming out of hybernation, if you will, as the season draws that much closer. these mentioned people, are as reliable as they come, especially during emergency lif-threating situations, liek when a major cane is headed towards our country (heaven forbid). During times like those, it's when you'll see them shine their brightest, if you will, trust me, I can relate to that, ok? So, stick around my friend, it promises to be an interesting 6 months ahead, just watch out for the trolls. :).


it so sad that weather456 had to step down off the blog he was good
Member Since: June 13, 2009 Posts: 2 Comments: 5997
450. wunderkidcayman 6:54 AM GMT on April 10, 2010    
Quoting alexhurricane1991:
Thanks for the heads up Cane2010 iv'e been reading this blog for 5 years so i know how it goes down here and dont worry im not going to give the trolls any ammunition im just going to ignore them.


I think you got everything pat down you are fitting in very good
Member Since: June 13, 2009 Posts: 2 Comments: 5997
451. Motttt 6:55 AM GMT on April 10, 2010    
read back
Member Since: September 10, 2001 Posts: 0 Comments: 213

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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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