Dr. Jeff Masters' WunderBlog

Another flooding mega-disaster: Sri Lanka recovers from extreme flooding
Posted by: Dr. Jeff Masters, 1:14 PM GMT on January 19, 2011 +3
At least 43 are dead and thousands still in refugee camps due to extreme flooding in eastern Sri Lanka caused by record monsoon rains. According to the United Nations, the rains in recent weeks in Sri Lanka have been the heaviest in nearly 100 years of record keeping, and the flood that resulted was a 1-in-100 year event, according to The U.N. Global Disaster Alert and Coordination System. Rainfall at Batticaloa, Sri Lanka, during the 42-day period December 1 - January 12 was 1606 mm (63"), which is about how much rain the station usually receives in an entire year (1651 mm, or 65".) Sri Lanka's previous most devastating flooding disaster was the 2004 tsunami, but as The Economist commented, "in terms of the numbers of people displaced and farmland inundated, the floods have been even more devastating than the tsunami of December 2004." Damage estimates start at $500 million, and much of Sri Lanka's agriculture has been severely damaged by the disaster. Also of concern is the large number of land mines from the recent Sri Lanka civil war that may have been unearthed by the floods. Water is also a major concern in the flood-hit area, as fighting between government forces and Tamil Tigers rebels from mid-2007 to May 2009 damaged or destroyed almost all of the water facilities.


Figure 1. A family affected by the 2011 Sri Lanka floods braves the flood waters. Image credit: United Nations.

Sri Lanka is now the fifth nation in the past six month to suffer a flooding disaster unprecedented in its history. As I reported in a previous post, the other four mega-impact floods--the July 2010 Pakistan floods, the December - January Queensland Australia floods, the November 2010 Colombia floods, and the January 2011 Rio de Janeiro floods--were all accompanied by an atmosphere laden with moisture, due, in part, due to sea surface temperatures over nearby ocean areas that were the 2nd or 3rd warmest on record. However, that was not the case for the Sri Lanka floods. Ocean temperatures during December 2010 were 0.2°C below average in the 5x5 degree square of ocean adjoining the island (5N - 10N, 80E - 85E). The floods appear to be due to the normal monsoon rains that typically affect the region this time of year, enhanced by the strong La Niña event occurring in the Eastern Pacific.


Figure 2. Satellite-estimated precipitation over Sri Lanka for January 3 - 9. Up to 18 inches (525 mm) fell over eastern Sri Lanka. Image credit: NASA Earth Observatory.

Jeff Masters
Categories: Flood
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251. NEwxguy 9:39 PM GMT on January 19, 2011    
Keeper,I sure hope that comes to pass for February,we desperately need some relief,which for the foreseeable future we are still going to continue to get nailed up here.
Member Since: September 6, 2007 Posts: 816 Comments: 13132
253. KEEPEROFTHEGATE (Mod) 9:44 PM GMT on January 19, 2011    
Quoting NEwxguy:
Keeper,I sure hope that comes to pass for February,we desperately need some relief,which for the foreseeable future we are still going to continue to get nailed up here.
look at it this way NE there is only 60 days left of winter then its spring
Member Since: July 15, 2006 Posts: 144 Comments: 40670
254. oracle28 9:45 PM GMT on January 19, 2011    
Quoting Some1Has2BtheRookie:


Your comment lacks any merit. You did not bring any data that either side of the debate could use. I could easily say that that the opposite of wet is dry. Do we really want it drier? Are we able to maintain the same level of moisture content forever?
Unless something else happens along the way, our sun will one day grow into a red giant and destroy all life, as we know it, on Earth. The Earth itself may even be consumed by the sun. We have about 4 - 5 billion years before this is expected to happen. Should I get off and kick the Earth now since it will not support us forever? Should I give up trying to protect our only space capsule through the universe today because of what will happen to it in a few billion years regardless of any efforts I make today?

Do you change the oil in your car?


Maybe sun growth is causing the global warming.
Member Since: July 25, 2008 Posts: 0 Comments: 584
255. Some1Has2BtheRookie 9:46 PM GMT on January 19, 2011    
Quoting PrivateIdaho:
Didn't you hear? Neap went out and bought an SUV and threw all his aluminum cans in the trash.


Idaho, I seldom agree with you, but I like your sense of humor. I'll give you 10 points!
Member Since: August 24, 2010 Posts: 0 Comments: 4105
256. oracle28 9:46 PM GMT on January 19, 2011    
Quoting HIPPOCRITT:
I blasted my AC in my car with the windows down earlier. I hope I have reversed all this Global Warming mumbo jumbo talk :\


I always dump my extra ice on the ground, just to slow the warming. I call it localized man-made global cooling.
Member Since: July 25, 2008 Posts: 0 Comments: 584
257. Patrap 9:49 PM GMT on January 19, 2011    
Well the TPS reports are done.

Heading to Henry's to Quaff a few.
Member Since: July 3, 2005 Posts: 372 Comments: 111641
258. Some1Has2BtheRookie 9:49 PM GMT on January 19, 2011    
Quoting JFLORIDA:
Also I think Some1Has2BtheRookie's answer was rather splendid in its reasoning and example. On several layers.


Thank you, JFLORIDA. I greatly appreciate that.
Member Since: August 24, 2010 Posts: 0 Comments: 4105
259. plywoodstatenative 9:50 PM GMT on January 19, 2011    
Quoting NEwxguy:
Keeper,I sure hope that comes to pass for February,we desperately need some relief,which for the foreseeable future we are still going to continue to get nailed up here.


You need the relief, we need the rain. That is as simple as it is, a lot of stuff here is turning brown, not good for South Florida.
Member Since: November 15, 2005 Posts: 16 Comments: 4147
260. caneswatch 9:51 PM GMT on January 19, 2011    
Finally got the internet back running at the house. Now, it's a little warm, about 10 degrees above normal here in S FL. Finally got rain again, and a decent amount from Monday afternoon to early this morning.
Member Since: October 8, 2008 Posts: 14 Comments: 4473
261. ColoradoBob1 9:52 PM GMT on January 19, 2011    
I noticed that the southern tip of Africa hasn't been mentioned in the thread .

Flooding in southern Africa claims over 50 lives

The forecast for all these places is for more rain .

Brisbane got 3 inches yesterday.

Flooding has returned to Sao Paulo
Member Since: August 13, 2010 Posts: 0 Comments: 159
262. NEwxguy 9:53 PM GMT on January 19, 2011    
Quoting KEEPEROFTHEGATE:
look at it this way NE there is only 60 days left of winter then its spring


well,if I wasn't depressed by this weather before,I am now.Thanks!!
Member Since: September 6, 2007 Posts: 816 Comments: 13132
263. KEEPEROFTHEGATE (Mod) 9:54 PM GMT on January 19, 2011    
Quoting caneswatch:
Finally got the internet back running at the house. Now, it's a little warm, about 10 degrees above normal here in S FL. Finally got rain again, and a decent amount from Monday afternoon to early this morning.
more rain to come with systems dropping down and crossing the gulf over fla till the end of the month if it plays out the way its showing



Member Since: July 15, 2006 Posts: 144 Comments: 40670
264. Some1Has2BtheRookie 9:59 PM GMT on January 19, 2011    
Quoting HIPPOCRITT:
I blasted my AC in my car with the windows down earlier. I hope I have reversed all this Global Warming mumbo jumbo talk :\


What? Don't back away on me now. I was just about to open my thesaurus!

Just kidding. Regardless of what you say, you do invoke thought. I appreciate that. Thanks.
Member Since: August 24, 2010 Posts: 0 Comments: 4105
265. ColoradoBob1 10:00 PM GMT on January 19, 2011    
266. Some1Has2BtheRookie 10:04 PM GMT on January 19, 2011    
Quoting oracle28:


Maybe sun growth is causing the global warming.


Yes it will, but over billions of years and not over the few centuries we have been discussing.
Member Since: August 24, 2010 Posts: 0 Comments: 4105
267. PrivateIdaho 10:09 PM GMT on January 19, 2011    
Quoting Some1Has2BtheRookie:


Idaho, I seldom agree with you, but I like your sense of humor. I'll give you 10 points!
Well here's something off-topic that you'll like.

Your tax dollars at work:

Link

Idaho computer geeks helped destroy uranium enrichment centrifuges in Iran....How funny is that?

Quoting oracle28:


I always dump my extra ice on the ground, just to slow the warming. I call it localized man-made global cooling.
But what if you used dry ice?
Member Since: August 29, 2010 Posts: 0 Comments: 5211
268. Some1Has2BtheRookie 10:12 PM GMT on January 19, 2011    
Quoting PrivateIdaho:
Well here's something off-topic that you'll like.

Your tax dollars at work:

Link

Idaho computer geeks helped destroy uranium enrichment centrifuges in Iran....How funny is that?

But what if you used dry ice?


Well, at least not all of our tax dollars are wasted.
Member Since: August 24, 2010 Posts: 0 Comments: 4105
269. RitaEvac 10:14 PM GMT on January 19, 2011    
Check out the hole opening up over western Alabama!!! on visible satellite. It's a conspiracy going on out there!!
Member Since: July 14, 2008 Posts: 1 Comments: 8912
270. RitaEvac 10:15 PM GMT on January 19, 2011    
A sun spot has burned off a perfect circumference layer of the clouds  lol
Member Since: July 14, 2008 Posts: 1 Comments: 8912
272. JupiterKen 10:18 PM GMT on January 19, 2011    
Weather Bolg?
Member Since: May 3, 2010 Posts: 0 Comments: 295
273. RitaEvac 10:19 PM GMT on January 19, 2011    
A hole to another dimension has formed.
Member Since: July 14, 2008 Posts: 1 Comments: 8912
278. Neapolitan 10:27 PM GMT on January 19, 2011    
Quoting JupiterKen:
Weather Bolg?

That's the second time you've asked that today. Here, try this link.
Member Since: November 8, 2009 Posts: 4 Comments: 11175
279. oracle28 10:31 PM GMT on January 19, 2011    
Quoting Some1Has2BtheRookie:


Yes it will, but over billions of years and not over the few centuries we have been discussing.


Really, what brings you to that conclusion.

I would bet that a 2 inch increase in the sun's diameter would heat things up by .1 C or whatever the consensus temp rise has been.

2-inches wider isn't much, especially right after the holidays
Member Since: July 25, 2008 Posts: 0 Comments: 584
280. oracle28 10:32 PM GMT on January 19, 2011    
Quoting PrivateIdaho:
Well here's something off-topic that you'll like.

Your tax dollars at work:

Link

Idaho computer geeks helped destroy uranium enrichment centrifuges in Iran....How funny is that?

But what if you used dry ice?


Dry ice would result in global drying, and I'm opposed to that.
Member Since: July 25, 2008 Posts: 0 Comments: 584
281. JupiterKen 10:33 PM GMT on January 19, 2011    
I have. Not much weather discussion there
Member Since: May 3, 2010 Posts: 0 Comments: 295
287. Some1Has2BtheRookie 10:43 PM GMT on January 19, 2011    
Quoting oracle28:


Really, what brings you to that conclusion.

I would bet that a 2 inch increase in the sun's diameter would heat things up by .1 C or whatever the consensus temp rise has been.


OK, I'll bite. The Sun's approximate diameter is now 857,492.2 miles. What happens when you add 2 inches to that diameter?
Member Since: August 24, 2010 Posts: 0 Comments: 4105
292. caneswatch 10:48 PM GMT on January 19, 2011    
Quoting KEEPEROFTHEGATE:
more rain to come with systems dropping down and crossing the gulf over fla till the end of the month if it plays out the way its showing





That's great news to hear. Speaking of storms, the storm that's expected to shoot to the NE dumped 2' of snow out in Breckenridge. Great for the snowboarders and skiers.
Member Since: October 8, 2008 Posts: 14 Comments: 4473
293. Some1Has2BtheRookie 10:49 PM GMT on January 19, 2011    
Quoting Surfcropper:


how many inches in a mile?


5,280'/mile
12"/foot
12 x 5280 = 63,360
63,360 Why?
Member Since: August 24, 2010 Posts: 0 Comments: 4105
296. Some1Has2BtheRookie 10:51 PM GMT on January 19, 2011    
Quoting KrippleCreekFerry:
I read that some experts say our increase in hot sauce usage is contributing to GW.


Hmmmmm. You would think it burn off the methane. LOL
Member Since: August 24, 2010 Posts: 0 Comments: 4105
298. Some1Has2BtheRookie 10:55 PM GMT on January 19, 2011    
I have enjoyed our discussions. I thank each and everyone of you.
L8R
Member Since: August 24, 2010 Posts: 0 Comments: 4105
300. KEEPEROFTHEGATE (Mod) 10:58 PM GMT on January 19, 2011    
return flow detected

Member Since: July 15, 2006 Posts: 144 Comments: 40670

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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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