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Archive for the ‘El Niño impact’ Category

La Niña Strengthening

Posted by feww on September 19, 2010

La Niña Conditions Continue to Strengthen Across the Equatorial Pacific Ocean.


Above map shows a 10-day average of sea-surface height and was acquired by the Ocean Surface Topography Mission/Jason-2 satellite on September 6, 2010. Higher water surface areas signifying warmer temperatures are shades of red-brown, and areas of lower water surface (cooler) are blue. White areas are normal condition.  “The El Niño weakens the westward trade winds that normally blow over the eastern tropical Pacific Ocean. Those winds keep eastern Pacific waters cool and concentrate warm waters in the western Pacific. A weakening of trade winds enables warm waters to gradually spread eastward, heating up the central Pacific. La Niña typically follows El Niño, and causes essentially the opposite conditions. La Niña strengthens the trade winds, spreading cool water from the South American coast to the central Pacific. This see-saw pattern of El Niño and La Niña can drive large-scale weather changes, especially in the tropics.” Full caption here… Source: NASA E/O. Click image to enlarge. Download large image (1 MB, PNG).

Sea Surface Temperatures


50 KM Global Analysis – updated weekly.

Current Conditions


Source: NWS/CPC/NOAA

Current SST Anomalies

SST Anomalies During El Niño

Current SST Anomalies
Above image shows SST Anomalies during the 2009 El
Niño episode, saved on July 27, 2009 and included for comparison.

Related Links:

Posted in El Niño, El Niño conditions, El Niño episode, El Niño impact, La Niña, La Niña episode | Tagged: , , , | Leave a Comment »

Peru Mudslide: 30 killed, 54 injured, 25 missing

Posted by feww on April 3, 2010

Serial No  1,530. If any posts are blocked in your country, please drop us a line.

A giant avalanche of mud and rocks buries a village in NE Peru, killing at least 30 people, injuring 54 and leaving 25 others missing.

“As of 12:00pm [17:00UTC, April 2, 2010] the death toll stands at 30 people,” Civil Defense chief of the Huanuco region, Hipolito Cruchaga, announced.

Although he put the number of missing at about 25, some local reports have suggested “hundreds of people” may be missing in the village of Ambo.


Homes are submerged in earth after a landslide in the Porvenir area of Huanuco, Peru, Friday, April 2, 2010. Regional officials say heavy rains in northeastern Peru caused landslides that killed at least 25 people, injured 50 and another 25 people are missing. (AP Photo). Image may be subject to copyright.

“An entire village, some 400 people, has completely vanished,” Jorge Espinoza, a senior official in the Huanuco region, had earlier told N television.

“Some will be saved, but it appears the majority were buried,” he said.

“The bodies of some victims were plucked from the swollen Huallaga River downstream from the village of Ambo, while others had to be dug out of the mud, local media reported.” AFP said.

A photo of an earlier mudslide released by Peruvian Civil Defense.

The mudslide was triggered by heavy rains that caused a lake higher up a mountain to overflow into a ravine, officials were reported as saying.

Another mudslide claimed 5 lives near the town of Cancejos on Thursday, officials said.

The disasters came barely hours after the government announced Machu Picchu had been reopened following the deadly floods that had forced the closure of Peru’s Inca ruins in January.

On March 9, Fire-Earth Forecast:

More extremes of weather could affect western, northwestern and northern regions of  South America throughout the spring 2010, possibly extending into the summer.

Related  Links:

More AP photos: Click here

Posted in El Niño impact, Landslide, mud avalanche, mudslide | Tagged: , , , , , | Leave a Comment »

El Niño Weekly Update [8 February 2010]

Posted by feww on February 10, 2010

ENSO Cycle: Recent Evolution, Current Status and Predictions

El Niño Weekly UPDATE prepared by Climate Prediction Center / NCEP –  8 February 2010

The latest weekly SST departures are:

  • Niño 4   ~  1.1ºC
  • Niño 3.4  ~  1.2ºC
  • Niño 3 ~ 0.6ºC
  • Niño 1+2 ~ 0.0ºC


El Niño Map. [SOURCE: NOAA/ Climate Prediction Center / NCEP]

Global SST Departures (°C)
During the last four weeks, equatorial SSTs were above-average across the central and eastern Pacific, Indian, and Atlantic Oceans.

Weekly SST Departures (ºC) for the Last Four Weeks

  • During the last four weeks, positive SST anomalies have weakened across the eastern half of the equatorial Pacific Ocean.
  • During the last 30 days, equatorial SST anomalies have decreased across the east-central and eastern Pacific.

Click images to enlarge


From December to early January, strong mid-latitude westerlies (East Asian and Atlantic jets) were accompanied by troughs over the North Pacific and North America. The troughs contributed to below-average temperatures across portions of the U.S. and Canada. At higher latitudes, strong ridging led to above-average temperatures across Alaska and northern Canada. Since mid January, the East Asian jet has extended farther east and a trough has become established over the eastern Pacific. Overmuch of N. America, strong ridging over Canada has contributed to above-average temperatures across Canada and portions of the contiguous U.S. This recent pattern is typical of El Niño.

SST Outlook: NCEP CFS Forecast Issued 31 January 2010
The NCEP CFS predicts El Niño will last through the Northern Hemisphere summer 2010.

Summary

  • El Niño is present across the equatorial Pacific Ocean.
  • Sea surface temperatures (SST) are 1.0ºC-2.5ºC above-average across much of the central and east-central equatorial Pacific.
  • Based on current observations and dynamical model forecasts, El Niño is expected to continue at least into the Northern Hemisphere spring 2010.

Unless otherwise stated, information and images on this page are sourced from Climate Prediction Center/NCEP/NOAA. Edited by FEWW

Related Links:

El Niño Updates – Last 4 Weeks:

  • El Niño [Main Page, Links to Weekly Updates Archive]

.

Posted in Climate Prediction, El Niño, El Niño 2010, El Niño conditions, El Niño impact, El Niño latest news, El Niño update, El Niño update 2010, El Niño weekly report | Tagged: , , , , , , , | 5 Comments »

El Niño Weekly Update [25 Jan 2010]

Posted by feww on January 26, 2010

ENSO Cycle: Recent Evolution, Current Status and Predictions

El Niño Weekly UPDATE prepared by Climate Prediction Center / NCEP –  25 January 2010

The latest weekly SST departures are:

  • Niño 4   ~  1.4ºC
  • Niño 3.4  ~  1.4ºC
  • Niño 3 ~ 0.8ºC
  • Niño 1+2 ~ 0.1ºC


El Niño Map. [SOURCE: NOAA/ Climate Prediction Center / NCEP]

Weekly SST Departures (ºC) for the Last Four Weeks

  • During the last four weeks, positive SST anomalies have weakened across the eastern half of the equatorial Pacific Ocean.
  • During the last 30 days, equatorial SST anomalies have decreased across the east-central and eastern Pacific.

SST Departures (°C) in the Tropical Pacific During the Last 4 Weeks


During the last 4-weeks, equatorial SSTs were more than 2.0°C above average between 170°W and 145°W.
Click image to enlarge.

Global SST Departures (°C)


During the last four weeks, equatorial SSTs were above-average across the Pacific, Indian, and eastern Atlantic Oceans. Also, above-average SSTs covered large areas of the Northern Hemisphere subtropics.


Click image to enlarge.


Atmospheric Circulation over the North Pacific & North America During the Last 60 Days

From late November to early January, strong mid-latitude westerlies(East Asian and Atlantic jets) were accompanied by troughs over the North Pacific and North America. The troughs contributed to below-average temperatures across the U.S. and southern Canada. At higher latitudes, strong ridging led to above-average temperatures across Alaska and northern Canada. Since early January, the East Asian jet has extended farther east and a trough has strengthened over the eastern Pacific. Over much of N. America, strong ridging has contributed to above-average temperatures across Canada and the northern and western U.S. Troughs and below-average temperatures have prevailed over the southeastern U.S. This recent pattern is typical of ElNiño.


Unless otherwise stated, information and images on this page are sourced from Climate Prediction Center/NCEP/NOAA. Edited by FEWW

For additional information, previous entries and diagrams see links below:

Summary:

  • El Niño is present across the equatorial Pacific Ocean.
  • Sea surface temperatures (SST) are 1.0ºC-3.0ºC above-average across much of the central and east-central equatorial Pacific.
  • Based on current observations and dynamical model forecasts, El Niño is expected to continue at least into the Northern Hemisphere spring 2010.

Related Links:

El Niño Updates:


Posted in El Niño 2010, El Niño impact, Oceanic Niño Index, SST anomalies, Tropical Pacific SST | Tagged: , , , , | 6 Comments »