Current Events

  • Atmospheric CO2 Level Tops 400 ppm
    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm rep...Read more

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    Atmospheric CO2 Level Tops 400 ppm

    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well. The level of atmospheric greenhouse gases continues to increase, now over 120 ppm since the Industrial Revolution began. For more on the Keeling Curve, see http://keelingcurve.ucsd.edu/. Find out more about greenhouse gases and warming.
  • Massive Tornado Outbreak on Tornado Alley
    The week of May 19 brings dozens of tornadoes to Tornado Alley in the states of Oklahoma, Kansas, Io...Read more

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    Massive Tornado Outbreak on Tornado Alley

    The week of May 19 brings dozens of tornadoes to Tornado Alley in the states of Oklahoma, Kansas, Iowa, Illinois and Missouri. On May 20th, a massive tornado struck Moore, Oklahoma, devastating communities - destroying over 100 homes and hitting two elementary schools and a hospital - with many casualties and deaths. Our thoughts are with our friends and colleagues suffering from these storms. For more on the May 20th storms, see the NOAA Storm Prediction Center Storm Report.
  • Kansas Legislator Proposes Bill to Outlaw Sustainability Education
    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of ...Read more

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    Kansas Legislator Proposes Bill to Outlaw Sustainability Education

    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of sustainability. Here is a link to the one-page bill: http://www.kslegislature.org/li/b2013_14/measures/documents/hb2366_00_0000.pdf. See report on Bloomberg News.
An image of Hurricane Sandy taken by the GOES-13 satellite on October 28. This category 1 hurricane was huge, spanning a horizontal distance of about one-third the US continental landmass. The storm came onshore in New Jersey, and gradually moved northeast. The storm disrupted the lives of tens of millions in the eastern US, doing billions of dollars in damage, resulting in over 30 deaths. Visit the National Hurricane Center's webpage on Hurricane Sandy for details.
Click on image for full size
Image courtesy of NASA

Hurricanes (also known as Tropical Cyclones)

Hurricanes form in the tropics over warm ocean water. The storms die down when they move over land or out of the tropics. At the center of the rotating storm is a small area of calm weather and clear skies called the eye.

Hurricane damage is often caused by flooding from storm surge. Hurricanes have strong waves and wind that cause damage too. And there is often tons of rain. Not all storms are the same. Large and strong storms cause much more damage than small storms. The Saffir-Simpson Hurricane Scale is one way to describe the size of a hurricane.

As a hurricane moves, scientists try to figure out where it will go. They watch hurricanes with weather satellites and use computer models to predict its path. Each hurricane is given a name. Calling the storm by its name helps people spread the word that a storm was on its way.

Hurricanes usually happen at a particular time of year called hurricane season. The timing of hurricane season is different in different regions of the world. In the North Atlantic, hurricane season is from June 1st to November 30th each year.

Last modified February 17, 2009 by Lisa Gardiner.

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