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.
Map showing the projected path of Hurricane Frances (2004). Notice that the path becomes wider because there is more uncertainty about where the storm will go further in the future.
Click on image for full size
Courtesy of NOAA

When and Where Will a Hurricane Form?

In some years there are many hurricanes. Other years there are only a few. Each year, scientists make predictions about what they think the hurricane season will be like. They can’t say for sure how many hurricanes there will be, but their predictions let people know what to expect.

To make the predictions, they look at how climate is affecting hurricanes that year. For example, climate events such as El Niño can affect the number of hurricanes. Hurricanes are affected by other climate signals that last for decades too. Scientists also examine the temperature of the ocean water because warmer waters may lead to stronger storms.

Once a hurricane forms other scientists make predictions about where the storm will travel. The path of a hurricane depends on weather. Scientists use weather models that track areas of high and low pressure and other weather factors to predict the path of a storm.

Scientists also watch a hurricane to know if it is getting stronger or larger. When it is far out to sea, they watch the storm using satellites. Special planes can also be flown into a hurricane to take measurements. Once it is close to land, Doppler radar and observations are used to monitor the storm.

Last modified October 5, 2009 by Lisa Gardiner.

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