Archive for the ‘Ozone Watch’ Category

Ozone – Good & Bad
March 25, 2011



A good way to remember this is ozone is GOOD up high, BAD nearby. 



Ground level ozone can irritate the lungs, especially for those with suffer from emphysema and asthma.  Upper level ozone is good because it blocks out harmful UV rays.  



We are now in ozone season, and days with warm temperatures, sunny skies and light winds will trigger the formation of ozone on the ground. 


To view past weather quiz answers click here:

Past Weather Quiz Answers


Ozone – What It Means To You
August 2, 2010

The last two days we’ve had ozone problems in the afternoon, but many of us don’t know what that means.  Ozone (O3) is a highly reactive gas composed of three oxygen atoms.  When the weather is expected to be sunny and hot/warm with light winds, we get ozone watches issued for Houston, Galveston and Brazoria counties.  Typically, we’ll have air pollution problems because elevated concentrations of ozone act as a lung irritant. Individuals with chronic lung disease, such as asthma and emphysema, as well as the elderly and young children, are particularly sensitive to ozone and should attempt to avoid exposure by minimizing time outside during the midday to early evening hours, or stay indoors in an air-conditioned room.

Keep in mind that most ozone problems are for sensitive groups, not the general public. This is the orange area on the air quality index. The city of Houston will issue air quality warnings when the air quality deteriorates. Here is what those warnings look like:

Notice on this particular day last year there were two red warnings for Pasadena and La Porte and the air quality is unhealthy for all of us.  If you want to be added to the air quality e-mail list when watches and warnings are issued, click here: