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<title> APOD: 2017 August 26 - Hurricane Harvey Strengthens    
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<h1> Astronomy Picture of the Day </h1>
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<a href="archivepix.html">Discover the cosmos!</a>
Each day a different image or photograph of our fascinating universe is
featured, along with a brief explanation written by a professional astronomer.
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2017 August 26 
<br> 
<iframe width="960" height="540" src="https://www.youtube.com/embed/vX4cf19h7iA?rel=0" frameborder="0" allowfullscreen></iframe>
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<b> Hurricane Harvey Strengthens </b> <br> 
<b> Video Credit: </b> 
<a href="https://goes.gsfc.nasa.gov/">NASA-NOAA GOES Project</a>
</center> <p> 

<b> Explanation: </b> 
A large and dangerous hurricane has developed in the Gulf of Mexico. 

The <a href="https://www.youtube.com/watch?v=vX4cf19h7iA">featured time-lapse video</a> 
shows 
<a href="https://en.wikipedia.org/wiki/Hurricane_Harvey_(2017)">Hurricane Harvey</a> 
growing to 
<a href="http://www.nhc.noaa.gov/aboutsshws.php">Category 4</a> 
strength over the past few days, as captured by 
<a href="https://www.nasa.gov"/>NASA</a> and
<a href="http://www.noaa.gov/">NOAA</a>'s
<a href="https://en.wikipedia.org/wiki/Geostationary_Operational_Environmental_Satellite"
>GOES</a>-East satellite.

Starting as a slight dip in 
<a href="https://en.wikipedia.org/wiki/Atmospheric_pressure">air pressure</a>, 
<a href="http://www.aoml.noaa.gov/hrd/tcfaq/tcfaqHED.html">hurricanes</a> 
swell into expansive spiraling 
<a href="ap161009.html">storm systems</a>, complete with 
<a href="https://www.youtube.com/watch?v=rKUipxR3bDc">high</a> 
<a href="ap161010.html">winds</a> and driving rain. 

Hurricanes are 
<a href="https://spaceplace.nasa.gov/hurricanes/en/">powered by</a> evaporating ocean water, 
and so typically 
<a href="https://www.youtube.com/watch?v=sPW7uzGbFZ4">gain strength</a> 
over warm water and lose strength over land. 

Much remains unknown about hurricanes and 
<a href="ap040406.html">cyclones</a>, including details of 
<a href="https://eo.ucar.edu/kids/dangerwx/hurricane3.htm">how they are formed</a> 
and the exact path they will take.

<a href="https://www.nasa.gov/feature/goddard/2017/harvey-atlantic-ocean"
>Hurricane Harvey</a>, accompanied by a dangerous 
<a href="https://en.wikipedia.org/wiki/Storm_surge">storm surge</a>, 
made landfall late yesterday in 
<a href="https://en.wikipedia.org/wiki/Texas">Texas</a>.


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<b> Tomorrow's picture: </b><a href="ap170827.html">heart chemicals</a>

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<b> Authors & editors: </b>
<a href="http://www.phy.mtu.edu/faculty/Nemiroff.html">Robert Nemiroff</a>
(<a href="http://www.phy.mtu.edu/">MTU</a>) &
<a href="https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html"
>Jerry Bonnell</a> (<a href="http://www.astro.umd.edu/">UMCP</a>)<br>
<b>NASA Official: </b> Phillip Newman
<a href="lib/about_apod.html#srapply">Specific rights apply</a>.<br>
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<a href="https://www.nasa.gov/centers/goddard/">GSFC</a>
<br><b>&</b> <a href="http://www.mtu.edu/">Michigan Tech. U.</a><br>
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