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  #1  
Old 04-04-2009, 05:32 PM
timaahhh timaahhh is offline
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Default Is this a Hook Echo

Question, is this the "hook echo" in a storm that shows rotation? I'm look at the image south east south-east of Holdrege about equal distance between Holdrege and hasting but further south of holdrege (most clear to me in the second and third images). The type of radar image is indicated in the title bar in the top left hand side of the image

These were screen shots from noaa.gov at around 3:40 pm CST

*No Tornado warnings issued yet today these screen shots were all taken about an hour ago*

http://i674.photobucket.com/albums/v...rmRelativ1.jpg

http://i674.photobucket.com/albums/v...oStormRel1.jpg

http://i674.photobucket.com/albums/v...positeRel1.jpg

http://i674.photobucket.com/albums/v...oBasicRel1.jpg

If this isn't a hook echo or the beginning of one, is it at least something to look for? Each of the images identify what type of radar image it is in the top left corner,(the title bar).

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Old 04-04-2009, 05:38 PM
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looks like a hook echo to me
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  #3  
Old 04-04-2009, 07:51 PM
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It does not appear to be a hook echo. There is no couplet in the velocity pics which would indicate strong enough rotation to form a hook. Hooks appear on radar when the rain is wrapped around a center of moderate to strong rotation. The velocity pics dont indicate strong rotation.
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Old 04-04-2009, 08:24 PM
timaahhh timaahhh is offline
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Thanks, could you show me an image of what a hook echo look like on base reflectivity radar? What does strong rotation look like on velocity radar? Or could you point me in the right direction so I could find out that information myself? I have not gone to a Skywarn Class this year, I went to an basic spotter class last year but I don't remember what to look for in radar.
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Old 04-04-2009, 09:33 PM
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I know we have a thread around here somewhere that had excellent examples and links pertaining to your question but I can't seem to find it. When I do, I'll post it in this thread.

In the meantime, the Oklahoma Climatological Survey has an excellent guide on how to read and interpret radar data: http://okfirst.mesonet.org/train/nids/BREFguide.html

The NWS's Jetstream program also gives a great tutorial on understanding radar images as well: http://www.srh.noaa.gov/srh/jetstrea...idgeimages.htm

Hope this helps and if you have any questions, please feel free to ask. ;o)
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Old 04-04-2009, 10:08 PM
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This thread has a few hooks:

http://www.skywarnonline.com/forums/...ight=hook+echo
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Old 04-05-2009, 01:53 AM
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Quote:
Originally Posted by timaahhh View Post
Thanks, could you show me an image of what a hook echo look like on base reflectivity radar? What does strong rotation look like on velocity radar? Or could you point me in the right direction so I could find out that information myself? I have not gone to a Skywarn Class this year, I went to an basic spotter class last year but I don't remember what to look for in radar.
or just look at my avitar.......
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Old 04-05-2009, 10:28 AM
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Follow this link http://www.srh.weather.gov/srh/jetstream/matrix.htm, Go To Dopplar Radar. Start at introduction and go to the end. You should learn a lot of basic info about interpreting Dopplar Radar.I suggest reading all info and clicking and reading everything related. Most important. Keep reading it and reviewing. You should be able to spot things in no time. Hope this helps.
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Old 04-05-2009, 10:31 AM
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Whoops, Sorry Road Runner. I must have scrolled too fast and missed you putting the same link. Sorry.
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Old 04-05-2009, 11:57 AM
timaahhh timaahhh is offline
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Excellent! I will look over these links.
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