tag:blogger.com,1999:blog-7478606652950905956.post391153165306162245..comments2024-03-28T03:08:44.068-07:00Comments on Cliff Mass Weather Blog: Hook Echo on the Washington Coast?Cliff Mass Weather Bloghttp://www.blogger.com/profile/13948649423540350788noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7478606652950905956.post-18059376741714159852012-03-25T08:30:08.214-07:002012-03-25T08:30:08.214-07:0040 years ago, as a kid in the deep south, the term...40 years ago, as a kid in the deep south, the term Hook Echo was one of the scariest things we knew. When you heard that from the radio or an adult, you ran for cover. I don't think i've heard the term in decades, but when i opened the blog this morning and saw Hook Echo, i froze!mrk.https://www.blogger.com/profile/03666527097680790478noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-54005966591542996742012-03-24T20:47:09.656-07:002012-03-24T20:47:09.656-07:00It is Saturday night, almost 9pm, and I just learn...It is Saturday night, almost 9pm, and I just learned something really neat about weather and weather detection. I will never forget the term "hook echo", and what it might mean, or, upon closer investigation, not mean.<br /><br />Thank you, Professor Mass!dalehttps://www.blogger.com/profile/18020114577391932096noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-9219867384223856712012-03-24T12:04:48.602-07:002012-03-24T12:04:48.602-07:00"and shouldnt you be looking at SRM not Base ..."and shouldnt you be looking at SRM not Base vel?"<br /><br />You can see there is no rotation in the base velocity plot. <br /><br />Look at the position of the "hook" feature. It's all the same color all through that area so it's all the same velocity. If there was rotation you'd see different colors there corresponding to the radial component of the rotation seen by the radar.<br /><br />Storm relative motion (SRM) subtracts the storm motion vector from the wind radial velocity vector seen by the radar. It works well when the system correctly figures out how the storm is moving. Then the velocity offsetmakes it easier to find the cold/warm color couplet at a glance. Useful in the mid-West (when you spend a lot of time looking for hooks) but not so much in this case. <br /><br />SRM plots are a convenience not a requirement.Kevin Purcellhttps://www.blogger.com/profile/18157202870194603923noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-69299504656360501862012-03-24T10:48:09.381-07:002012-03-24T10:48:09.381-07:00what about low topped supercells? and shouldnt you...what about low topped supercells? and shouldnt you be looking at SRM not Base vel?glenhttps://www.blogger.com/profile/15436466037467657683noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-66032512740155981002012-03-24T10:33:47.717-07:002012-03-24T10:33:47.717-07:00If rotation wasn't showing up in any velocity,...If rotation wasn't showing up in any velocity, it likely wasn't rotating at all. My guess is that if you looped it was probably just a shower moving into another shower or something like that. No need to pinwheel - it's probably just the way one scan looked.Rob Dalehttps://www.blogger.com/profile/00132449143586969553noreply@blogger.com