radarman Posted June 4, 2013 Share Posted June 4, 2013 Niiiice I blew up the velocity one and made two small black lines. The radar was positioned to the NE just over 4km from the main vortex. The first line is the fold... their nyquist is about the same as ours ~85MPH. Then it wraps all the way back to zero (second black line) and then another 20 m/s on top. That's a sick 215-220 MPH reading probably just over 1000' AGL. Link to comment Share on other sites More sharing options...
radarman Posted June 4, 2013 Share Posted June 4, 2013 The satellite vortex folds on the outbound and wraps back another 20 or so m/s for a roughly 120-125 MPH measurement. The inbound on the other hand is not folded and only about 30MPH... However it's being heavily affected by the storm motion. A plot of SRV would be much more symmetric obviously. It's extremely difficult to estimate the forward motion of the satellite vortex from a single snapshot, but in this particular image the outbound velocities aren't in the 150 MPH range even factoring in the rotation. If it were advecting forward 150 MPH you'd expect outbounds on par with the main vortex and no hint of rotation in the base velocity (only in SRV). Granted the storm motion is not exactly along the radial so it will be an underestimate, but it's not tangential either. I'd read that to be about an EF0 moving SSE at ~50MPH. Link to comment Share on other sites More sharing options...
OceanStWx Posted June 4, 2013 Share Posted June 4, 2013 The satellite vortex folds on the outbound and wraps back another 20 or so m/s for a roughly 120-125 MPH measurement. The inbound on the other hand is not folded and only about 30MPH... However it's being heavily affected by the storm motion. A plot of SRV would be much more symmetric obviously. It's extremely difficult to estimate the forward motion of the satellite vortex from a single snapshot, but in this particular image the outbound velocities aren't in the 150 MPH range even factoring in the rotation. If it were advecting forward 150 MPH you'd expect outbounds on par with the main vortex and no hint of rotation in the base velocity (only in SRV). Granted the storm motion is not exactly along the radial so it will be an underestimate, but it's not tangential either. Nice analysis, I was trying to mentally come up with an estimate but failed. It gets hard to even wrap your head around sometimes, as that satellite is rotating itself, while translating with the storm motion, while rotating around the parent vortex cyclonically. It all depends on where this image was taken to determine whether this was at it's strongest, widest, etc. Still an impressive image. Link to comment Share on other sites More sharing options...
radarman Posted June 4, 2013 Share Posted June 4, 2013 Nice analysis, I was trying to mentally come up with an estimate but failed. It gets hard to even wrap your head around sometimes, as that satellite is rotating itself, while translating with the storm motion, while rotating around the parent vortex cyclonically. It all depends on where this image was taken to determine whether this was at it's strongest, widest, etc. Still an impressive image. I'll say, that's one of the most awesome radar images I've ever seen. Link to comment Share on other sites More sharing options...
OceanStWx Posted June 4, 2013 Share Posted June 4, 2013 Here is another great example of video. Hugely impressive dynamics going on in this video, really showing the large parent circulation (meso basically right on the ground) with these smaller cyclonic satellite tornadoes spinning up and dying. However, this is a chaser that is part of the growing trend of "extreme" video. This is so zoomed in that you miss satellites and structure that is going on outside the frame, and have no concept for depth of inflow and other important factors going on near the circulation. In fact in the YouTube comments they brag how it passed yards from them. Link to comment Share on other sites More sharing options...
tamarack Posted June 4, 2013 Share Posted June 4, 2013 Looks like CAR confirmer tornado in ME the other day. PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE CARIBOU ME 432 PM EDT MON JUN 3 2013 ...SUMMARY... THE NATIONAL WEATHER SERVICE IN CARIBOU ME HAS CONFIRMED A TORNADO 2 MILES NORTH OF THE TOWN OF EAGLE LAKE IN AROOSTOOK COUNTY MAINE ON 06/02/2013. THIS WAS A VERY SMALL AND BRIEF TORNADO WHICH WAS ACTUALLY ON THE LEADING EDGE OF A MICROBURST WHICH CAUSED MUCH MORE WIDESPREAD TREE DAMAGE FROM ALONG EAGLE LAKE, NORTHEASTWARD TOWARD CROSS LAKE. FOR MORE INFORMATION ON MICROSBURSTS GO TO WWW.SRH.WEATHER.GOV/JETSTREAM/TSTORMS/WIND.HTM (LOWER CASE). THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT WEATHER.GOV/CAR. The boldfaced words suggest possible significant damage to the forest on Public Lands' Eagle Lake Unit, which lies east and northeast of the tornado track. There's something about that 22,000-acre tract that seems to draw wind events. An extended (12-15 miles) straight line event in 2004 entered the township from the south and flattened 100+ acres in several separate patches (largest, and only one salvaged, was 60 ac) on a northeasterly course, then jumped across the east end of Eagle Lake to blow down another 10-12 acres on the north side. On Sept 30, 1986, a massive downburst crushed 600 acres of timber in a four mile strip up to half a mile wide, that ended with trees blown into the north end of Square Lake. (Half that area lies on the abutter to the east of the state lands.) The only other blowdowns of remotely close magnitude on state lands since I came to the agency in 1985 occurred from the July 4-5, 1999 dericho, which ripped through the western mts early on the 5th. That link in post #425 has to be the most incredible radar loop I've ever seen, and the video ranks way up there, too. Edit, re: the 2nd, "extreme" video: "If ignorance is bliss, 'tis folly to be wise." These guys were fools, and this type of action justs twists the knife when thinking of the three lost scientists. Link to comment Share on other sites More sharing options...
OceanStWx Posted June 4, 2013 Share Posted June 4, 2013 We'll have more information about Sunday coming this evening as well, regarding the significant areas of damage near Rangeley and points east. Link to comment Share on other sites More sharing options...
joey2002 Posted June 4, 2013 Share Posted June 4, 2013 Eric Fisher @EricFisherTWC 1h Wow...like a nightmarish game of Frogger. Animation of storm spotters vs. the El Reno #tornado: http://bit.ly/ZrC3lO Link to comment Share on other sites More sharing options...
Ginx snewx Posted June 4, 2013 Share Posted June 4, 2013 god these guys made some bad decisions. How do they figure those vortices rotated around at 150 mph, on video does not seem it http://www.youtube.com/watch?v=vw3YYawGZTw Link to comment Share on other sites More sharing options...
CoastalWx Posted June 4, 2013 Share Posted June 4, 2013 god these guys made some bad decisions. How do they figure those vortices rotated around at 150 mph, on video does not seem it http://www.youtube.com/watch?v=vw3YYawGZTw How about the guy walking around at the end? Link to comment Share on other sites More sharing options...
Ginx snewx Posted June 4, 2013 Share Posted June 4, 2013 How about the guy walking around at the end? i know WTF, check out this incredible structure and vortices from utube. You can see reverse vortices, horizontal vortices all kinds of satellite tornadoes. I believe this is the best one that fully captures the beast. These guys are lucky. I read where trucks at full pedal power trying to get away could only muster 35-40 MPH due to inflow. http://www.youtube.com/watch?v=kk7LJvjYV9s Link to comment Share on other sites More sharing options...
Christina311 Posted June 16, 2013 Share Posted June 16, 2013 I chased the storm all afternoon and got a bunch of pictures and a few short videos. I'm trying to figure out how to add them in the gallery on this site. Here's one for now. Chicopee MA at 6:00. I have others in a Facebook album that's set to public for viewing: https://www.facebook.com/media/set/?set=a.10152898886030220.1073741824.799395219&type=1&l=ca675bccbd And here's a video from the same time/place as the picture above. I wish I had kept recording but the lightening was getting too close and I had to get out of there. https://www.facebook.com/photo.php?v=10152898954230220 Link to comment Share on other sites More sharing options...
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