nwohweather Posted May 21 Share Posted May 21 Absolute monster on the radar. One of the strongest signatures I've ever seen within a line Link to comment Share on other sites More sharing options...
canderson Posted May 21 Share Posted May 21 Reed Timmer just got this video. It shredded a windmill. I recorded off my phone but don’t know where to upload since it’s too big for the board upload system . Those vortexes! Link to comment Share on other sites More sharing options...
WxWatcher007 Posted May 21 Share Posted May 21 8 minutes ago, canderson said: Reed Timmer just got this video. It shredded a windmill. I recorded off my phone but don’t know where to upload since it’s too big for the board upload system . Those vortexes! 4 Link to comment Share on other sites More sharing options...
andyhb Posted May 21 Share Posted May 21 Catastrophic damage in Greenfield IA. TDS went up over 40,000 feet. Link to comment Share on other sites More sharing options...
zinski1990 Posted May 21 Share Posted May 21 Greenfield probably got wiped off the map 1 Link to comment Share on other sites More sharing options...
StormySquares Posted May 21 Share Posted May 21 Forgive me if I'm wrong, but didn't it look like the velocity signature weakened some as it went into Greenfield? Link to comment Share on other sites More sharing options...
bowtie` Posted May 21 Share Posted May 21 7 hours ago, sbnwx85 said: Storms yesterday did some impressive damage in Laporte County. https://x.com/nwsiwx/status/1792727617529135390?s=46 Electrical transmission looks horrible, but the wheat looks great! 1 Link to comment Share on other sites More sharing options...
Powerball Posted May 21 Share Posted May 21 3 minutes ago, StormySquares said: Forgive me if I'm wrong, but didn't it look like the velocity signature weakened some as it went into Greenfield? Even if it did, it was still likely too little too late to spare Greenfield from extensive damage. Link to comment Share on other sites More sharing options...
andyhb Posted May 21 Share Posted May 21 1 6 Link to comment Share on other sites More sharing options...
bowtie` Posted May 21 Share Posted May 21 Always scary to watch the atmosphere un-zip, like it did from Missouri to Kansas and Oklahoma. Link to comment Share on other sites More sharing options...
StormySquares Posted May 21 Share Posted May 21 I found the location of the photo Andy posted. 41°18'14.9"N 94°27'11.7"W 1 Link to comment Share on other sites More sharing options...
Chinook Posted May 21 Share Posted May 21 this was a tornado that may have been brief (might mentioned as Greenbush, a small town) Link to comment Share on other sites More sharing options...
Chinook Posted May 21 Share Posted May 21 new tornado by Cambridge, north of Des Moines. (radar might have seen the initial circulation right next to the radar a few minutes ago) Link to comment Share on other sites More sharing options...
mob1 Posted May 21 Share Posted May 21 1 minute ago, Chinook said: new tornado by Cambridge, north of Des Moines. (radar might have seen the initial circulation right next to the radar a few minutes ago) PDS warning on that one but it's hard to tell given its proximity to the radar site. Link to comment Share on other sites More sharing options...
Chinook Posted May 21 Share Posted May 21 tornado tracked about 17-18 miles in 12 minutes Link to comment Share on other sites More sharing options...
Chinook Posted May 21 Share Posted May 21 It was pretty close to the radar, and I think I found that the base velocity was 140mph on the south side of the tornado, maybe the max base velocity that can be measured? Link to comment Share on other sites More sharing options...
mob1 Posted May 21 Share Posted May 21 3 minutes ago, Chinook said: It was pretty close to the radar, and I think I found that the base velocity was 140mph on the south side of the tornado, maybe the max base velocity that can be measured? https://x.com/crickbritt/status/1793039817858588974 Was definitely a big one Link to comment Share on other sites More sharing options...
thunderbird12 Posted May 21 Share Posted May 21 5 minutes ago, Chinook said: It was pretty close to the radar, and I think I found that the base velocity was 140mph on the south side of the tornado, maybe the max base velocity that can be measured? Looking back, my GR2 had a couple base-velocity pixels of 160 kt (184 mph) at around 700 feet above ground when the tornado was south of Cambridge, IA. Even discounting that, there were several scans where it had 120-140 kt base velocity at multiple tilts, which is impressive. Looks like that particular tornado has finally weakened, thankfully. 1 Link to comment Share on other sites More sharing options...
mob1 Posted May 21 Share Posted May 21 https://x.com/Tornado_Steejo/status/1793040922319495301 This is the tornado that went on to hit Greenfield. Link to comment Share on other sites More sharing options...
KoalaBeer Posted May 21 Share Posted May 21 Greenfield drone footage. No matter how many times I see it, it never ceases to amaze me how one home can be slabbed and houses a block away are relatively unscathed. Really high end damage, will have to see what the survey crews find. 3 Link to comment Share on other sites More sharing options...
Brian D Posted May 21 Share Posted May 21 13 minutes ago, KoalaBeer said: Greenfield drone footage. No matter how many times I see it, it never ceases to amaze me how one home can be slabbed and houses a block away are relatively unscathed. Really high end damage, will have to see what the survey crews find. That looks like EF3 to 4 damage along the path. Brutal. Hope everyone made shelter. Link to comment Share on other sites More sharing options...
Chinook Posted May 21 Share Posted May 21 24 minutes ago, thunderbird12 said: Looking back, my GR2 had a couple base-velocity pixels of 160 kt (184 mph) at around 700 feet above ground when the tornado was south of Cambridge, IA. Even discounting that, there were several scans where it had 120-140 kt base velocity at multiple tilts, which is impressive. Looks like that particular tornado has finally weakened, thankfully. maybe my system couldn't display a number over 141mph Link to comment Share on other sites More sharing options...
KoalaBeer Posted May 21 Share Posted May 21 7 minutes ago, Brian D said: That looks like EF3 to 4 damage along the path. Brutal. Hope everyone made shelter. Ya I don’t necessarily like tossing out numbers based of photos etc, but I’d bet my left nut this will be rated EF4+ Saw a few photos of asphalt ripped from the road as well. Link to comment Share on other sites More sharing options...
WxSynopsisDavid Posted May 22 Share Posted May 22 Greenfield, IA tornado will be “at least EF4”. Pretty significant damage indicators being found. Of significant, the asphalt scouring and how the debris looks granulated. Typically these are trademarks of upper echelon high end tornadoes, along with debris lofting 40k feet into the atmosphere. I would venture to say preliminary rated 190mph or 200mph until engineers get on site to conduct their analysis. Engineers such as Tim Marshall. Link to comment Share on other sites More sharing options...
Chicago Storm Posted May 22 Share Posted May 22 2 minutes ago, WxSynopsisDavid said: Engineers such as Tim Marshall. may very well only be an EF-2 in that case. 1 2 Link to comment Share on other sites More sharing options...
WxSynopsisDavid Posted May 22 Share Posted May 22 3 minutes ago, Chicago Storm said: may very well only be an EF-2 in that case. Numerous slabs wiped clean have bent anchor bolts. Tim has rated past tornadoes EF5 (ex: the 2011 EF5’s) off of this sole indicator. That and/or missing anchor bolts, but there’s no reports of any missing anchor bolts, as of yet. Link to comment Share on other sites More sharing options...
zinski1990 Posted May 22 Share Posted May 22 16 minutes ago, Chicago Storm said: may very well only be an EF-2 in that case. we all know this will be ef2 cause nws refuses to ever rate an ef5 ever agin Link to comment Share on other sites More sharing options...
Chinook Posted May 22 Share Posted May 22 confirmed tornado near Davenport Quote The National Weather Service in the Quad Cities has issued a * Tornado Warning for... Southeastern Cedar County in east central Iowa... Northwestern Scott County in east central Iowa... North central Muscatine County in east central Iowa... * Until 800 PM CDT. * At 738 PM CDT, a confirmed large and extremely dangerous tornado was located near Atalissa, or 8 miles north of Muscatine, moving northeast at 65 mph. This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW! HAZARD...Damaging tornado. SOURCE...Weather spotters confirmed tornado. Link to comment Share on other sites More sharing options...
shaggy Posted May 22 Share Posted May 22 DOW recorded winds over 200mph with the greenfield tornado Link to comment Share on other sites More sharing options...
WxSynopsisDavid Posted May 22 Share Posted May 22 Just now, shaggy said: DOW recorded winds over 200mph with the greenfield tornado Reading was 215mph and 600ft off the surface. So plausible to say 190-200mph. 1 Link to comment Share on other sites More sharing options...
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