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Chicago Storm

August 10 Severe Weather

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23 hours ago, hlcater said:

 

 

You're gonna want to watch these 3 videos. They are the most impressive out of any of the video I've seen so far and are easily on par with a significant, perhaps major, hurricane. MANY gusts over 100mph and the sustained winds are the highest I've seen out of any video.

Extremely impressive vids.  The aftermath videos showing huge amounts of tree debris in front of literally every residence is amazing as well.  

These vids were shot on Pine Wood Drive NE in northern Cedar Rapids, pretty close to Hiawatha.  The church losing it's roof is River of Life Church.

dfd.jpg

Church viewed from the northwest side.

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10 minutes ago, hlcater said:

uhhhh 25mb/7min is pretty insane...

Whoa, that is pretty cool.  Probably on the order of what you would see in some hurricanes as the eyewall moves in.  

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Just now, Hoosier said:

Whoa, that is pretty cool.  Probably on the order of what you would see in some hurricanes as the eyewall moves in.  

I checked and it's actually way, way greater. For instance, Josh's censors in Michael at Panama City peaked at ~1.5mb/min. This is 3.0-3.5mb/min, obviously. I'm interested in the context of a reading like that relative to other MCVs/Derechoes so I've been looking for comparable data, particularly BAMEX.

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1 minute ago, hlcater said:

I checked and it's actually way, way greater. For instance, Josh's censors in Michael at Panama City peaked at ~1.5mb/min. This is 3.0-3.5mb/min, obviously. I'm interested in the context of a reading like that relative to other MCVs/Derechoes so I've been looking for comparable data, particularly BAMEX.

Interesting.  Would've thought that high end hurricanes had a faster drop than that.  

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Just now, Hoosier said:

Interesting.  Would've thought that high end hurricanes had a faster drop than that.  

As did I, my guess is that due to the scale of the MCV feature, the average gradient generated by an MCV w/strong RIJ is somewhere in between a hurricane and a tornado.

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8 minutes ago, hlcater said:

As did I, my guess is that due to the scale of the MCV feature, the average gradient generated by an MCV w/strong RIJ is somewhere in between a hurricane and a tornado.

Out of curiosity I went back and checked the obs from Laura in Lake Charles.  It may not have captured the maximum pressure drop rate there since the sensor failed at 132 mph in the eyewall, but they dropped 23 mb in 1 hour.  This was 25 mb in about one tenth of the time.    

Maybe some of the most intense hurricanes have a quicker drop rate than what Josh experienced, but this derecho was something else.  We know about the extreme pressure drops that can occur in tornadoes (even within seconds) but I never thought an MCS was capable of something this dramatic.

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1 minute ago, Hoosier said:

Out of curiosity I went back and checked the obs from Laura in Lake Charles.  It may not have captured the maximum pressure drop rate there since the sensor failed at 132 mph in the eyewall, but they dropped 23 mb in 1 hour.  This was 25 mb in about one tenth of the time.    

Maybe some of the most intense hurricanes have a quicker drop rate than what Josh experienced, but this derecho was something else.  We know about the extreme pressure drops that can occur in tornadoes (even within seconds) but I never thought an MCS was capable of something this dramatic.

There's an excellent dataset on wunderground, except it doesn't appear as if any of the PWSs in Benton/Linn actually have data stored for 8/10, go figure.

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Corner of the street entrance, opposite side.

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This tree was broken off at the ground and tossed 30 ft.

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Interesting photo.... all the trees along the right side of the street are still standing while all the trees on the left side were blown down.

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Storm_15.thumb.jpg.e5fd4c495e6d6dcb58a5d22e4d16beb0.jpg

The top of the sister street where it meets the main avenue.  Across the avenue is a dumpy mobile home area.  Many of the big, old trees in that area look like the ones in this photo.  Many of the crappy homes got ripped up, too.

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This video was uploaded on August 17, taken possibly at Lindale in Cedar Rapids.  Highlight of this video is the husband is very calm while the wife is freaking out.

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