The Walnut Creek Under Diamond Blvd. in Concord (Before & After Photos)

January 11, 2017 8:00 am · 11 comments

As we all know, it’s been raining.

Here’s a picture of the Walnut Creek flowing under Diamond Blvd. in Concord on Thursday afternoon, before the big storms.


And here’s a picture from the same location, taken on Tuesday afternoon.


Click on each photo for a much larger view.

Ricardoh January 11, 2017 at 8:41 AM

Last night close to midnight the rain came down as hard as I have ever seen rain come down. Appropriately there were two lightning strikes somewhere over Walnut Creek that matched the intensity of the rain. The thunder seemed to vibrated the house. I wonder if anyone knows where it struck?

jtkatec January 11, 2017 at 9:01 AM

I hope the troll who lives under the bridge is okay.

ClayDen January 11, 2017 at 9:08 AM

It was apparently about a mile or so from central Clayton, at it seemed to take about 5 seconds between the flash and the thunder, but I’m not sure of the direction. It’s easy to tell about how far away it is. Light travels at 186,000 miles per second, so it is essentially instantaneous from the source (the lightning strike) to you seeing it. However, sound is much slower, 661.7 kt (nautical miles per hour) at sea level and 59 degrees F (the speed of sound in air is related to the square root of the absolute temperature – not air density as is the common misconception). This makes it easy to get an approximation of how far away the lightning is. 661.7 kt is 1,118 feet per second, so it takes about 4.7 seconds for sound to travel a mile. So you just need to count the seconds from the time you see the flash until you hear the thunder to get a good idea of about how far away the lightning is.

The Mamba January 11, 2017 at 9:11 AM

Did they get the homeless out in time?

Bath January 11, 2017 at 9:12 AM

Bath Day for the bums.

XD January 11, 2017 at 9:38 AM


Amber January 11, 2017 at 10:33 AM

That is a pretty impressive photo, shoes is how powerful rain can be and how easy a flood could come from it. But really?!! Homeless jokes? I wouldn’t wish having to sleep out in that storm and not have a warm place to call home on anyone – I pray for those that are less fortunate than us that they find shelter and comfort somewhere…

Polarbearmarket January 11, 2017 at 12:44 PM

And now it is back closer to picture number one, at least on the south side of Willow Pass. I was amazed at how much lower it got from 4pm Tuesday until now.

ALF January 11, 2017 at 1:49 PM

Bummer…The tweaks hit the streets when the creek hits its peak

Schmee January 11, 2017 at 1:54 PM

Some homeless person pitched a tent literally on side of NB 680 freeway yesterday in the bushes about 3 feet from the shoulder. Just as you passed the YV exit. It was funny but I guess you make camp wherever the rain strands you.

Is This Thing On? January 11, 2017 at 4:49 PM

The homeless camps under 242 at the 680 split and under Concord Ave. are still there (unfortunately, since they usually trash the area). I rode the Iron Horse today and the John Glenn and Concord Ave. under-crossings are closed due to high water and LOADS of debris on the trail. Great to see the creek flowing full. A couple more storms like this and this drought will be history.

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