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Old 05-26-2014, 03:06 PM
 
Location: Austin, TX
12,059 posts, read 13,896,729 times
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After the rains,

Current cfs Colorado River @ San Saba 4958 cfs
San Saba @ San Saba 1968 cfs
Llano River @ Mason 1950 cfs
Pedernales River @ Johnson City 286 cfs

It seems these are pretty high values, except for the Pedernales River, but I've seen that normally in the 20-50 cfs range so it seems good to me.

In comparison, the Colorado River at Bastrop is 674 cfs.

To me, this would indicate that Lake Buchanan would be seeing a very good rise from these storms and Lake Travis not as much but some.

However, LCRA says they don't expect much of an increase. There are some areas in the basin that received over 5 inches of rain, I'm seeing a station that had 7.8 inches of rain in the past week.

My question is, if this is not creating runoff, and this is clearly above average rainfall, then what would?
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Old 05-26-2014, 03:24 PM
 
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One more really good storm would get those suckers cranking, now that the ground it saturated.

Let's hope this next system packs another 2-3" in the next couple days.
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Old 05-26-2014, 06:29 PM
 
Location: Austin, TX
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These rains don't always cause big rises in the lake, but they DO result in a slower fall rate - doesn't seem very reassuring, but it is something. GOOD flow rates are in the 30,000+ flow rates on the Llano......
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Old 05-26-2014, 06:59 PM
 
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10 inches right now would be like a 20-30 ft increase because it would all runoff. 10 inches 2 weeks from now wont do anything. 18-20 inches would fill the lake.
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Old 05-26-2014, 07:11 PM
 
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I'd settle for 3-4" in the next two "waves" we're supposed to get before this low pressure system moves on.

A few friends and I were sitting around on the deck last night talking about how great the weather has been lately and we got on the topic of 2007 - really seems like this summer is starting to mirror that one - if we can get the 14" June/July we had that year - we'll be back in business. I just hope that if that happens, they leave the stage 2 restrictions in place.
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Old 05-26-2014, 08:06 PM
 
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LCRA has released several feet of water over the last few weeks and will likely release some more due to these rains. Stored water is treated differently than run of river water.
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Old 05-27-2014, 06:06 AM
 
Location: Austin, TX
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After last night rains,

Pedernales River @ Johnson City 3385 cfs
Llano River @ Llano 2917 cfs

The Pedernales River increase bodes well for Lake Travis.
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Old 05-27-2014, 07:24 AM
 
Location: Austin, TX
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As of this morning, the Lake is about +9" over the last four days....it beats the hell out of minus an inch or two . In the middle of summer, the lake looses about 1 inch per day, largely due to evaporation.
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Old 05-27-2014, 07:36 AM
 
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FYI, LCRA's Hydromet website is a great resource and fun to play around with.

Hydromet
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Old 05-27-2014, 07:49 AM
 
Location: Austin, TX
15,269 posts, read 35,646,924 times
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Yes, I think there are a few of us now that are addicted to the web site. It seems to be the best one that I have found in the state for summary river/lake data. Very user friendly and informative. I will give kudos to the LCRA for maintaining it....
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