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Old 09-20-2013, 03:10 PM
 
Location: Austin, TX
15,269 posts, read 35,630,016 times
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Pedernales near F'burg starting to rise, up to 600 cfs over the last hour. Llano continues to get more rain most of the day, peaking out just over 1,500 cfs, but spending a large portion of the day over 200 cfs. It has started to fall slightly, but out near Junction, it has spiked again. We are definitely in run-off mode, so even modest amounts of rain will help noticeably now.
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Old 09-20-2013, 03:14 PM
 
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One thing for sure, we were very close (within maybe a week or two) of the all-time lowest level ever: the new drought of record. Now, I think we'll escape this year without setting that new low.

I suspect 5' or so increase in the lake level from this event, if I had to guess based on what I am seeing. It's looking like lake may rise 1' simply from the instant runoff/rain capture (it's about halfway there right now), then the real increase will start to flow in... should continue rising for a couple of days after the rain stops.

If, however, a freak rain event happens in this storm (it's the right type of storm for it)... like 10+ inches in Marble Falls or something... then we'll witness some amazing lake recovery.
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Old 09-20-2013, 04:13 PM
 
Location: Austin, TX
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Quote:
Originally Posted by atxcio View Post
One thing for sure, we were very close (within maybe a week or two) of the all-time lowest level ever: the new drought of record. Now, I think we'll escape this year without setting that new low.

I suspect 5' or so increase in the lake level from this event, if I had to guess based on what I am seeing. It's looking like lake may rise 1' simply from the instant runoff/rain capture (it's about halfway there right now), then the real increase will start to flow in... should continue rising for a couple of days after the rain stops.

If, however, a freak rain event happens in this storm (it's the right type of storm for it)... like 10+ inches in Marble Falls or something... then we'll witness some amazing lake recovery.
Just to set a bench mark to compare later, Hydromet is currently reporting Lake Travis at elevation 619.00.

The LCRA River Report says Lake Travis & Buchanan at:

Quote:
Lake Conditions
This morning the level of Lake Buchanan is 985.30 ft msl which is about 24.9 feet below its historic September average of 1,010.23 ft msl. The level of Lake Travis is 618.63 ft msl which is about 45.2 feet below its historic September average of 663.80 ft msl. The total combined storage in the Highland Lakes two water storage reservoirs, Buchanan and Travis, is at 637,000 acre-feet, or 32 percent of capacity. The surface water temperature of Lake Travis as measured near Mansfield Dam is 85 degrees.

Last edited by CptnRn; 09-20-2013 at 05:34 PM..
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Old 09-20-2013, 04:34 PM
 
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Would have been interesting if this had happened on the first day of two weeks of ACL
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Old 09-20-2013, 09:49 PM
 
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I am wondering a little about that rainfall map. I looked up the more recent version, and although the numbers are higher, nothing in Austin comes close to what I measured at my house in Circle C: about 4 inches in 24 hours. I just have a little rain gauge, but I don't think it could be inches off.
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Old 09-20-2013, 09:55 PM
 
Location: Austin, TX
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When you zoom in, you get more gauges showing up, sometimes. The gauges just south and north of CC are both above 3", so not that far off.
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Old 09-21-2013, 05:18 AM
 
Location: Round Rock, TX
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Well I got about 2.5" out of it all here in East Round Rock yesterday. Love it. I hadn't seen rain like that in MONTHS.
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Old 09-21-2013, 06:48 AM
 
Location: Round Rock, Texas
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1.9" here in Brushy Creek on the west side of Round Rock.

I'll take it.
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Old 09-21-2013, 10:35 AM
 
Location: Austin, TX
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Quote:
Originally Posted by G Grasshopper View Post
I am wondering a little about that rainfall map. I looked up the more recent version, and although the numbers are higher, nothing in Austin comes close to what I measured at my house in Circle C: about 4 inches in 24 hours. I just have a little rain gauge, but I don't think it could be inches off.
In Legend Oaks my rain gauge had 1.75" in it yesterday when I emptied it. It was full and overflowing this morning so we had at at least 3.75" in the last 48 hours. Could be more since mine was overflowing.

But you are right, Hydromet does not even begin to show those amounts. The gauges in Austin are pretty far apart. There is one on Onion Creek South of us showing 4.35"
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Old 09-21-2013, 10:43 AM
 
Location: Austin, TX
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The 48 hour rainfalls this morning.

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