Hydrology Deep Dive • Llano County, TX

Lake Buchanan Water Level History & Climatology

Station: Lake Buchanan nr Burnet, TX (USGS 08148000) • Datum: NGVD29

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Dashboard Overview Water Detail & Climatology Wind & Weather Forecast
1,007.70 ft
Current Water Level
NGVD29 • provisional
1th %ile
Calendar Date Percentile
87 Years of Daily Record
1,025.0 ft
All-Time Record High
Observed in 2019
1,006.6 ft
All-Time Record Low
Observed in 2011

How to Read Historical Percentiles

Lower than 99% of the 87 years on record for this calendar window (1th percentile).

A reading in the middle 50% band (25th to 75th percentile) represents typical seasonal operating levels. Levels below the 25th percentile signify drought conditions or heavy fall drawdowns, while levels above the 75th percentile occur after unusually wet weather or flood-storage impoundment.

Monthly Elevation Climatology Table

Calculated across all 87 years of verified daily records for Lake Buchanan.

All elevations in feet (NGVD29)
Month 10th %ile (Low) 25th %ile (Lower) Median (Typical) 75th %ile (Upper) 90th %ile (High) Record Range
January 1,009.62 1,011.32 1,013.20 1,015.08 1,016.78 1,006.7 – 1,018.7
February 1,010.77 1,012.47 1,014.35 1,016.23 1,017.93 1,007.6 – 1,020.1
March 1,012.45 1,014.15 1,016.03 1,017.91 1,019.61 1,009.0 – 1,022.0
April 1,014.28 1,015.98 1,017.86 1,019.74 1,021.44 1,010.9 – 1,023.7
May 1,015.71 1,017.41 1,019.29 1,021.17 1,022.87 1,012.5 – 1,024.8
June 1,016.36 1,018.06 1,019.94 1,021.82 1,023.52 1,013.6 – 1,025.0
July 1,016.06 1,017.76 1,019.64 1,021.52 1,023.22 1,013.0 – 1,025.0
August 1,014.86 1,016.56 1,018.44 1,020.32 1,022.02 1,011.5 – 1,024.2
September 1,013.13 1,014.83 1,016.71 1,018.59 1,020.29 1,009.7 – 1,022.6
October Current 1,011.31 1,013.01 1,014.89 1,016.77 1,018.47 1,007.9 – 1,020.8
November 1,009.89 1,011.59 1,013.47 1,015.35 1,017.05 1,006.9 – 1,019.1
December 1,009.27 1,010.97 1,012.85 1,014.73 1,016.43 1,006.6 – 1,018.1

Hydrology & Property Risk Context

Dock & Boat Slip Usability

Floating docks need enough water under their pivots and gangways during seasonal fall drawdowns. Fixed docks face grounding if lake elevation drops below the piling footings.

Calculate Slip Clearance →

Seasonal Operating Rule Curves

Reservoirs managed by the U.S. Army Corps of Engineers or local river authorities intentionally lower pool targets in autumn to capture heavy winter and spring runoff.

View Seasonal Guide Curve →

Waterfront Property Buyers

Never buy a lake home based only on the water line you see on a single weekend. Check multi-decade low-water extremes to ensure your cove does not turn into dry mud during multi-year droughts.

Generate Elevation Risk Report →

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