Llano River at Llano

No flooding

USGS 08151500 · NWS LLAT2 · Llano County

152cfs

LCRA · 12:10 PM CDT

Gage height

1.53 ft

Share of river inflow

75%

Streamflow · past 7 days

149206263Sep 22Sep 26Sep 29
Streamflow, past 7 days, latest 138 cfs, peak 270 cfs on Sep 22, 6 PM (60 of 404 readings, evenly spaced, first and latest included)
TimeFlow (cfs)
Sep 22, 12 PM256
Sep 22, 3 PM265
Sep 22, 6 PM270
Sep 22, 8 PM270
Sep 22, 11 PM262
Sep 23, 2 AM253
Sep 23, 5 AM241
Sep 23, 8 AM230
Sep 23, 11 AM216
Sep 23, 1 PM205
Sep 23, 4 PM195
Sep 23, 7 PM192
Sep 23, 10 PM180
Sep 24, 1 AM180
Sep 24, 4 AM178
Sep 24, 6 AM175
Sep 24, 9 AM171
Sep 24, 12 PM166
Sep 24, 3 PM166
Sep 24, 6 PM165
Sep 24, 9 PM163
Sep 25, 12 AM161
Sep 25, 2 AM156
Sep 25, 5 AM159
Sep 25, 8 AM159
Sep 25, 11 AM159
Sep 25, 2 PM158
Sep 25, 5 PM156
Sep 25, 8 PM156
Sep 25, 10 PM153
Sep 26, 1 AM151
Sep 26, 4 AM149
Sep 26, 7 AM151
Sep 26, 10 AM151
Sep 26, 1 PM149
Sep 26, 4 PM146
Sep 26, 6 PM146
Sep 26, 9 PM143
Sep 27, 12 AM140
Sep 27, 3 AM143
Sep 27, 6 AM141
Sep 27, 9 AM143
Sep 27, 12 PM141
Sep 27, 2 PM140
Sep 27, 5 PM156
Sep 27, 8 PM137
Sep 27, 11 PM137
Sep 28, 2 AM137
Sep 28, 5 AM138
Sep 28, 8 AM138
Sep 28, 10 AM140
Sep 28, 1 PM135
Sep 28, 4 PM133
Sep 28, 7 PM133
Sep 28, 10 PM135
Sep 29, 1 AM135
Sep 29, 4 AM137
Sep 29, 6 AM138
Sep 29, 9 AM138
Sep 29, 12 PM138

15-minute readings · USGS · provisional

NWS flood stages

Major flood23.00 ftModerate flood12.00 ftMinor flood10.00 ft0.00 ftnow · 1.53 ft

now = USGS gage height · 12:00 PM CDT

Forecasts are issued routinely year-round.

Historic crests

  • Jun 14, 193541.50 ft380,000 cfs
  • Oct 16, 201840.14 ft278,000 cfs
  • Jun 23, 199739.10 ft260,000 cfs
  • Sep 10, 195232.60 ft232,000 cfs
  • Nov 4, 200028.65 ft
  • Jul 4, 202527.07 ft132,000 cfs
  • Nov 17, 200422.07 ft88,215 cfs
  • Feb 4, 199220.51 ft83,700 cfs

What floods at each stage

National Weather Service impact statements for this gauge, lowest stage first.

10.00 ftMinor lowland flooding can swamp boats in the lower Llano River in Kingsland.›

Minor lowland flooding can swamp boats in the lower Llano River in Kingsland.

12.00 ftModerate lowland flooding makes secondary roads and low bridges in the flood plain dangerous to motorists including the low water crossing of Ranch Road 3404/Slab Road near Kingsland. Equipment should be moved from low docks and boat ties loosened downstream in Kingsland.›

Moderate lowland flooding makes secondary roads and low bridges in the flood plain dangerous to motorists including the low water crossing of Ranch Road 3404/Slab Road near Kingsland. Equipment should be moved from low docks and boat ties loosened downstream in Kingsland.

16.00 ftModerate lowland flooding threatens docks and boats in the flood plain downstream in Kingsland. Secondary roads and bridges will be flooded and dangerous to motorists. Flow exceeds the USGS 1:2 year flood level.›

Moderate lowland flooding threatens docks and boats in the flood plain downstream in Kingsland. Secondary roads and bridges will be flooded and dangerous to motorists. Flow exceeds the USGS 1:2 year flood level.

20.00 ftFlow will be damaging to docks and boats downstream in Kingsland. The lowest secondary roads and bridges will be severely flooded and dangerous. Near the USGS 1:5 year flood level.›

Flow will be damaging to docks and boats downstream in Kingsland. The lowest secondary roads and bridges will be severely flooded and dangerous. Near the USGS 1:5 year flood level.

23.00 ftMajor lowland flooding makes primary and secondary roads and low bridges near the river and tributaries dangerous. Boats and docks are severely inundated downstream near and in Kingsland. Lowest resorts near the Llano River mouth in Kingsland flood.›

Major lowland flooding makes primary and secondary roads and low bridges near the river and tributaries dangerous. Boats and docks are severely inundated downstream near and in Kingsland. Lowest resorts near the Llano River mouth in Kingsland flood.

26.00 ftMajor flooding will threaten lowest homes from upstream near Castell to below Llano. Major damage will occur downsteam in Kingsland to boats and docks. Secondary and primary roads and bridges in the flood plain will be extremely dangerous to motorists. Lowest homes and businesses in the Highland Lakes below Kingsland will be flooded.›

Major flooding will threaten lowest homes from upstream near Castell to below Llano. Major damage will occur downsteam in Kingsland to boats and docks. Secondary and primary roads and bridges in the flood plain will be extremely dangerous to motorists. Lowest homes and businesses in the Highland Lakes below Kingsland will be flooded.

30.00 ftDisastrous flooding will reach lowest residences below Castell to below Llano. Flow will be to the slab of the city of Llano water treatment plant on the right bank just above Highway 16. Numerous resorts at Kingsland and in Lake LBJ will have severe flood damage. Boats, docks and facilities lining the lower Llano and Lake LBJ near Kingsland may be severely damaged or destroyed.›

Disastrous flooding will reach lowest residences below Castell to below Llano. Flow will be to the slab of the city of Llano water treatment plant on the right bank just above Highway 16. Numerous resorts at Kingsland and in Lake LBJ will have severe flood damage. Boats, docks and facilities lining the lower Llano and Lake LBJ near Kingsland may be severely damaged or destroyed.

32.00 ftDisastrous flooding well into the flood plain will cut off and potentially drown thousands of livestock. Homes, resorts, commercial buildings, boats, docks and marinas will flood disastrously above Castell to Marble Falls on Lake LBJ. Roads and bridges near the river will be severely flooded and dangerous to motorists. Exceeds the USGS 1:25 year flood.›

Disastrous flooding well into the flood plain will cut off and potentially drown thousands of livestock. Homes, resorts, commercial buildings, boats, docks and marinas will flood disastrously above Castell to Marble Falls on Lake LBJ. Roads and bridges near the river will be severely flooded and dangerous to motorists. Exceeds the USGS 1:25 year flood.

36.00 ftDisastrous life threatening flooding will damage numerous homes and businesses above Castell to Lake LBJ. Numerous resorts at and below Kingsland near the Llano River mouth will flood severely. Boats, docks and any gear that isn't removed from the river will be destroyed. Lower homes on Lake Travis flood severely. Flow exceeds the USGS 1:50 year flood level.›

Disastrous life threatening flooding will damage numerous homes and businesses above Castell to Lake LBJ. Numerous resorts at and below Kingsland near the Llano River mouth will flood severely. Boats, docks and any gear that isn't removed from the river will be destroyed. Lower homes on Lake Travis flood severely. Flow exceeds the USGS 1:50 year flood level.

38.00 ftRobinson City Park in Llano will flood. Many homes in Scotts Acres on south side of Llano will be severely damaged and lowest mobile homes destroyed in water up to 6 feet, some washing downstream. Many homes near Castell to below Llano will be damaged. The FM 2900 bridge in Kingsland will flood. Much of Kingsland Lodge in Kingsland will be destroyed. Many homes downstream in Marble Falls will flood as flow backs up Backbone Creek.›

Robinson City Park in Llano will flood. Many homes in Scotts Acres on south side of Llano will be severely damaged and lowest mobile homes destroyed in water up to 6 feet, some washing downstream. Many homes near Castell to below Llano will be damaged. The FM 2900 bridge in Kingsland will flood. Much of Kingsland Lodge in Kingsland will be destroyed. Many homes downstream in Marble Falls will flood as flow backs up Backbone Creek.