Lake Arrowhead: 74.2% full as of 2024-07-20

The elevation-storage rating curve used to produce the storage hydrograph is made of two segments: (1) the segment up to the conservation pool top (below the red line) is based on measured data, and (2) the segment in the flood pool (above the red line) is an extrapolation from the first segment and shouldn't be relied upon for flood storage information.

Historical Data

Date Percent Full Mean Water Level
(ft)
Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Surface Area
(acres)
Today 2024-07-20 74.2 921.55 170,915 170,915 230,359 12,211
Yesterday 2024-07-19 74.2 921.55 170,915 170,915 230,359 12,211
2 days ago 2024-07-18 74.3 921.57 171,160 171,160 230,359 12,221
1 week ago 2024-07-13 75.2 921.74 173,245 173,245 230,359 12,309
1 month ago 2024-06-20 77.5 922.17 178,585 178,585 230,359 12,530
3 months ago 2024-04-20 55.3 917.67 127,420 127,420 230,359 10,209
6 months ago 2024-01-20 53.3 917.21 122,778 122,778 230,359 9,972
1 year ago 2023-07-20 64.3 919.61 148,197 148,197 230,359 11,210
*

Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.

**

   Values above, including today's are averaged conditions. For near real-time instantaneous water level, see table below or the interactive map viewer.

Most Recent Instantaneous Water Level

Date/time Water Level
(ft)
Conservation Pool Elevation
(ft)
Height Above Conservation Pool
(ft)
Most recent 2024-07-20 14:00 921.51 926.00 -4.49
1 hour prior 2024-07-20 13:00 921.50 926.00 -4.50
2 hours prior 2024-07-20 12:00 921.53 926.00 -4.47
6 hours prior 2024-07-20 08:00 921.54 926.00 -4.46
12 hours prior 2024-07-20 02:00 921.57 926.00 -4.43
24 hours prior 2024-07-19 14:00 921.55 926.00 -4.45
48 hours prior 2024-07-18 14:00 921.57 926.00 -4.43
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1966-01-01
Vertical datum NGVD29
Dead pool elevation 874.00 ft above NGVD29
Service spillway crest elevation 926.00 ft above NGVD29
Maximum design elevation 939.55 ft above NGVD29
Top of dam elevation 944.00 ft above NGVD29
Conservation pool elevation 926.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2001-06-01 (source: TWDB) : GIS Data
2013-09-01 (source: TWDB) : GIS Data
Data Source USGS:07314800

Lake Location