Storm Station

Live/Water/California/Arroyo Las Positas near Livermore

Arroyo Las Positas near Livermore

A water gauge in Alameda County, California. Its stage was 1.89 ft as of Sep 27, 5:30 AM PDT.

Gauge AOPC1Alameda County, CaliforniaEvery gauge in California

Stage now
1.89 ftreported Sep 27, 5:30 AM PDT
24 hour change
No changesince Sep 26, 5:30 AM
Rank
2,895of 3,123 in California, Sep 27
Elevation
456 ftabove sea level
County
Alameda County
Position
37.6999° N, 121.7737° W
Record since
2026

Water level

Arroyo Las Positas near Livermore

Stage is the height of the water's surface above the gauge's own fixed zero, in feet, not the depth of the water. Every point drawn is a reading the gauge sent, at the time it sent it.

Water level, 24 hours at Arroyo Las Positas near Livermore: the water from 1.89 to 1.90 feet of stage, the latest 1.89 feet.WATER LEVEL, 24 HOURSFTHIGH 1.90 FT, SEP 26, 9:15 AM · LOW 1.89 FT, SEP 26, 6:00 AM1.841.861.881.901.921.946 AM9 AM12 PM3 PM6 PM9 PMSep 273 AM1.89
Latest
1.89 ftSep 27, 5:30 AM
Highest
1.90 ftSep 26, 9:15 AM
Lowest
1.89 ftSep 26, 6:00 AM
Range
0.01 fthighest less lowest
Change
No changesince Sep 26, 6:00 AM
Readings
95
The readings these charts were drawn from, as a table
TimeStage ft
Sep 27, 5:30 AM1.89
Sep 27, 5:15 AM1.89
Sep 27, 5:00 AM1.89
Sep 27, 4:45 AM1.89
Sep 27, 4:30 AM1.89
Sep 27, 4:15 AM1.89
Sep 27, 4:00 AM1.89
Sep 27, 3:45 AM1.89
Sep 27, 3:30 AM1.90
Sep 27, 3:15 AM1.89
Sep 27, 3:00 AM1.89
Sep 27, 2:45 AM1.89
Sep 27, 2:30 AM1.89
Sep 27, 2:15 AM1.89
Sep 27, 2:00 AM1.89
Sep 27, 1:45 AM1.89
Sep 27, 1:30 AM1.89
Sep 27, 1:15 AM1.89
Sep 27, 1:00 AM1.89
Sep 27, 12:45 AM1.89
Sep 27, 12:30 AM1.89
Sep 27, 12:15 AM1.89
Sep 27, 12:00 AM1.89
Sep 26, 11:45 PM1.89
Sep 26, 11:30 PM1.89
Sep 26, 11:15 PM1.89
Sep 26, 11:00 PM1.89
Sep 26, 10:45 PM1.89
Sep 26, 10:30 PM1.89
Sep 26, 10:15 PM1.89
Sep 26, 10:00 PM1.89
Sep 26, 9:45 PM1.89
Sep 26, 9:30 PM1.89
Sep 26, 9:15 PM1.89
Sep 26, 9:00 PM1.89
Sep 26, 8:45 PM1.89
Sep 26, 8:30 PM1.89
Sep 26, 8:15 PM1.89
Sep 26, 8:00 PM1.89
Sep 26, 7:45 PM1.89
Sep 26, 7:30 PM1.89
Sep 26, 7:15 PM1.89
Sep 26, 7:00 PM1.89
Sep 26, 6:45 PM1.89
Sep 26, 6:30 PM1.89
Sep 26, 6:15 PM1.89
Sep 26, 6:00 PM1.89
Sep 26, 5:45 PM1.89
Sep 26, 5:30 PM1.89
Sep 26, 5:15 PM1.89
Sep 26, 5:00 PM1.89
Sep 26, 4:45 PM1.89
Sep 26, 4:30 PM1.89
Sep 26, 4:15 PM1.89
Sep 26, 4:00 PM1.89
Sep 26, 3:45 PM1.89
Sep 26, 3:30 PM1.89
Sep 26, 3:15 PM1.89
Sep 26, 3:00 PM1.89
Sep 26, 2:45 PM1.89
Sep 26, 2:30 PM1.89
Sep 26, 2:15 PM1.89
Sep 26, 2:00 PM1.89
Sep 26, 1:45 PM1.89
Sep 26, 1:30 PM1.89
Sep 26, 1:15 PM1.89
Sep 26, 1:00 PM1.89
Sep 26, 12:45 PM1.89
Sep 26, 12:30 PM1.89
Sep 26, 12:15 PM1.90
Sep 26, 12:00 PM1.90
Sep 26, 11:45 AM1.90
Sep 26, 11:30 AM1.90
Sep 26, 11:15 AM1.90
Sep 26, 11:00 AM1.90
Sep 26, 10:45 AM1.90
Sep 26, 10:30 AM1.90
Sep 26, 10:15 AM1.90
Sep 26, 10:00 AM1.90
Sep 26, 9:45 AM1.90
Sep 26, 9:30 AM1.90
Sep 26, 9:15 AM1.90
Sep 26, 9:00 AM1.89
Sep 26, 8:45 AM1.89
Sep 26, 8:30 AM1.89
Sep 26, 8:15 AM1.89
Sep 26, 8:00 AM1.89
Sep 26, 7:45 AM1.89
Sep 26, 7:30 AM1.89
Sep 26, 7:15 AM1.89
Sep 26, 7:00 AM1.89
Sep 26, 6:45 AM1.89
Sep 26, 6:30 AM1.89
Sep 26, 6:15 AM1.89
Sep 26, 6:00 AM1.89
Water level, 7 days at Arroyo Las Positas near Livermore: the water from 1.88 to 1.90 feet of stage, the latest 1.89 feet.WATER LEVEL, 7 DAYSFTHIGH 1.90 FT, SEP 26, 9:15 AM · LOW 1.88 FT, SEP 20, 6:00 AM1.821.851.881.901.931.95Mon 21Tue 22Wed 23Thu 24Fri 25Sat 26Sun 271.89
Latest
1.89 ftSep 27, 5:30 AM
Highest
1.90 ftSep 26, 9:15 AM
Lowest
1.88 ftSep 20, 6:00 AM
Range
0.02 fthighest less lowest
Change
Rose 0.01 ftsince Sep 20, 6:00 AM
Readings
670
The readings these charts were drawn from, as a table
TimeStage ft
Sep 27, 5:30 AM1.89
Sep 27, 4:45 AM1.89
Sep 27, 3:45 AM1.89
Sep 27, 2:45 AM1.89
Sep 27, 1:45 AM1.89
Sep 27, 12:45 AM1.89
Sep 26, 11:45 PM1.89
Sep 26, 10:45 PM1.89
Sep 26, 9:45 PM1.89
Sep 26, 8:45 PM1.89
Sep 26, 7:45 PM1.89
Sep 26, 6:45 PM1.89
Sep 26, 5:45 PM1.89
Sep 26, 4:45 PM1.89
Sep 26, 3:45 PM1.89
Sep 26, 2:45 PM1.89
Sep 26, 1:45 PM1.89
Sep 26, 12:45 PM1.89
Sep 26, 11:45 AM1.90
Sep 26, 10:45 AM1.90
Sep 26, 9:45 AM1.90
Sep 26, 8:45 AM1.89
Sep 26, 7:45 AM1.89
Sep 26, 6:45 AM1.89
Sep 26, 5:45 AM1.89
Sep 26, 4:45 AM1.89
Sep 26, 3:45 AM1.89
Sep 26, 2:45 AM1.89
Sep 26, 1:45 AM1.89
Sep 26, 12:45 AM1.89
Sep 25, 11:45 PM1.89
Sep 25, 10:45 PM1.89
Sep 25, 9:45 PM1.89
Sep 25, 8:45 PM1.89
Sep 25, 7:45 PM1.89
Sep 25, 6:45 PM1.89
Sep 25, 5:45 PM1.89
Sep 25, 4:45 PM1.89
Sep 25, 3:45 PM1.89
Sep 25, 2:45 PM1.89
Sep 25, 1:45 PM1.89
Sep 25, 12:45 PM1.89
Sep 25, 11:45 AM1.89
Sep 25, 10:45 AM1.89
Sep 25, 9:45 AM1.89
Sep 25, 8:45 AM1.89
Sep 25, 7:45 AM1.89
Sep 25, 6:45 AM1.89
Sep 25, 5:45 AM1.89
Sep 25, 4:45 AM1.89
Sep 25, 3:45 AM1.89
Sep 25, 2:45 AM1.89
Sep 25, 1:45 AM1.89
Sep 25, 12:45 AM1.89
Sep 24, 11:45 PM1.89
Sep 24, 10:45 PM1.89
Sep 24, 9:45 PM1.89
Sep 24, 8:45 PM1.89
Sep 24, 7:30 PM1.89
Sep 24, 6:45 PM1.89
Sep 24, 5:45 PM1.89
Sep 24, 4:45 PM1.89
Sep 24, 3:45 PM1.89
Sep 24, 2:45 PM1.89
Sep 24, 1:45 PM1.89
Sep 24, 12:45 PM1.89
Sep 24, 11:45 AM1.89
Sep 24, 10:45 AM1.89
Sep 24, 9:45 AM1.89
Sep 24, 8:45 AM1.89
Sep 24, 7:45 AM1.89
Sep 24, 6:45 AM1.89
Sep 24, 5:45 AM1.89
Sep 24, 4:45 AM1.89
Sep 24, 3:45 AM1.89
Sep 24, 2:45 AM1.89
Sep 24, 1:45 AM1.89
Sep 24, 12:45 AM1.89
Sep 23, 11:45 PM1.89
Sep 23, 10:45 PM1.89
Sep 23, 9:45 PM1.89
Sep 23, 8:45 PM1.89
Sep 23, 7:45 PM1.89
Sep 23, 6:45 PM1.89
Sep 23, 5:45 PM1.89
Sep 23, 4:45 PM1.89
Sep 23, 3:45 PM1.89
Sep 23, 2:45 PM1.89
Sep 23, 1:45 PM1.89
Sep 23, 12:45 PM1.89
Sep 23, 11:45 AM1.89
Sep 23, 10:45 AM1.89
Sep 23, 9:45 AM1.89
Sep 23, 8:45 AM1.89
Sep 23, 7:45 AM1.89
Sep 23, 6:45 AM1.89
Sep 23, 5:45 AM1.89
Sep 23, 4:45 AM1.89
Sep 23, 3:45 AM1.89
Sep 23, 2:45 AM1.89
Sep 23, 1:45 AM1.89
Sep 23, 12:45 AM1.89
Sep 22, 11:45 PM1.89
Sep 22, 10:45 PM1.89
Sep 22, 9:45 PM1.88
Sep 22, 8:45 PM1.88
Sep 22, 7:45 PM1.88
Sep 22, 6:45 PM1.88
Sep 22, 5:45 PM1.88
Sep 22, 4:45 PM1.88
Sep 22, 3:45 PM1.88
Sep 22, 2:45 PM1.89
Sep 22, 1:45 PM1.89
Sep 22, 12:45 PM1.89
Sep 22, 11:45 AM1.89
Sep 22, 10:45 AM1.89
Sep 22, 9:45 AM1.89
Sep 22, 8:45 AM1.89
Sep 22, 7:45 AM1.89
Sep 22, 6:45 AM1.89
Sep 22, 5:45 AM1.89
Sep 22, 4:45 AM1.88
Sep 22, 3:45 AM1.89
Sep 22, 2:45 AM1.89
Sep 22, 1:45 AM1.88
Sep 22, 12:45 AM1.88
Sep 21, 11:45 PM1.88
Sep 21, 10:45 PM1.88
Sep 21, 9:45 PM1.88
Sep 21, 8:45 PM1.88
Sep 21, 7:45 PM1.88
Sep 21, 6:45 PM1.88
Sep 21, 5:45 PM1.88
Sep 21, 4:45 PM1.88
Sep 21, 3:45 PM1.88
Sep 21, 2:45 PM1.88
Sep 21, 1:45 PM1.88
Sep 21, 12:45 PM1.88
Sep 21, 11:45 AM1.88
Sep 21, 10:45 AM1.88
Sep 21, 9:45 AM1.88
Sep 21, 8:45 AM1.89
Sep 21, 7:45 AM1.88
Sep 21, 6:45 AM1.88
Sep 21, 5:45 AM1.88
Sep 21, 4:45 AM1.88
Sep 21, 3:45 AM1.89
Sep 21, 2:45 AM1.89
Sep 21, 1:45 AM1.88
Sep 21, 12:45 AM1.89
Sep 20, 11:45 PM1.89
Sep 20, 10:45 PM1.88
Sep 20, 9:45 PM1.88
Sep 20, 8:45 PM1.88
Sep 20, 7:45 PM1.88
Sep 20, 6:45 PM1.88
Sep 20, 5:45 PM1.88
Sep 20, 4:45 PM1.88
Sep 20, 3:45 PM1.88
Sep 20, 2:45 PM1.88
Sep 20, 1:45 PM1.88
Sep 20, 12:45 PM1.88
Sep 20, 11:45 AM1.88
Sep 20, 10:45 AM1.88
Sep 20, 9:45 AM1.88
Sep 20, 8:45 AM1.88
Sep 20, 7:45 AM1.88
Sep 20, 6:45 AM1.88
Water level, 30 days at Arroyo Las Positas near Livermore: the water from 1.87 to 1.92 feet of stage, the latest 1.89 feet.WATER LEVEL, 30 DAYSFTHIGH 1.92 FT, SEP 4, 10:00 AM · LOW 1.87 FT, AUG 28, 4:00 PM1.861.881.901.921.94Aug 28Sep 2Sep 7Sep 12Sep 17Sep 221.89
Latest
1.89 ftSep 27, 5:30 AM
Highest
1.92 ftSep 4, 10:00 AM
Lowest
1.87 ftAug 28, 4:00 PM
Range
0.05 fthighest less lowest
Change
Rose 0.01 ftsince Aug 28, 6:00 AM
Readings
2,855
The readings these charts were drawn from, as a table
DayHigh ftLow ftAverage ftLast ftReadings
Sep 271.901.891.891.8923
Sep 261.901.891.891.8996
Sep 251.891.881.891.8996
Sep 241.891.891.891.8995
Sep 231.891.881.891.8996
Sep 221.891.881.891.8996
Sep 211.891.881.881.8896
Sep 201.891.881.881.8996
Sep 191.891.881.881.8896
Sep 181.891.881.881.8895
Sep 171.891.881.881.8895
Sep 161.881.871.881.8894
Sep 151.881.871.881.8795
Sep 141.881.871.871.8796
Sep 131.881.871.871.8796
Sep 121.891.871.881.8796
Sep 111.891.871.881.8896
Sep 101.891.871.881.8896
Sep 91.891.871.881.8896
Sep 81.891.881.881.8896
Sep 71.891.881.881.8896
Sep 61.891.881.891.8896
Sep 51.901.881.891.8989
Sep 41.921.881.901.8996
Sep 31.901.881.891.8896
Sep 21.891.881.891.8995
Sep 11.891.881.881.8887
Aug 311.891.881.881.8895
Aug 301.891.871.881.8896
Aug 291.891.881.881.8896
Aug 281.881.871.881.8872

How it reports

Rank
2,895of 3,123 in California, Sep 27
Schedule
every 15 minon the hour's :00, :15, :30 and :45
Reports received, 24 hours
80 of 9683.3% of its schedule
Reports received, 7 days
125 of 14685.6% of its schedule
Longest silence, 7 days
1 h 30 minfrom Sep 26, 7:30 AM
Latest report
Sep 27, 5:30 AMlocal time
Time to reach Storm Station
29 min9 in 10 within 30 min

Its schedule is one report every 15 min, 96 in 24 hours. Two reports in the same 15 min count as one received.

Near Arroyo Las Positas near Livermore

How to read a gauge

A gauge measures the height of the water where it stands, its stage, in feet above a fixed mark at that gauge. Two gauges' stages are not comparable: each is measured from its own mark, and a reservoir's is often its height above sea level.

The stage shown is the latest the gauge reported, with the time it reported it. Storm Station hears each gauge on its own schedule and ranks it among its state's stations by how reliably it reports: that is its 247 rank.