Historical ALERT Precipitation Gage Information
Historical Data For All Sensors
Ending Date & Time:
January
February
March
April
May
June
July
August
September
October
November
December
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
2026
2025
12:00:00 AM
01:00:00 AM
02:00:00 AM
03:00:00 AM
04:00:00 AM
05:00:00 AM
06:00:00 AM
07:00:00 AM
08:00:00 AM
09:00:00 AM
10:00:00 AM
11:00:00 AM
12:00:00 PM
01:00:00 PM
02:00:00 PM
03:00:00 PM
04:00:00 PM
05:00:00 PM
06:00:00 PM
07:00:00 PM
08:00:00 PM
09:00:00 PM
10:00:00 PM
11:00:00 PM
11:59:59 PM
Historical Data For Single Sensor
Select a Sensor:
2067 United Technologies Corp. (6102)
2068 Banjo Point (6138)
6001 Alamitos
6004 Almaden
6008 Biel Ranch
6015 Castro Valley
6016 Guadalupe Slough
6017 Coe Park
6018 Coit Ranch
6021 Coyote Reservoir
6023 Curtner Ranch
6034 Haskins Ranch
6036 Johnson Ranch
6041 Anderson Reservoir
6044 Loma Prieta
6048 Sunnyvale Water Pollution Control Plant
6067 Mount Hamilton
6069 Mount Umunhum
6077 Valley Christian
6079 Rinconada Water Treatment Plant
6098 Shanti Ashrama
6099 Penitencia Water Treatment Plant
6100 Stevens Creek Reservoir
6102 United Technologies Corp.
6104 Uvas Reservoir
6108 West Yard
6121 Mountain View
6123 Guadalupe Watershed
6125 Vasona Pump Station
6127 Cow Ridge
6128 Calero Watershed
6129 Palo Alto
6131 City of San Jose
6132 Evergreen
6134 Church Ave Percolation Ponds
6135 Uvas Canyon County Park
6138 Banjo Point
6139 West Little Llagas
6140 Rancho San Antonio
6141 Palm Ave
6142 Trappers Trail
6143 Edmundson Ave
6144 Maryknoll Fields
6145 Canada De Los Osos
6146 Los Trancos Park
6147 Westwind Barn (6147)
6148 Windy Hill Park
6149 Wunderlich
6150 Huddart Park
6151 Pacheco Reservoir
6999 Precip Test GOES
9999 Dummy sensor for testing
20001 Pulgas Raingauge (CDEC)
20002 La Honda Raingauge (CDEC)
20003 Las Cumbres Raingauge (CDEC)
20004 Schuliies Road Raingauge (CDEC)
20005 Burrell Station (CDEC)
20006 Ormsby Road Raingauge (CDEC)
20007 Mt Hamilton Raingauge (CDEC)
20008 Diablo Canyon Raingauge (CDEC)
21002 La Honda (CNRFC)
21010 Eureka Canyon (CNRFC)
21011 Corralitos (CNRFC)
21012 Corralitos CDF (CNRFC)
21013 Freedom (CNRFC)
21014 Watsonville (CNRFC)
21015 Hollister Muni Airport (CNRFC)
21016 Los Banos (CNRFC)
21017 Mines Road (CNRFC)
21018 Rose Peak (CNRFC)
21019 Auto Mall Pkwy at I-880 (CNRFC)
21020 Mission Peak (CNRFC)
21021 Crystal Springs (CNRFC)
21022 Half Moon Bay (CNRFC)
21023 Lower Crystal Springs (CNRFC)
21024 Redwood City (CNRFC)
21025 Test Buoy Pcp
200000 Guadalupe Rvr Abv Almaden MBP
200001 Guadalupe Rvr Abv Almaden QPF
Starting Date & Time:
January
February
March
April
May
June
July
August
September
October
November
December
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
2026
2025
12:00:00 AM
01:00:00 AM
02:00:00 AM
03:00:00 AM
04:00:00 AM
05:00:00 AM
06:00:00 AM
07:00:00 AM
08:00:00 AM
09:00:00 AM
10:00:00 AM
11:00:00 AM
12:00:00 PM
01:00:00 PM
02:00:00 PM
03:00:00 PM
04:00:00 PM
05:00:00 PM
06:00:00 PM
07:00:00 PM
08:00:00 PM
09:00:00 PM
10:00:00 PM
11:00:00 PM
11:59:59 PM
Ending Date & Time:
January
February
March
April
May
June
July
August
September
October
November
December
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
2026
2025
12:00:00 AM
01:00:00 AM
02:00:00 AM
03:00:00 AM
04:00:00 AM
05:00:00 AM
06:00:00 AM
07:00:00 AM
08:00:00 AM
09:00:00 AM
10:00:00 AM
11:00:00 AM
12:00:00 PM
01:00:00 PM
02:00:00 PM
03:00:00 PM
04:00:00 PM
05:00:00 PM
06:00:00 PM
07:00:00 PM
08:00:00 PM
09:00:00 PM
10:00:00 PM
11:00:00 PM
11:59:59 PM
Time Interval:
All Data
1 Hour
3 Hours
6 Hours
12 Hours
24 Hours
Historical Plot For Single Sensor
Select a Sensor:
2067 United Technologies Corp. (6102)
2068 Banjo Point (6138)
6001 Alamitos
6004 Almaden
6008 Biel Ranch
6015 Castro Valley
6016 Guadalupe Slough
6017 Coe Park
6018 Coit Ranch
6021 Coyote Reservoir
6023 Curtner Ranch
6034 Haskins Ranch
6036 Johnson Ranch
6041 Anderson Reservoir
6044 Loma Prieta
6048 Sunnyvale Water Pollution Control Plant
6067 Mount Hamilton
6069 Mount Umunhum
6077 Valley Christian
6079 Rinconada Water Treatment Plant
6098 Shanti Ashrama
6099 Penitencia Water Treatment Plant
6100 Stevens Creek Reservoir
6102 United Technologies Corp.
6104 Uvas Reservoir
6108 West Yard
6121 Mountain View
6123 Guadalupe Watershed
6125 Vasona Pump Station
6127 Cow Ridge
6128 Calero Watershed
6129 Palo Alto
6131 City of San Jose
6132 Evergreen
6134 Church Ave Percolation Ponds
6135 Uvas Canyon County Park
6138 Banjo Point
6139 West Little Llagas
6140 Rancho San Antonio
6141 Palm Ave
6142 Trappers Trail
6143 Edmundson Ave
6144 Maryknoll Fields
6145 Canada De Los Osos
6146 Los Trancos Park
6147 Westwind Barn (6147)
6148 Windy Hill Park
6149 Wunderlich
6150 Huddart Park
6151 Pacheco Reservoir
6999 Precip Test GOES
9999 Dummy sensor for testing
20001 Pulgas Raingauge (CDEC)
20002 La Honda Raingauge (CDEC)
20003 Las Cumbres Raingauge (CDEC)
20004 Schuliies Road Raingauge (CDEC)
20005 Burrell Station (CDEC)
20006 Ormsby Road Raingauge (CDEC)
20007 Mt Hamilton Raingauge (CDEC)
20008 Diablo Canyon Raingauge (CDEC)
21002 La Honda (CNRFC)
21010 Eureka Canyon (CNRFC)
21011 Corralitos (CNRFC)
21012 Corralitos CDF (CNRFC)
21013 Freedom (CNRFC)
21014 Watsonville (CNRFC)
21015 Hollister Muni Airport (CNRFC)
21016 Los Banos (CNRFC)
21017 Mines Road (CNRFC)
21018 Rose Peak (CNRFC)
21019 Auto Mall Pkwy at I-880 (CNRFC)
21020 Mission Peak (CNRFC)
21021 Crystal Springs (CNRFC)
21022 Half Moon Bay (CNRFC)
21023 Lower Crystal Springs (CNRFC)
21024 Redwood City (CNRFC)
21025 Test Buoy Pcp
200000 Guadalupe Rvr Abv Almaden MBP
200001 Guadalupe Rvr Abv Almaden QPF
Starting Date & Time:
January
February
March
April
May
June
July
August
September
October
November
December
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
2026
2025
12:00:00 AM
01:00:00 AM
02:00:00 AM
03:00:00 AM
04:00:00 AM
05:00:00 AM
06:00:00 AM
07:00:00 AM
08:00:00 AM
09:00:00 AM
10:00:00 AM
11:00:00 AM
12:00:00 PM
01:00:00 PM
02:00:00 PM
03:00:00 PM
04:00:00 PM
05:00:00 PM
06:00:00 PM
07:00:00 PM
08:00:00 PM
09:00:00 PM
10:00:00 PM
11:00:00 PM
11:59:59 PM
Ending Date & Time:
January
February
March
April
May
June
July
August
September
October
November
December
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
2026
2025
12:00:00 AM
01:00:00 AM
02:00:00 AM
03:00:00 AM
04:00:00 AM
05:00:00 AM
06:00:00 AM
07:00:00 AM
08:00:00 AM
09:00:00 AM
10:00:00 AM
11:00:00 AM
12:00:00 PM
01:00:00 PM
02:00:00 PM
03:00:00 PM
04:00:00 PM
05:00:00 PM
06:00:00 PM
07:00:00 PM
08:00:00 PM
09:00:00 PM
10:00:00 PM
11:00:00 PM
11:59:59 PM